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1

Operation of a GERDA Phase I prototype detector in liquid argon and nitrogen  

E-Print Network [OSTI]

The GERDA (GERmanium Detector Array) experiment aiming to search for the neutrinoless double beta decay of 76Ge at the Laboratori Nazionali Del Gran Sasso (LNGS), Italy, will operate bare enriched high-purity germanium (HPGe) detectors in liquid argon. GERDA Phase I will use the enriched diodes from the previous Heidelberg-Moscow (HdM) and IGEX experiments. With the HPGe detectors mounted in a low-mass holder, GERDA aims at an excellent energy resolution and extremely low background. The goal is to check the claim for the neutrinoless double beta decay evidence in the HdM 76Ge experiment within one year of data taking. Before dismounting the enriched diodes from their cryostat, the performance parameters of the HdM and the IGEX detectors have been measured. The diodes have been removed from their cryostats, their dimensions measured and they have been put under va-cuum in a transportation container. They are now being refurbished for GERDA Phase I at Canberra Semiconductor NV. Before operating the enriched diodes, a non-enriched HPGe p-type detector mounted in a low-mass holder is operated in the liquid argon test facility of the GERDA Detector Laboratory (GDL) at LNGS. Since January 2006, the testing of the prototype detector is being carried out in the GDL as well as at the site of the detector manufacturer.

M. Barnabé Heider; A. Bakalyarov; L. Bezrukov; C. Cattadori; O. Chkvorets; K. Gusev; M. Hult; I. Kirpichnikov; V. Lebedev; G. Marissens; P. Peiffer; S. Schönert; M. Shirchenko; A. Smolnikov; A. Vasenko; S. Vasiliev; S. Zhukov

2008-12-20T23:59:59.000Z

2

Large area liquid argon detectors for interrogation systems  

SciTech Connect (OSTI)

Measurements of the efficiency, pulse shape, and energy and time resolution of liquid argon (LAr) detectors are presented. Liquefied noble gas-based (LNbG) detectors have been developed for the detection of dark matter and neutrinoless double-beta decay. However, the same qualities that make LNbG detectors ideal for these applications, namely their size, cost, efficiency, pulse shape discrimination and resolution, make them promising for portal screening and the detection of Special Nuclear Materials (SNM). Two 18-liter prototype detectors were designed, fabricated, and tested, one with pure LAr and the other doped with liquid Xe (LArXe). The LArXe detector presented the better time and energy resolution of 3.3 ns and 20% at 662 KeV, respectively. The total efficiency of the detector was measured to be 35% with 4.5% of the total photons detected in the photopeak.

Gary, Charles; Kane, Steve; Firestone, Murray I.; Smith, Gregory [Adelphi Technology LLC, Purdue Technology Center, 5225 Exploration Drive, Indianapolis, IN 46241 (United States); Gozani, Tsahi; Brown, Craig; Kwong, John; King, Michael J. [Rapiscan Laboratories, 520 Almanor Avenue, Sunnyvale, CA 94085 (United States); Nikkel, James A.; McKinsey, Dan [Physics Department, Yale University, New Haven, CT 06520 (United States)

2013-04-19T23:59:59.000Z

3

Liquid Argon Cryogenic Detector Calibration by Inelastic Scattering of Neutrons  

E-Print Network [OSTI]

A method for calibration of cryogenic liquid argon detector response to recoils with certain energy -8.2 keV - is proposed. The method utilizes a process of inelastic scattering of monoenergetic neutrons produced by fusion DD neutron generator. Features of kinematics of inelastic scattering cause sufficient (forty times) increase in count rate of useful events relative to traditional scheme exploited elastic scattering with the same recoil energy and compatible energy resolution. The benefits of the proposed scheme of calibration most well implemented with the use of tagged neutron generator as a neutron source that allows to eliminate background originated from casual coincidence of signals on cryogenic detector and additional detector of scattered neutrons.

Sergey Polosatkin; Evgeny Grishnyaev; Alexander Dolgov

2014-07-10T23:59:59.000Z

4

Design and Construction of Prototype Dark Matter Detectors  

SciTech Connect (OSTI)

The Lepton Quark Studies (LQS) group is engaged in searching for dark matter using the Dark Matter Time Projection Chamber (DMTPC) at the Waste Isolation Pilot Plant (WIPP) (Carlsbad, NM). DMTPC is a direction-sensitive dark matter detector designed to measure the recoil direction and energy deposited by fluorine nuclei recoiling from the interaction with incident WIMPs. In the past year, the major areas of progress have been: #15; to publish the #12;first dark matter search results from a surface run of the DMTPC prototype detector, #15; to build and install the 10L prototype in the underground laboratory at WIPP which will house the 1 m{sup 3} detector, and #15; to demonstrate charge and PMT readout of the TPC using prototype detectors, which allow triggering and #1;{Delta}z measurement to be used in the 1 m{sup 3} detector under development.

Peter Fisher

2012-03-23T23:59:59.000Z

5

Testing of High Voltage Surge Protection Devices for Use in Liquid Argon TPC Detectors  

E-Print Network [OSTI]

In this paper we demonstrate the capability of high voltage varistors and gas discharge tube arrestors for use as surge protection devices in liquid argon time projection chamber detectors. The insulating and clamping behavior of each type of device is characterized in air (room temperature), and liquid argon (90~K), and their robustness under high voltage and high energy surges in cryogenic conditions is verified. The protection of vulnerable components in liquid argon during a 150 kV high voltage discharge is also demonstrated. Each device is tested for argon contamination and light emission effects, and both are constrained to levels where no significant impact upon liquid argon time projection chamber functionality is expected. Both devices investigated are shown to be suitable for HV surge protection applications in cryogenic detectors.

J. Asaadi; J. M. Conrad; S. Gollapinni; B. J. P. Jones; H. Jostlein; J. M. St. John; T. Strauss; S. Wolbers; J. Zennamo

2014-06-23T23:59:59.000Z

6

argon ionization detector: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Goeldi; S. Janos; I. Kreslo; M. Luethi; C. Rudolf von Rohr; T. Strauss; T. Tolba; M. S. Weber 2014-06-16 5 A method to suppress dielectric breakdowns in liquid argon ionization...

7

Photodegradation mechanisms of tetraphenyl butadiene coatings for liquid argon detectors  

E-Print Network [OSTI]

We report on studies of degradation mechanisms of tetraphenyl butadiene (TPB) coatings of the type used in neutrino and dark matter liquid argon experiments. Using gas chromatography coupled to mass spectrometry we have ...

Jones, Benjamin James Poyner

8

Hit efficiency study of CMS prototype forward pixel detectors  

SciTech Connect (OSTI)

In this paper the author describes the measurement of the hit efficiency of a prototype pixel device for the CMS forward pixel detector. These pixel detectors were FM type sensors with PSI46V1 chip readout. The data were taken with the 120 GeV proton beam at Fermilab during the period of December 2004 to February 2005. The detectors proved to be highly efficient (99.27 {+-} 0.02%). The inefficiency was primarily located near the corners of the individual pixels.

Kim, Dongwook; /Johns Hopkins U.

2006-01-01T23:59:59.000Z

9

Sensor Development and Readout Prototyping for the STAR Pixel Detector  

SciTech Connect (OSTI)

The STAR experiment at the Relativistic Heavy Ion Collider (RHIC) is designing a new vertex detector. The purpose of this upgrade detector is to provide high resolution pointing to allow for the direct topological reconstruction of heavy flavor decays such as the D{sup 0} by finding vertices displaced from the collision vertex by greater than 60 microns. We are using Monolithic Active Pixel Sensor (MAPS) as the sensor technology and have a coupled sensor development and readout system plan that leads to a final detector with a <200 {micro}s integration time, 400 M pixels and a coverage of -1 < {eta} < 1. We present our coupled sensor and readout development plan and the status of the prototyping work that has been accomplished.

Greiner, L.; Anderssen, E.; Matis, H.S.; Ritter, H.G.; Stezelberger, T.; Szelezniak, M.; Sun, X.; Vu, C.; Wieman, H.

2009-01-14T23:59:59.000Z

10

argon avalanche detector: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

in view of their potential application in coherent neutrino-nucleus scattering, dark-matter search and in other rare-event experiments. The detectors comprised a 1 cm thick...

11

argon avalanche detectors: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

in view of their potential application in coherent neutrino-nucleus scattering, dark-matter search and in other rare-event experiments. The detectors comprised a 1 cm thick...

12

Photodegradation Mechanisms of Tetraphenyl Butadiene Coatings for Liquid Argon Detectors  

E-Print Network [OSTI]

We report on studies of degradation mechanisms of tetraphenyl butadiene (TPB) coatings of the type used in neutrino and dark matter liquid argon experiments. Using gas chromatography coupled to mass spectrometry we have detected the ultraviolet-blocking impurity benzophenone (BP). We monitored the drop in performance and increase of benzophenone concentration in TPB plates with exposure to ultraviolet (UV) light, and demonstrate the correlation between these two variables. Based on the presence and initially exponential increase in the concentration of benzophenone observed, we propose that TPB degradation is a free radical-mediated photooxidation reaction, which is subsequently confirmed by displaying delayed degradation using a free radical inhibitor. Finally we show that the performance of wavelength-shifting coatings of the type envisioned for the LBNE experiment can be improved by 10-20%, with significantly delayed UV degradation, by using a 20% admixture of 4-tert-Butylcatechol.

B. J. P. Jones; J. K. VanGemert; J. M. Conrad; A. Pla-Dalmau

2012-11-30T23:59:59.000Z

13

Photodegradation Mechanisms of Tetraphenyl Butadiene Coatings for Liquid Argon Detectors  

E-Print Network [OSTI]

We report on studies of degradation mechanisms of tetraphenyl butadiene (TPB) coatings of the type used in neutrino and dark matter liquid argon experiments. Using gas chromatography coupled to mass spectrometry we have detected the ultraviolet-blocking impurity benzophenone (BP). We monitored the drop in performance and increase of benzophenone concentration in TPB plates with exposure to ultraviolet (UV) light, and demonstrate the correlation between these two variables. Based on the presence and initially exponential increase in the concentration of benzophenone observed, we propose that TPB degradation is a free radical-mediated photooxidation reaction, which is subsequently confirmed by displaying delayed degradation using a free radical inhibitor. Finally we show that the performance of wavelength-shifting coatings of the type envisioned for the LBNE experiment can be improved by 10-20%, with significantly delayed UV degradation, by using a 20% admixture of 4-tert-Butylcatechol.

Jones, B J P; Conrad, J M; Pla-Dalmau, A

2013-01-01T23:59:59.000Z

14

Expected performance of an ideal liquid argon neutrino detector with enhanced sensitivity to scintillation light  

E-Print Network [OSTI]

Scintillation light is used in liquid argon (LAr) neutrino detectors to provide a trigger signal, veto information against cosmic rays, and absolute event timing. In this work, we discuss additional opportunities offered by detectors with enhanced sensitivity to scintillation light, that is with light collection efficiencies of about $10^{-3}$. We focus on two key detector performance indicators for neutrino oscillation physics: calorimetric neutrino energy reconstruction and neutrino/antineutrino separation in a non-magnetized detector. Our results are based on detailed simulations, with neutrino interactions modelled according to the GENIE event generator, while the charge and light responses of a large LAr ideal detector are described by the Geant4 and NEST simulation tools. A neutrino energy resolution as good as 3.3\\% RMS for 4 GeV electron neutrino charged-current interactions can in principle be obtained in a large detector of this type, by using both charge and light information. By exploiting muon capture in argon and scintillation light information to veto muon decay electrons, we also obtain muon neutrino identification efficiencies of about 50\\%, and muon antineutrino misidentification rates at the few percent level, for few-GeV neutrino interactions that are fully contained. We argue that the construction of large LAr detectors with sufficiently high light collection efficiencies is in principle possible.

M. Sorel

2014-09-05T23:59:59.000Z

15

Performance of a Quintuple-GEM Based RICH Detector Prototype  

E-Print Network [OSTI]

\\v{C}erenkov technology is one of the first choices when it comes to particle identification in high energy particle collision applications. Particularly challenging is the deployment in the high pseudorapidity\\footnote{Spatial coordinate describing the angle of a particle relative to the beam axis: $\\eta\\equiv -ln\\left[\\tan\\left(\\frac{\\theta}{2}\\right)\\right]$} (forward) direction where particle identification must allow for high lab momenta, up to about 50 GeV/c. In this region \\v{C}erenkov Ring-Imaging is among the most viable solutions and will provide the desired performance if the radiator has a low index of refraction, high yield of photoelectrons, and allows precise measurement of the position of each photoelectron. A RICH detector prototype based on a novel concept that allows the use of a significantly shorter radiator length compared to conventional RICH detectors has been constructed and tested. The setup and the results obtained are described.

Blatnik, M; Deshpande, A; Dixit, D; Feege, N; Hemmick, T K; Lewis, B; Purschke, M L; Roh, W; Torales-Acosta, F; Videbaek, T; Zajac, S

2015-01-01T23:59:59.000Z

16

A prototype station for ARIANNA: a detector for cosmic neutrinos  

E-Print Network [OSTI]

The Antarctic Ross Iceshelf Antenna Neutrino Array (ARIANNA) is a proposed detector for ultra-high energy astrophysical neutrinos. It will detect coherent radio Cherenkov emission from the particle showers produced by neutrinos with energies above about 10^17 eV. ARIANNA will be built on the Ross Ice Shelf just off the coast of Antarctica, where it will eventually cover about 900 km^2 in surface area. There, the ice-water interface below the shelf reflects radio waves, giving ARIANNA sensitivity to downward going neutrinos and improving its sensitivity to horizontally incident neutrinos. ARIANNA detector stations will each contain 4-8 antennas which search for brief pulses of 50 MHz to 1 GHz radio emission from neutrino interactions. We describe a prototype station for ARIANNA which was deployed in Moore's Bay on the Ross Ice Shelf in December 2009, discuss the design and deployment, and present some initial figures on performance. The ice shelf thickness was measured to be 572 +/- 6 m at the deployment site.

Lisa Gerhardt; Spencer R. Klein; Thorsten Stezelberger; Steve Barwick; Kamlesh Dookayka; Jordan Hanson; Ryan Nichol

2010-05-27T23:59:59.000Z

17

Small-Scale Readout Systems Prototype for the STAR PIXEL Detector  

SciTech Connect (OSTI)

A prototype readout system for the STAR PIXEL detector in the Heavy Flavor Tracker (HFT) vertex detector upgrade is presented. The PIXEL detector is a Monolithic Active Pixel Sensor (MAPS) based silicon pixel vertex detector fabricated in a commercial CMOS process that integrates the detector and front-end electronics layers in one silicon die. Two generations ofMAPS prototypes designed specifically for the PIXEL are discussed. We have constructed a prototype telescope system consisting of three small MAPS sensors arranged in three parallel and coaxial planes with a readout system based on the readout architecture for PIXEL. This proposed readout architecture is simple and scales to the size required to readout the final detector. The real-time hit finding algorithm necessary for data rate reduction in the 400 million pixel detector is described, and aspects of the PIXEL system integration into the existing STAR framework are addressed. The complete system has been recently tested and shown to be fully functional.

Szelezniak, Michal A.; Besson, Auguste; Colledani, Claude; Dorokhov, Andrei; Dulinski, Wojciech; Greiner, Leo C.; Himmi, Abdelkader; Hu, Christine; Matis, Howard S.; Ritter, Hans Georg; Rose, Andrew; Shabetai, Alexandre; Stezelberger, Thorsten; Sun, Xiangming; Thomas, Jim H.; Valin, Isabelle; Vu, Chinh Q.; Wieman, Howard H.; Winter, Marc

2008-10-01T23:59:59.000Z

18

Proposal for SPS beam time for the baby MIND and TASD neutrino detector prototypes  

E-Print Network [OSTI]

The design, construction and testing of neutrino detector prototypes at CERN are ongoing activities. This document reports on the design of solid state baby MIND and TASD detector prototypes and outlines requirements for a test beam at CERN to test these, tentatively planned on the H8 beamline in the North Area, which is equipped with a large aperture magnet. The current proposal is submitted to be considered in light of the recently approved projects related to neutrino activities with the SPS in the North Area in the medium term 2015-2020.

R. Asfandiyarov; R. Bayes; A. Blondel; M. Bogomilov; A. Bross; F. Cadoux; A. Cervera; A. Izmaylov; Y. Karadzhov; I. Karpikov; M. Khabibulin; A. Khotyantsev; A. Kopylov; Y. Kudenko; R. Matev; O. Mineev; Y. Musienko; M. Nessi; E. Noah; A. Rubbia; A. Shaykiev; P. Soler; R. Tsenov; G. Vankova-Kirilova; N. Yershov

2014-05-23T23:59:59.000Z

19

A Large Underground Liquid Argon Detector without a Cryostat? Kirk T McDonald (kirkmcd@princeton.edu)  

E-Print Network [OSTI]

/when they are to be used by people. The heat capacity of granite is about 800 J/kg-K, and its specific gravity is about 2.7, so its heat capacity per volume is about 2.16 MJ/m3 -K. The amount of energy required to coolA Large Underground Liquid Argon Detector without a Cryostat? Kirk T McDonald (kirkmcd

McDonald, Kirk

20

Precise 3D track reconstruction algorithm for the ICARUS T600 liquid argon time projection chamber detector  

E-Print Network [OSTI]

Liquid Argon Time Projection Chamber (LAr TPC) detectors offer charged particle imaging capability with remarkable spatial resolution. Precise event reconstruction procedures are critical in order to fully exploit the potential of this technology. In this paper we present a new, general approach of three-dimensional reconstruction for the LAr TPC with a practical application to track reconstruction. The efficiency of the method is evaluated on a sample of simulated tracks. We present also the application of the method to the analysis of real data tracks collected during the ICARUS T600 detector operation with the CNGS neutrino beam.

M. Antonello; B. Baibussinov; P. Benetti; E. Calligarich; N. Canci; S. Centro; A. Cesana; K. Cieslik; D. B. Cline; A. G. Cocco; A. Dabrowska; D. Dequal; A. Dermenev; R. Dolfini; C. Farnese; A. Fava; A. Ferrari; G. Fiorillo; D. Gibin; S. Gninenko; A. Guglielmi; M. Haranczyk; J. Holeczek; A. Ivashkin; J. Kisiel; I. Kochanek; J. Lagoda; S. Mania; A. Menegolli; G. Meng; C. Montanari; S. Otwinowski; A. Piazzoli; P. Picchi; F. Pietropaolo; P. Plonski; A. Rappoldi; G. L. Raselli; M. Rossella; C. Rubbia; P. Sala; A. Scaramelli; E. Segreto; F. Sergiampietri; D. Stefan; J. Stepaniak; R. Sulej; M. Szarska; M. Terrani; F. Varanini; S. Ventura; C. Vignoli; H. Wang; X. Yang; A. Zalewska; K. Zaremba

2012-10-18T23:59:59.000Z

Note: This page contains sample records for the topic "argon prototype detector" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

Beam Test Performance and Simulation of Prototypes for the ALICE Silicon Pixel Detector  

E-Print Network [OSTI]

The silicon pixel detector (SPD) of the ALICE experiment in preparation at the Large Hadron Collider (LHC) at CERN is designed to provide the precise vertex reconstruction needed for measuring heavy flavor production in heavy ion collisions at very high energies and high multiplicity. The SPD forms the innermost part of the Inner Tracking System (ITS) which also includes silicon drift and silicon strip detectors. Single assembly prototypes of the ALICE SPD have been tested at the CERN SPS using high energy proton/pion beams in 2002 and 2003. We report on the experimental determination of the spatial precision. We also report on the first combined beam test with prototypes of the other ITS silicon detector technologies at the CERN SPS in November 2004. The issue of SPD simulation is briefly discussed.

Jan Conrad

2005-11-07T23:59:59.000Z

22

Luminosity Measurement at ATLAS Development, Construction and Test of Scintillating Fibre Prototype Detectors  

E-Print Network [OSTI]

We are reporting about a scintillating fibre tracking detector which is proposed for the precise determination of the absolute luminosity of the CERN LHC at interaction point 1 where the ATLAS experiment is located. The detector needs to track protons elastically scattered under $\\mu$rad angles in direct vicinity to the LHC beam. It is based on square shaped scintillating plastic fibres read out by multi-anode photomultiplier tubes and is housed in Roman Pots. We describe the design and construction of prototype detectors and the results of a beam test experiment at DESY. The excellent detector performance established in this test validates the detector design and supports the feasibility of the proposed challenging method of luminosity measurement.

Ask, S; Braem, André; Cheiklali, C; Efthymiopoulos, I; Fournier, D; de La Taille, C; Di Girolamo, B; Grafström, P; Joram, C; Haguenauer, Maurice; Hedberg, V; Lavigne, B; Maio, A; Mapelli, A; Mjörnmark, U; Puzo, P; Rijssenbeek, M; Santos, J; Saraiva, J G; Stenzel, H; Thioye, M; Valladolid, E; Vorobel, V

2006-01-01T23:59:59.000Z

23

Monitoring the Thermal Power of Nuclear Reactors with a Prototype Cubic Meter Antineutrino Detector  

E-Print Network [OSTI]

In this paper, we estimate how quickly and how precisely a reactor's operational status and thermal power can be monitored over hour to month time scales, using the antineutrino rate as measured by a cubic meter scale detector. Our results are obtained from a detector we have deployed and operated at 25 meter standoff from a reactor core. This prototype can detect a prompt reactor shutdown within five hours, and monitor relative thermal power to three percent within seven days. Monitoring of short-term power changes in this way may be useful in the context of International Atomic Energy Agency's (IAEA) Reactor Safeguards Regime, or other cooperative monitoring regimes.

A. Bernstein; N. S. Bowden; A. Misner; T. Palmer

2008-04-30T23:59:59.000Z

24

The prototype of a detector for monitoring the cosmic radiation neutron flux on ground  

SciTech Connect (OSTI)

This work presents a comparison between the results of experimental tests and Monte Carlo simulations of the efficiency of a detector prototype for on-ground monitoring the cosmic radiation neutron flux. The experimental tests were made using one conventional {sup 241}Am-Be neutron source in several incidence angles and the results were compared to that ones obtained with a Monte Carlo simulation made with MCNPX Code.

Lelis Goncalez, Odair; Federico, Claudio Antonio; Mendes Prado, Adriane Cristina; Galhardo Vaz, Rafael; Tizziani Pazzianotto, Mauricio [Instituto de Estudos Avancados - IEAv/DCTA - Sao Jose dos Campos, SP (Brazil); Semmler, Renato [Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP - Sao Paulo, SP (Brazil)

2013-05-06T23:59:59.000Z

25

Identification of photons in double beta-decay experiments using segmented germanium detectors - studies with a GERDA Phase II prototype detector  

E-Print Network [OSTI]

The sensitivity of experiments searching for neutrinoless double beta-decay of germanium was so far limited by the background induced by external gamma-radiation. Segmented germanium detectors can be used to identify photons and thus reduce this background component. The GERmanium Detector Array, GERDA, will use highly segmented germanium detectors in its second phase. The identification of photonic events is investigated using a prototype detector. The results are compared with Monte Carlo data.

I. Abt; A. Caldwell; K. Kröninger; J. Liu; X. Liu; B. Majorovits

2007-01-04T23:59:59.000Z

26

Characterization of the first true coaxial 18-fold segmented n-type prototype detector for the GERDA project  

E-Print Network [OSTI]

The first true coaxial 18-fold segmented n-type HPGe prototype detector produced by Canberra-France for the GERDA neutrinoless double beta-decay project was tested both at Canberra-France and at the Max-Planck-Institut fuer Physik in Munich. The main characteristics of the detector are given and measurements concerning detector properties are described. A novel method to establish contacts between the crystal and a Kapton cable is presented.

I. Abt; A. Caldwell; D. Gutknecht; K. Kröninger; M. Lampert; X. Liu; B. Majorovits; D. Quirion; F. Stelzer; P. Wendling

2007-01-04T23:59:59.000Z

27

Prototype Radiation Detector Positioning System For The Automated Nondestructive Assay Of Uf6 Cylinders  

SciTech Connect (OSTI)

International Atomic Energy Agency (IAEA) inspectors currently perform periodic inspections at uranium enrichment plants to verify UF6 cylinder enrichment declarations. Measurements are typically performed with handheld high-resolution sensors on a sampling of cylinders taken to be representative of the facility’s entire cylinder inventory. These measurements are time-consuming, expensive, and assay only a small fraction of the total cylinder volume. An automated nondestructive assay system capable of providing enrichment measurements over the full volume of the cylinder could improve upon current verification practices in terms of efficiency and assay accuracy. This paper describes an approach denoted the Integrated Cylinder Verification Station (ICVS) that supports 100% cylinder verification, provides volume-averaged cylinder enrichment assay, and reduces inspector manpower needs. To allow field measurements to be collected to validate data collection algorithms, a prototype radiation detector positioning system was constructed. The system was designed to accurately position an array of radiation detectors along the length of a cylinder to measure UF6 enrichment. A number of alternative radiation shields for the detectors were included with the system. A collimated gamma-ray spectrometer module that allows translation of the detectors in the surrounding shielding to adjust the field of view, and a collimating plug in the end to further reduce the low-energy field of view, were also developed. Proof-of-principle measurements of neutron and high-energy gamma-ray signatures, using moderated neutron detectors and large-volume spectrometers in a fixed-geometry, portal-like configuration, supported an early assessment of the viability of the concept. The system has been used successfully on two testing campaigns at an AREVA fuel fabrication plant to scan over 30 product cylinders. This paper will describe the overall design of the detector positioning system and provide an overview of the Integrated Cylinder Verification Station (ICVS) approach.

Hatchell, Brian K.; Valdez, Patrick LJ; Orton, Christopher R.; Mace, Emily K.

2011-08-07T23:59:59.000Z

28

E-Print Network 3.0 - argon leak detector Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

in the NEMO experiment Summary: problem like very small leaks between the air-facility and the radon detector. On the average the amount... mixture, it has been necessary...

29

Cosmic ray velocity and electric charge measurements with the AMS/RICH detector: prototype results  

E-Print Network [OSTI]

The Alpha Magnetic Spectrometer (AMS) to be installed on the International Space Station (ISS) will measure charged cosmic ray spectra of elements up to iron, in the rigidity range from 1 GV to 1 TV, for at least three years. AMS is a large angular spectrometer composed of different subdetectors, including a proximity focusing Ring Imaging CHerenkov (RICH) detector. This will be equipped with a mixed radiator made of aerogel and sodium fluoride (NaF), a lateral conical mirror and a detection plane made of 680 photomultipliers coupled to light guides. The RICH detector allows measurements of particle's electric charge up to iron, and particle's velocity. Two possible methods for reconstructing the Cherenkov angle and the electric charge with the RICH will be discussed. A RICH prototype consisting of a detection matrix with 96 photomultipliers, a segment of a conical mirror and samples of the radiator materials was built and its performance was evaluated using ion beam data. Results from the last test beam perf...

Arruda, Luísa; Gonçalves, Patrícia; Pereira, Rui

2008-01-01T23:59:59.000Z

30

Cosmic ray velocity and electric charge measurements with the AMS/RICH detector: prototype results  

E-Print Network [OSTI]

The Alpha Magnetic Spectrometer (AMS) to be installed on the International Space Station (ISS) will measure charged cosmic ray spectra of elements up to iron, in the rigidity range from 1 GV to 1 TV, for at least three years. AMS is a large angular spectrometer composed of different subdetectors, including a proximity focusing Ring Imaging CHerenkov (RICH) detector. This will be equipped with a mixed radiator made of aerogel and sodium fluoride (NaF), a lateral conical mirror and a detection plane made of 680 photomultipliers coupled to light guides. The RICH detector allows measurements of particle's electric charge up to iron, and particle's velocity. Two possible methods for reconstructing the Cherenkov angle and the electric charge with the RICH will be discussed. A RICH prototype consisting of a detection matrix with 96 photomultipliers, a segment of a conical mirror and samples of the radiator materials was built and its performance was evaluated using ion beam data. Results from the last test beam performed with ion fragments resulting from the collision of a 158 GeV/c/nucleon primary beam of indium ions (CERN SPS) on a lead target are reported. The large amount of collected data allowed to test and characterize different aerogel samples and the NaF radiator. In addition, the reflectivity of the mirror was evaluated. The data analysis confirms the design goals.

Luísa Arruda; Fernando Barão; Patrícia Gonçalves; Rui Pereira

2008-01-31T23:59:59.000Z

31

Analysis of alpha backgrounds in the DEAP-1 detector  

E-Print Network [OSTI]

DEAP-1 is a 7 kg liquid argon dark matter detector used to prototype the tonne scale DEAP-3600 detector at SNOLAB.We present an analysis of the alpha particle backgrounds in DEAP-1 and isolate the radiations from various 222Rn daughters at various locations within the detector. The backgrounds will be removed by event position reconstruction and strict controls of material purity.

Kevin S. Olsen

2009-06-01T23:59:59.000Z

32

E-Print Network 3.0 - argon calorimeter commissioning Sample...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

argon calorimeter is now complete and integration with the ATLAS detector in the cavern... an accordion-geometry liquid argon (LAr) ... Source: Krieger, Peter - Department of...

33

E-Print Network 3.0 - argon calorimeter calibration Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

argon calorimeter is now complete and integration with the ATLAS detector in the cavern... an accordion-geometry liquid argon (LAr) electromagnetic ... Source: Krieger, Peter...

34

J-PET analysis framework for the prototype TOF-PET detector  

E-Print Network [OSTI]

Novel TOF-PET scanner solutions demand, apart from the state of the art detectors, software for fast processing of the gathered data, monitoring of the whole scanner and reconstruction of the PET image. In this article we present an analysis framework for the novel STRIP-PET scanner developed by the J-PET collaboration in the Institute of Physics of the Jagiellonian University. This software is based on the ROOT package used in many particle physics experiments.

Krzemie?, W; Stola, K; Trybek, D; Bednarski, T; Bia?as, P; Czerwi?ski, E; Kap?on, ?; Kochanowski, A; Korcyl, G; Kowal, J; Kowalski, P; Kozik, T; Molenda, M; Moskal, P; Nied?wiecki, Sz; Pa?ka, M; Pawlik, M; Raczy?ski, L; Rudy, Z; Salabura, P; Sharma, N G; S?omski, A; Smyrski, J; Strzelecki, A; Wi?licki, W; Zieli?ski, M; Zo?, N

2013-01-01T23:59:59.000Z

35

The Ring Imaging Cherenkov detector of the AMS experiment: test beam results with a prototype  

E-Print Network [OSTI]

The Alpha Magnetic Spectrometer (AMS) to be installed on the International Space Station (ISS) will be equipped with a proximity Ring Imaging Cherenkov (RICH) detector for measuring the velocity and electric charge of the charged cosmic particles. This detector will contribute to the high level of redundancy required for AMS as well as to the rejection of albedo particles. Charge separation up to iron and a velocity resolution of the order of 0.1% for singly charged particles are expected. A RICH protoptype consisting of a detection matrix with 96 photomultiplier units, a segment of a conical mirror and samples of the radiator materials was built and its performance was evaluated. Results from the last test beam performed with ion fragments resulting from the collision of a 158 GeV/c/nucleon primary beam of indium ions (CERN SPS) on a lead target are reported. The large amount of collected data allowed to test and characterize different aerogel samples and the sodium fluoride radiator. In addition, the reflec...

Arruda, Luísa; Goncalves, Patrícia; Pereira, Rui

2008-01-01T23:59:59.000Z

36

The Ring Imaging Cherenkov detector of the AMS experiment: test beam results with a prototype  

E-Print Network [OSTI]

The Alpha Magnetic Spectrometer (AMS) to be installed on the International Space Station (ISS) will be equipped with a proximity Ring Imaging Cherenkov (RICH) detector for measuring the velocity and electric charge of the charged cosmic particles. This detector will contribute to the high level of redundancy required for AMS as well as to the rejection of albedo particles. Charge separation up to iron and a velocity resolution of the order of 0.1% for singly charged particles are expected. A RICH protoptype consisting of a detection matrix with 96 photomultiplier units, a segment of a conical mirror and samples of the radiator materials was built and its performance was evaluated. Results from the last test beam performed with ion fragments resulting from the collision of a 158 GeV/c/nucleon primary beam of indium ions (CERN SPS) on a lead target are reported. The large amount of collected data allowed to test and characterize different aerogel samples and the sodium fluoride radiator. In addition, the reflectivity of the mirror was evaluated. The data analysis confirms the design goals.

Luísa Arruda; Fernando Barão; Patrícia Goncalves; Rui Pereira

2008-01-29T23:59:59.000Z

37

Oxygen contamination in liquid Argon: combined effects on ionization electron charge and scintillation light  

E-Print Network [OSTI]

A dedicated test of the effects of Oxygen contamination in liquid Argon has been performed at the INFN-Gran Sasso Laboratory (LNGS, Italy) within the WArP R&D program. Two detectors have been used: the WArP 2.3 lt prototype and a small (0.7 lt) dedicated detector, coupled with a system for the injection of controlled amounts of gaseous Oxygen. Purpose of the test with the 0.7 lt detector is to detect the reduction of the long-lived component lifetime of the Argon scintillation light emission at increasing O2 concentration. Data from the WArP prototype are used for determining the behavior of both the ionization electron lifetime and the scintillation long-lived component lifetime during the O2-purification process activated in closed loop during the acquisition run. The electron lifetime measurements allow to infer the O2 content of the Argon and correlate it with the long-lived scintillation lifetime data. The effect of Oxygen contamination on the scintillation light has been thus measured over a wide range of O2 concentration, spanning from about 10^-3 ppm up to about 10 ppm. The rate constant of the light quenching process induced by Oxygen in LAr has been found to be k'(O2)=0.54+-0.03 micros^-1 ppm^-1.

R. Acciarri; M. Antonello; B. Baibussinov; M. Baldo-Ceolin; P. Benetti; F. Calaprice; E. Calligarich; M. Cambiaghi; N. Canci; F. Carbonara; F. Cavanna; S. Centro; A. G. Cocco; F. Di Pompeo; G. Fiorillo; C. Galbiati; V. Gallo; L. Grandi; G. Meng; I. Modena; C. Montanari; O. Palamara; L. Pandola; F. Pietropaolo; G. L. Raselli; M. Roncadelli; M. Rossella; C. Rubbia; E. Segreto; A. M. Szelc; F. Tortorici; S. Ventura; C. Vignoli

2008-04-08T23:59:59.000Z

38

ICARUS and Status of Liquid Argon Technology  

E-Print Network [OSTI]

ICARUS is the largest liquid argon TPC detector ever built (~600 ton LAr mass). It operates underground at the LNGS laboratory in Gran Sasso. It has been smoothly running since summer 2010, collecting data with the CNGS beam and with cosmics. Liquid argon TPCs are really "electronic bubble chamber" providing a completely uniform imaging and calorimetry with unprecedented accuracy on massive volumes. ICARUS is internationally considered as a milestone towards the realization of the next generation of massive detectors (~tens of ktons) for neutrino and rare event physics. Results will be presented on the data collected during 2010 with the detector at LNGS.

Dorota Stefan

2011-10-07T23:59:59.000Z

39

Letter of Intent for a Study of a Liquid Argon Neutrino and Nucleon Decay Detector (LANNDD) of 100 kTon at DUSEL/Homestake  

E-Print Network [OSTI]

and Atlas detector operation at the LHC. Other problems such as the nature of dark energy and dark matter and Detection of Dark Matter and Dark Energy in the Universe, Marina Del Rey, California, 2005). Other equally now these areas of science have been dominated by the use of water Cherenkov detectors such as Super K

McDonald, Kirk

40

Detectors  

DOE Patents [OSTI]

The apparatus and method provide techniques through which both alpha and beta emission determinations can be made simultaneously using a simple detector structure. The technique uses a beta detector covered in an electrically conducting material, the electrically conducting material discharging ions generated by alpha emissions, and as a consequence providing a measure of those alpha emissions. The technique also offers improved mountings for alpha detectors and other forms of detectors against vibration and the consequential effects vibration has on measurement accuracy.

Orr, Christopher Henry (Calderbridge, GB); Luff, Craig Janson (Calderbridge, GB); Dockray, Thomas (Calderbridge, GB); Macarthur, Duncan Whittemore (Los Alamos, NM); Bounds, John Alan (Los Alamos, NM); Allander, Krag (Los Alamos, NM)

2002-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "argon prototype detector" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

Studies of a Liquid Argon Time Projection Chamber  

E-Print Network [OSTI]

, industrial- scale purification of argon to 0.1 ppb of O2. Here, we propose to undertake R&D on the two of these topics that can be addressed by a relatively small-scale effort: 1. Verification that a liquid argon phase could be studied. At this scale of detector, the best technology ­ a total absorption tracking

McDonald, Kirk

42

E-Print Network 3.0 - argon barrel calorimeter Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

argon calorimeter is now complete and integration with the ATLAS detector in the cavern... is composed of a barrel calorimeter (Fig. ... Source: Krieger, Peter - Department...

43

E-Print Network 3.0 - argon scintillation light Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

argon scintillation light Page: << < 1 2 3 4 5 > >> 1 Large Area Imaging Detector for Neutron Scattering Based on Boron-Rich Liquid Scintillator Summary: to a novel...

44

WOLTE_8 Abstract -Workshop on Low Temperature Electronics -June 22-25, 2008 CMOS Charge amplifier for liquid argon Time Projection Chamber detectors  

E-Print Network [OSTI]

. This is obtained by drifting at constant speed the electrons with a high intensity electric field. Two planarWOLTE_8 Abstract - Workshop on Low Temperature Electronics - June 22-25, 2008 CMOS Charge amplifier, on a system of wires at the sides of the detector, the electric charges from the ionization losses

Boyer, Edmond

45

Extreme argon purity in a large, non-evacuated cryostat  

SciTech Connect (OSTI)

Liquid Argon Time Projection Chambers (LArTPCs) show promise as scalable devices for the large detectors needed for long-baseline neutrino oscillation physics. Over the last several years at Fermilab a staged approach to developing the technology for large detectors has been developed. The TPC detectors require ultra-pure liquid argon with respect to electronegative contaminants such as oxygen and water. The tolerable electronegative contamination level may be as pure as 60 parts per trillion of oxygen. Three liquid argon cryostats operated at Fermilab have achieved the extreme purity required by TPCs. These three cryostats used evacuation to remove atmospheric contaminants as the first purification step prior to filling with liquid argon. Future physics experiments may require very large detectors with tens of kilotonnes of liquid argon mass. The capability to evacuate such large cryostats adds significant cost to the cryostat itself in addition to the cost of a large scale vacuum pumping system. This paper describes a 30 ton liquid argon cryostat at Fermilab which uses purging to remove atmospheric contaminants instead of evacuation as the first purification step. This cryostat has achieved electronegative contamination levels better than 60 parts per trillion of oxygen equivalent. The results of this liquid argon purity demonstration will strongly influence the design of future TPC cryostats.

Tope, Terry; Adamowski, Mark; Carls, B.; Hahn, A.; Jaskierny, W.; Jostlein, H.; Kendziora, C.; Lockwitz, S.; Pahlka, B.; Plunkett, R.; Pordes, S.; Rebel, B.; Schmitt, R.; Skup, E.; Stancari, M.; Yang, T. [Particle Physics Division, Fermilab, P.O. Box 500, Batavia, IL 60510 (United States)

2014-01-29T23:59:59.000Z

46

A steerable UV laser system for the calibration of liquid argon time projection chambers  

E-Print Network [OSTI]

A number of liquid argon time projection chambers (LAr TPC's) are being build or are proposed for neutrino experiments on long- and short baseline beams. For these detectors a distortion in the drift field due to geometrical or physics reasons can affect the reconstruction of the events. Depending on the TPC geometry and electric drift field intensity this distortion could be of the same magnitude as the drift field itself. Recently, we presented a method to calibrate the drift field and correct for these possible distortions. While straight cosmic ray muon tracks could be used for calibration, multiple coulomb scattering and momentum uncertainties allow only a limited resolution. A UV laser instead can create straight ionization tracks in liquid argon, and allows one to map the drift field along different paths in the TPC inner volume. Here we present a UV laser feed-through design with a steerable UV mirror immersed in liquid argon that can point the laser beam at many locations through the TPC. The straight ionization paths are sensitive to drift field distortions, a fit of these distortion to the linear optical path allows to extract the drift field, by using these laser tracks along the whole TPC volume one can obtain a 3D drift field map. The UV laser feed-through assembly is a prototype of the system that will be used for the MicroBooNE experiment at the Fermi National Accelerator Laboratory (FNAL).

A. Ereditato; I. Kreslo; M. Lüthi; C. Rudolf von Rohr; M. Schenk; T. Strauss; M. Weber; M. Zeller

2014-10-04T23:59:59.000Z

47

A Radiation-Hard Dual Channel 4-bit Pipeline for a 12-bit 40 MS/s ADC Prototype with extended Dynamic Range for the ATLAS Liquid Argon Calorimeter Readout Electronics Upgrade at the CERN LHC  

E-Print Network [OSTI]

The design of a radiation-hard dual channel 12-bit 40 MS/s pipeline ADC with extended dynamic range is presented, for use in the readout electronics upgrade for the ATLAS Liquid Argon Calorimeters at the CERN Large Hadron Collider. The design consists of two pipeline A/D channels with four Multiplying Digital-to-Analog Converters with nominal 12-bit resolution each. The design, fabricated in the IBM 130 nm CMOS process, shows a performance of 68 dB SNDR at 18 MHz for a single channel at 40 MS/s while consuming 55 mW/channel from a 2.5 V supply, and exhibits no performance degradation after irradiation. Various gain selection algorithms to achieve the extended dynamic range are implemented and tested.

Jayanth Kuppambatti; Jaroslav Ban; Timothy Andeen; Peter Kinget; Gustaaf Brooijmans

2013-07-31T23:59:59.000Z

48

IEEE TRIWSA~IONSON NUCLEAR SCIENCB,VOL. 47, NO. 3, JUNE 2000 1011 PerformanceResults of A PrototypeDepth-encoding PET Detector  

E-Print Network [OSTI]

Depth-encoding PET Detector L.J. Meng and D. Ramsden Department of Physics and Astronomy University of Southampton, Southampton, SO17 1BJ Abstract The results of a feasibility study for a high-resolution PET detector system simulation of the proposed small animal PET imager. I.INTRODUCTION It is well-known that a lack

He, Zhong

49

Prototype to Test WHY prototype to test  

E-Print Network [OSTI]

Prototype to Test METHOD WHY prototype to test HOW to prototype to test Prototyping to test or design space. The fundamental way you test your prototypes is by letting users experience them and react to them. In creating prototypes to test with users you have the opportunity to examine your solution

Prinz, Friedrich B.

50

E-Print Network 3.0 - argon 51 Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Off-axis Detector 5-40 5.1 Overview... arXiv:hep-ex0408121v124Aug2004 Letter of Intent FLARE Fermilab Liquid ARgon Experiments Version 1... Oscillations Studies with the Off-axis...

51

The Solar Argon Abundance  

E-Print Network [OSTI]

The solar argon abundance cannot be directly derived by spectroscopic observations of the solar photosphere. The solar Ar abundance is evaluated from solar wind measurements, nucleosynthetic arguments, observations of B stars, HII regions, planetary nebulae, and noble gas abundances measured in Jupiter's atmosphere. These data lead to a recommended argon abundance of N(Ar) = 91,200(+/-)23,700 (on a scale where Si = 10^6 atoms). The recommended abundance for the solar photosphere (on a scale where log N(H) = 12) is A(Ar)photo = 6.50(+/-)0.10, and taking element settling into account, the solar system (protosolar) abundance is A(Ar)solsys = 6.57(+/-)0.10.

Katharina Lodders

2007-10-24T23:59:59.000Z

52

FLARE, Fermilab Liquid Argon Experiments  

E-Print Network [OSTI]

Mature technology of Liquid Argon Time Projection Chambers in conjunction with intense neutrino beams constructed at Fermilab offer a broad program of neutrino physics for the next decade.

L. Bartoszek

2004-08-24T23:59:59.000Z

53

First measurement of the ionization yield of nuclear recoils in liquid argon  

SciTech Connect (OSTI)

Liquid phase argon has long been used as a target medium for particle detection via scintillation light. Recently there has been considerable interest in direct detection of both hypothetical darkmatter particles and coherent elastic neutrino nucleus scattering. These as-yet unobserved neutral particle interactions are expected to result in a recoiling argon atom O(keV), generally referred to in the literature as a nuclear recoil. This prompts the question of the available electromagnetic signal in a liquid argon detector. In this Letter we report the first measurement of the ionization yield (Qy), detected electrons per unit energy, resulting from nuclear recoils in liquid argon, measured at 6.7 keV. This is also the lowest energy measurement of nuclear recoils in liquid argon.

Joshi, T. [Univ. of California, Berkeley, CA (United States). Dept. of Nuclear Engineering; Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States); Sangiorgio, Samuele [Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States); Bernstein, A. [Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States); Foxe, Michael P. [Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States); Pennsylvania State Univ., University Park, PA (United States). Dept. of Mechanical and Nuclear Engineering; Hagmann, Chris [Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States); Jovanovic, Igor [Pennsylvania State Univ., University Park, PA (United States). Dept. of Mechanical and Nuclear Engineering; Kazkaz, K. [Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States); Mozin, Vladimir V. [Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States); Norman, E. B. [Univ. of California, Berkeley, CA (United States). Dept. of Nuclear Engineering; Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States); Pereverzev, S. V. [Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States); Rebassoo, Finn O. [Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States); Sorensen, Peter F. [Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

2014-05-01T23:59:59.000Z

54

MPACT Fast Neutron Multiplicity System Prototype Development  

SciTech Connect (OSTI)

This document serves as both an FY2103 End-of-Year and End-of-Project report on efforts that resulted in the design of a prototype fast neutron multiplicity counter leveraged upon the findings of previous project efforts. The prototype design includes 32 liquid scintillator detectors with cubic volumes 7.62 cm in dimension configured into 4 stacked rings of 8 detectors. Detector signal collection for the system is handled with a pair of Struck Innovative Systeme 16-channel digitizers controlled by in-house developed software with built-in multiplicity analysis algorithms. Initial testing and familiarization of the currently obtained prototype components is underway, however full prototype construction is required for further optimization. Monte Carlo models of the prototype system were performed to estimate die-away and efficiency values. Analysis of these models resulted in the development of a software package capable of determining the effects of nearest-neighbor rejection methods for elimination of detector cross talk. A parameter study was performed using previously developed analytical methods for the estimation of assay mass variance for use as a figure-of-merit for system performance. A software package was developed to automate these calculations and ensure accuracy. The results of the parameter study show that the prototype fast neutron multiplicity counter design is very nearly optimized under the restraints of the parameter space.

D.L. Chichester; S.A. Pozzi; J.L. Dolan; M.T. Kinlaw; S.J. Thompson; A.C. Kaplan; M. Flaska; A. Enqvist; J.T. Johnson; S.M. Watson

2013-09-01T23:59:59.000Z

55

The Upgraded D0 detector  

SciTech Connect (OSTI)

The D0 experiment enjoyed a very successful data-collection run at the Fermilab Tevatron collider between 1992 and 1996. Since then, the detector has been upgraded to take advantage of improvements to the Tevatron and to enhance its physics capabilities. We describe the new elements of the detector, including the silicon microstrip tracker, central fiber tracker, solenoidal magnet, preshower detectors, forward muon detector, and forward proton detector. The uranium/liquid-argon calorimeters and central muon detector, remaining from Run I, are discussed briefly. We also present the associated electronics, triggering, and data acquisition systems, along with the design and implementation of software specific to D0.

Abazov, V.M.; Abbott, B.; Abolins, M.; Acharya, B.S.; Adams, D.L.; Adams, M.; Adams, T.; Agelou, M.; Agram, J.-L.; Ahmed, S.N.; Ahn, S.H.; Ahsan, M.; Alexeev, G.D.; Alkhazov, G.; Alton, A.; Alverson, G.; Alves, G.A.; Anastasoaie, M.; Andeen, T.; Anderson, J.T.; Anderson, S.; /Buenos Aires U. /Rio de Janeiro, CBPF /Sao Paulo, IFT /Alberta U./Simon Fraser U. /York U., Canada /McGill U. /Beijing, Inst. High Energy Phys. /Hefei, CUST /Andes U., Bogota /Charles U. /Prague, Tech. U. /Prague, Inst. Phys. /San Francisco deQuito U. /Clermont-Ferrand U. /LPSC, Grenoble /Marseille, CPPM /Orsay, LAL /Paris U., VI-VII /DAPNIA, Saclay /Strasbourg, IReS; ,

2005-07-01T23:59:59.000Z

56

LBNO-DEMO: Large-scale neutrino detector demonstrators for phased performance assessment in view of a long-baseline oscillation experiment  

E-Print Network [OSTI]

In June 2012, an Expression of Interest for a long-baseline experiment (LBNO) has been submitted to the CERN SPSC. LBNO considers three types of neutrino detector technologies: a double-phase liquid argon (LAr) TPC and a magnetised iron detector as far detectors. For the near detector, a high-pressure gas TPC embedded in a calorimeter and a magnet is the baseline design. A mandatory milestone is a concrete prototyping effort towards the envisioned large-scale detectors, and an accompanying campaign of measurements aimed at assessing the detector associated systematic errors. The proposed $6\\times 6\\times 6$m$^3$ DLAr is an industrial prototype of the design discussed in the EoI and scalable to 20 kton or 50~kton. It is to be constructed and operated in a controlled laboratory and surface environment with test beam access, such as the CERN North Area (NA). Its successful operation and full characterisation will be a fundamental milestone, likely opening the path to an underground deployment of larger detectors. The response of the DLAr demonstrator will be measured and understood with an unprecedented precision in a charged particle test beam (0.5-20 GeV/c). The exposure will certify the assumptions and calibrate the response of the detector, and allow to develop and to benchmark sophisticated reconstruction algorithms, such as those of 3-dimensional tracking, particle ID and energy flow in liquid argon. All these steps are fundamental for validating the correctness of the physics performance described in the LBNO EoI.

L. Agostino; B. Andrieu; R. Asfandiyarov; D. Autiero; O. Bésida; F. Bay; R. Bayes; A. M. Blebea-Apostu; A. Blondel; M. Bogomilov; S. Bolognesi; S. Bordoni; A. Bravar; M. Buizza-Avanzini; F. Cadoux; D. Caiulo; M. Calin; M. Campanelli; C. Cantini; L. Chaussard; D. Chesneanu; N. Colino; P. Crivelli; I. De Bonis; Y. Déclais; J. Dawson; C. De La Taille; P. Del Amo Sanchez; A. Delbart; S. Di Luise; D. Duchesneau; F. Dulucq; J. Dumarchez; I. Efthymiopoulos; S. Emery; T. Enqvist; L. Epprecht; T. Esanu; D. Franco; D. Franco; M. Friend; V. Galymov; A. Gendotti; C. Giganti; I. Gil-Botella; M. C Gomoiu; P. Gorodetzky; A. Haesler; T. Hasegawa; S. Horikawa; M. Ieva; A. Jipa; Y. Karadzhov; I. Karpikov; A. Khotjantsev; A. Korzenev; D. Kryn; Y. Kudenko; P. Kuusiniemi; I. Lazanu; J. -M. Levy; K. Loo; T. Lux; J. Maalampi; R. M. Margineanu; J. Marteau; C. Martin; G. Martin-Chassard; E. Mazzucato; A. Mefodiev; O. Mineev; B. Mitrica; S. Murphy; T. Nakadaira; M. Nessi; K. Nikolics; L. Nita; E. Noah; P. Novella; G. A. Nuijten; T. Ovsiannikova; C. Palomares; T. Patzak; E. Pennacchio; L. Periale; H. Pessard; B. Popov; M. Ravonel; M. Rayner; C. Regenfus; C. Ristea; O. Ristea; A. Robert; A. Rubbia; K. Sakashita; F. Sanchez; R. Santorelli; E. Scantamburlo; F. Sergiampietri; D. Sgalaberna; M. Slupecki; F. J. P. Soler; D. L. Stanca; A. Tonazzo; W. H. Trzaska; R. Tsenov; G. Vankova-Kirilova; F. Vannucci; G. Vasseur; A. Verdugo; T. Viant; S. Wu; N. Yershov; L. Zambelli; M. Zito

2014-09-14T23:59:59.000Z

57

The ATLAS Liquid Argon Calorimeter: Construction, Integration, Commissioning  

SciTech Connect (OSTI)

The ATLAS liquid argon (LAr) calorimeter system consists of an electromagnetic barrel calorimeter and two end caps with electromagnetic, hadronic and forward calorimeters. The liquid argon sampling technique, with an accordion geometry was chosen for the barrel electromagnetic calorimeter (EMB) and adapted to the end cap (EMEC). The hadronic end cap calorimeter (HEC) uses a copper-liquid argon sampling technique with flat plate geometry and is subdivided in depth in two wheels per end-cap. Finally, the forward calorimeter (FCAL) is composed of three modules employing cylindrical electrodes with thin liquid argon gaps.The construction of the full calorimeter system is complete since mid-2004. Production modules constructed in the home institutes were integrated into wheels at CERN in 2003-2004, and inserted into the three cryostats. They passed their first complete cold test before the lowering into the ATLAS cavern. Results of quality checks (e.g. electrical, mechanical, ...) performed on all the 190304 read-out channels after cool down will be reported. End 2004 the ATLAS barrel electromagnetic (EM) calorimeter was installed in the ATLAS cavern and since summer 2005 the front-end electronics are being connected and tested. Results of this first commissioning phase will be shown to demonstrate the high standards of quality control for our detectors.

Aleksa, Martin [PH-Department, CERN, 1211 Geneva (Switzerland)

2006-10-27T23:59:59.000Z

58

E-Print Network 3.0 - atlas tilecal detector Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

argon calorimeter is now complete and integration with the ATLAS detector in the cavern... of steel and scintillating tile (TileCal). In the endcap region of the detector all...

59

The ATLAS Liquid Argon Calorimeter Construction, Integration, Commissioning and Performance from Selected Particle Beam Test Results  

E-Print Network [OSTI]

­Construction of the ATLAS liquid argon calorimeter is now complete and integration with the ATLAS detector in the cavern with the move of the barrel cryostat to the ATLAS cavern. Since then, integration of the endcap calorimeters, waiting to be lowered into the cavern. The other will be moved to Point 1 by late 2005 / early 2006

Krieger, Peter

60

Rapid prototyping of rapid prototyping machines  

E-Print Network [OSTI]

Rapid prototyping tools empower individuals to create almost anything. Unfortunately, these tools are still far too expensive for personal ownership. The do-it-yourself community has responded with a slew of home-made rapid ...

Moyer, Ilan Ellison

2008-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "argon prototype detector" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

Readiness of the ATLAS Liquid Argon Calorimeter for LHC Collisions  

E-Print Network [OSTI]

The ATLAS liquid argon calorimeter has been operating continuously since August 2006. At this time, only part of the calorimeter was readout, but since the beginning of 2008, all calorimeter cells have been connected to the ATLAS readout system in preparation for LHC collisions. This paper gives an overview of the liquid argon calorimeter performance measured in situ with random triggers, calibration data, cosmic muons, and LHC beam splash events. Results on the detector operation, timing performance, electronics noise, and gain stability are presented. High energy deposits from radiative cosmic muons and beam splash events allow to check the intrinsic constant term of the energy resolution. The uniformity of the electromagnetic barrel calorimeter response along eta (averaged over phi) is measured at the percent level using minimum ionizing cosmic muons. Finally, studies of electromagnetic showers from radiative muons have been used to cross-check the Monte Carlo simulation. The performance results obtained using the ATLAS readout, data acquisition, and reconstruction software indicate that the liquid argon calorimeter is well-prepared for collisions at the dawn of the LHC era.

The ATLAS Collaboration

2010-05-25T23:59:59.000Z

62

STAR Vertex Detector Upgrade Development  

SciTech Connect (OSTI)

We report on the development and prototyping efforts undertaken with the goal of producing a micro-vertex detector for the STAR experiment at the RHIC accelerator at BNL. We present the basic detector requirements and show a sensor development path, conceptual mechanical design candidates and readout architecture. Prototyping and beam test results with current generation MimoSTAR-2 sensors and a readout system featuring FPGA based on-the-fly hit finding and data sparsification are also presented.

Greiner, Leo C.; Matis, Howard S.; Stezelberger, Thorsten; Vu,Chinh Q.; Wieman, Howard; Szelezniak, Michal; Sun, Xiangming

2008-01-28T23:59:59.000Z

63

argon 32: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

a 1 ton liquid argon TPCCalorimeter, is designed for the detection of dark matter particles which can scatter off the spinless argon nucleus, producing nuclear recoils....

64

argon 33: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

a 1 ton liquid argon TPCCalorimeter, is designed for the detection of dark matter particles which can scatter off the spinless argon nucleus, producing nuclear recoils....

65

argon tpc detectors: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

J L;; Radeka, V;; Rudolph Von Rohr, Ch;; Smargianaki, D;; Soderberg, M;; Strauss, Th;; Weber, M;; Yu, B;; Zeller, G P;; Zeyrek, M 2015-01-01 6 Nucleon Decay Searches with large...

66

Large and Small (Far and Near) Liquid Argon Detectors  

E-Print Network [OSTI]

neutrino experiments Rich follow-up physics at accelerators and reactors. Parameter Atmos. Solar Accel;The Neutrino Horn Issue for Superbeams · 2-4 MW proton beams are achieved in BNL, CERN and FNAL). · = 1.4 g/cm3 , T = 89K at 1 atm., X0 = 14 cm, int = 80 cm. · A minimum ionizing particle yields 50

McDonald, Kirk

67

LArGe - Active background suppression using argon scintillation for the GERDA $0\  

E-Print Network [OSTI]

LArGe is a GERDA low-background test facility to study novel background suppression methods in a low-background environment, for future application in the GERDA experiment. Similar to GERDA, LArGe operates bare germanium detectors submersed into liquid argon (1 m$^3$, 1.4 tons), which in addition is instrumented with photomultipliers to detect argon scintillation light. The scintillation signals are used in anti-coincidence with the germanium detectors to effectively suppress background events that deposit energy in the liquid argon. The background suppression efficiency was studied in combination with a pulse shape discrimination (PSD) technique using a BEGe detector for various sources, which represent characteristic backgrounds to GERDA. Suppression factors of a few times $10^3$ have been achieved. First background data of LArGe with a coaxial HPGe detector (without PSD) yield a background index of (0.12$-$4.6)$\\cdot 10^{-2}$ cts/(keV$\\cdot$kg$\\cdot$y) (90% C.L.), which is at the level of GERDA Phase I. Fu...

Agostini, M; Budjáš, D; Cattadori, C; Gangapshev, A; Gusev, K; Heisel, M; Junker, M; Klimenko, A; Lubashevskiy, A; Pelczar, K; Schönert, S; Smolnikov, A; Zuzel, G

2015-01-01T23:59:59.000Z

68

A mobile antineutrino detector with plastic scintillators  

E-Print Network [OSTI]

We propose a new type segmented antineutrino detector made of plastic scintillators for the nuclear safeguard application. A small prototype was built and tested to measure background events. A satisfactory unmanned field operation of the detector system was demonstrated. Besides, a detailed Monte Carlo simulation code was developed to estimate the antineutrino detection efficiency of the detector.

Yasuhiro Kuroda; Shugo Oguri; Yo Kato; Ryoko Nakata; Yoshizumi Inoue; Chikara Ito; Makoto Minowa

2012-06-28T23:59:59.000Z

69

Construction and testing of a large scale prototype of a silicon tungsten electromagnetic calorimeter for a future lepton collider  

E-Print Network [OSTI]

The CALICE collaboration is preparing large scale prototypes of highly granular calorimeters for detectors to be operated at a future linear electron positron collider. After several beam campaigns at DESY, CERN and FNAL, the CALICE collaboration has demonstrated the principle of highly granular electromagnetic calorimeters with a first prototype called physics prototype. The next prototype, called technological prototype, addresses the engineering challenges which come along with the realisation of highly granular calorimeters. This prototype will comprise 30 layers where each layer is composed of four 9_9 cm2 silicon wafers. The front end electronics is integrated into the detector layers. The size of each pixel is 5_5 mm2. This prototype enter sits construction phase. We present results of the first layers of the technological prototype obtained during beam test campaigns in spring and summer 2012. According to these results the signal over noise ratio of the detector exceeds the R&D goal of10:1.

Rouëné,J

2013-01-01T23:59:59.000Z

70

Test and characterization of a new triple-GEM detector  

E-Print Network [OSTI]

In my thesis project, I provide a description of the entire process of materials preparation, assembly, testing, and characterization of several triple-GEM (Gas-Electron Multiplier) prototype detectors. GEM detectors ...

Burns, Laurie Davenport

2006-01-01T23:59:59.000Z

71

Development of a Focusing DIRC Detector for Particle Identification  

SciTech Connect (OSTI)

We have constructed a prototype Direct Ring Imaging ? Cerenkov (DIRC) detector in our optics lab to study its performance for identifying pions and kaons. This type of detector will be used for the Belle II experiment now under construction at the KEK laboratory in Japan. To test our prototype, we have constructed a cosmic ray telescope (CRT) that is able to trigger on and reconstruct cosmic ray tracks. We require that the tracks traverse the DIRC detector and study the resulting detector response.

Schwartz, Alan J. [University of Cincinnati] [University of Cincinnati

2014-03-16T23:59:59.000Z

72

MicroBooNE Detector Move  

ScienceCinema (OSTI)

On Monday, June 23, 2014 the MicroBooNE detector -- a 30-ton vessel that will be used to study ghostly particles called neutrinos -- was transported three miles across the Fermilab site and gently lowered into the laboratory's Liquid-Argon Test Facility. This video documents that move, some taken with time-lapse camerad, and shows the process of getting the MicroBooNE detector to its new home.

Flemming, Bonnie; Rameika, Gina

2014-07-15T23:59:59.000Z

73

argon compounds: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

and presents some first results. Christian Regenfus 2009-12-15 5 The Argon Dark Matter Experiment CERN Preprints Summary: The ArDM experiment, a 1 ton liquid argon TPC...

74

argon 31: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

discussed by the neutrino physics community. Rubbia, A 2013-01-01 5 The Argon Dark Matter Experiment HEP - Experiment (arXiv) Summary: The ArDM experiment, a 1 ton liquid argon...

75

argon 43: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

backgrounds, including beta decays of 39-Ar and 42-Ar in atmospheric argon. A dark matter search using a 2 kg argon target viewed by immersed photomultiplier tubes would allow...

76

argon 47: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

discussed by the neutrino physics community. Rubbia, A 2013-01-01 5 The Argon Dark Matter Experiment HEP - Experiment (arXiv) Summary: The ArDM experiment, a 1 ton liquid argon...

77

argon 36: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

and presents some first results. Christian Regenfus 2009-12-15 8 The Argon Dark Matter Experiment CERN Preprints Summary: The ArDM experiment, a 1 ton liquid argon TPC...

78

argon 35: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

discussed by the neutrino physics community. Rubbia, A 2013-01-01 4 The Argon Dark Matter Experiment HEP - Experiment (arXiv) Summary: The ArDM experiment, a 1 ton liquid argon...

79

actinica con argon: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

discussed by the neutrino physics community. Rubbia, A 2013-01-01 5 The Argon Dark Matter Experiment HEP - Experiment (arXiv) Summary: The ArDM experiment, a 1 ton liquid argon...

80

argon 39: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

atmospheric argon was an important step in the development of direct-detection dark matter experiments using argon as the active target. We report on the design and operation of...

Note: This page contains sample records for the topic "argon prototype detector" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

argon 38: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

discussed by the neutrino physics community. Rubbia, A 2013-01-01 6 The Argon Dark Matter Experiment HEP - Experiment (arXiv) Summary: The ArDM experiment, a 1 ton liquid argon...

82

argon plasma primera: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

the 39Ar content of the underground argon. Underground argon from the Kinder Morgan CO2 plant in Cortez, Colorado was determined to have less than 0.65% of the 39Ar activity in...

83

Majorana Thermosyphon Prototype Experimental Setup  

SciTech Connect (OSTI)

This report presents the experimental setup of Pacific Northwest National Laboratory’s MAJORANA DEMONSTRATOR thermosyphon prototype cooling system. A nitrogen thermosyphon prototype of such a system has been built and tested at PNNL. This document presents the experimental setup of the prototype that successfully demonstrated the heat transfer performance of the system.

Reid, Douglas J.; Guzman, Anthony D.; Munley, John T.

2011-08-01T23:59:59.000Z

84

The IPNS resonance detector spectrometer  

SciTech Connect (OSTI)

In the resonance detector method of neutron spectroscopy, a foil is placed in the scattered neutron beam and scattered neutrons having the resonance energy are detected by detecting the capture gammas resulting from the resonance absorption of the neutrons. A prototype resonance detector spectrometer called the Electron Volt Spectrometer (EVS) has been built and operated. The instrument is described, the current understanding of the background of the instrument is discussed, software developed to simulate the detector efficiency is described and compared with experimental results, and a test of the use of foil-thickness difference techniques to improve resolution is presented. (LEW)

Crawford, R.K.

1986-01-01T23:59:59.000Z

85

Diamond film growth argon-carbon plasmas  

DOE Patents [OSTI]

A method and system are disclosed for manufacturing diamond film. The method involves forming a carbonaceous vapor, providing a gas stream of argon, hydrogen and hydrocarbon and combining the gas with the carbonaceous vapor, passing the combined carbonaceous vapor and gas carrier stream into a chamber, forming a plasma in the chamber causing fragmentation of the carbonaceous and deposition of a diamond film on a substrate. 29 figs.

Gruen, D.M.; Krauss, A.R.; Liu, S.Z.; Pan, X.Z.; Zuiker, C.D.

1998-12-15T23:59:59.000Z

86

Performance of ALICE pixel prototypes in high energy beams  

E-Print Network [OSTI]

The two innermost layers of the ALICE inner tracking system are instrumented with silicon pixel detectors. Single chip assembly prototypes of the ALICE pixels have been tested in high energy particle beams at the CERN SPS. Detection efficiency and spatial precision have been studied as a function of the threshold and the track incidence angle. The experimental method, data analysis and main results are presented.

D. Elia

2005-12-20T23:59:59.000Z

87

A system to test the effects of materials on the electron drift lifetime in liquid argon and observations on the effect of water  

SciTech Connect (OSTI)

A materials test system (MTS) has been developed at FNAL to assess the suitability of materials for use in a large liquid argon time projection chamber. During development of the MTS, it was noted that controlling the cryostat pressure with a 'raining' condenser reduced the electron drift lifetime in the liquid argon. The effect of condensing has been investigated using a series of passive materials to filter the condensate. We report the results of these studies and of tests on different candidate materials for detector construction. The inferred reduction of electron drift lifetime by water concentrations in the parts per trillion is of particular interest.

Andrews, R.; Jaskierny, W.; Jostlein, H.; Kendziora, C.; Pordes, S.; Tope, T.; /Fermilab; ,

2009-07-01T23:59:59.000Z

88

Monitoring and data quality assessment of the ATLAS liquid argon calorimeter  

E-Print Network [OSTI]

The liquid argon calorimeter is a key component of the ATLAS detector installed at the CERN Large Hadron Collider. The primary purpose of this calorimeter is the measurement of electrons and photons. It also provides a crucial input for measuring jets and missing transverse momentum. An advanced data monitoring procedure was designed to quickly identify issues that would affect detector performance and ensure that only the best quality data are used for physics analysis. This article presents the validation procedure developed during the 2011 and 2012 LHC data taking periods, in which more than 98% of the proton proton luminosity recorded by ATLAS at a centre-of-mass energy of 7 and 8 TeV had calorimeter data quality suitable for physics analysis.

ATLAS Collaboration

2014-07-24T23:59:59.000Z

89

alice hmpid detector: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

for the ALICE HMPID prototypes CERN Preprints Summary: The ALICE HMPID RICH detector is equipped with CsI photocathodes in a MWPC for the detection of Cherenkov photons....

90

A prototype station for ARIANNA: a detector for cosmic neutrinos  

E-Print Network [OSTI]

the tower structure and solar panels. The main electronicsis provided by four 30-Watt solar panels. In the winter, aaway. The antennas, four solar panels, a wind generator and

Gerhardt, L.

2010-01-01T23:59:59.000Z

91

A prototype station for ARIANNA: a detector for cosmic neutrinos  

E-Print Network [OSTI]

with an eye to using a wind generator to power the stationthe winter, a Forgen 1000LT wind generator will provide somefour solar panels, a wind generator and an anemometer are

Gerhardt, L.

2010-01-01T23:59:59.000Z

92

A prototype station for ARIANNA: a detector for cosmic neutrinos  

E-Print Network [OSTI]

showing the tower structure and solar panels. The mainwhite to minimize solar heating. The towers are stabilizedsolar panels, a wind generator and an anemometer are mounted on a square tower

Gerhardt, L.

2010-01-01T23:59:59.000Z

93

argon dark matter: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

argon dark matter First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 The Argon Dark Matter Experiment HEP...

94

Rapid prototyping of green composites  

E-Print Network [OSTI]

Rapid prototyping employs digital fabrication techniques to quickly manufacture parts. However, the available materials are not yet suitable for making strong, large or durable objects. Composites are materials which are ...

Peek, Nadya (Nadya Meile)

2010-01-01T23:59:59.000Z

95

E-Print Network 3.0 - argon method Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

39.95 AMU Synonyms Argon-40 * Argon (ACGIH... -contained breathing apparatus, rubber boots, and heavy rubber gloves. METHODS ... Source: Choi, Kyu Yong - Department of Chemical...

96

E-Print Network 3.0 - argon plasma atomic Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

importance. A recent study of kineticsand decayprocesses in argon has shown that the 4s atomic... of an argon plasma by transient visible absorption spectroscopy from...

97

E-Print Network 3.0 - argon chlorides Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

and 266 nm photoreaction of acetyl chloride in xenon and argon... matrixes. Experimental Section Neat and argon matrix-isolated thin films of acid chlorides are deposited... -gas...

98

E-Print Network 3.0 - argon metastable number Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

concentrations of argon metastable atoms... by a standard optical source (argon Philips lamp), and able to be absorbed by the ... Source: Ecole Polytechnique, Centre de...

99

Effect of Emergency Argon on FCF Operational Incidents  

SciTech Connect (OSTI)

The following report presents analyses of operational incidents which are considered in the safety analysis of the FCF argon cell and the effect that the operability of the emergency argon system has on the course of these incidents. The purpose of this study is to determine if the emergency argon system makes a significant difference in ameliorating the course of these incidents. Six incidents were considered. The following three incidents were analyzed. These are: 1. Cooling failing on 2. Vacuum Pump Failing on 3. Argon Supplies Failing on. In the remaining three incidents, the emergency argon supply would have no effect on the course of these transients since it would not come on during these incidents. The transients are 1. Loss of Cooling 2. Loss of power (Differs from above by startup delay till the Diesel Generators come on.) 3. Cell rupture due to an earthquake or other cause. The analyses of the first three incidents are reported on in the next three sections. This report is issued realizing the control parameters used may not be optimum, and additional modeling must be done to model the inertia of refrigeration system, but the major conclusion concerning the need for the emergency argon system is still valid. The timing of some events may change with a more accurate model but the differences between the transients with and without emergency argon will remain the same. Some of the parameters assumed in the analyses are Makeup argon supply, 18 cfm, initiates when pressure is = -6 iwg., shuts off when pressure is = -3.1 iwg. 170,000 ft3 supply. Min 1/7th always available, can be cross connected to HFEF argon supply dewar. Emergency argon supply, 900 cfm, initiates when pressure is = -8 iwg. shuts off when pressure is =-4 iwg. reservoir 220 ft3, refilled when tank farm pressure reduces to 1050 psi which is about 110 ft3.

Charles Solbrig

2011-12-01T23:59:59.000Z

100

The ATLAS Liquid Argon Electromagnetic Calorimeter 1  

E-Print Network [OSTI]

high energy physics detector with a verylarge discovery potential for new physics such as Higgs bosons for example in the decay channels of Higgs boson: H! and H! eeee. The EM calorimeter 4] is divided in two

Boyer, Edmond

Note: This page contains sample records for the topic "argon prototype detector" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

High pressure argon ionization chamber systems for the measurement of environmental radiation exposure rates  

E-Print Network [OSTI]

High pressure argon ionization chamber systems for the measurement of environmental radiation exposure rates

DeCampo, J A; Raft, P D

1972-01-01T23:59:59.000Z

102

Energy loss characteristics of heavy ions in nitrogen, carbon dioxide, argon, hydrocarbon gases and tradescantia tissue  

E-Print Network [OSTI]

Energy loss characteristics of heavy ions in nitrogen, carbon dioxide, argon, hydrocarbon gases and tradescantia tissue

Dennis, J A

1971-01-01T23:59:59.000Z

103

argon beam coagulation: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

O. Palamara; K. Partyka; G. Rameika; B. Rebel; M. Soderberg; J. Spitz; A. M. Szelc; M. Weber; T. Yang; G. P. Zeller 2014-04-18 7 Hadronic calibration of the ATLAS liquid argon...

104

argon charge imaging: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

A. Patch; G. Rameika; B. Rebel; B. Rossi; M. Soderberg; J. Spitz; A. M. Szelc; M. Weber; T. Yang; G. Zeller 2011-11-01 7 ArgoNeuT and the Neutrino-Argon Charged Current...

105

argon 40 target: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

6 JOURNAL DE PHYSIQUE CoZZoque CY, suppZ6ment au n07, Tome 40, JuiZZet 1979, page C7-33 TIME DEPENDENCEOF CATAPHORESISIN A NEON-ARGON MIXTURE. Physics Websites Summary:...

106

argon 50: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Preprints Summary: DarkSide (DS) at Gran Sasso underground laboratory is a direct dark matter search program based on TPCs with liquid argon from underground sources. The DS-50...

107

argon 45: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Preprints Summary: DarkSide (DS) at Gran Sasso underground laboratory is a direct dark matter search program based on TPCs with liquid argon from underground sources. The DS-50...

108

Measurement of the elastic scattering cross section of neutrons from argon and neon  

E-Print Network [OSTI]

Background: The most significant source of background in direct dark matter searches are neutrons that scatter elastically from nuclei in the detector's sensitive volume. Experimental data for the elastic scattering cross section of neutrons from argon and neon, which are target materials of interest to the dark matter community, were previously unavailable. Purpose: Measure the differential cross section for elastic scattering of neutrons from argon and neon in the energy range relevant to backgrounds from (alpha,n) reactions in direct dark matter searches. Method: Cross-section data were taken at the Triangle Universities Nuclear Laboratory (TUNL) using the neutron time-of-flight technique. These data were fit using the spherical optical model. Results: The differential cross section for elastic scatting of neutrons from neon at 5.0 and 8.0 MeV and argon at 6.0 MeV was measured. Optical-model parameters for the elastic scattering reactions were determined from the best fit to these data. The total elastic scattering cross section for neon was found to differ by 6% at 5.0 MeV and 13% at 8.0 MeV from global optical-model predictions. Compared to a local optical-model for 40Ar, the elastic scattering cross section was found to differ from the data by 8% at 6.0 MeV. Conclusions: These new data are important for improving Monte-Carlo simulations and background estimates for direct dark matter searches and for benchmarking optical models of neutron elastic scattering from these nuclei.

S. MacMullin; M. Kidd; R. Henning; W. Tornow; C. R. Howell; M. Brown

2012-12-12T23:59:59.000Z

109

Characterization of a Spherical Proportional Counter in argon-based mixtures  

E-Print Network [OSTI]

The Spherical Proportional Counter is a novel type of radiation detector, with a low energy threshold (typically below 100 eV) and good energy resolution. This detector is being developed by the network NEWS, which includes several applications. We can name between many others Dark Matter searches, low level radon and neutron counting or low energy neutrino detection from supernovas or nuclear reactors via neutrino-nucleus elastic scattering. In this context, this works will present the characterization of a spherical detector of 1 meter diameter using two argon-based mixtures (with methane and isobutane) and for gas pressures between 50 and 1250 mbar. In each case, the energy resolution shows its best value in a wide range of gains, limited by the ballistic effect at low gains and by ion-backflow at high gains. Moreover, the best energy resolution shows a degradation with pressure. These effects will be discussed in terms of gas avalanche properties. Finally, the effect of an electrical field corrector in the homogenity of the gain and the energy threshold measured in our setup will be also discussed.

F. J. Iguaz; A. Rodriguez; J. F. Castel; I. G. Irastorza

2015-01-07T23:59:59.000Z

110

Characterization of a Spherical Proportional Counter in argon-based mixtures  

E-Print Network [OSTI]

The Spherical Proportional Counter is a novel type of radiation detector, with a low energy threshold (typically below 100 eV) and good energy resolution. This detector is being developed by the network NEWS, which includes several applications. We can name between many others Dark Matter searches, low level radon and neutron counting or low energy neutrino detection from supernovas or nuclear reactors via neutrino-nucleus elastic scattering. In this context, this works will present the characterization of a spherical detector of 1 meter diameter using two argon-based mixtures (with methane and isobutane) and for gas pressures between 50 and 1250 mbar. In each case, the energy resolution shows its best value in a wide range of gains, limited by the ballistic effect at low gains and by ion-backflow at high gains. Moreover, the best energy resolution shows a degradation with pressure. These effects will be discussed in terms of gas avalanche properties. Finally, the effect of an electrical field corrector in th...

Iguaz, F J; Castel, J F; Irastorza, I G

2015-01-01T23:59:59.000Z

111

BEAM COUPLING IMPEDANCE STUDIES ON THE LHC FP420 MULTI-POCKET BEAM PIPE PROTOTYPE  

E-Print Network [OSTI]

BEAM COUPLING IMPEDANCE STUDIES ON THE LHC FP420 MULTI-POCKET BEAM PIPE PROTOTYPE F. Roncarolo , R LHC beam pipe in which two pockets hosting the detectors introduce an abrupt cross-section variation of the pipe. During the FP420 proposed operation, each station is moved towards the beam as close as 5 mm ( 15

112

Test report -- Prototype core sampler  

SciTech Connect (OSTI)

The purpose of this test is to determine the adequacy of the prototype sampler, provided to Westinghouse Hanford Company (WHC) by DOE-RL. The sampler was fabricated for DOE-RL by the Concord Company by request of DOE-RL. This prototype sampler was introduced as a technology that can be easily deployed (similar to the current auger system) and will reliably collect representative samples. The sampler is similar to the Universal Sampler i.e., smooth core barrel and piston with an O-ring seal, but lacks a rotary valve near the throat of the sampler. This makes the sampler inappropriate for liquid sampling, but reduces the outside diameter of the sampler considerably, which should improve sample recovery. Recovery testing was performed with the supplied sampler in three different consistencies of Kaolin sludge simulants.

Linschooten, C.G.

1995-01-17T23:59:59.000Z

113

MS Detectors  

SciTech Connect (OSTI)

Good eyesight is often taken for granted, a situation that everyone appreciates once vision begins to fade with age. New eyeglasses or contact lenses are traditional ways to improve vision, but recent new technology, i.e. LASIK laser eye surgery, provides a new and exciting means for marked vision restoration and improvement. In mass spectrometry, detectors are the 'eyes' of the MS instrument. These 'eyes' have also been taken for granted. New detectors and new technologies are likewise needed to correct, improve, and extend ion detection and hence, our 'chemical vision'. The purpose of this report is to review and assess current MS detector technology and to provide a glimpse towards future detector technologies. It is hoped that the report will also serve to motivate interest, prompt ideas, and inspire new visions for ion detection research.

Koppenaal, David W.; Barinaga, Charles J.; Denton, M Bonner B.; Sperline, Roger P.; Hieftje, Gary M.; Schilling, G. D.; Andrade, Francisco J.; Barnes IV., James H.

2005-11-01T23:59:59.000Z

114

Arduino: An Open Electronics Prototyping Platform  

E-Print Network [OSTI]

Arduino: An Open Electronics Prototyping Platform Abstract Arduino is a platform for prototyping and library for writing code to control the board. Arduino comes from a philosophy of learning by doing the Arduino prototyping platform. This paper discusses related work, the educational and design context within

Herr, Hugh

115

Characteristics of Knock in Hydrogen-Oxygen-Argon SI Engine  

SciTech Connect (OSTI)

A promising approach for improving the efficiency of internal combustion engines is to employ a working fluid with a high specific heat ratio such as the noble gas argon. Moreover, all harmful emissions are eliminated when the intake charge is composed of oxygen, nonreactive argon, and hydrogen fuel. Previous research demonstrated indicated thermal efficiencies greater than 45% at 5.5 compression ratio in engines operating with hydrogen, oxygen, and argon. However, knock limits spark advance and increasing the efficiency further. Conditions under which knock occurs in such engines differs from typical gasoline fueled engines. In-cylinder temperatures using hydrogen-oxygen-argon are higher due to the high specific heat ratio and pressures are lower because of the low compression ratio. Better understanding of knock under these conditions can lead to operating strategies that inhibit knock and allow operation closer to the knock limit. In this work we compare knock with a hydrogen, oxygen, and argon mixture to that of air-gasoline mixtures in a variable compression ratio cooperative fuels research (CFR) engine. The focus is on stability of knocking phenomena, as well as, amplitude and frequency of the resulting pressure waves.

Killingsworth, N; Rapp, V; Flowers, D; Aceves, S; Chen, J; Dibble, R

2010-02-23T23:59:59.000Z

116

Microwave detector  

DOE Patents [OSTI]

A microwave detector (10) is provided for measuring the envelope shape of a microwave pulse comprised of high-frequency oscillations. A biased ferrite (26, 28) produces a magnetization field flux that links a B-dot loop (16, 20). The magnetic field of the microwave pulse participates in the formation of the magnetization field flux. High-frequency insensitive means (18, 22) are provided for measuring electric voltage or current induced in the B-dot loop. The recorded output of the detector is proportional to the time derivative of the square of the envelope shape of the microwave pulse.

Meldner, Heiner W. (Moss Beach, CA); Cusson, Ronald Y. (Chapel Hill, NC); Johnson, Ray M. (San Ramon, CA)

1986-01-01T23:59:59.000Z

117

Microwave detector  

DOE Patents [OSTI]

A microwave detector is provided for measuring the envelope shape of a microwave pulse comprised of high-frequency oscillations. A biased ferrite produces a magnetization field flux that links a B-dot loop. The magnetic field of the microwave pulse participates in the formation of the magnetization field flux. High-frequency insensitive means are provided for measuring electric voltage or current induced in the B-dot loop. The recorded output of the detector is proportional to the time derivative of the square of the envelope shape of the microwave pulse.

Meldner, H.W.; Cusson, R.Y.; Johnson, R.M.

1985-02-08T23:59:59.000Z

118

E-Print Network 3.0 - argon 52 Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

. . . . . . . 5-41 5.3 Liquid argon... arXiv:hep-ex0408121v124Aug2004 Letter of Intent FLARE Fermilab Liquid ARgon Experiments Version 1... Oscillations Studies with the Off-axis...

119

E-Print Network 3.0 - argon 53 Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

. . . . . . . 5-41 5.3 Liquid argon... arXiv:hep-ex0408121v124Aug2004 Letter of Intent FLARE Fermilab Liquid ARgon Experiments Version 1... Oscillations Studies with the Off-axis...

120

E-Print Network 3.0 - argon 40 beams Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

beams Search Powered by Explorit Topic List Advanced Search Sample search results for: argon 40 beams Page: << < 1 2 3 4 5 > >> 1 Large and Small (Far and Near) Liquid Argon...

Note: This page contains sample records for the topic "argon prototype detector" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

E-Print Network 3.0 - argon 38 beams Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

beams Search Powered by Explorit Topic List Advanced Search Sample search results for: argon 38 beams Page: << < 1 2 3 4 5 > >> 1 Studies of a Liquid Argon Time Projection Chamber...

122

E-Print Network 3.0 - argon 39 beams Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

beams Search Powered by Explorit Topic List Advanced Search Sample search results for: argon 39 beams Page: << < 1 2 3 4 5 > >> 1 Large and Small (Far and Near) Liquid Argon...

123

E-Print Network 3.0 - argon large electron Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

by minerals or "excess argon." The K-Ar dating technique was one of the earliest isotope... an absolute method such as a McLeod gauge to measure argon concentrations. The...

124

E-Print Network 3.0 - argon carrier gas Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Using a Sensitized Summary: here utilizes a commercial PID, equipped with an argon lamp (11.7 eV), in gas chromatography to detect... argon indirectly by the effect it has on...

125

Plasma Panel Based Radiation Detectors  

SciTech Connect (OSTI)

The plasma panel sensor (PPS) is a gaseous micropattern radiation detector under current development. It has many operational and fabrication principles common to plasma display panels (PDPs). It comprises a dense matrix of small, gas plasma discharge cells within a hermetically sealed panel. As in PDPs, it uses non-reactive, intrinsically radiation-hard materials such as glass substrates, refractory metal electrodes, and mostly inert gas mixtures. We are developing these devices primarily as thin, low-mass detectors with gas gaps from a few hundred microns to a few millimeters. The PPS is a high gain, inherently digital device with the potential for fast response times, fine position resolution (< 50 m RMS) and low cost. In this paper we report here on prototype PPS experimental results in detecting betas, protons and cosmic muons, and we extrapolate on the PPS potential for applications including detection of alphas, heavy-ions at low to medium energy, thermal neutrons and X-rays.

Friedman, Dr. Peter S. [Integrated Sensors, LLC; Varner Jr, Robert L [ORNL; Ball, Robert [University of Michigan; Beene, James R [ORNL; Ben Moshe, M. [Tel Aviv University; Benhammou, Yan [Tel Aviv University; Chapman, J. Wehrley [University of Michigan; Etzion, E [Tel Aviv University; Ferretti, Claudio [University of Michigan; Bentefour, E [Ion Beam Applications; Levin, Daniel S. [University of Michigan; Moshe, M. [Tel Aviv University; Silver, Yiftah [Tel Aviv University; Weaverdyck, Curtis [University of Michigan; Zhou, Bing [University of Michigan

2013-01-01T23:59:59.000Z

126

Implementation of an ASIC for Detector Instrumentation in Nuclear Physics Applications   

E-Print Network [OSTI]

A prototype ASIC (EFT1) for silicon strip detector instrumentation has been designed and tested. The ASIC design contains the electronics necessary for preamplification, shaping, hit detection, and data readout control.The ...

McIntosh, James Alexander

1996-01-01T23:59:59.000Z

127

E-Print Network 3.0 - agata asymmetric detector Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

just one scan 3 CLASP Challenge Led Knowledge Exchange call to meet Challenges Summary: brand new, cutting edge detector systems, ProSPECTus is now building a prototype SPECT...

128

ardm argon dark: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 The Argon Dark Matter Experiment (ArDM) HEP - Experiment (arXiv) Summary: The ArDM experiment, a 1 ton...

129

Kinetics of Silicothermic Reduction of Calcined Dolomite in Flowing Argon  

E-Print Network [OSTI]

of Experimental Rig De oxi dat ion Fu rn ac e TC TC Copper Turning Reduction Furnace Argon Gas Condenser Gas wash. Disadvantages: high impurity, high condenser area #12;© Swinburne University of Technology Aim of the project the fundamental physical chemistry Thermodynamic modelling Kinetic analysis High temperature experiments

Liley, David

130

argon calorimeters construction: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

argon calorimeters construction First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 STATUS OF THE...

131

Neutron detector  

DOE Patents [OSTI]

A neutron detector has a volume of neutron moderating material and a plurality of individual neutron sensing elements dispersed at selected locations throughout the moderator, and particularly arranged so that some of the detecting elements are closer to the surface of the moderator assembly and others are more deeply embedded. The arrangement captures some thermalized neutrons that might otherwise be scattered away from a single, centrally located detector element. Different geometrical arrangements may be used while preserving its fundamental characteristics. Different types of neutron sensing elements may be used, which may operate on any of a number of physical principles to perform the function of sensing a neutron, either by a capture or a scattering reaction, and converting that reaction to a detectable signal. High detection efficiency, an ability to acquire spectral information, and directional sensitivity may be obtained.

Stephan, Andrew C. (Knoxville, TN); Jardret; Vincent D. (Powell, TN)

2011-04-05T23:59:59.000Z

132

argon-nitrogen avalanche detectors: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

neutrino experiment, carried out by an international collaboration in Japan. First, operation principle of the MAPD, definitions of various parameters and measurement methods...

133

Computer Note A Prototype Object Database for  

E-Print Network [OSTI]

Computer Note A Prototype Object Database for Mitochondrial DNA Variation J. E. NEIGEL AND P preserved. We hope to prevent further loss by establishing a community database for population genetic surveys. We explored the feasibility of a population genetics database by developing a prototype

Neigel, Joseph E.

134

Study of the interactions of pions in the CALICE silicon-tungsten calorimeter prototype  

E-Print Network [OSTI]

A prototype silicon-tungsten electromagnetic calorimeter for an ILC detector was tested in 2007 at the CERN SPS test beam. Data were collected with electron and hadron beams in the energy range 8 to 80 GeV. The analysis described here focuses on the interactions of pions in the calorimeter. One of the main objectives of the CALICE program is to validate the Monte Carlo tools available for the design of a full-sized detector. The interactions of pions in the Si-W calorimeter are therefore confronted with the predictions of various physical models implemented in the GEANT4 simulation framework.

C. Adloff; Y. Karyotakis; J. Repond; J. Yu; G. Eigen; Y. Mikami; N. K. Watson; J. A. Wilson; T. Goto; G. Mavromanolakis; M. A. Thomson; D. R. Ward; W. Yan; D. Benchekroun; A. Hoummada; Y. Khoulaki; J. Apostolakis; A. Ribon; V. Uzhinskiy; M. Benyamna; C. Cârloganu; F. Fehr; P. Gay; G. C. Blazey; D. Chakraborty; A. Dyshkant; K. Francis; D. Hedin; J. G. Lima; V. Zutshi; J. -Y. Hostachy; K. Krastev; L. Morin; N. D'Ascenzo; U. Cornett; D. David; R. Fabbri; G. Falley; K. Gadow; E. Garutti; P. Göttlicher; T. Jung; S. Karstensen; A. -I. Lucaci-Timoce; B. Lutz; N. Meyer; V. Morgunov; M. Reinecke; F. Sefkow; P. Smirnov; A. Vargas-Trevino; N. Wattimena; O. Wendt; N. Feege; M. Groll; J. Haller; R. -D. Heuer; S. Morozov; S. Richter; J. Samson; A. Kaplan; H. -Ch. Schultz-Coulon; W. Shen; A. Tadday; B. Bilki; E. Norbeck; Y. Onel; E. J. Kim; G. Kim; D-W. Kim; K. Lee; S. C. Lee; K. Kawagoe; Y. Tamura; P. D. Dauncey; A. -M. Magnan; H. Yilmaz; O. Zorba; V. Bartsch; M. Postranecky; M. Warren; M. Wing; M. G. Green; F. Salvatore; M. Bedjidian; R. Kieffer; I. Laktineh; M. -C. Fouz; D. S. Bailey; R. J. Barlow; M. Kelly; R. J. Thompson; M. Danilov; E. Tarkovsky; N. Baranova; D. Karmanov; M. Korolev; M. Merkin; A. Voronin; A. Frey; S. Lu; K. Seidel; F. Simon; C. Soldner; L. Weuste; J. Bonis; B. Bouquet; S. Callier; P. Cornebise; Ph. Doublet; M. Faucci Giannelli; J. Fleury; H. Li; G. Martin-Chassard; F. Richard; Ch. de la Taille; R. Poeschl; L. Raux; N. Seguin-Moreau; F. Wicek; M. Anduze; V. Boudry; J-C. Brient; G. Gaycken; D. Jeans; P. Mora de Freitas; G. Musat; M. Reinhard; A. Rougé; M. Ruan; J-Ch. Vanel; H. Videau; K-H. Park; J. Zacek; J. Cvach; P. Gallus; M. Havranek; M. Janata; M. Marcisovsky; I. Polak; J. Popule; L. Tomasek; M. Tomasek; P. Ruzicka; P. Sicho; J. Smolik; V. Vrba; J. Zalesak; B. Belhorma; M. Belmir; S. W. Nam; I. H. Park; J. Yang; Jong-Seo Chai; Jong-Tae Kim; Geun-Bum Kim; J. Kang; Y. -J. Kwon

2010-04-28T23:59:59.000Z

135

Instrumented Water Tanks can Improve Air Shower Detector Sensitivity  

E-Print Network [OSTI]

Previous works have shown that water Cherenkov detectors have superior sensitivity to those of scintillation counters as applied to detecting extensive air showers (EAS). This is in large part due to their much higher sensitivity to EAS photons which are more than five times more numerous than EAS electrons. Large area water Cherenkov detectors can be constructed relatively cheaply and operated reliably. A sparse detector array has been designed which uses these types of detectors to substantially increase the area over which the Milagro Gamma Ray Observatory collects EAS information. Improvements to the Milagro detector's performance characteristics and sensitivity derived from this array and preliminary results from a prototype array currently installed near the Milagro detector will be presented.

Atkins, R; Berley, D; Chen, M L; Coyne, D G; Delay, R S; Dingus, B L; Dorfan, D E; Ellsworth, R W; Evans, D; Falcone, A D; Fleysher, L; Fleysher, R; Gisler, G; Goodman, J A; Haines, T J; Hoffman, C M; Hugenberger, S; Kelley, L A; Leonor, I; Macri, J R; McConnell, M; McCullough, J F; McEnery, J E; Miller, R S; Mincer, A I; Morales, M F; Némethy, P; Ryan, J M; Schneider, M; Shen, B; Shoup, A L; Sinnis, G; Smith, A J; Sullivan, G W; Thompson, T N; Tümer, T O; Wang, K; Wascko, M O; Westerhoff, S; Williams, D A; Yang, T; Yodh, G B

1999-01-01T23:59:59.000Z

136

Instrumented Water Tanks can Improve Air Shower Detector Sensitivity  

E-Print Network [OSTI]

Previous works have shown that water Cherenkov detectors have superior sensitivity to those of scintillation counters as applied to detecting extensive air showers (EAS). This is in large part due to their much higher sensitivity to EAS photons which are more than five times more numerous than EAS electrons. Large area water Cherenkov detectors can be constructed relatively cheaply and operated reliably. A sparse detector array has been designed which uses these types of detectors to substantially increase the area over which the Milagro Gamma Ray Observatory collects EAS information. Improvements to the Milagro detector's performance characteristics and sensitivity derived from this array and preliminary results from a prototype array currently installed near the Milagro detector will be presented.

R. Atkins; W. Benbow; D. Berley; M. -L. Chen; D. G. Coyne; R. S. Delay; B. L. Dingus; D. E. Dorfan; R. W. Ellsworth; D. Evans; A. Falcone; L. Fleysher; R. Fleysher; G. Gisler; J. A. Goodman; T. J. Haines; C. M. Hoffman; S. Hugenberger; L. A. Kelley; I. Leonor; J. Macri; M. McConnell; J. F. McCullough; J. E. McEnery; R. S. Miller; A. I. Mincer; M. F. Morales; P. Nemethy; J. M. Ryan; M. Schneider; B. Shen; A. Shoup; G. Sinnis; A. J. Smith; G. W. Sullivan; T. N. Thompson; O. T. Tumer; K. Wang; M. O. Wascko; S. Westerhoff; D. A. Williams; T. Yang; G. B. Yodh

1999-07-15T23:59:59.000Z

137

HIgh Rate X-ray Fluorescence Detector  

SciTech Connect (OSTI)

The purpose of this project was to develop a compact, modular multi-channel x-ray detector with integrated electronics. This detector, based upon emerging silicon drift detector (SDD) technology, will be capable of high data rate operation superior to the current state of the art offered by high purity germanium (HPGe) detectors, without the need for liquid nitrogen. In addition, by integrating the processing electronics inside the detector housing, the detector performance will be much less affected by the typically noisy electrical environment of a synchrotron hutch, and will also be much more compact than current systems, which can include a detector involving a large LN2 dewar and multiple racks of electronics. The combined detector/processor system is designed to match or exceed the performance and features of currently available detector systems, at a lower cost and with more ease of use due to the small size of the detector. In addition, the detector system is designed to be modular, so a small system might just have one detector module, while a larger system can have many â?? you can start with one detector module, and add more as needs grow and budget allows. The modular nature also serves to simplify repair. In large part, we were successful in achieving our goals. We did develop a very high performance, large area multi-channel SDD detector, packaged with all associated electronics, which is easy to use and requires minimal external support (a simple power supply module and a closed-loop water cooling system). However, we did fall short of some of our stated goals. We had intended to base the detector on modular, large-area detectors from Ketek GmbH in Munich, Germany; however, these were not available in a suitable time frame for this project, so we worked instead with pnDetector GmbH (also located in Munich). They were able to provide a front-end detector module with six 100 m^2 SDD detectors (two monolithic arrays of three elements each) along with associated preamplifiers; these detectors surpassed the performance we expected to get from the Ketek detectors, however they are housed in a sealed module, which does not offer the ease of repair and expandability weâ??d hoped to achieve with the Ketek SDDâ??s. Our packaging efforts were quite successful, as we came up with a very compact way to mount the detector and to house the associated electronics, as well as a very effective way to reliably take out the heat (from the electronics as well as the detectorâ??s Peltier coolers) without risk of condensation and without external airflow or vibration, which could create problems for the target applications. While we were able to design compact processing electronics that fit into the detector assembly, they are still at the prototype stage, and would require a significant redesign to achieve product status. We have not yet tested this detector at a synchrotron facility; we do still plan on working with some close contacts at the nearby Stanford Synchrotron Radiation Laboratory (SSRL) to get some testing with the beam (using existing commercial electronics for readout, as the integrated processor is not ready for use).

Grudberg, Peter Matthew [XIA LLC

2013-04-30T23:59:59.000Z

138

Oscillator detector  

SciTech Connect (OSTI)

An alien liquid detector employs a monitoring element and an oscillatory electronic circuit for maintaining the temperature of the monitoring element substantially above ambient temperature. The output wave form, eg., frequency of oscillation or wave shape, of the oscillatory circuit depends upon the temperaturedependent electrical characteristic of the monitoring element. A predetermined change in the output waveform allows water to be discriminated from another liquid, eg., oil. Features of the invention employing two thermistors in two oscillatory circuits include positioning one thermistor for contact with water and the other thermistor above the oil-water interface to detect a layer of oil if present. Unique oscillatory circuit arrangements are shown that achieve effective thermistor action with an economy of parts and energizing power. These include an operational amplifier employed in an astable multivibrator circuit, a discrete transistor-powered tank circuit, and use of an integrated circuit chip.

Potter, B.M.

1980-05-13T23:59:59.000Z

139

E-Print Network 3.0 - ahcal prototype temperaturabhaengigkeit...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Summary: a combination of physical and virtual prototyping in 3D. Specifically, 3D-printing techniques are used... -specific physical prototype of the collecting system is...

140

A Prototype for Graphene Material Simulation: Structures and...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Prototype for Graphene Material Simulation: Structures and Interaction Potentials ofCoronene Dimers. A Prototype for Graphene Material Simulation: Structures and Interaction...

Note: This page contains sample records for the topic "argon prototype detector" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

The RICH detector for CLAS12 at Jefferson Lab  

SciTech Connect (OSTI)

The CLAS12 spectrometer at JLab will offer unique possibilities to study the 3D nucleon structure in terms of TMDs and GPDs in the poorly explored valence region, and to perform high precision hadron spectroscopy. A large area ring-imaging Cherenkov detector has been designed to achieve the required hadron identification capability in the momentum range 3-8?GeV/c. The detector, based on a novel hybrid imaging design, foresees an aerogel radiator and an array of multi-anode photomultipliers. The detector concept and preliminary results of test-beams on a prototype are presented.

Pappalardo, Luciano L. [INFN, Ferrara, Italy

2014-06-01T23:59:59.000Z

142

E-Print Network 3.0 - atlas liquid argon Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

argon atoms were packed in a face... the SWNT in order to avoid influence from the bulk phonon spectrum of ... Source: Maruyama, Shigeo - Department of Mechanical...

143

E-Print Network 3.0 - argon 49 Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

injection, radiative plasmas have been produced... ; Impurity control; DIII-D; SOL transport; Argon 1. Introduction In future, high power density fusion devices Source:...

144

E-Print Network 3.0 - argon 48 Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

injection, radiative plasmas have been produced... ; Impurity control; DIII-D; SOL transport; Argon 1. Introduction In future, high power density fusion devices Source:...

145

E-Print Network 3.0 - argon 41 Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

injection, radiative plasmas have been produced... ; Impurity control; DIII-D; SOL transport; Argon 1. Introduction In future, high power density fusion devices Source:...

146

E-Print Network 3.0 - argon endcap calorimeter Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

P. Perrodo Installed today Liquid argon... and TILES calorimeters: All in the cavern, Barrel LARG ... Source: Ecole Polytechnique, Centre de mathmatiques Collection:...

147

2 0-3D TRANSITION. MULTILAYER ADSORPTION OF ARGON AND KRYPTON  

E-Print Network [OSTI]

'isothermes d'adsorption d'argon et de krypton sur la facede clivage de divers halog6nures lamellaires ont CtC d

Paris-Sud XI, Université de

148

E-Print Network 3.0 - atmospheric pressure argon Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

The discharge behaviour of a dielectric barrier discharge (DBD) in low-pressure argon gas was investigated... -372706040700+1230.00 2006 IOP Publishing Ltd Printed in the...

149

E-Print Network 3.0 - argon 34 Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

have been produced... ; Impurity control; DIII-D; SOL transport; Argon 1. Introduction In future, high power density fusion devices Source: California at San Diego, University of -...

150

E-Print Network 3.0 - argon ions Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

have been produced... ; Impurity control; DIII-D; SOL transport; Argon 1. Introduction In future, high power density fusion devices Source: California at San Diego, University of -...

151

E-Print Network 3.0 - argon spectral lines Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

mid-IR spectral region. A relatively... . Photoelectric scan of argon arc spectrum in the near-infrared ... Source: Migdall, Alan - Optical Technology Division, National Institute...

152

E-Print Network 3.0 - argon complexes Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Anomalous cooling of the parallel velocity in seeded beams Summary: distribution of a lithium supersonic beam produced by seeding lithium in argon. The parallel temperature... for...

153

E-Print Network 3.0 - argon laser radiation Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Search Powered by Explorit Topic List Advanced Search Sample search results for: argon laser radiation Page: << < 1 2 3 4 5 > >> 1 Permeabilizing Millions of Cells with Single...

154

Improved constraints on transit time distributions from argon 39: A maximum entropy approach  

E-Print Network [OSTI]

Gull (1991), Bayesian maximum entropy image reconstruction,Atlantic venti- lated? Maximum entropy inversions of bottlefrom argon 39: A maximum entropy approach Mark Holzer 1,2

Holzer, Mark; Primeau, Francois W

2010-01-01T23:59:59.000Z

155

E-Print Network 3.0 - argon 37 Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

by changing the potential between argon and solid molecule. With a visualization of the void Source: Maruyama, Shigeo - Department of Mechanical Engineering, University of Tokyo...

156

E-Print Network 3.0 - argon 42 Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

by changing the potential between argon and solid molecule. With a visualization of the void Source: Maruyama, Shigeo - Department of Mechanical Engineering, University of Tokyo...

157

Calculational comparison of DT, neon, and argon implosions  

SciTech Connect (OSTI)

A number of laboratories have been doing laser driven implosions of pure neon and argon gas as a diagnostic of the peak imploded conditions. The relationship of these implosions to DT implosions has been unclear. This paper will explore the physics of these higher Z gases and show that they are fundamentally easier to compress than DT gas. Specifically, this paper will show that, for the same initial mass density, and the same capsule design and drive conditions, the calculated peak compressed density is dependent on the type of fill gas, being substantially higher for Ne and Ar implosions than for DT implosions.

Stevens, J.C.

1980-10-28T23:59:59.000Z

158

Alexandria Digital Earth ProtoType The Alexandria Digital Earth  

E-Print Network [OSTI]

Alexandria Digital Earth ProtoType The Alexandria Digital Earth Prototype System Terence Smith Greg Janée James Frew Anita Coleman #12;Alexandria Digital Earth ProtoType 2Smith et al. / JCDL 2001 / 2x Earth ProtoType 3Smith et al. / JCDL 2001 / 2x-Jun-2001 Core System (inherited from ADL) Components

Janée, Greg

159

Prototalk : an Environment for Teaching, Understanding, Designing and Prototyping  

E-Print Network [OSTI]

With prototype-based languages, concretization and abstraction are unified into a single concept a prototype into several variations. In the first age of prototype-based languages, research languages such as Self [3 compact language with NewtonScript's double inheritance [23], Pic% [24] a new prototype language

Paris-Sud XI, Université de

160

Rapid prototyping is coming of age  

SciTech Connect (OSTI)

This article examines how, by accelerating the design process and speeding tooling development, rapid prototyping technology helps manufacturers cut new product cycle times and costs. During the last decade, a class of technologies has emerged by which a computer-aided design file of an object can be converted into a physical model through special sintering, layering, or deposition techniques. Called rapid prototyping (RP), or solid free-form fabrication, the major application for this technology has been early verification of product designs and quick production of prototypes for testing. Multiple prototypes can now be reproduced more economically by using the RP master as a pattern for creating molded or soft tooling. Interest in desktop (or more accurately, office) rapid prototyping for visualization and design verification is growing, but it is not yet easy to cost-justify. Recently, the fabrication of patterns for limited-run production tooling has become more common. Today, the most popular rapid tooling options are silicone rubber (RTV) molding and epoxy and spray metal tooling. For metal part production, the choices are investment, plaster, spin, and sand casting.

Ashley, S.

1995-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "argon prototype detector" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

EVALUATION OF A PROTOTYPE SOLAR AWNING A prototype solar awning has been designed and installed on  

E-Print Network [OSTI]

and installed on a University of Oregon campus building. The solar awning is composed of a light shelfEVALUATION OF A PROTOTYPE SOLAR AWNING ABSTRACT A prototype solar awning has been designed with photovoltaic modules at- tached tilted 20° to the south. An interior light shelf and LED lights have been

Oregon, University of

162

The Development of Coplanar CZT Detectors for Gamma-Ray Astronomy  

E-Print Network [OSTI]

The development of CdZnTe detectors with an orthogpnal coplanar anode structure has important implications for future astrophysical instrumentation. As electron-only devices, like pixel detectors, coplanar anode strip detectors can be fabricated in the thickness required to be effective for photons with energies in excess of 500 keV. Unlike conventional double-sided strip detectors, the coplanar anode strip detectors require segmented contacts and signal processing electronics on only one surface. This facilitates the fabrication of closely-packed large area arrays that will be required for the next generation of coded aperture imagers. These detectors provide both very good energy resolution and sub-millimeter spatial resolution (in all three spatial dimensions) with far fewer electronic channels than are required for pixel detectors. Here we summarize results obtained from prototype detectors having a thickness of 5 mm and outline a concept for large area applications.

McConnell, M L; Macri, J R; McClish, M; Ryan, J R

2001-01-01T23:59:59.000Z

163

Polarimetric performance of a Laue lens gamma-ray CdZnTe focal plane prototype  

SciTech Connect (OSTI)

A gamma-ray telescope mission concept [gamma ray imager (GRI)] based on Laue focusing techniques has been proposed in reply to the European Space Agency call for mission ideas within the framework of the next decade planning (Cosmic Vision 2015-2025). In order to optimize the design of a focal plane for this satellite mission, a CdZnTe detector prototype has been tested at the European Synchrotron Radiation Facility under an {approx}100% polarized gamma-ray beam. The spectroscopic, imaging, and timing performances were studied and in particular its potential as a polarimeter was evaluated. Polarization has been recognized as being a very important observational parameter in high energy astrophysics (>100 keV) and therefore this capability has been specifically included as part of the GRI mission proposal. The prototype detector tested was a 5 mm thick CdZnTe array with an 11x11 active pixel matrix (pixel area of 2.5x2.5 mm{sup 2}). The detector was irradiated by a monochromatic linearly polarized beam with a spot diameter of about 0.5 mm over the energy range between 150 and 750 keV. Polarimetric Q factors of 0.35 and double event relative detection efficiency of 20% were obtained. Further measurements were performed with a copper Laue monochromator crystal placed between the beam and the detector prototype. In this configuration we have demonstrated that a polarized beam does not change its polarization level and direction after undergoing a small angle (<1 deg.) Laue diffraction inside a crystal.

Curado da Silva, R. M. [Departmento de Fisica, Universidade de Coimbra, P-3000 Coimbra (Portugal); Center for Space Radiations, Univesite Catholique de Louvain (Belgium); Caroli, E.; Stephen, J. B.; Schiavone, F.; Donati, A.; Ventura, G. [Istituto di Astrofisica Spaziale e Fisica Cosmica-Bologna, Via Gobetti 101, I-40129 Bologna (Italy); Pisa, A.; Auricchio, N.; Frontera, F. [Dipartimento di Fisica, Universita di Ferrara, Ferrara (Italy); Del Sordo, S. [Istituto di Astrofisica Spaziale e Fisica Cosmica-Palermo, Via Ugo La Malfa 153, 90146 Palermo (Italy); Honkimaeki, V. [European Synchrotron Radiation Facility, Grenoble (France); Trindade, A. M. F. [Departmento de Fisica, Universidade de Coimbra, P-3000 Coimbra (Portugal)

2008-10-15T23:59:59.000Z

164

Results from a Prototype MAPS Sensor Telescope and Readout Systemwith Zero Suppression for the Heavy Flavor Tracker at STAR  

SciTech Connect (OSTI)

We describe a three Mimostar-2 Monolithic Active PixelSensor (MAPS) sensor telescope prototype with an accompanying readoutsystem incorporating on-the-fly data sparsification. The system has beencharacterized and we report on the measured performance of the sensortelescope and readout system in beam tests conducted both at the AdvancedLight Source (ALS) at Lawrence Berkeley National Laboratory (LBNL) and inthe STAR experiment at the Relativistic Heavy Ion Collider (RHIC). Thiseffort is part of the development and prototyping work that will lead toa vertex detector for the STAR experiment.

Greiner, Leo C.; Matis, Howard S.; Ritter, Hans G.; Rose, AndrewA.; Stezelberger, Thorsten; Sun, Xiangming; Szelezniak, Michal A.; Thomas, James H.; Vu, Chinh Q.; Wieman, Howard H.

2008-02-11T23:59:59.000Z

165

Adsorption of the first layer of argon on graphite (*) Laboratoire des Composs non St0153chiomtriques,  

E-Print Network [OSTI]

]. The cooling bath is solid nitrogen obtained by pumping. The adsorption cell, enclosed in an aluminium blockL-9 Adsorption of the first layer of argon on graphite (*) F. Millot Laboratoire des Composés non déterminé des isothermes d'adsorption d'argon sur le graphite entre 55 et 62 K. Nous proposons une

Boyer, Edmond

166

INTERNATIONAL CONGRESS OF THE AERONAUTICAL SCIENCES Hypersonic flows of argon, nitrogen, oxygen,  

E-Print Network [OSTI]

, nitrogen, oxygen, and carbon dioxide near a toroidal ballute have been investigated numerically using of nitrogen, dissociating oxygen, argon, and carbon dioxide at 8R H 2R and the Knudsen number Kn D from 02G code [12]. Collisions in nitrogen, argon, oxygen, and carbon dioxide are modeled using

Riabov, Vladimir V.

167

E-Print Network 3.0 - argon plasma column Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

surface wave produced plasma column obtained at 40 mtorr of argon in a 25 mm i.d. pyrex tube... shows the plasma column obtained at 40 mtorr of argon in a 25 mm i.d. tube with 80 W...

168

Effect of argon addition on plasma parameters and dust charging in hydrogen plasma  

SciTech Connect (OSTI)

Experimental results on effect of adding argon gas to hydrogen plasma in a multi-cusp dusty plasma device are reported. Addition of argon modifies plasma density, electron temperature, degree of hydrogen dissociation, dust current as well as dust charge. From the dust charging profile, it is observed that the dust current and dust charge decrease significantly up to 40% addition of argon flow rate in hydrogen plasma. But beyond 40% of argon flow rate, the changes in dust current and dust charge are insignificant. Results show that the addition of argon to hydrogen plasma in a dusty plasma device can be used as a tool to control the dust charging in a low pressure dusty plasma.

Kakati, B., E-mail: bharatkakati15@gmail.com; Kausik, S. S.; Saikia, B. K. [Centre of Plasma Physics-Institute for Plasma Research, Nazirakhat, Sonapur, Kamrup 782402, Assam (India); Bandyopadhyay, M.; Saxena, Y. C. [Institute for Plasma Research, Bhat, Gandhinagar 382 428 (India)

2014-10-28T23:59:59.000Z

169

Carbon dioxide, argon, nitrogen and methane clathrate hydrates:1 thermodynamic modelling, investigation of their stability in Martian2  

E-Print Network [OSTI]

1 Carbon dioxide, argon, nitrogen and methane clathrate hydrates:1 thermodynamic modelling-4Dec2012 #12;3 Keywords: Mars, clathrate hydrate, nitrogen, carbon dioxide, argon, methane, equilibrium and allows to simulating a Martian gas, CO2 dominated (95.3%) plus nitrogen6 (2.7%) and argon (2

Paris-Sud XI, Université de

170

Future Internet Infrastructures for FI Prototyping  

E-Print Network [OSTI]

++ Fraunhofer Institute FOKUS, Berlin ++ www.fokus.fraunhofer.de/go/innovation ++ 11­2009 #12;Future Internet Berlin AV de- partment (Architektur für Vermittlungskno- ten). Part of the Fraunhofer innovation clusFuture Internet Infrastructures for FI Prototyping NGN Evolution toward Future Internet Fraunhofer

Wichmann, Felix

171

Prototype bucket foundation for wind turbines  

E-Print Network [OSTI]

Prototype bucket foundation for wind turbines -natural frequency estimation Lars Bo Ibsen Morten bucket foundation for wind turbines -natural frequency estimation by Lars Bo Ibsen Morten Liingaard foundation for wind turbines--natural frequency estimation" is divided into four numbered sections

172

Development of a prototype lignin concentration sensor  

SciTech Connect (OSTI)

The US Department of Energy, Office of Industrial Technologies, is sponsoring a research and development program for the development of a real-time, in-situ sensor to measure the concentration of lignin in wood pulp. The program is composed of phase I showing feasibility which is now complete, phase II for development and testing of a Field Prototype, in progress, Phase III commercialization. Phase I work (funded entirely by B W) demonstrated a correlation between the fluorescence intensity and lignin concentration (as measured by TAPPI procedure, T 236 hm-85 Kappa Number of Pulp) for undiluted wood pulp samples. In Phase II, a laboratory test program directed at characterizing the fluorescence of wood pulp has been conducted as a prelude to the design of a prototype sensor. The current report summarizes the testing completed in Phase I and documents the Phase II laboratory testing completed through December 1991. Future Phase II efforts include additional laboratory testing, design and fabrication of a prototype sensor, and field testing of the prototype sensor. Phase III of the program will concentrate on the incorporation of the sensor into a control system and commercialization of the sensor.

Malito, M.L.; Jeffers, L.A.

1993-01-01T23:59:59.000Z

173

Development of a prototype lignin concentration sensor  

SciTech Connect (OSTI)

The US Department of Energy, Office of Industrial Technologies, is sponsoring a research and development program for the development of a real-time, in-situ sensor to measure the concentration of lignin in wood pulp. The program is composed of phase I showing feasibility which is now complete, phase II for development and testing of a Field Prototype, in progress, Phase III commercialization. Phase I work (funded entirely by B&W) demonstrated a correlation between the fluorescence intensity and lignin concentration (as measured by TAPPI procedure, T 236 hm-85 Kappa Number of Pulp) for undiluted wood pulp samples. In Phase II, a laboratory test program directed at characterizing the fluorescence of wood pulp has been conducted as a prelude to the design of a prototype sensor. The current report summarizes the testing completed in Phase I and documents the Phase II laboratory testing completed through December 1991. Future Phase II efforts include additional laboratory testing, design and fabrication of a prototype sensor, and field testing of the prototype sensor. Phase III of the program will concentrate on the incorporation of the sensor into a control system and commercialization of the sensor.

Malito, M.L.; Jeffers, L.A.

1993-01-01T23:59:59.000Z

174

Nested Autonomy Prototype for Distributed Undersea Sensing  

E-Print Network [OSTI]

MOOS-IvP Nested Autonomy Prototype for Distributed Undersea Sensing User's Guide H. Schmidt, M Autonomous Network Architecture, based on the Nested Autonomy paradigm, as implemented and operated Nested Autonomy Paradigm for Distributed Undersea Sensing 11 2 Autonomy in Communication

Schmidt, Henrik

175

Light Emission of Argon Discharges: Importance of Heavy Particle Processes  

SciTech Connect (OSTI)

Simulation studies on argon glow discharges established between flat disc electrodes, at pressure x electrode separation (pd) of 45 Pa cm are reported, with special attention to heavy-particle processes including excitation-induced light emission. The discharges are investigated through self-consistent hybrid modelling, consisting of a fluid description for components near local hydrodynamic equilibrium (slow electrons and ions), and Monte Carlo treatment of energetic electrons and heavy particles (ions and neutral atoms). The light emission profiles are analyzed for a wide range of operating conditions. The numerical results for the relative intensities and the shapes of the negative glow (created by electron impact excitation) and the cathode glow (created by heavy particle impact excitation) are in good agreement with experimental data obtained by Maric et al.

Hartmann, Peter [Research Institute for Solid State Physics and Optics, Hungarian Academy of Sciences, POB 49, H-1525 Budapest (Hungary)

2004-12-01T23:59:59.000Z

176

Guest disorder and high pressure behavior of argon hydrates  

SciTech Connect (OSTI)

The structure of argon hydrate was studied at ambient pressure and low temperature, and between 1.7 and 4.2 GPa at 295 K. This analysis produced a single Ar guest atom, positionally disordered off-center in the large cages of sII. Above 1.7 GPa Ar clathrate transformed to a mixture of a body-centered orthorhombic filled-ice phase, which can be viewed as a polytype of ice-Ih, and high pressure forms of pure ice. The guest disorder is further substantiated by analysis of the guest to host ratio in this high pressure filled-ice structure. The bulk modulus of Ar filled-ice found to be 11.7 {+-} 0.4 GPa.

Yang, L.; Tulk, C.A.; Klug, D.D.; Chakoumakos, B.C.; Ehm, L.; Molaison, J.J.; Parise, J.B.; Simonson, J.M. (NRCC); (SBU); (ORNL)

2010-03-29T23:59:59.000Z

177

GADRAS Detector Response Function.  

SciTech Connect (OSTI)

The Gamma Detector Response and Analysis Software (GADRAS) applies a Detector Response Function (DRF) to compute the output of gamma-ray and neutron detectors when they are exposed to radiation sources. The DRF is fundamental to the ability to perform forward calculations (i.e., computation of the response of a detector to a known source), as well as the ability to analyze spectra to deduce the types and quantities of radioactive material to which the detectors are exposed. This document describes how gamma-ray spectra are computed and the significance of response function parameters that define characteristics of particular detectors.

Mitchell, Dean J.; Harding, Lee; Thoreson, Gregory G; Horne, Steven M.

2014-11-01T23:59:59.000Z

178

Clinical prototype of a plastic water-equivalent scintillating fiber dosimeter array for QA applications  

SciTech Connect (OSTI)

A clinical prototype of a scintillating fiber dosimeter array for quality assurance applications is presented. The array consists of a linear array of 29 plastic scintillation detectors embedded in a water-equivalent plastic sheet coupled to optical fibers used to guide optical photons to a charge coupled device (CCD) camera. The CCD is packaged in a light-tight, radiation-shielded housing designed for convenient transport. A custom designed connector is used to ensure reproducible mechanical positioning of the optical fibers relative to the CCD. Profile and depth dose characterization measurements are presented and show that the prototype provides excellent dose measurement reproducibility ({+-}0.8%) in-field and good accuracy ({+-}1.6% maximum deviation) relative to the dose measured with an IC10 ionization chamber.

Lacroix, Frederic; Archambault, Louis; Gingras, Luc; Guillot, Mathieu; Beddar, A. Sam; Beaulieu, Luc [Departement de Physique, de Genie Physique et d'Optique, Universite Laval, Quebec, Quebec, G1K 7P4 (Canada) and Departement de Radio-Oncologie, Hotel-Dieu de Quebec, Centre Hospitalier Universitaire de Quebec, Quebec, Quebec G1R2J6 (Canada); Department of Radiation Physics, University of Texas M. D. Anderson Cancer Center, Houston, Texas 77030 (United States); Departement de Physique, de Genie Physique et d'Optique, Universite Laval, Quebec, Quebec G1K 7P4 (Canada) and Departement de Radio-Oncologie, Hotel-Dieu de Quebec, Centre Hospitalier Universitaire de Quebec, Quebec, Quebec G1R2J6 (Canada); Department of Radiation Physics, University of Texas M. D. Anderson Cancer Center, Houston, Texas 77030 (United States); Departement de Physique, de Genie Physique et d'Optique, Universite Laval, Quebec, Quebec, G1K 7P4 (Canada) and Departement de Radio-Oncologie, Hotel-Dieu de Quebec, Centre Hospitalier Universitaire de Quebec, Quebec, Quebec G1R2J6 (Canada)

2008-08-15T23:59:59.000Z

179

Ultratrace detector for hand-held gas chromatography  

DOE Patents [OSTI]

An ultratrace detector system for hand-held gas chromatography having high sensitivity, for example, to emissions generated during production of weapons, biological compounds, drugs, etc. The detector system is insensitive to water, air, helium, argon, oxygen, and C0.sub.2. The detector system is basically composed of a hand-held capillary gas chromatography (GC), an insulated heated redox-chamber, a detection chamber, and a vapor trap. For example, the detector system may use gas phase redox reactions and spectral absorption of mercury vapor. The gas chromatograph initially separates compounds that percolate through a bed of heated mercuric oxide (HgO) in a silica--or other metal--aerogel material which acts as an insulator. Compounds easily oxidized by HgO liberate atomic mercury that subsequently pass through a detection chamber which includes a detector cell, such as quartz, that is illuminated with a 254 nm ultra-violet (UV) mercury discharge lamp which generates the exact mercury absorption bands that are used to detect the liberated mercury atoms. Atomic mercury strongly absorbs 254 nm energy is therefore a specific signal for reducing compounds eluting from the capillary GC, whereafter the atomic mercury is trapped for example, in a silicon-aerogel trap.

Andresen, Brian D. (Livermore, CA); Miller, Fred S. (Bethal Island, CA)

1999-01-01T23:59:59.000Z

180

Performance confirmation of the Belle II imaging Time Of Propogation (iTOP) prototype counter  

SciTech Connect (OSTI)

The Bell Detector at the KEKB asymmetric-energy e{sup +}e{sup -} collider performed extremely well, logging an integrated luminosity an order of magnitude higher than the design baseline. With this inverse attobarn of integrated luminosity, time-dependent CP-violation inn the 3rd generation beauty quarks was firmly established, and is now a precision measurement. Going beyond this to explore if the Kobayashi-Maskawa mechanism is the only contributor to quark-mixing, and to interrogate the flavor sector for non-standard model enhancements, requires a detector and accelerator capable of topping this world-record luminosity by more than an order of magnitude. The Belle II detector at the upgraded Super-KEKB accelerator has been designed to meet this highly ambitious goal of operating at a luminosity approaching 10{sup 36} cm{sup -2} s{sup -1}. Such higher event rates and backgrounds require upgrade of essentially all detector subsystems, as well as their readout. Comparing the Belle composite (threshold Aerogel + Time of Flight) particle identification (PID) system with the DIRC employed by BaBar, quartz radiator internal Cherenkov photon detection proved to have higher kaon efficiency and lower pion fake rates. However, because the detector structure and CsI calorimeter will be retained, an improved barrel PID must fit within a very narrow envelope, as indicated in Figure 1. To effectively utilize this space, a more compact detector concept based on the same quartz radiators, but primarily using photon arrival time was proposed. This Time Of Propagation (TOP) counter was studied in a number of earlier prototype tests. Key to the necessary 10's of picosecond single-photon timing has been the development of the so-called SL-10 Micro-Channel Plate Photo-Multiplier Tube (MCP-PMT), which has demonstrated sub-40 ps single photon Transit Time Spread TTS. Further simulation study of this detector concept indicated that a focusing mirror in the forward direction, as well as a modest image expansion volume and more highly pixelated image plane improve the theoretical detector performance, since timing alone is limited by chromatic dispersion of the Cherenkov photons. This imaging-TOP (or iTOP) counter is the basis of Belle II barrel PID upgrade. However, a number of critical performance parameters must be demonstrated prior to releasing this prototype design for production manufacture.

Schwartz, Alan; Liu, Yang; Belhorn, Matt; /Cincinnati U.; Browder, Thomas; Varner, Gary; Andrew, Matt; Rosen, Marc; Barrett, Matthew; Nishimura, Kurtis; Anderson, Eric /Hawaii U.; Iijima, Toru; /Nagoya U. /PNL, Richland

2011-10-17T23:59:59.000Z

Note: This page contains sample records for the topic "argon prototype detector" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

Production and test of isotopically modified Ge detectors for GERDA  

SciTech Connect (OSTI)

The viability of producing BEGe-type detectors from isotopically modified germanium for the GERDA experiment is demonstrated by a complete test of the supply chain. GERDA is built to search for neutrinoless double beta (0v{beta}{beta}) decay of Ge using high-purity germanium detectors made of material enriched in {sup 76}Ge. To reach a sensitivity for 0v{beta}{beta} decay of <1.4 x 10{sup 26} years, new active background suppression techniques are necessary. BEGe detectors enable a capability to efficiently identify and reject background events, while keeping large acceptance of 0v{beta}{beta} decay signal, by using novel pulse shape discrimination (PSD) techniques. The PSD as well as spectroscopic performance of prototype BEGe detectors from isotopically modified Ge was verified by comprehensive testing. (authors)

Budjas, D. [Physik-Dept. E15, Technishe Universitaet Muenchen, James-Franck-Strasse 1, Garching bei Muenchen, D-85748 (Germany)

2011-07-01T23:59:59.000Z

182

Addition of photosensitive dopants to the D0 liquid argon calorimeter  

SciTech Connect (OSTI)

The addition of photosensitive dopants to liquid argon greatly enhances the signal from heavily ionizing particles. Since binding energy losses we correlated with the heavily ionizing component in hadronic showers, the addition of photosensitive dopants has been suggested as a mechanism to tune the e/[pi] ratio in liquid argon calorimeters. A measurement was performed at the FNAL test beam, adding 4 ppM tetramethylgermanium to the D[phi] uranium-liquid argon calorimeter. An increase in response for electromagnetic and hadronic showers was observed, with no net change in the e/[pi] ratio.

Amos, N.A.; Anderson, D.F.

1992-10-01T23:59:59.000Z

183

Gamma spectroscopic measurements using the PID350 pixelated CdTe radiation detector  

E-Print Network [OSTI]

Spectroscopic measurements are presented using the PID350 pixelated gamma radiation detectors. A high-speed data acquisition system has been developed in order to reduce the data loss during the data reading in case of a high flux of photons. A data analysis framework has been developed in order to improve the resolution of the acquired energy spectra, using specific calibration parameters for each PID350's pixel. Three PID350 detectors have been used to construct a stacked prototype system and spectroscopic measurements have been performed in order to test the ability of the prototype to localize radioactive sources.

Karafasoulis, K; Seferlis, S; Papadakis, I; Loukas, D; Lambropoulos, C; Potiriadis, C

2010-01-01T23:59:59.000Z

184

Gamma spectroscopic measurements using the PID350 pixelated CdTe radiation detector  

E-Print Network [OSTI]

Spectroscopic measurements are presented using the PID350 pixelated gamma radiation detectors. A high-speed data acquisition system has been developed in order to reduce the data loss during the data reading in case of a high flux of photons. A data analysis framework has been developed in order to improve the resolution of the acquired energy spectra, using specific calibration parameters for each PID350's pixel. Three PID350 detectors have been used to construct a stacked prototype system and spectroscopic measurements have been performed in order to test the ability of the prototype to localize radioactive sources.

K. Karafasoulis; K. Zachariadou; S. Seferlis; I. Papadakis; D. Loukas; C. Lambropoulos; C. Potiriadis

2010-11-15T23:59:59.000Z

185

Midas: Fabricating Custom Capacitive Touch Sensors to Prototype Interactive Objects  

E-Print Network [OSTI]

. While digital fabrication techniques such as 3D printing make it easier to prototype the shape of custom processes like 3D printing and CNC ma- chining make it easier to prototype the form of such products

California at Irvine, University of

186

Gamma ray detector shield  

DOE Patents [OSTI]

A gamma ray detector shield comprised of a rigid, lead, cylindrical-shaped vessel having upper and lower portions with an pneumatically driven, sliding top assembly. Disposed inside the lead shield is a gamma ray scintillation crystal detector. Access to the gamma detector is through the sliding top assembly.

Ohlinger, R.D.; Humphrey, H.W.

1985-08-26T23:59:59.000Z

187

Tevatron detector upgrades  

SciTech Connect (OSTI)

The D0 and CDF experiments are in the process of upgrading their detectors to cope with the high luminosities projected for the remainder of Tevatron Run II. They discuss the expected Tevatron environment through 2009, the detector challenges due to increasing luminosity in this period, and the solutions undertaken by the two experiments to mitigate detector problems and maximize physics results.

Lipton, R.; /Fermilab

2005-01-01T23:59:59.000Z

188

Prototypical Consolidation Demonstration Project: Final report  

SciTech Connect (OSTI)

This is the final report of the Prototypical Consolidation Demonstration Project, which was funded by the US Department of Energy`s Office of Civilian Radioactive Waste Management. The project had two objectives: (a) to develop and demonstrate a prototype of production-scale equipment for the dry, horizontal consolidation and packaging of spent nuclear fuel rods from commercial boiling water reactor and pressurized water reactor fuel assemblies, and (b) to report the development and demonstration results to the US Department of Energy, Idaho Operations Office. This report summarizes the activities and conclusions of the project management contractor, EG&G Idaho, Inc., and the fabrication and testing contractor, NUS Corporation (NUS). The report also presents EG&G Idaho`s assessments of the equipment and procedures developed by NUS.

Gili, J.A.; Poston, V.K.

1993-11-01T23:59:59.000Z

189

EMC Phenomena in HEP Detectors: Prevention and Cost Savings  

SciTech Connect (OSTI)

This paper addresses electromagnetic compatibility (EMC) studies applied to high-energy physics (HEP) detectors. They are focused on the quantification of the front-end electronic (FEE) sensitivity to conductive noise coupled through the input/output cables. Immunity tests performed on FEE prototypes of both the CMS hadron calorimeter and the CMS silicon tracker are presented. These tests characterize the sensitivity of the FEE to common and differential mode noise coupled through the power cables and the slow control network. Immunity tests allow evaluating the weakest areas of the system to take corrective actions before the integration of the overall detector, saving time and important costs.

Arteche, F.; /Imperial Coll., London /CERN; Rivetta, C.; /SLAC

2006-06-06T23:59:59.000Z

190

DOE`s annealing prototype demonstration projects  

SciTech Connect (OSTI)

One of the challenges U.S. utilities face in addressing technical issues associated with the aging of nuclear power plants is the long-term effect of plant operation on reactor pressure vessels (RPVs). As a nuclear plant operates, its RPV is exposed to neutrons. For certain plants, this neutron exposure can cause embrittlement of some of the RPV welds which can shorten the useful life of the RPV. This RPV embrittlement issue has the potential to affect the continued operation of a number of operating U.S. pressurized water reactor (PWR) plants. However, RPV material properties affected by long-term irradiation are recoverable through a thermal annealing treatment of the RPV. Although a dozen Russian-designed RPVs and several U.S. military vessels have been successfully annealed, U.S. utilities have stated that a successful annealing demonstration of a U.S. RPV is a prerequisite for annealing a licensed U.S. nuclear power plant. In May 1995, the Department of Energy`s Sandia National Laboratories awarded two cost-shared contracts to evaluate the feasibility of annealing U.S. licensed plants by conducting an anneal of an installed RPV using two different heating technologies. The contracts were awarded to the American Society of Mechanical Engineers (ASME) Center for Research and Technology Development (CRTD) and MPR Associates (MPR). The ASME team completed its annealing prototype demonstration in July 1996, using an indirect gas furnace at the uncompleted Public Service of Indiana`s Marble Hill nuclear power plant. The MPR team`s annealing prototype demonstration was scheduled to be completed in early 1997, using a direct heat electrical furnace at the uncompleted Consumers Power Company`s nuclear power plant at Midland, Michigan. This paper describes the Department`s annealing prototype demonstration goals and objectives; the tasks, deliverables, and results to date for each annealing prototype demonstration; and the remaining annealing technology challenges.

Warren, J.; Nakos, J.; Rochau, G.

1997-02-01T23:59:59.000Z

191

Mechanical Measurements of the ALMA Prototype Antennas  

E-Print Network [OSTI]

The specifications of the Atacama Large Millimeter Array (ALMA) have placed stringent requirements on the mechanical performance of its antennas. As part of the evaluation process of the VertexRSI and Alcatel EIE Consortium (AEC) ALMA prototype antennas, measurements of the path length, thermal, and azimuth bearing performance were made under a variety of weather conditions and observing modes. The results of mechanical measurements, reported here, are compared to the antenna specifications.

A. Greve; J. G. Mangum

2007-10-30T23:59:59.000Z

192

Prototalk : an Environment for Teaching, Understanding, Designing and Prototyping  

E-Print Network [OSTI]

With prototype-based languages, concretization and abstraction are unified into a single concept a prototype into several variations. In the first age of prototype-based languages, research languages such as Self [3-client programming language [21] [22]. More recently IO, a new and extremely compact language with Newton

Ducasse, Stéphane

193

High-energy detector  

DOE Patents [OSTI]

The preferred embodiments are directed to a high-energy detector that is electrically shielded using an anode, a cathode, and a conducting shield to substantially reduce or eliminate electrically unshielded area. The anode and the cathode are disposed at opposite ends of the detector and the conducting shield substantially surrounds at least a portion of the longitudinal surface of the detector. The conducting shield extends longitudinally to the anode end of the detector and substantially surrounds at least a portion of the detector. Signals read from one or more of the anode, cathode, and conducting shield can be used to determine the number of electrons that are liberated as a result of high-energy particles impinge on the detector. A correction technique can be implemented to correct for liberated electron that become trapped to improve the energy resolution of the high-energy detectors disclosed herein.

Bolotnikov, Aleksey E. (South Setauket, NY); Camarda, Giuseppe (Farmingville, NY); Cui, Yonggang (Upton, NY); James, Ralph B. (Ridge, NY)

2011-11-22T23:59:59.000Z

194

E-Print Network 3.0 - argon laser vascular Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

LIBRARY AT UTSI CONTACT Wes McMinn AT EXT 313 Summary: . Handling Oxygen Safely by Praxair (11:40 minutes). 3. Using Nitrogen and Argon Safely by Linde (23... :30 minutes) 4....

195

E-Print Network 3.0 - argon reactions cross Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

LIBRARY AT UTSI CONTACT Wes McMinn AT EXT 313 Summary: . Handling Oxygen Safely by Praxair (11:40 minutes). 3. Using Nitrogen and Argon Safely by Linde (23... :30 minutes) 4....

196

E-Print Network 3.0 - argon laser treatment Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

LIBRARY AT UTSI CONTACT Wes McMinn AT EXT 313 Summary: . Handling Oxygen Safely by Praxair (11:40 minutes). 3. Using Nitrogen and Argon Safely by Linde (23... :30 minutes) 4....

197

E-Print Network 3.0 - argon 40 Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

LIBRARY AT UTSI CONTACT Wes McMinn AT EXT 313 Summary: . Handling Oxygen Safely by Praxair (11:40 minutes). 3. Using Nitrogen and Argon Safely by Linde (23... :30 minutes) 4....

198

E-Print Network 3.0 - argon laser iridotomy Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

LIBRARY AT UTSI CONTACT Wes McMinn AT EXT 313 Summary: . Handling Oxygen Safely by Praxair (11:40 minutes). 3. Using Nitrogen and Argon Safely by Linde (23... :30 minutes) 4....

199

E-Print Network 3.0 - argon laser peripheral Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

LIBRARY AT UTSI CONTACT Wes McMinn AT EXT 313 Summary: . Handling Oxygen Safely by Praxair (11:40 minutes). 3. Using Nitrogen and Argon Safely by Linde (23... :30 minutes) 4....

200

E-Print Network 3.0 - argon laser stimulation Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

LIBRARY AT UTSI CONTACT Wes McMinn AT EXT 313 Summary: . Handling Oxygen Safely by Praxair (11:40 minutes). 3. Using Nitrogen and Argon Safely by Linde (23... :30 minutes) 4....

Note: This page contains sample records for the topic "argon prototype detector" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

E-Print Network 3.0 - argon laser phototherapy Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

LIBRARY AT UTSI CONTACT Wes McMinn AT EXT 313 Summary: . Handling Oxygen Safely by Praxair (11:40 minutes). 3. Using Nitrogen and Argon Safely by Linde (23... :30 minutes) 4....

202

E-Print Network 3.0 - argon laser trabeculoplasty Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

LIBRARY AT UTSI CONTACT Wes McMinn AT EXT 313 Summary: . Handling Oxygen Safely by Praxair (11:40 minutes). 3. Using Nitrogen and Argon Safely by Linde (23... :30 minutes) 4....

203

E-Print Network 3.0 - argon 30 Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

LIBRARY AT UTSI CONTACT Wes McMinn AT EXT 313 Summary: . Handling Oxygen Safely by Praxair (11:40 minutes). 3. Using Nitrogen and Argon Safely by Linde (23:30... . Safe...

204

E-Print Network 3.0 - argon Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

LIBRARY AT UTSI CONTACT Wes McMinn AT EXT 313 Summary: . Handling Oxygen Safely by Praxair (11:40 minutes). 3. Using Nitrogen and Argon Safely by Linde (23... :30 minutes) 4....

205

E-Print Network 3.0 - argon laser photocoagulation Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

LIBRARY AT UTSI CONTACT Wes McMinn AT EXT 313 Summary: . Handling Oxygen Safely by Praxair (11:40 minutes). 3. Using Nitrogen and Argon Safely by Linde (23... :30 minutes) 4....

206

E-Print Network 3.0 - argon 40 reactions Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Collection: Chemistry ; Materials Science 16 Energy of the quasi-free electron in supercritical argon near the critical point C.M. Evans1, Summary: Energy of the quasi-free...

207

E-Print Network 3.0 - air argon carbon Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

min-1 to convert the amorphous as-prepared Fe... : "260-ARG" denotes as-prepared FeOx aerogels heated under argon flow at 260 C and ... Source: Ris National Laboratory...

208

E-Print Network 3.0 - argon combined effects Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

density dEdx allows very... arXiv:hep-ex0408121v124Aug2004 Letter of Intent FLARE Fermilab Liquid ARgon Experiments Version 1... Oscillations Studies with the Off-axis...

209

E-Print Network 3.0 - argon gas backgrounds Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Appl. Phys. 38 (2005) 15771587 doi:10.10880022-37273810013 Summary: mixtures (with a gas density N) of methane and argon subjected to an external constant electric field E......

210

E-Print Network 3.0 - allene-doped liquid argon Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

sity 1.396 gcm3 , T 87 K) time projection chambers... that will be needed: argon gas and liquid inlets and ... Source: McDonald, Kirk - Department of Physics, Princeton...

211

E-Print Network 3.0 - argon 36 target Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Letter of Intent Summary: arXiv:hep-ex0408121v124Aug2004 Letter of Intent FLARE Fermilab Liquid ARgon Experiments Version 1... Oscillations Studies with the Off-axis...

212

E-Print Network 3.0 - argon lar scintillation Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Letter of Intent Summary: arXiv:hep-ex0408121v124Aug2004 Letter of Intent FLARE Fermilab Liquid ARgon Experiments Version 1... Oscillations Studies with the Off-axis...

213

E-Print Network 3.0 - argon 37 target Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Letter of Intent Summary: arXiv:hep-ex0408121v124Aug2004 Letter of Intent FLARE Fermilab Liquid ARgon Experiments Version 1... Oscillations Studies with the Off-axis...

214

E-Print Network 3.0 - argon isotopes Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

one of the earliest isotope... this is not always the case--see later). The naturally occurring isotopes of argon are measured by mass spectrometry... isotopes but also small...

215

E-Print Network 3.0 - argon isotopic chains Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

one of the earliest isotope... this is not always the case--see later). The naturally occurring isotopes of argon are measured by mass spectrometry... isotopes but also small...

216

E-Print Network 3.0 - argon gas injection Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

power, Pe;ped does not decrease appreciably after argon injection (not shown). The energy loss per... an ELM. Although a strong H-mode transport barrier is maintained with ......

217

E-Print Network 3.0 - argon 2s threshold Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Science 27 Laser noise compression by filamentation at 400 nm in argon Summary: intensity S2 remains stable. The fluctuations of S1 versus S2, S1 S2 , rise up to 5 in this...

218

E-Print Network 3.0 - argon ion laser Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

laser Search Powered by Explorit Topic List Advanced Search Sample search results for: argon ion laser Page: << < 1 2 3 4 5 > >> 1 1026 OPTICS LETTERS Vol. 15, No. 18 September...

219

E-Print Network 3.0 - argon storage tanks Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

storage tanks Search Powered by Explorit Topic List Advanced Search Sample search results for: argon storage tanks Page: << < 1 2 3 4 5 > >> 1 Large and Small (Far and Near) Liquid...

220

Characterization of argon arc source in the infrared J. M. Bridges and A. L. Migdall  

E-Print Network [OSTI]

metrologia Characterization of argon arc source in the infrared J. M. Bridges and A. L. Migdall path. Although a resistor of 0,25 is used for ignition, the arc requires no ballast during Metrologia

Migdall, Alan

Note: This page contains sample records for the topic "argon prototype detector" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

Work at FNAL to achieve long electron drift lifetime in liquid argon  

SciTech Connect (OSTI)

This note records some of the work done between July 2005 and July 2006 to achieve long (many milliseconds) electron drift lifetimes in liquid argon at Fermilab. The work is part of a process to develop some experience at Fermilab with the technology required to construct a large liquid argon TPC. This technology has been largely developed by the ICARUS collaboration in Europe and this process can be seen as technology transfer. The capability to produce liquid argon in which electrons have drift lifetimes of several milliseconds is crucial to a successful device. Liquid argon calorimeters have been successfully operated at Fermilab; their electro-negative contaminants are at the level of 10{sup -7} while the TPC we are considering requires a contamination level at the level of 10{sup -11}, tens of parts per trillion (ppt). As well as demonstrating the ability to produce liquid argon at this level of purity, the work is part of a program to test the effect on the electron drift time of candidate materials for the construction of a TPC in liquid argon.

Finley, D.; Jaskierny, W.; Kendziora, C.; Krider, J.; Pordes, S.; Rapidis, P.A.; Tope, T.; /Fermilab

2006-10-01T23:59:59.000Z

222

LANSCE Wire Scanner System Prototype: Switchyard Test  

SciTech Connect (OSTI)

On November 19, 2011, the beam diagnostics team of Los Alamos National Laboratory's LANSCE accelerator facility conducted a test of a prototype wire scanner system for future deployment within the accelerator's switchyard area. The primary focus of this test was to demonstrate the wire scanner control system's ability to extend its functionality beyond acquiring lower energy linac beam profile measurements to acquiring data in the switchyard. This study summarizes the features and performance characteristics of the electronic and mechanical implementation of this system with details focusing on the test results.

Sedillo, James D [Los Alamos National Laboratory

2012-04-11T23:59:59.000Z

223

Prototype dining hall energy efficiency study  

SciTech Connect (OSTI)

The energy consumption of food service facilities is among the highest of any commercial building type, owing to the special requirements for food preparation, sanitation, and ventilation. Consequently, the US Air Force Engineering and Services Center (AFESC) contracted with Pacific Northwest Laboratory (PNL) to collect and analyze end-use energy consumption data for a prototypical dining hall and make specific recommendations on cost-effective energy conservation options. This information will be used to establish or update criteria for dining hall designs and retrofits as appropriate. 6 refs., 21 figs., 23 tabs.

Mazzucchi, R.P.; Bailey, S.A.; Zimmerman, P.W.

1988-06-01T23:59:59.000Z

224

Prototyping of the ILC Baseline Positron Target  

SciTech Connect (OSTI)

The ILC positron system uses novel helical undulators to create a powerful photon beam from the main electron beam. This beam is passed through a titanium target to convert it into electron-positron pairs. The target is constructed as a 1 m diameter wheel spinning at 2000 RPM to smear the 1 ms ILC pulse train over 10 cm. A pulsed flux concentrating magnet is used to increase the positron capture efficiency. It is cooled to liquid nitrogen temperatures to maximize the flatness of the magnetic field over the 1 ms ILC pulse train. We report on prototyping effort on this system.

Gronberg, J; Brooksby, C; Piggott, T; Abbott, R; Javedani, J; Cook, E

2012-02-29T23:59:59.000Z

225

Pulse shapes from electron and photon induced events in segmented high-purity germanium detectors  

E-Print Network [OSTI]

Experiments built to search for neutrinoless double beta-decay are limited in their sensitivity not only by the exposure but also by the amount of background encountered. Radioactive isotopes in the surrounding of the detectors which emit gamma-radiation are expected to be a significant source of background in the GERmanium Detector Array, GERDA. Methods to select electron induced events and discriminate against photon induced events inside a germanium detector are presented in this paper. The methods are based on the analysis of the time structure of the detector response. Data were taken with a segmented GERDA prototype detector. It is shown that the analysis of the time response of the detector can be used to distinguish multiply scattered photons from electrons.

I. Abt; A. Caldwell; K. Kröninger; J. Liu; X. Liu; B. Majorovits

2007-04-23T23:59:59.000Z

226

Mechanically Cooled Large-Volume Germanium Detector Systems for Neclear Explosion Monitoring DOENA27323-2  

SciTech Connect (OSTI)

Compact maintenance free mechanical cooling systems are being developed to operate large volume high-resolution gamma-ray detectors for field applications. To accomplish this we are utilizing a newly available generation of Stirling-cycle mechanical coolers to operate the very largest volume germanium detectors with no maintenance. The user will be able to leave these systems unplugged on the shelf until needed. The maintenance-free operating lifetime of these detector systems will exceed 5 years. Three important factors affect the operation of mechanically cooled germanium detectors: temperature, vacuum, and vibration. These factors will be studied in the laboratory at the most fundamental levels to insure a solid understanding of the physical limitations each factor places on a practical mechanically cooled germanium detector system. Using this knowledge, mechanically cooled germanium detector prototype systems will be designed and fabricated.

Hull, E.L.

2006-10-30T23:59:59.000Z

227

DEPFET active pixel detectors for a future linear $e^+e^-$ collider  

E-Print Network [OSTI]

The DEPFET collaboration develops highly granular, ultra-transparent active pixel detectors for high-performance vertex reconstruction at future collider experiments. The characterization of detector prototypes has proven that the key principle, the integration of a first amplification stage in a detector-grade sensor material, can provide a comfortable signal to noise ratio of over 40 for a sensor thickness of 50-75 $\\mathrm{\\mathbf{\\mu m}}$. ASICs have been designed and produced to operate a DEPFET pixel detector with the required read-out speed. A complete detector concept is being developed, including solutions for mechanical support, cooling and services. In this paper the status of DEPFET R & D project is reviewed in the light of the requirements of the vertex detector at a future linear $\\mathbf{e^+ e^-}$ collider.

Alonso, O; Dieguez, A; Dingfelder, J; Hemperek, T; Kishishita, T; Kleinohl, T; Koch, M; Krueger, H; Lemarenko, M; Luetticke, F; Marinas, C; Schnell, M; Wermes, N; Campbell, A; Ferber, T; Kleinwort, C; Niebuhr, C; Soloviev, Y; Steder, M; Volkenborn, R; Yaschenko, S; Fischer, P; Kreidl, C; Peric, I; Knopf, J; Ritzert, M; Curras, E; Lopez-Virto, A; Moya, D; Vila, I; Boronat, M; Esperante, D; Fuster, J; Garcia Garcia, I; Lacasta, C; Oyanguren, A; Ruiz, P; Timon, G; Vos, M; Gessler, T; Kuehn, W; Lange, S; Muenchow, D; Spruck, B; Frey, A; Geisler, C; Schwenker, B; Wilk, F; Barvich, T; Heck, M; Heindl, S; Lutz, O; Mueller, Th; Pulvermacher, C; Simonis, H.J; Weiler, T; Krausser, T; Lipsky, O; Rummel, S; Schieck, J; Schlueter, T; Ackermann, K; Andricek, L; Chekelian, V; Chobanova, V; Dalseno, J; Kiesling, C; Koffmane, C; Gioi, L.Li; Moll, A; Moser, H.G; Mueller, F; Nedelkovska, E; Ninkovic, J; Petrovics, S; Prothmann, K; Richter, R; Ritter, A; Ritter, M; Simon, F; Vanhoefer, P; Wassatsch, A; Dolezal, Z; Drasal, Z; Kodys, P; Kvasnicka, P; Scheirich, J

2013-01-01T23:59:59.000Z

228

Detectors (5/5)  

ScienceCinema (OSTI)

This lecture will serve as an introduction to particle detectors and detection techniques. In the first lecture, a historic overview of particle detector development will be given. In the second lecture, some basic techniques and concepts for particle detection will be discussed. In the third lecture, the interaction of particles with matter, the basis of particle detection, will be presented. The fourth and fifth lectures will discuss different detector types used for particle tracking, energy measurement and particle identification.

None

2011-10-06T23:59:59.000Z

229

Detectors (4/5)  

ScienceCinema (OSTI)

This lecture will serve as an introduction to particle detectors and detection techniques. In the first lecture, a historic overview of particle detector development will be given. In the second lecture, some basic techniques and concepts for particle detection will be discussed. In the third lecture, the interaction of particles with matter, the basis of particle detection, will be presented. The fourth and fifth lectures will discuss different detector types used for particle tracking, energy measurement and particle identification.

None

2011-10-06T23:59:59.000Z

230

ALFA Detector Control System  

E-Print Network [OSTI]

ALFA (Absolute Luminosity For ATLAS) is one of the sub-detectors of ATLAS/LHC. The ALFA system is composed by two stations installed in the LHC tunnel 240 m away from each side of the ATLAS interaction point. Each station has a vacuum and ventilation system, movement control and all the required electronic for signal processing. The Detector Control System (DCS) provides control and monitoring of several components and ensures the safe operation of the detector contributing to good Data Quality. This paper describes the ALFA DCS system including a detector overview, operation aspects and hardware control through a SCADA system, WinCC OA.

Oleiro Seabra, Luis Filipe; The ATLAS collaboration

2015-01-01T23:59:59.000Z

231

Adaptors for radiation detectors  

DOE Patents [OSTI]

Described herein are adaptors and other devices for radiation detectors that can be used to make accurate spectral measurements of both small and large bulk sources of radioactivity, such as building structures, soils, vessels, large equipment, and liquid bodies. Some exemplary devices comprise an adaptor for a radiation detector, wherein the adaptor can be configured to collimate radiation passing through the adapter from an external radiation source to the radiation detector and the adaptor can be configured to enclose a radiation source within the adapter to allow the radiation detector to measure radiation emitted from the enclosed radiation source.

Livesay, Ronald Jason

2014-04-22T23:59:59.000Z

232

Detector Systems at CLIC  

E-Print Network [OSTI]

The Compact Linear Collider CLIC is designed to deliver e+e- collisions at a center of mass energy of up to 3 TeV. The detector systems at this collider have to provide highly efficient tracking and excellent jet energy resolution and hermeticity for multi-TeV final states with multiple jets and leptons. In addition, the detector systems have to be capable of distinguishing physics events from large beam-induced background at a crossing frequency of 2 GHz. Like for the detector concepts at the ILC, CLIC detectors are based on event reconstruction using particle flow algorithms. The two detector concepts for the ILC, ILD and SID, were adapted for CLIC using calorimeters with dense absorbers limiting leakage through increased compactness, as well as modified forward and vertex detector geometries and precise time stamping to cope with increased background levels. The overall detector concepts for CLIC are presented, with particular emphasis on the main detector and engineering challenges, such as: the ultra-thin vertex detector with high resolution and fast time-stamping, hadronic calorimetry using tungsten absorbers, and event reconstruction techniques related to particle flow algorithms and beam background suppression.

Frank Simon

2011-09-15T23:59:59.000Z

233

A Computuerized Operator Support System Prototype  

SciTech Connect (OSTI)

A report was published by the Idaho National Laboratory in September of 2012, entitled Design to Achieve Fault Tolerance and Resilience, which described the benefits of automating operator actions for transients. The report identified situations in which providing additional automation in lieu of operator actions would be advantageous. It recognized that managing certain plant upsets is sometimes limited by the operator’s ability to quickly diagnose the fault and to take the needed actions in the time available. Undoubtedly, technology is underutilized in the nuclear power industry for operator assistance during plant faults and operating transients. In contrast, other industry sectors have amply demonstrated that various forms of operator advisory systems can enhance operator performance while maintaining the role and responsibility of the operator as the independent and ultimate decision-maker. A computerized operator support system (COSS) is proposed for use in nuclear power plants to assist control room operators in addressing time-critical plant upsets. A COSS is a collection of technologies to assist operators in monitoring overall plant performance and making timely, informed decisions on appropriate control actions for the projected plant condition. The COSS does not supplant the role of the operator, but rather provides rapid assessments, computations, and recommendations to reduce workload and augment operator judgment and decision-making during fast-moving, complex events. This project proposes a general model for a control room COSS that addresses a sequence of general tasks required to manage any plant upset: detection, validation, diagnosis, recommendation, monitoring, and recovery. The model serves as a framework for assembling a set of technologies that can be interrelated to assist with each of these tasks. A prototype COSS has been developed in order to demonstrate the concept and provide a test bed for further research. The prototype is based on four underlying elements consisting of a digital alarm system, computer-based procedures, PI&D system representations, and a recommender module for mitigation actions. At this point, the prototype simulates an interface to a sensor validation module and a fault diagnosis module. These two modules will be fully integrated in the next version of the prototype. The initial version of the prototype is now operational at the Idaho National Laboratory using the U.S. Department of Energy’s Light Water Reactor Sustainability (LWRS) Human Systems Simulation Laboratory (HSSL). The HSSL is a full-scope, full-scale glass top simulator capable of simulating existing and future nuclear power plant main control rooms. The COSS is interfaced to the Generic Pressurized Water Reactor (gPWR) simulator with industry-typical control board layouts. The glass top panels display realistic images of the control boards that can be operated by touch gestures. A section of the simulated control board was dedicated to the COSS human-system interface (HSI), which resulted in a seamless integration of the COSS into the normal control room environment.

Ken Thomas; Ronald Boring; Roger Lew; Tom Ulrich; Richard Villim

2013-08-01T23:59:59.000Z

234

A Computuerized Operator Support System Prototype  

SciTech Connect (OSTI)

A report was published by the Idaho National Laboratory in September of 2012, entitled Design to Achieve Fault Tolerance and Resilience, which described the benefits of automating operator actions for transients. The report identified situations in which providing additional automation in lieu of operator actions would be advantageous. It recognized that managing certain plant upsets is sometimes limited by the operator’s ability to quickly diagnose the fault and to take the needed actions in the time available. Undoubtedly, technology is underutilized in the nuclear power industry for operator assistance during plant faults and operating transients. In contrast, other industry sectors have amply demonstrated that various forms of operator advisory systems can enhance operator performance while maintaining the role and responsibility of the operator as the independent and ultimate decision-maker. A computerized operator support system (COSS) is proposed for use in nuclear power plants to assist control room operators in addressing time-critical plant upsets. A COSS is a collection of technologies to assist operators in monitoring overall plant performance and making timely, informed decisions on appropriate control actions for the projected plant condition. The COSS does not supplant the role of the operator, but rather provides rapid assessments, computations, and recommendations to reduce workload and augment operator judgment and decision-making during fast-moving, complex events. This project proposes a general model for a control room COSS that addresses a sequence of general tasks required to manage any plant upset: detection, validation, diagnosis, recommendation, monitoring, and recovery. The model serves as a framework for assembling a set of technologies that can be interrelated to assist with each of these tasks. A prototype COSS has been developed in order to demonstrate the concept and provide a test bed for further research. The prototype is based on four underlying elements consisting of a digital alarm system, computer-based procedures, PI&D system representations, and a recommender module for mitigation actions. At this point, the prototype simulates an interface to a sensor validation module and a fault diagnosis module. These two modules will be fully integrated in the next version of the prototype. The initial version of the prototype is now operational at the Idaho National Laboratory using the U.S. Department of Energy’s Light Water Reactor Sustainability (LWRS) Human Systems Simulation Laboratory (HSSL). The HSSL is a full-scope, full-scale glass top simulator capable of simulating existing and future nuclear power plant main control rooms. The COSS is interfaced to the Generic Pressurized Water Reactor (gPWR) simulator with industry-typical control board layouts. The glass top panels display realistic images of the control boards that can be operated by touch gestures. A section of the simulated control board was dedicated to the COSS human-system interface (HSI), which resulted in a seamless integration of the COSS into the normal control room environment.

Ken Thomas; Ronald Boring; Roger Lew; Tom Ulrich; Richard Villim

2013-11-01T23:59:59.000Z

235

BPM Electronics based on Compensated Diode Detectors – Results from development Systems  

E-Print Network [OSTI]

High resolution beam position monitor (BPM) electronics based on diode peak detectors is being developed for processing signals from button BPMs embedded into future LHC collimators. Its prototypes were measured in a laboratory as well as with beam signals from the collimator BPM installed on the SPS and with LHC BPMs. Results from these measurements are presented and discussed.

Gasior, M; Steinhagen, RJ

2012-01-01T23:59:59.000Z

236

CX-010395: Categorical Exclusion Determination  

Broader source: Energy.gov [DOE]

A 35 Ton Liquid Argon Prototype Detector Will Be Built in Building PC-4 as a Prototype Detector for the Long Baseline Neutrino Experiment CX(s) Applied: B3.6 Date: 04/12/2012 Location(s): Illinois Offices(s): Fermi Site Office

237

First results from a 20-liter prototype dark matter detector with directional sensitivity  

E-Print Network [OSTI]

Astronomical and cosmological evidence suggests that 27% of the energy content of the universe is in the form of non-baryonic matter referred to as "dark matter." Weakly interacting massive particles have long been considered ...

Lopez, Jeremy Paul

2014-01-01T23:59:59.000Z

238

Development of a small angle hadron calorimeter prototype for the Collider Detector at Fermilab  

E-Print Network [OSTI]

made with Ar/CqHs when the ceramic wire supports replaced the fiberglass epoxy wire supports. Table 3. Comparative count rates with and with out Fe threshhold cuts Configuration Ar/CqHs &: PC Board Ar/CqHs &r AIOs Ar/COs &r PC Board Ar/COs &r... Zl Channel 511 0 1 256 Channel 511 Pu-Be 8c Ar/CO PC Board Tcp Layer ll Hov. 1988 Pu ? Be n Ar/Co Ceramtc Tcp Layer 13 Ncv. 1988 0. 5 n 0. 5 O 256 Channel 511 256 Channel 511 Figure 12. Comparative Energy Spectrum of top plane...

Thane, John Mark

1989-01-01T23:59:59.000Z

239

Prototype Detector and Chip Technology | U.S. DOE Office of Science (SC)  

Office of Science (SC) Website

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear SecurityTensile Strain Switched5 IndustrialIsadore Perlman,Bios HighRadiobiology:Princeton Plasma(SC)U.S.Source

240

Neutron Interactions as Seen by A Segmented Germanium Detector  

E-Print Network [OSTI]

The GERmanium Detector Array, GERDA, is designed for the search for ``neutrinoless double beta decay'' (0-nu-2-beta) with germanium detectors enriched in Ge76. An 18-fold segmented prototype detector for GERDA Phase II was exposed to an AmBe neutron source to improve the understanding of neutron induced backgrounds. Neutron interactions with the germanium isotopes themselves and in the surrounding materials were studied. Segment information is used to identify neutron induced peaks in the recorded energy spectra. The Geant4 based simulation package MaGe is used to simulate the experiment. Though many photon peaks from germanium isotopes excited by neutrons are correctly described by Geant4, some physics processes were identified as being incorrectly treated or even missing.

I. Abt; A. Caldwell; K. Kroeninger; J. Liu; X. Liu; B. Majorovits

2007-11-14T23:59:59.000Z

Note: This page contains sample records for the topic "argon prototype detector" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

Application of Geiger-mode photo sensors in Cherenkov detectors  

E-Print Network [OSTI]

Silicon-based photosensors (SiPMs) working in the Geiger-mode represent an elegant solution for the readout of particle detectors working at low-light levels like Cherenkov detectors. Especially the insensitivity to magnetic fields makes this kind of sensors suitable for modern detector systems in subatomic physics which are usually employing magnets for momentum resolution. In our institute we are characterizing SiPMs of different manufacturers for selecting sensors and finding optimum operating conditions for given applications. Recently we designed and built a light concentrator prototype with 8x8 cells to increase the active photon detection area of an 8x8 SiPM (Hamamatsu MPPC S10931-100P) array. Monte Carlo studies, measurements of the collection efficiency, and tests with the MPPC were carried out. The status of these developments are presented.

Gamal Ahmed; Paul Buehler; Michael Cargnelli; Roland Hohler; Johann Marton; Herbert Orth; Ken Suzuki

2010-08-31T23:59:59.000Z

242

Application of Geiger-mode photo sensors in Cherenkov detectors  

E-Print Network [OSTI]

Silicon-based photosensors (SiPMs) working in the Geiger-mode represent an elegant solution for the readout of particle detectors working at low-light levels like Cherenkov detectors. Especially the insensitivity to magnetic fields makes this kind of sensors suitable for modern detector systems in subatomic physics which are usually employing magnets for momentum resolution. In our institute we are characterizing SiPMs of different manufacturers for selecting sensors and finding optimum operating conditions for given applications. Recently we designed and built a light concentrator prototype with 8x8 cells to increase the active photon detection area of an 8x8 SiPM (Hamamatsu MPPC S10931-100P) array. Monte Carlo studies, measurements of the collection efficiency, and tests with the MPPC were carried out. The status of these developments are presented.

Ahmed, Gamal; Cargnelli, Michael; Hohler, Roland; Marton, Johann; Orth, Herbert; Suzuki, Ken

2010-01-01T23:59:59.000Z

243

The TESLA Detector  

E-Print Network [OSTI]

For the superconducting linear collider TESLA a multi purpose detector has been designed. This detector is optimised for the important physics processes expected at a next generation linear collider up to around 1 TeV and is designed for the specific environment of a superconducting collider.

Klaus Moenig

2001-11-05T23:59:59.000Z

244

A new detector for mass spectrometry: Direct detection of low energy ions using a multi-pixel photon counter  

SciTech Connect (OSTI)

A new type of ion detector for mass spectrometry and general detection of low energy ions is presented. The detector consists of a scintillator optically coupled to a single-photon avalanche photodiode (SPAD) array. A prototype sensor has been constructed from a LYSO (Lu{sub 1.8}Y{sub 0.2}SiO{sub 5}(Ce)) scintillator crystal coupled to a commercial SPAD array detector. As proof of concept, the detector is used to record the time-of-flight mass spectra of butanone and carbon disulphide, and the dependence of detection sensitivity on the ion kinetic energy is characterised.

Wilman, Edward S.; Gardiner, Sara H.; Vallance, Claire [Department of Chemistry, University of Oxford, Chemistry Research Laboratory, 12 Mansfield Rd, Oxford OX1 3TA (United Kingdom); Nomerotski, Andrei [Department of Physics, University of Oxford, Denys Wilkinson Building, Keble Rd, Oxford OX1 3RH (United Kingdom); Turchetta, Renato [Rutherford Appleton Laboratory, Chilton, Didcot, Oxfordshire OX11 0QX (United Kingdom); Brouard, Mark [Department of Chemistry, University of Oxford, Physical and Theoretical Chemistry Laboratory, South Parks Rd, Oxford OX1 3QZ (United Kingdom)

2012-01-15T23:59:59.000Z

245

Hit time and hit position reconstruction in the J-PET detector based on a library of averaged model signals  

E-Print Network [OSTI]

In this article we present a novel method of hit time and hit position reconstruction in long scintillator detectors. We take advantage of the fact that for this kind of detectors amplitude and shape of registered signals depends strongly on the position where particle hit the detector. The reconstruction is based on determination of the degree of similarity between measured and averaged signals stored in a library for a set of well-defined positions along the scintillator. Preliminary results of validation of the introduced method with experimental data obtained by means of the double strip prototype of the J-PET detector are presented.

Moskal, P; Silarski, M; Bednarski, T; Bia?as, P; Bu?ka, J; Czerwi?ski, E; Gajos, A; Kami?ska, D; Kap?on, L; Kochanowski, A; Korcyl, G; Kowal, J; Kowalski, P; Kozik, T; Krzemie?, W; Kubicz, E; Nied?wiecki, Sz; Pa?ka, M; Raczy?ski, L; Rudy, Z; Rundel, O; Salabura, P; S?omski, A; Smyrski, J; Strzelecki, A; Wieczorek, A; Wi?licki, W; Wochlik, I; Zieli?ski, M; Zo?, N

2015-01-01T23:59:59.000Z

246

Nanomechanical resonance detector  

DOE Patents [OSTI]

An embodiment of a nanomechanical frequency detector includes a support structure and a plurality of elongated nanostructures coupled to the support structure. Each of the elongated nanostructures has a particular resonant frequency. The plurality of elongated nanostructures has a range of resonant frequencies. An embodiment of a method of identifying an object includes introducing the object to the nanomechanical resonance detector. A resonant response by at least one of the elongated nanostructures of the nanomechanical resonance detector indicates a vibrational mode of the object. An embodiment of a method of identifying a molecular species of the present invention includes introducing the molecular species to the nanomechanical resonance detector. A resonant response by at least one of the elongated nanostructures of the nanomechanical resonance detector indicates a vibrational mode of the molecular species.

Grossman, Jeffrey C; Zettl, Alexander K

2013-10-29T23:59:59.000Z

247

Aluminum tunnel junction detector operation in an adiabatic demagnetization refrigerator  

SciTech Connect (OSTI)

Superconducting tunnel junction detectors are being developed as both particle and X-ray detectors. Aluminum junctions are desirable for detectors because of their strong native oxide barriers, and because the small energy gap of aluminum is a good match to ballistic phonons generated by particle interactions in single crystals of silicon or other low acoustic-loss insulating crystals. Aluminum tunnel junction detectors must be operated near 0.1 T{sub C} which is 110 mK for aluminum. To operate detectors at these temperatures, we have developed adiabatic demagnetization refrigerators (ADRs) for the laboratory and prototype ADRs for space based operation. These cryogenic systems are simpler, more convenient and more portable than most dilution refrigerators. We have demonstrated that the magnetic field of the ADR need not compromise the performance of aluminum tunnel junctions. We have recently initiated a program to develop superconducting tunnel junctions (STJs) as high resolution X-ray detectors and low energy threshold particle detectors. This complements our existing program in which we are developing high resolution X-ray microcalorimeter detectors. One of our goals for both of these cryogenic detector development efforts is to observe X-ray emission from cosmic sources. This requires a refrigeration system that can operate under zero gravity space flight conditions. For the microcalorimeter project, temperatures of 100 mK and below are required to sufficiently reduce the heat capacity of the device. We have therefore developed an adiabatic demagnetization refrigerator (ADR) system which can be configured for space flight.

Labov, S.; Silver, E.; Le Gros, M. (Lawrence Livermore National Lab., CA (United States)); Bland, R.W.; Dickson, S.C.; Dignan, T.G.; Laws, K.; Johnson, R.T.; Simon, M.W.; Stricker, D.A.; Watson, R.M. (San Francisco State Univ., CA (United States)); Madden, N.; Landis, D. (Lawrence Berkeley Lab., CA (United States))

1992-01-30T23:59:59.000Z

248

EMC Diagnosis and Corrective Actions for Silicon Strip Tracker Detectors  

SciTech Connect (OSTI)

The tracker sub-system is one of the five sub-detectors of the Compact Muon Solenoid (CMS) experiment under construction at CERN for the Large Hadron Collider (LHC) accelerator. The tracker subdetector is designed to reconstruct tracks of charged sub-atomic particles generated after collisions. The tracker system processes analogue signals from 10 million channels distributed across 14000 silicon micro-strip detectors. It is designed to process signals of a few nA and digitize them at 40 MHz. The overall sub-detector is embedded in a high particle radiation environment and a magnetic field of 4 Tesla. The evaluation of the electromagnetic immunity of the system is very important to optimize the performance of the tracker sub-detector and the whole CMS experiment. This paper presents the EMC diagnosis of the CMS silicon tracker sub-detector. Immunity tests were performed using the final prototype of the Silicon Tracker End-Caps (TEC) system to estimate the sensitivity of the system to conducted noise, evaluate the weakest areas of the system and take corrective actions before the integration of the overall detector. This paper shows the results of one of those tests, that is the measurement and analysis of the immunity to CM external conducted noise perturbations.

Arteche, F.; /CERN /Imperial Coll., London; Rivetta, C.; /SLAC

2006-06-06T23:59:59.000Z

249

Prototype system brings advantages of wireless technology to...  

National Nuclear Security Administration (NNSA)

Advantages of wireless, compared to a wired system, include lower cost, greater reliability and freedom of movement. Read more. Prototype system brings advantages of wireless...

250

Development and Demonstration of a Prototype Omnivorous Engine  

Broader source: Energy.gov (indexed) [DOE]

of a Prototype Omnivorous Engine Christopher Cooney, Thomas Wallner, Steve McConnell Argonne National Laboratory DEER 2009 - Directions in Engine - Efficiency and Emissions...

251

PROTOTYPE PROGRAMMATIC AGREEMENT BETWEEN THE UNITED STATES DEPARTMENT...  

Energy Savers [EERE]

and Conservation Block Grant Program, the State Energy Plan, and the Weatherization Assistance Program. PROTOTYPE PROGRAMMATIC AGREEMENT BETWEEN THE UNITED STATES DEPARTMENT OF...

252

MATLAB tensor classes for fast algorithm prototyping.  

SciTech Connect (OSTI)

Tensors (also known as mutidimensional arrays or N-way arrays) are used in a variety of applications ranging from chemometrics to psychometrics. We describe four MATLAB classes for tensor manipulations that can be used for fast algorithm prototyping. The tensor class extends the functionality of MATLAB's multidimensional arrays by supporting additional operations such as tensor multiplication. The tensor as matrix class supports the 'matricization' of a tensor, i.e., the conversion of a tensor to a matrix (and vice versa), a commonly used operation in many algorithms. Two additional classes represent tensors stored in decomposed formats: cp tensor and tucker tensor. We descibe all of these classes and then demonstrate their use by showing how to implement several tensor algorithms that have appeared in the literature.

Bader, Brett William; Kolda, Tamara Gibson (Sandia National Laboratories, Livermore, CA)

2004-10-01T23:59:59.000Z

253

PERFORMANCE OF THE CEBAF PROTOTYPE CRYOMODULE RENASCENCE  

SciTech Connect (OSTI)

The prototype cryomodule Renascence was constructed as an energy building block for securing 6 GeV operation of CEBAF and to validate design elements for future CEBAF upgrade modules. These elements include the new “HG” and “LL” 7-cell cavity designs and a new tuner design.[1,2] Issues were identified during initial testing in 2005. The module has been reworked to address the issues with thermal stability, component breakage, and tuner motion. In addition, opportunity was taken to employ upgraded cleaning and assembly techniques for the cavity string. The HOM coupler heating issue was resolved, and seven of the eight cavities in the cryomodule have run stably at an average of 20 MV/m CW. The cryogenic, rf, and mechanical performance of the cryomodule are presented. Commissioning in CEBAF has just been completed in October 2007.

Charles Reece; Edward Daly; G. Davis; Michael Drury; William Hicks; Joseph Preble; Haipeng Wang

2008-02-12T23:59:59.000Z

254

Test of Two NB Superstructure Prototypes  

SciTech Connect (OSTI)

An alternative layout of the TESLA linear collider [1], based on weakly coupled multi-cell superconducting structures (superstructures), significantly reduces investment cost due to a simplification in the RF system of the main accelerator. In January 1999, preparation of the beam test of the superstructure began in order to prove the feasibility of this layout. Progress in the preparation was reported frequently in Proceedings of TESLA Collaboration Meetings. Last year, two superstructures were installed in the TESLA Test Facility (TTF) linac at DESY to experimentally verify: methods to balance the accelerating gradient in a weakly coupled system, the stability of the energy gain for the entire train of bunches in macro-pulses and the damping of Higher Order Modes (HOMs). We present results of the first cold and beam test of these two Nb prototypes.

Sekutowicz, J.

2004-04-16T23:59:59.000Z

255

A Detailed Study of FDIRC Prototype with Waveform Digitizing Electronics in Cosmic Ray Telescope Using 3D Tracks.  

SciTech Connect (OSTI)

We present a detailed study of a novel Cherenkov imaging detector called the Focusing DIRC (FDIRC) with waveform digitizing electronics. In this test study, the FDIRC prototype has been instrumented with seven Hamamatsu H-8500 MaPMTs. Waveforms from ~450 pixels are digitized with waveform sampling electronics based on the BLAB2 ASIC, operating at a sampling speed of ~2.5 GSa/s. The FDIRC prototype was tested in a large cosmic ray telescope (CRT) providing 3D muon tracks with ~1.5 mrad angular resolution and muon energy of Emuon greater than 1.6 GeV. In this study we provide a detailed analysis of the tails in the Cherenkov angle distribution as a function of various variables, compare experimental results with simulation, and identify the major contributions to the tails. We demonstrate that to see the full impact of these tails on the Cherenkov angle resolution, it is crucial to use 3D tracks, and have a full understanding of the role of ambiguities. These issues could not be fully explored in previous FDIRC studies where the beam was perpendicular to the quartz radiator bars. This work is relevant for the final FDIRC prototype of the PID detector at SuperB, which will be tested this year in the CRT setup.

Nishimura, K

2012-07-01T23:59:59.000Z

256

A Detailed Study of FDIRC Prototype with Waveform Digitizing Electronics in Cosmic Ray Telescope Using 3D Tracks  

SciTech Connect (OSTI)

We present a detailed study of a novel Cherenkov imaging detector called the Focusing DIRC (FDIRC) with waveform digitizing electronics. In this test study, the FDIRC prototype has been instrumented with seven Hamamatsu H-8500 MaPMTs. Waveforms from {approx}450 pixels are digitized with waveform sampling electronics based on the BLAB2 ASIC, operating at a sampling speed of {approx}2.5 GSa/s. The FDIRC prototype was tested in a large cosmic ray telescope (CRT) providing 3D muon tracks with {approx}1.5 mrad angular resolution and muon energy of E{sub muon} > 1.6 GeV. In this study we provide a detailed analysis of the tails in the Cherenkov angle distribution as a function of various variables, compare experimental results with simulation, and identify the major contributions to the tails. We demonstrate that to see the full impact of these tails on the Cherenkov angle resolution, it is crucial to use 3D tracks, and have a full understanding of the role of ambiguities. These issues could not be fully explored in previous FDIRC studies where the beam was perpendicular to the quartz radiator bars. This work is relevant for the final FDIRC prototype of the PID detector at SuperB, which will be tested this year in the CRT setup.

Nishimura, K.; Dey, B.; /Hawaii U. /UC, Riverside; Aston, D.; Leith, D.W.G.S.; Ratcliff, B.; /SLAC; Roberts, D.; /Maryland U.; Ruckman, L.; /Hawaii U.; Shtol, D.; /Novosibirsk, IYF; Varner, G.S.; /Hawaii U.; Va'vra, J.; Vavra, Jerry; /SLAC; ,

2012-07-30T23:59:59.000Z

257

Operation of a high purity germanium crystal in liquid argon as a Compton suppressed radiation spectrometer  

E-Print Network [OSTI]

A high purity germanium crystal was operated in liquid argon as a Compton suppressed radiation spectrometer. Spectroscopic quality resolution of less than 1% of the full-width half maximum of full energy deposition peaks was demonstrated. The construction of the small apparatus used to obtain these results is reported. The design concept is to use the liquid argon bath to both cool the germanium crystal to operating temperatures and act as a scintillating veto. The scintillation light from the liquid argon can veto cosmic-rays, external primordial radiation, and gamma radiation that does not fully deposit within the germanium crystal. This technique was investigated for its potential impact on ultra-low background gamma-ray spectroscopy. This work is based on a concept initially developed for future germanium-based neutrinoless double-beta decay experiments.

John L. Orrell; Craig E. Aalseth; John F. Amsbaugh; Peter J. Doe; Todd W. Hossbach

2006-10-11T23:59:59.000Z

258

Lattice gas model for fragmentation: From Argon on Scandium to Gold on Gold  

E-Print Network [OSTI]

The recent fragmentation data for central collisions of Gold on Gold are even qualitatively different from those for central collisions of Argon on Scandium. The latter can be fitted with a lattice gas model calculation. Effort is made to understand why the model fails for Gold on Gold. The calculation suggests that the large Coulomb interaction which is operative for the larger system is responsible for this discrepancy. This is demonstrated by mapping the lattice gas model to a molecular dynamics calculation for disassembly. This mapping is quite faithful for Argon on Scandium but deviates strongly for Gold on Gold. The molecular dynamics calculation for disassembly reproduces the characteristics of the fragmentation data for both Gold on Gold and Argon on Scandium.

Subal Das Gupta; Jicai Pan

1995-12-20T23:59:59.000Z

259

Layered semiconductor neutron detectors  

DOE Patents [OSTI]

Room temperature operating solid state hand held neutron detectors integrate one or more relatively thin layers of a high neutron interaction cross-section element or materials with semiconductor detectors. The high neutron interaction cross-section element (e.g., Gd, B or Li) or materials comprising at least one high neutron interaction cross-section element can be in the form of unstructured layers or micro- or nano-structured arrays. Such architecture provides high efficiency neutron detector devices by capturing substantially more carriers produced from high energy .alpha.-particles or .gamma.-photons generated by neutron interaction.

Mao, Samuel S; Perry, Dale L

2013-12-10T23:59:59.000Z

260

Boltzmann expansion in a radiofrequency conical helicon thruster operating in xenon and argon  

SciTech Connect (OSTI)

A low pressure ({approx}0.5 mTorr in xenon and {approx}1 mTorr in argon) Boltzmann expansion is experimentally observed on axis within a magnetized (60 to 180 G) radiofrequency (13.56 MHz) conical helicon thruster for input powers up to 900 W using plasma parameters measured with a Langmuir probe. The axial forces, respectively, resulting from the electron and magnetic field pressures are directly measured using a thrust balance for constant maximum plasma pressure and show a higher fuel efficiency for argon compared to xenon.

Charles, C.; Boswell, R. [Space Plasma, Power and Propulsion Laboratory, Research School of Physics and Engineering, The Australian National University, Canberra, ACT 0200 (Australia)] [Space Plasma, Power and Propulsion Laboratory, Research School of Physics and Engineering, The Australian National University, Canberra, ACT 0200 (Australia); Takahashi, K. [Space Plasma, Power and Propulsion Laboratory, Research School of Physics and Engineering, The Australian National University, Canberra, ACT 0200 (Australia) [Space Plasma, Power and Propulsion Laboratory, Research School of Physics and Engineering, The Australian National University, Canberra, ACT 0200 (Australia); Department of Electrical Engineering, Tohoku University, Sendai 980-9579 (Japan)

2013-06-03T23:59:59.000Z

Note: This page contains sample records for the topic "argon prototype detector" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

Energy of the quasi-free electron in supercritical argon near the critical point C.M. Evans1,  

E-Print Network [OSTI]

Energy of the quasi-free electron in supercritical argon near the critical point C.M. Evans1 to the interaction between argon and the quasi-free electron arising from field ionization of the dopant. The energy by the ionic core, V0(P) is the quasi-free electron energy in the perturbing medium, and P is the perturber

Evans, Cherice M.

262

Argon: performance insulation for shared storage servers Matthew Wachs, Michael Abd-El-Malek, Eno Thereska, Gregory R. Ganger  

E-Print Network [OSTI]

Argon: performance insulation for shared storage servers Matthew Wachs, Michael Abd-El-Malek, Eno) of the throughput it would get alone. Argon uses automatically- configured prefetch/write-back sizes to insulate services, based on their observed access patterns, to insulate the hit rate each achieves from the access

263

Laser propagation and energy absorption by an argon spark C. V. Bindhu, S. S. Harilal,a)  

E-Print Network [OSTI]

Laser propagation and energy absorption by an argon spark C. V. Bindhu, S. S. Harilal,a) M. S The laser propagation and energy absorption of an argon spark induced by a laser at different pressures is investigated. 8 ns pulses from a frequency-doubled Q-switched Nd:YAG laser are used to create the spark

Tillack, Mark

264

Seamless Energy Management Systems Part II: Development of Prototype  

E-Print Network [OSTI]

Seamless Energy Management Systems Part II: Development of Prototype Core Elements Final Project System #12;#12;Seamless Energy Management Systems Part II: Development of Prototype Core Elements Final Center (PSERC) research project entitled "Seamless Energy Management Systems" (S-53G for 2013

265

Development of Wind Turbines Prototyping Software Under Matlab/Simulink  

E-Print Network [OSTI]

204 1 Development of Wind Turbines Prototyping Software Under Matlab/Simulink® Through present the development of a wind turbine prototyping software under Matlab/Simulink® through and the end of 1999, around 75% of all new grid-connected wind turbines worldwide were installed in Europe [3

Paris-Sud XI, Université de

266

WP3 Prototype development for operational planning tool  

E-Print Network [OSTI]

WP3 Prototype development for operational planning tool Kristoffersen, T., Meibom, P., Risø DTU: Kristoffersen, T., Meibom, P. Title: WP3 Prototype development for operational planning tool Department: System and forced outages in the two main components of the Wilmar Planning tool namely the Scenario Tree Tool

267

Creating Works-Like Prototypes of Mechanical Objects Bongjin Koo  

E-Print Network [OSTI]

of creating works-like prototypes. Designers are increasingly turning to 3D printing as a tool for fab Graphics]: Computational Ge- ometry and Object Modeling--Geometric algorithms. Keywords: fabrication, 3D printing, sketch-based modeling Links: DL PDF WEB VIDEO 1 Introduction Creating physical prototypes

Agrawala, Maneesh

268

Large area silicon drift detectors for x-rays -- New results  

SciTech Connect (OSTI)

Large area silicon drift detectors, consisting of 8 mm and 12 mm diameter hexagons, were fabricated on 0.35 mm thick high resistivity n-type silicon. An external FET and a low-noise charge sensitive preamplifier were used for testing the prototype detectors. The detector performance was measured in the range 75 to 25 C using Peltier cooling, and from 0.125 to 6 {micro}s amplifier shaping time. Measured energy resolutions were 159 eV FWHM and 263 eV FWHM for the 0.5 cm{sup 2} and 1 cm{sup 2} detectors, respectively (at 5.9 keV, {minus}75 C, 6 {micro}s shaping time). The uniformity of the detector response over the entire active area (measured using 560 nm light) was < 0.5%.

Iwanczyk, J.S.; Patt, B.E.; Tull, C.R.; Segal, J.D. [Photon Imaging, Inc., Northridge, CA (United States); Kenney, C.J. [Univ. of Hawaii, Honolulu, HI (United States). Dept. of Physics; Bradley, J. [Jet Propulsion Lab., Pasadena, CA (United States); Hedman, B.; Hodgson, K.O. [Stanford Univ., CA (United States)

1998-12-31T23:59:59.000Z

269

Pendulum detector testing device  

DOE Patents [OSTI]

A detector testing device which provides consistent, cost-effective, repeatable results. The testing device is primarily constructed of PVC plastic and other non-metallic materials. Sensitivity of a walk-through detector system can be checked by: 1) providing a standard test object simulating the mass, size and material content of a weapon or other contraband, 2) suspending the test object in successive positions, such as head, waist and ankle levels, simulating where the contraband might be concealed on a person walking through the detector system; and 3) swinging the suspended object through each of the positions, while operating the detector system and observing its response. The test object is retained in a holder in which the orientation of the test device or target can be readily changed, to properly complete the testing requirements.

Gonsalves, John M. (Modesto, CA)

1997-01-01T23:59:59.000Z

270

Pendulum detector testing device  

DOE Patents [OSTI]

A detector testing device is described which provides consistent, cost-effective, repeatable results. The testing device is primarily constructed of PVC plastic and other non-metallic materials. Sensitivity of a walk-through detector system can be checked by: (1) providing a standard test object simulating the mass, size and material content of a weapon or other contraband, (2) suspending the test object in successive positions, such as head, waist and ankle levels, simulating where the contraband might be concealed on a person walking through the detector system; and (3) swinging the suspended object through each of the positions, while operating the detector system and observing its response. The test object is retained in a holder in which the orientation of the test device or target can be readily changed, to properly complete the testing requirements. 5 figs.

Gonsalves, J.M.

1997-09-30T23:59:59.000Z

271

Pocked surface neutron detector  

DOE Patents [OSTI]

The detection efficiency, or sensitivity, of a neutron detector material such as of Si, SiC, amorphous Si, GaAs, or diamond is substantially increased by forming one or more cavities, or holes, in its surface. A neutron reactive material such as of elemental, or any compound of, .sup.10 B, .sup.6 Li, .sup.6 LiF, U, or Gd is deposited on the surface of the detector material so as to be disposed within the cavities therein. The portions of the neutron reactive material extending into the detector material substantially increase the probability of an energetic neutron reaction product in the form of a charged particle being directed into and detected by the neutron detector material.

McGregor, Douglas (Whitmore Lake, MI); Klann, Raymond (Bolingbrook, IL)

2003-04-08T23:59:59.000Z

272

Ultrafast neutron detector  

DOE Patents [OSTI]

A neutron detector of very high temporal resolution is described. It may be used to measure distributions of neutrons produced by fusion reactions that persist for times as short as about 50 picoseconds.

Wang, C.L.

1985-06-19T23:59:59.000Z

273

Modular optical detector system  

DOE Patents [OSTI]

A modular optical detector system. The detector system is designed to detect the presence of molecules or molecular species by inducing fluorescence with exciting radiation and detecting the emitted fluorescence. Because the system is capable of accurately detecting and measuring picomolar concentrations it is ideally suited for use with microchemical analysis systems generally and capillary chromatographic systems in particular. By employing a modular design, the detector system provides both the ability to replace various elements of the detector system without requiring extensive realignment or recalibration of the components as well as minimal user interaction with the system. In addition, the modular concept provides for the use and addition of a wide variety of components, including optical elements (lenses and filters), light sources, and detection means, to fit particular needs.

Horn, Brent A. (Livermore, CA); Renzi, Ronald F. (Tracy, CA)

2006-02-14T23:59:59.000Z

274

Development of A Self Biased High Efficiency Solid-State Neutron Detector for MPACT Applications  

SciTech Connect (OSTI)

Neutron detection is an important aspect of materials protection, accounting, and control for transmutation (MPACT). Currently He-3 filled thermal neutron detectors are utilized in many applications; these detectors require high-voltage bias for operation, which complicates the system when multiple detectors are used. In addition, due to recent increase in homeland security activity and the nuclear renaissance, there is a shortage of He-3, and these detectors become more expensive. Instead, cheap solid-state detectors that can be mass produced like any other computer chips will be developed. The new detector does not require a bias for operation, has low gamma sensitivity, and a fast response. The detection system is based on a honeycomb-like silicon device, which is filled with B-10 as the neutron converter; while a silicon p-n diode (i.e., solar cell type device) formed on the thin silicon wall of the honeycomb structure detects the energetic charged particles emitted from the B-10 conversion layer. Such a detector has ~40% calculated thermal neutron detection efficiency with an overall detector thickness of about 200 ?m. Stacking of these devices allows over 90% thermal neutron detection efficiency. The goal of the proposed research is to develop a high-efficiency, low-noise, self-powered solid-state neutron detector system based on the promising results of the existing research program. A prototype of this solid-state neutron detector system with sufficient detector size (up to 8-inch diam., but still portable and inexpensive) and integrated with interface electronics (e.g., preamplifier) will be designed, fabricated, and tested as a coincidence counter for MPACT applications. All fabrications proposed are based on silicon-compatible processing; thus, an extremely cheap detector system could be massively produced like any other silicon chips. Such detectors will revolutionize current neutron detection systems by providing a solid-state alternative to traditional gas-based neutron detectors.

Danon, Yaron; Bhat, Ishwara; Jian-Qiang Lu, James

2013-09-03T23:59:59.000Z

275

Enhancements to ASHRAE Standard 90.1 Prototype Building Models  

SciTech Connect (OSTI)

This report focuses on enhancements to prototype building models used to determine the energy impact of various versions of ANSI/ASHRAE/IES Standard 90.1. Since the last publication of the prototype building models, PNNL has made numerous enhancements to the original prototype models compliant with the 2004, 2007, and 2010 editions of Standard 90.1. Those enhancements are described here and were made for several reasons: (1) to change or improve prototype design assumptions; (2) to improve the simulation accuracy; (3) to improve the simulation infrastructure; and (4) to add additional detail to the models needed to capture certain energy impacts from Standard 90.1 improvements. These enhancements impact simulated prototype energy use, and consequently impact the savings estimated from edition to edition of Standard 90.1.

Goel, Supriya; Athalye, Rahul A.; Wang, Weimin; Zhang, Jian; Rosenberg, Michael I.; Xie, YuLong; Hart, Philip R.; Mendon, Vrushali V.

2014-04-16T23:59:59.000Z

276

Improved gaseous leak detector  

DOE Patents [OSTI]

In a short path length mass-spectrometer type of helium leak detector wherein the helium trace gas is ionized, accelerated and deflected onto a particle counter, an arrangement is provided for converting the detector to neon leak detection. The magnetic field of the deflection system is lowered so as to bring the nonlinear fringe area of the magnetic field across the ion path, thereby increasing the amount of deflection of the heavier neon ions.

Juravic, F.E. Jr.

1983-10-06T23:59:59.000Z

277

Gaseous leak detector  

DOE Patents [OSTI]

In a short path length mass-spectrometer type of helium leak detector wherein the helium trace gas is ionized, accelerated and deflected onto a particle counter, an arrangement is provided for converting the detector to neon leak detection. The magnetic field of the deflection system is lowered so as to bring the non linear fringe area of the magnetic field across the ion path, thereby increasing the amount of deflection of the heavier neon ions.

Juravic, Jr., Frank E. (Aurora, IL)

1988-01-01T23:59:59.000Z

278

Sensitivity of DANSS detector to short range neutrino oscillations  

E-Print Network [OSTI]

DANSS is a highly segmented $1m^3$ plastic scintillator detector. Its 2500 scintillator strips have a Gd loaded reflective cover. Light is collected with 3 wave length shifting fibers per strip and read out with 50 PMTs and 2500 SiPMs. The DANSS will be installed under the industrial 3GW$_{th}$ reactor of the Kalinin Nuclear Power Plant at distances varying from 9.7m to 12.2m from the reactor core. PMTs and SiPMs collect about 30 photo electrons per MeV distributed approximately equally between two types of the readout. Light collection non-uniformity across and along the strip is about $\\pm13\\%$ from maximum to minimum. The resulting energy resolution is modest, $\\sigma/E=15\\%$ at 5MeV. This leads to a smearing of the oscillation pattern comparable with the smearing due to the large size of the reactor core. Nevertheless because of the large counting rate ($\\sim 10000$ / day), small background ($Tests of the detector prototype DANSSino demonstrated that in spite of a small size ($4\\%$ of DANSS), it is quite sensitive to reactor antineutrinos, detecting about 70 Inverse Beta Decay events per day with the signal-to-background ratio of about unity. The prototype tests have demonstrated feasibility to reach the design performance of the DANSS detector.

Mikhail Danilov

2014-12-02T23:59:59.000Z

279

Multidimensional Simulation of Plasma in Argon through a Shock in Hypersonic Flow  

E-Print Network [OSTI]

Multidimensional Simulation of Plasma in Argon through a Shock in Hypersonic Flow Amrita K. Lonkar in gases at hypersonic speeds. A plasma is composed of multiple species in thermo-chemical nonequlibrium major advancements in the field of hypersonics in the past quarter century. Rocket- powered launch

Alonso, Juan J.

280

Multidimensional Simulation of Plasma in Argon through a Shock in Hypersonic Flow  

E-Print Network [OSTI]

Multidimensional Simulation of Plasma in Argon through a Shock in Hypersonic Flow Amrita K. Lonkar in gases at hypersonic speeds. A plasma is composed of multiple species in thermo-chemical nonequlibrium of hypersonics in the past quarter century. Rocket- powered launch vehicles typically achieve hypersonic speeds

Alonso, Juan J.

Note: This page contains sample records for the topic "argon prototype detector" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

Non-local thermodynamic equilibrium effects on isentropic coefficient in argon and helium thermal plasmas  

SciTech Connect (OSTI)

In the present work, two cases of thermal plasma have been considered; the ground state plasma in which all the atoms and ions are assumed to be in the ground state and the excited state plasma in which atoms and ions are distributed over various possible excited states. The variation of Z?, frozen isentropic coefficient and the isentropic coefficient with degree of ionization and non-equilibrium parameter ?(= T{sub e}/T{sub h}) has been investigated for the ground and excited state helium and argon plasmas at pressures 1?atm, 10?atm, and 100?atm in the temperature range from 6000?K to 60?000?K. For a given value of non-equilibrium parameter, the relationship of Z? with degree of ionization does not show any dependence on electronically excited states in helium plasma whereas in case of argon plasma this dependence is not appreciable till degree of ionization approaches 2. The minima of frozen isentropic coefficient shifts toward lower temperature with increase of non-equilibrium parameter for both the helium and argon plasmas. The lowering of non-equilibrium parameter decreases the frozen isentropic coefficient more emphatically in helium plasma at high pressures in comparison to argon plasma. The increase of pressure slightly reduces the ionization range over which isentropic coefficient almost remains constant and it does not affect appreciably the dependence of isentropic coefficient on non-equilibrium parameter.

Sharma, Rohit [Satyam Institute of Engineering and Technology, Amritsar 143107 (India)] [Satyam Institute of Engineering and Technology, Amritsar 143107 (India); Singh, Kuldip [Department of Physics, Guru Nanak Dev University, Amritsar 143005 (India)] [Department of Physics, Guru Nanak Dev University, Amritsar 143005 (India)

2014-03-15T23:59:59.000Z

282

Lattice Boltzmann Computation of Plasma Jet Behaviors : part II Argon-Nitrogen Mixture  

E-Print Network [OSTI]

the applications to simulating flows with temperature-dependent diffusion parameters (viscosity and diffusivity. Argon and Nitrogen are two gases of the most ones used in plasma spraying. The mixture is used when spraying. Our numerical results based on the centerline temperature and velocity profiles, its

Paris-Sud XI, Université de

283

A prototype compton camera for in-vivo dosimetry of ion beam cancer irradiation  

SciTech Connect (OSTI)

Three-dimensional in-vivo dose monitoring of ion beam cancer irradiation can improve the quality of treatment. For this purpose we investigate the feasibility of imaging the single photon emissions due to nuclear reactions of projectiles with target nuclei (in-beam SPECT). A suitable imaging technique in the energy range of the emitted gamma rays is the Compton camera. A prototype based on prior simulations is currently under construction. Te system comprises two CdZnTe cross-strip detectors with steering grid and depth-of-interaction capability and one segmented LSO scintillator crystal with modified Anger light readout. We present the concept of the system including the front-end and DAQ electronics as well as first measurements. (authors)

Kormoll, T. [Technische Universitaet Dresden, OncoRay, PF 86, 013307 Dresden (Germany); Fiedler, F. [Helmholtzzentrum Dresden-Rossendorf, Inst. of Radiation Physics, PF 5103119, 013314 Dresden (Germany); Golnik, C. [Technische Universitaet Dresden, OncoRay, PF 86, 013307 Dresden (Germany); Heidel, K.; Kempe, M. [Helmholtzzentrum Dresden-Rossendorf, Inst. of Radiation Physics, PF 5103119, 013314 Dresden (Germany); Schoene, S.; Sobiella, M. [Helmholtzzentrum Dresden-Rossendorf, Inst. of Radiation Physics, PF 5103119, 013314 Dresden (Germany); Zuber, K. [Technische Universitaet Dresden, Inst. of Nuclear and Particle Physics, Zellescher Weg 19, 013069 Dresden (Germany); Enghardt, W. [Technische Universitaet Dresden, OncoRay, PF 86, 013307 Dresden (Germany); Helmholtzzentrum Dresden-Rossendorf, Inst. of Radiation Physics, PF 5103119, 013314 Dresden (Germany)

2011-07-01T23:59:59.000Z

284

First prototype of a silicon tracker using an artificial retina for fast track finding  

E-Print Network [OSTI]

We report on the R\\&D for a first prototype of a silicon tracker based on an alternative approach for fast track finding. The working principle is inspired from neurobiology, in particular by the processing of visual images by the brain as it happens in nature. It is based on extensive parallelisation of data distribution and pattern recognition. In this work we present the design of a practical device that consists of a telescope based on single-sided silicon detectors; we describe the data acquisition system and the implementation of the track finding algorithms using available digital logic of commercial FPGA devices. Tracking performance and trigger capabilities of the device are discussed along with perspectives for future applications.

N. Neri; A. Abba; F. Caponio; M. Citterio; S. Coelli; J. Fu; A. Geraci; M. Monti; M. Petruzzo; F. Bedeschi; P. Marino; M. J. Morello; A. Piucci; G. Punzi; F. Spinella; S. Stracka; J. Walsh; L. Ristori; D. Tonelli

2014-09-11T23:59:59.000Z

285

Deep sea tests of a prototype of the KM3NeT digital optical module  

E-Print Network [OSTI]

The first prototype of a photo-detection unit of the future KM3NeT neutrino telescope has been deployed in the deep waters of the Mediterranean Sea. This digital optical module has a novel design with a very large photocathode area segmented by the use of 31 three inch photomultiplier tubes. It has been integrated in the ANTARES detector for in-situ testing and validation. This paper reports on the first months of data taking and rate measurements. The analysis results highlight the capabilities of the new module design in terms of background suppression and signal recognition. The directionality of the optical module enables the recognition of multiple Cherenkov photons from the same $^{40}$K decay and the localization bioluminescent activity in the neighbourhood. The single unit can cleanly identify atmospheric muons and provide sensitivity to the muon arrival directions.

Adrián-Martínez, S; Aharonian, F; Aiello, S; Albert, A; Ameli, F; Anassontzis, E G; Anghinolfi, M; Anton, G; Anvar, S; Ardid, M; de Asmundis, R; Band, H; Barbarino, G; Barbarito, E; Barbato, F; Baret, B; Baron, S; Belias, A; Berbee, E; Berg, A M van den; Berkien, A; Bertin, V; Beurthey, S; van Beveren, V; Beverini, N; Biagi, S; Bianucci, S; Billault, M; Birbas, A; Rookhuizen, H Boer; Bormuth, R; Bouche, V; Bouhadef, B; Bourlis, G; Bouwhuis, M; Bozza, C; Bruijn, R; Brunner, J; Cacopardo, G; Caillat, L; Calamai, M; Calvo, D; Capone, A; Caramete, L; Caruso, F; Cecchini, S; Ceres, A; Cereseto, R; Champion, C; Chateau, F; Chiarusi, T; Christopoulou, B; Circella, M; Classen, L; Cocimano, R; Colonges, S; Coniglione, R; Cosquer, A; Costa, M; Coyle, P; Creusot, A; Curtil, C; Cuttone, G; D'Amato, C; D'Amico, A; De Bonis, G; De Rosa, G; Deniskina, N; Destelle, J -J; Distefano, C; Donzaud, C; Dornic, D; Dorosti-Hasankiadeh, Q; Drakopoulou7, E; Drouhin, D; Drury, L; Durand, D; Eberl, T; Eleftheriadis, C; Elsaesser, D; Enzenhofer, A; Fermani, P; Fusco, L A; Gajana, D; Gal, T; Galata, S; Gallo, F; Garufi, F; Gebyehu, M; Giordano, V; Gizani, N; Ruiz, R Gracia; Graf, K; Grasso, R; Grella, G; Grmek, A; Habel, R; van Haren, H; Heid, T; Heijboer, A; Heine, E; Henry, S; Hernandez-Rey, J J; Herold, B; Hevinga, M A; van der Hoek, M; Hofestadt, J; Hogenbirk, J; Hugon, C; Hosl, J; Imbesi, M; James, C; Jansweijer, P; Jochum, J; de Jong, M; Kadler, M; Kalekin, O; Kappes, A; Kappos, E; Katz, U; Kavatsyuk, O; Keller, P; Kieft, G; Koffeman, E; Kok, H; Kooijman, P; Koopstra, J; Korporaal, A; Kouchner, A; Koutsoukos, S; Kreykenbohm, I; Kulikovskiy, V; Lahmann, R; Lamare, P; Larosa, G; Lattuada, D; Provost, H Le; Leisos, A; Lenis, D; Leonora, E; Clark, M Lindsey; Liolios, A; Alvarez, C D Llorens; Lohner, H; Presti, D Lo; Louis, F; Maccioni, E; Mannheim, K; Manolopoulos, K; Margiotta, A; Maris, O; Markou, C; Martinez-Mora, J A; Martini, A; Masullo, R; Michael, T; Migliozzi, P; Migneco, E; Miraglia, A; Mollo, C; Mongelli, M; Morganti, M; Mos, S; Moudden, Y; Musico, P; Musumeci, M; Nicolaou, C; Nicolau, C A; Orlando, A; Orzelli, A; Papageorgiou, K; Papaikonomou, A; Papaleo, R; Pavalas, G E; Peek, H; Pellegrino, C; Pellegriti, M G; Perrina, C; Petridou, C; Piattelli, P; Popa, V; Pradier, Th; Priede, M; Puhlhofer, G; Pulvirenti, S; Racca, C; Raffaelli, F; Randazzo, N; Rapidis, P A; Razis, P; Real, D; Resvanis, L; Reubelt, J; Riccobene, G; Rovelli, A; Royon, J; Saldana, M; Samtleben, D F E; Sanguineti, M; Santangelo, A; Sapienza, P; Savvidis, I; Schmelling, J; Schnabel, J; Sedita, M; Seitz, T; Sgura, I; Simeone, F; Siotis, I; Sipala, V; Solazzo, M; Spitaleri, A; Spurio, M; Steijger, J; Stolarczyk, T; Stransky, D; Taiuti, M; Terreni, G; Tezier, D; Theraube, S; Thompson, L F; Timmer, P; Trapierakis, H I; Trasatti, L; Trovato, A; Tselengidou, M; Tsirigotis, A; Tzamarias, S; Tzamariudaki, E; Vallage, B; Van Elewyck, V; Vermeulen, J; Vernin, P; Viola, S; Vivolo, D; Werneke, P; Wiggers, L; Wilms, J; de Wolf, E; van Wooning, R H L; Yatkin, K; Zachariadou, K; Zonca, E; Zornoza, J D; Zúñiga, J; Zwart, A

2014-01-01T23:59:59.000Z

286

Test and characterization of a prototype silicon-tungsten electromagnetic calorimeter  

E-Print Network [OSTI]

New generation high-energy physics experiments demand high precision tracking and accurate measurements of a large number of particles produced in the collisions of lementary particles and heavy-ions. Silicon-tungsten (Si-W) calorimeters provide the most viable technological option to meet the requirements of particle detection in high multiplicity environments. We report a novel Si-W calorimeter design, which is optimized for $\\gamma/\\pi^0$ discrimination up to high momenta. In order to test the feasibility of the calorimeter, a prototype mini-tower was constructed using silicon pad detector arrays and tungsten layers. The performance of the mini-tower was tested using pion and electron beams at the CERN Proton Synchrotron (PS). The experimental results are compared with the results from a detailed GEANT-4 simulation. A linear relationship between the observed energy deposition and simulated response of the mini-tower has been obtained, in line with our expectations.

Sanjib Muhuri; Sourav Mukhopadhyay; Vinay B. Chandratre; Menka Sukhwani; Satyajit Jena; Shuaib Ahmad Khan; Tapan K. Nayak; Jogender Saini; Rama Narayana Singaraju

2014-07-22T23:59:59.000Z

287

High efficiency radioisotope thermophotovoltaic prototype generator  

SciTech Connect (OSTI)

A radioisotope thermophotovoltaic generator space power system (RTPV) is lightweight, low-cost alternative to the present radioisotope thermoelectric generator system (RTG). The fabrication of such an RTPV generator has recently become feasible as the result of the invention of the GaSb infrared sensitive photovoltaic cell. Herein, the authors present the results of a parametric study of emitters and optical filters in conjuction with existing data on gallium antimonide cells. They compare a polished tungsten emitter with an Erbia selective emitter for use in combination with a simple dielectric filter and a gallium antimonide cell array. They find that the polished tungsten emitter is by itself a very selective emitter with low emissivity beyond 4 microns. Given a gallium antimonide cell and a tungsten emitter, a simple dielectric filter can be designed to transmit radiant energy below 1.7 microns and to reflect radiant energy between 1.7 and 4 microns back to the emitter. Because of the low long wavelength emissivity associated with the polished tungsten emitter, this simple dielectric filter then yields very respectable system performance. Also as a result of the longer wavelength fall-off in the tungsten emissivity curve, the radiation energy peak for a polished tungsten emitter operating at 1300 K shifts to shorter wavelengths relative to the blackbody spectrum so that the radiated energy peak falls right at the gallium antimonide cell bandedge. The result is that the response of the gallium antimonide cell is well matched to a polished tungsten emitter. The authors propose, therefore, to fabricate an operating prototype of a near term radioisotope thermophotovoltaic generator design consisting of a polished tungsten emitter, standard gallium antimonide cells, and a near-term dielectric filter.

Avery, J.E.; Samaras, J.E.; Fraas, L.M.; Ewell, R. [JX Crystals, Inc., Issaquah, WA (United States)

1995-10-01T23:59:59.000Z

288

Mechanically Cooled Large-Volume Germanium Detector Systems for Nuclear Explosion Monitoring  

SciTech Connect (OSTI)

Compact maintenance free mechanical cooling systems are being developed to operate large volume (~570 cm3, ~3 kg, 140% or larger) germanium detectors for field applications. We are using a new generation of Stirling-cycle mechanical coolers for operating the very largest volume germanium detectors with absolutely no maintenance or liquid nitrogen requirements. The user will be able to leave these systems unplugged on the shelf until needed. The flip of a switch will bring a system to life in ~1 hour for measurements. The maintenance-free operating lifetime of these detector systems will exceed five years. These features are necessary for remote long-duration liquid-nitrogen free deployment of large-volume germanium gamma-ray detector systems for Nuclear Explosion Monitoring (NEM). The Radionuclide Aerosol Sampler/Analyzer (RASA) will greatly benefit from the availability of such detectors by eliminating the need for liquid nitrogen at RASA sites while still allowing the very largest available germanium detectors to be utilized. These mechanically cooled germanium detector systems being developed here will provide the largest, most sensitive detectors possible for use with the RASA. To provide such systems, the appropriate technical fundamentals are being researched. Mechanical cooling of germanium detectors has historically been a difficult endeavor. The success or failure of mechanically cooled germanium detectors stems from three main technical issues: temperature, vacuum, and vibration. These factors affect one another. There is a particularly crucial relationship between vacuum and temperature. These factors will be experimentally studied both separately and together to insure a solid understanding of the physical limitations each factor places on a practical mechanically cooled germanium detector system for field use. Using this knowledge, a series of mechanically cooled germanium detector prototype systems are being designed and fabricated. Our collaborators at Pacific Northwest National Laboratory (PNNL) will evaluate these detector systems on the bench top and eventually in RASA systems to insure reliable and practical operation.

Hull, Ethan L.; Pehl, Richard H.; Lathrop, James R.; Martin, Gregory N.; Mashburn, R. B.; Miley, Harry S.; Aalseth, Craig E.; Hossbach, Todd W.; Bowyer, Ted W.

2006-09-21T23:59:59.000Z

289

Progress in the development of large area sub-millimeter resolution CdZnTe strip detectors  

SciTech Connect (OSTI)

The authors report progress in ongoing measurements of the performance of a sub-millimeter pitch CdZnTe strip detector developed as a prototype for astronomical instruments. Strip detectors can be used to provide two-dimensional position resolution with fewer electronic channels than pixellated arrays. Arrays of this type are under development for the position-sensitive image plane detector for a coded-aperture telescope operating in the hard x-ray range of 20--200 keV. The prototype is a 1.5 mm thick, 64 x 64 orthogonal stripe CdZnTe detector of 0.375 mm pitch in both dimensions, approximately one square inch of sensitive area. In addition to energy and spatial resolution capabilities, as reported last year, the authors demonstrate the imaging capabilities and discuss uniformity of response across an 8 x 8 stripe, 64 pixel, segment of detector. A technique for determination of the depth of photon interaction is discussed and initial results related to depth determination are presented. Issues related to the design and development of readout electronics, the packaging and production of strip detectors and the production of compact strip detector modules, including detector and readout electronics, are also discussed.

Macri, J.R.; Boykin, D.V.; Larson, K. [Univ. of New Hampshire, Durham, NH (United States). Space Science Center] [and others

1996-12-31T23:59:59.000Z

290

An analysis of early stage prototypes using implementation, look and feel, and role  

E-Print Network [OSTI]

Identifying the purpose of a prototype is central to making informed decisions about the kind of prototype to build. Houde and Hill (1997) propose a model for classifying prototypes according to their purpose and the design ...

Hernley, Lauren R. (Lauren Renee)

2011-01-01T23:59:59.000Z

291

THE PROTOTYPE ALUMINUM - CARBON SINGLE, DOUBLE, AND TRIPLE BONDS: Al - CH3, Al = CH2, AND Al. = CH  

E-Print Network [OSTI]

three prototype Table II. aluminum-carbon bonds and theirPhysics THE PROTOTYPE ALUMINUM - CARBON SINGLE, DOUBLE, ANDLBL-l0871 The Prototype Aluminum - Carbon Single, Double.

Fox, Douglas J.

2011-01-01T23:59:59.000Z

292

Performance of the AMS-02 Transition Radiation Detector  

E-Print Network [OSTI]

For cosmic particle spectroscopy on the International Space Station the AMS experiment will be equipped with a Transition Radiation Detector (TRD) to improve particle identification. The TRD has 20 layers of fleece radiator with Xe/CO2 proportional mode straw tube chambers. They are supported in a conically shaped octagon structure made of CFC-Al-honeycomb. For low power consumption VA analog multiplexers are used as front-end readout. A 20 layer prototype built from final design components has achieved proton rejections from 100 to 2000 at 90% electron efficiency for proton beam energies up to 250 GeV with cluster counting, likelihood and neural net selection algorithms.

P. v. Doetinchem; S. Fopp; W. Karpinski; T. Kirn; K. Luebelsmeyer; J. Orboeck; S. Schael; A. Schultz von Dratzig; G. Schwering; T. Siedenburg; R. Siedling; W. Wallraff; U. Becker; J. Burger; R. Henning; A. Kounine; V. Koutsenko; J. Wyatt

2006-08-29T23:59:59.000Z

293

Handheld CZT radiation detector  

DOE Patents [OSTI]

A handheld CZT radiation detector having a CZT gamma-ray sensor, a multichannel analyzer, a fuzzy-logic component, and a display component is disclosed. The CZT gamma-ray sensor may be a coplanar grid CZT gamma-ray sensor, which provides high-quality gamma-ray analysis at a wide range of operating temperatures. The multichannel analyzer categorizes pulses produce by the CZT gamma-ray sensor into channels (discrete energy levels), resulting in pulse height data. The fuzzy-logic component analyzes the pulse height data and produces a ranked listing of radioisotopes. The fuzzy-logic component is flexible and well-suited to in-field analysis of radioisotopes. The display component may be a personal data assistant, which provides a user-friendly method of interacting with the detector. In addition, the radiation detector may be equipped with a neutron sensor to provide an enhanced mechanism of sensing radioactive materials.

Murray, William S.; Butterfield, Kenneth B.; Baird, William

2004-08-24T23:59:59.000Z

294

Semiconductor radiation detector  

DOE Patents [OSTI]

A semiconductor radiation detector is provided to detect x-ray and light photons. The entrance electrode is segmented by using variable doping concentrations. Further, the entrance electrode is physically segmented by inserting n+ regions between p+ regions. The p+ regions and the n+ regions are individually biased. The detector elements can be used in an array, and the p+ regions and the n+ regions can be biased by applying potential at a single point. The back side of the semiconductor radiation detector has an n+ anode for collecting created charges and a number of p+ cathodes. Biased n+ inserts can be placed between the p+ cathodes, and an internal resistor divider can be used to bias the n+ inserts as well as the p+ cathodes. A polysilicon spiral guard can be implemented surrounding the active area of the entrance electrode or surrounding an array of entrance electrodes.

Patt, Bradley E. (Sherman Oaks, CA); Iwanczyk, Jan S. (Los Angeles, CA); Tull, Carolyn R. (Orinda, CA); Vilkelis, Gintas (Westlake Village, CA)

2002-01-01T23:59:59.000Z

295

Semiconductor neutron detector  

DOE Patents [OSTI]

A neutron detector has a compound of lithium in a single crystal form as a neutron sensor element. The lithium compound, containing improved charge transport properties, is either lithium niobate or lithium tantalate. The sensor element is in direct contact with a monitor that detects an electric current. A signal proportional to the electric current is produced and is calibrated to indicate the neutrons sensed. The neutron detector is particularly useful for detecting neutrons in a radiation environment. Such radiation environment may, e.g. include gamma radiation and noise.

Ianakiev, Kiril D. (Los Alamos, NM); Littlewood, Peter B. (Cambridge, GB); Blagoev, Krastan B. (Arlington, VA); Swinhoe, Martyn T. (Los Alamos, NM); Smith, James L. (Los Alamos, NM); Sullivan, Clair J. (Los Alamos, NM); Alexandrov, Boian S. (Los Alamos, NM); Lashley, Jason Charles (Santa Fe, NM)

2011-03-08T23:59:59.000Z

296

Ultrasonic liquid level detector  

DOE Patents [OSTI]

An ultrasonic liquid level detector for use within a shielded container, the detector being tubular in shape with a chamber at its lower end into which liquid from in the container may enter and exit, the chamber having an ultrasonic transmitter and receiver in its top wall and a reflector plate or target as its bottom wall whereby when liquid fills the chamber a complete medium is then present through which an ultrasonic wave may be transmitted and reflected from the target thus signaling that the liquid is at chamber level.

Kotz, Dennis M. (North Augusta, SC); Hinz, William R. (Augusta, GA)

2010-09-28T23:59:59.000Z

297

Fissile material detector  

DOE Patents [OSTI]

A detector for fissile materials which provides for integrity monitoring of fissile materials and can be used for nondestructive assay to confirm the presence of a stable content of fissile material in items. The detector has a sample cavity large enough to enable assay of large items of arbitrary configuration, utilizes neutron sources fabricated in spatially extended shapes mounted on the endcaps of the sample cavity, incorporates a thermal neutron filter insert with reflector properties, and the electronics module includes a neutron multiplicity coincidence counter.

Ivanov, Alexander I. (Dubna, RU); Lushchikov, Vladislav I. (Dubna, RU); Shabalin, Eugeny P. (Dubna, RU); Maznyy, Nikita G. (Dubna, RU); Khvastunov, Michael M. (Dubna, RU); Rowland, Mark (Alamo, CA)

2002-01-01T23:59:59.000Z

298

Glow discharge detector  

DOE Patents [OSTI]

A highly sensitive electronic ion cell for the measurement of trace elements in He carrier gas which involves glow discharge. A constant wave (CW) glow discharge detector which is controlled through a biased resistor, can detect the change of electron density caused by impurities in the He carrier gas by many orders of magnitude larger than that caused by direct ionization or electron capture. The glow discharge detector utilizes a floating pseudo-electrode to form a probe in or near the plasma. By using this probe, the large variation of electron density due to trace amounts of impurities can be directly measured.

Koo, Jackson C. (San Ramon, CA); Yu, Conrad M. (Antioch, CA)

2002-01-01T23:59:59.000Z

299

2238 IEEE TRANSACTIONS ON NUCLEAR SCIENCE, VOL. 51, NO. 5, OCTOBER 2004 Large Area Imaging Detector for Long-Range,  

E-Print Network [OSTI]

imager to detect nuclear materials at distances of 100 m. Index Terms--Coded aperture imager, gamma-ray problems, the advantages of imaging and the construction of a prototype, large-area (0.57 m2) gamma-ray detectors, gamma-ray imagers, radiation source search. I. INTRODUCTION NUCLEAR material cannot be detected

Horn, Berthold K.P.

300

MOWII Webinar: OCGen Prototype Testing: Evaluating Buoyancy Pod...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Tidal Energy Development MOWII Webinar: OCGen Prototype Testing: Evaluating Buoyancy PodTension Leg Platforms for Tidal Energy Development November 13, 2014 10:00AM to 10:45AM...

Note: This page contains sample records for the topic "argon prototype detector" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

Design & implementation of a wireless sensor prototyping kit  

E-Print Network [OSTI]

In recent years, wireless sensor networks (WSN) has become an active area of research among computer scientists. In this work, JONA, a prototyping kit for wireless sensors, will be described. The intention of this kit is ...

Hope, Jamison Roger

2005-01-01T23:59:59.000Z

302

Prototype Spallation Neutron Source Rotating Target Assembly Final Test Report  

SciTech Connect (OSTI)

A full-scale prototype of an extended vertical shaft, rotating target assembly based on a conceptual target design for a 1 to 3-MW spallation facility was built and tested. Key elements of the drive/coupling assembly implemented in the prototype include high integrity dynamic face seals, commercially available bearings, realistic manufacturing tolerances, effective monitoring and controls, and fail-safe shutdown features. A representative target disk suspended on a 3.5 meter prototypical shaft was coupled with the drive to complete the mechanical tests. Successful operation for 5400 hours confirmed the overall mechanical feasibility of the extended vertical shaft rotating target concept. The prototype system showed no indications of performance deterioration and the equipment did not require maintenance or relubrication.

McManamy, Thomas J [ORNL; Graves, Van [Oak Ridge National Laboratory (ORNL); Garmendia, Amaia Zarraoa [IDOM Bilbao; Sorda, Fernando [ESS Bilbao; Etxeita, Borja [IDOM Bilbao; Rennich, Mark J [ORNL

2011-01-01T23:59:59.000Z

303

Design and prototyping methods for brushless motors and motor control  

E-Print Network [OSTI]

In this report, simple, low-cost design and prototyping methods for custom brushless permanent magnet synchronous motors are explored. Three case-study motors are used to develop, illustrate and validate the methods. Two ...

Colton, Shane W. (Shane William)

2010-01-01T23:59:59.000Z

304

Multianode Photo Multiplier Tubes as Photo Detectors for Ring Imaging Cherenkov Detectors  

E-Print Network [OSTI]

The 64-channel Multianode Photo Multiplier (MaPMT) has been evaluated as a candidate for the LHCb Ring Imaging Cherenkov (RICH) photo detectors. We present result from data taken with a 3x3 array of closely packed MaPMTs mounted onto the RICH 1 prototype vessel, exposed to charged particle beams at CERN, and read out at LHC speed. Using a LED light source, we have performed spatial light scans to study the light collection efficiency of the MaPMTs We have also measured the performance of the MaPMTs as a function of the applied high voltage. Different dynode resistor chains have been used to study the tubes at low gains. In addition, we have studied the behaviour of the MaPMT in magnetic fields.

Muheim, F

2003-01-01T23:59:59.000Z

305

Design and implementation of a prototype generator monitoring system  

E-Print Network [OSTI]

DESIGN AND IMPLEMENTATION OF A PROTOTYPE GENERATOR MONITORING SYSTEM A Thesis JIANYONG SUN Submitted to the Office of Graduate Studies of Texas ASM University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE May... 1996 Major Subject: Electrical Engineering DESIGN AND IMPLEMENTATION OF A PROTOTYPE GENERATOR MONITORING SYSTEM A Thesis by JIANYONG SUN Submitted to Texas ASM University in partial fulfillment of the requirements for the degree of MASTER...

Sun, Jianyong

1996-01-01T23:59:59.000Z

306

Status report on ESF-related prototype testing  

SciTech Connect (OSTI)

This report provides information on the Prototype Testing performed in the G-Tunnel on the Nevada Test Site by the Yucca Mountain Project form April 1988 to November 1989. The Testing Program was implemented to ensure that the Exploratory Shaft Facility (ESF) tests can be completed in the time available and to develop instruments, equipment, and procedures so the ESF tests can collect reliable and representative site characterization data. This report summarizes the ESF prototype tests and presents preliminary results.

Oliver, R.D.; Kalia, H.N. [comps.

1992-12-01T23:59:59.000Z

307

Development and Analysis of Desiccant Enhanced Evaporative Air Conditioner Prototype  

SciTech Connect (OSTI)

This report documents the design of a desiccant enhanced evaporative air conditioner (DEVAP AC) prototype and the testing to prove its performance. Previous numerical modeling and building energy simulations indicate a DEVAP AC can save significant energy compared to a conventional vapor compression AC (Kozubal et al. 2011). The purposes of this research were to build DEVAP prototypes, test them to validate the numerical model, and identify potential commercialization barriers.

Kozubal, E.; Woods, J.; Judkoff, R.

2012-04-01T23:59:59.000Z

308

Fast Detector Simulation Using Lelaps, Detector Descriptions in GODL  

SciTech Connect (OSTI)

Lelaps is a fast detector simulation program which reads StdHep generator files and produces SIO or LCIO output files. It swims particles through detectors taking into account magnetic fields, multiple scattering and dE/dx energy loss. It simulates parameterized showers in EM and hadronic calorimeters and supports gamma conversions and decays. In addition to three built-in detector configurations, detector descriptions can also be read from files in the new GODL file format.

Langeveld, Willy; /SLAC

2005-07-06T23:59:59.000Z

309

argon hadronic end-cap: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

hadronic end-cap calorimeter of ATLAS CERN Preprints Summary: At the ATLAS detector a SCADA system surveys and controls the sub- detectors. The link is realized by PVSS2...

310

Photovoltaic radiation detector element  

DOE Patents [OSTI]

A radiation detector element is formed of a body of semiconductor material, a coating on the body which forms a photovoltaic junction therewith, and a current collector consisting of narrow metallic strips, the aforesaid coating having an opening therein in the edge of which closely approaches but is spaced from the current collector strips.

Agouridis, D.C.

1980-12-17T23:59:59.000Z

311

The BABAR Detector  

E-Print Network [OSTI]

BABAR, the detector for the SLAC PEP-II asymmetric e+e- B Factory operating at the upsilon 4S resonance, was designed to allow comprehensive studies of CP-violation in B-meson decays. Charged particle tracks are measured in a multi-layer silicon vertex tracker surrounded by a cylindrical wire drift chamber. Electromagentic showers from electrons and photons are detected in an array of CsI crystals located just inside the solenoidal coil of a superconducting magnet. Muons and neutral hadrons are identified by arrays of resistive plate chambers inserted into gaps in the steel flux return of the magnet. Charged hadrons are identified by dE/dx measurements in the tracking detectors and in a ring-imaging Cherenkov detector surrounding the drift chamber. The trigger, data acquisition and data-monitoring systems, VME- and network-based, are controlled by custom-designed online software. Details of the layout and performance of the detector components and their associated electronics and software are presented.

The BABAR Collaboration

2001-05-16T23:59:59.000Z

312

The CLIC Vertex Detector  

E-Print Network [OSTI]

The precision physics needs at TeV-scale linear electron-positron colliders (ILC and CLIC) require a vertex-detector system with excellent flavour-tagging capabilities through a meas- urement of displaced vertices. This is essential, for example, for an explicit measurement of the Higgs decays to pairs of b-quarks, c-quarks and gluons. Efficient identification of top quarks in the decay t ? W b will give access to the ttH-coupling measurement. In addition to those requirements driven by physics arguments, the CLIC bunch structure calls for hit tim- ing at the few-ns level. As a result, the CLIC vertex-detector system needs to have excellent spatial resolution, full geometrical coverage extending to low polar angles, extremely low material budget, low occupancy facilitated by time-tagging, and sufficient heat removal from sensors and readout. These considerations challenge current technological limits. A detector concept based on hybrid pixel-detector technology is under development for the CLIC ver- tex det...

Dannheim, D.

2014-01-01T23:59:59.000Z

313

Sensitive hydrogen leak detector  

DOE Patents [OSTI]

A sensitive hydrogen leak detector system using passivation of a stainless steel vacuum chamber for low hydrogen outgassing, a high compression ratio vacuum system, a getter operating at 77.5 K and a residual gas analyzer as a quantitative hydrogen sensor.

Myneni, Ganapati Rao (Yorktown, VA)

1999-01-01T23:59:59.000Z

314

Directional gamma detector  

DOE Patents [OSTI]

An improved directional gamma radiation detector has a collector sandwiched etween two layers of insulation of varying thicknesses. The collector and insulation layers are contained within an evacuated casing, or emitter, which releases electrons upon exposure to gamma radiation. Delayed electrons and electrons entering the collector at oblique angles are attenuated as they pass through the insulation layers on route to the collector.

LeVert, Francis E. (Downers Grove, Knoxville, TN); Cox, Samson A. (Downers Grove, IL)

1981-01-01T23:59:59.000Z

315

The Solenoidal Detector Collaboration at the SSCL. Progress report, March 1, 1991--February 29, 1992  

SciTech Connect (OSTI)

Our primary interest is the detection and measurement of muons and the design of the muon detector and trigger for the SDC. We have been concentrating on the design of the forward muon system (in the approximate pseudo-rapidity region of 1.5 <{vert_bar} {eta} {vert_bar}<2.5 corresponding to azimuthal angles of 9.4{degrees} to 26. 0{degrees}) and at present are responsible for the engineering design of the detector support system in this rapidity region. We are also participating in the development of a liquid argon (LAr) calorimeter adapted to the bunch structure of the SSC machine. At present a LAr calorimeter still remains an option for the choice of calorimetry for the SDC. Recent measurements at BNL in a 20 GeV pion beam confirm that many of the problems associated with long signal collection times of LAr can be solved.

Not Available

1992-05-01T23:59:59.000Z

316

High-resolution ionization detector and array of such detectors  

DOE Patents [OSTI]

A high-resolution ionization detector and an array of such detectors are described which utilize a reference pattern of conductive or semiconductive material to form interaction, pervious and measurement regions in an ionization substrate of, for example, CdZnTe material. The ionization detector is a room temperature semiconductor radiation detector. Various geometries of such a detector and an array of such detectors produce room temperature operated gamma ray spectrometers with relatively high resolution. For example, a 1 cm.sup.3 detector is capable of measuring .sup.137 Cs 662 keV gamma rays with room temperature energy resolution approaching 2% at FWHM. Two major types of such detectors include a parallel strip semiconductor Frisch grid detector and the geometrically weighted trapezoid prism semiconductor Frisch grid detector. The geometrically weighted detector records room temperature (24.degree. C.) energy resolutions of 2.68% FWHM for .sup.137 Cs 662 keV gamma rays and 2.45% FWHM for .sup.60 Co 1.332 MeV gamma rays. The detectors perform well without any electronic pulse rejection, correction or compensation techniques. The devices operate at room temperature with simple commercially available NIM bin electronics and do not require special preamplifiers or cooling stages for good spectroscopic results.

McGregor, Douglas S. (Ypsilanti, MI); Rojeski, Ronald A. (Pleasanton, CA)

2001-01-16T23:59:59.000Z

317

Feasibility Study of Gas Electron Multiplier Detector as an X-Ray Image Sensor  

E-Print Network [OSTI]

For its ease manufacturing, flexible geometry, and cheap manufacturing cost, the gas electron multiplier (GEM) detector can be used as an x-ray image sensor. For this purpose, we acquired relative detection efficiencies and suggested a method to increase the detection efficiency in order to study the possibility of GEM detector as an x-ray image sensor. The GEM detector system is composed of GEM foils, the instrument system, the gas system, and the negative power supply. The instrument system consists of the A225 charge sensitive preamp, A206 discriminator, and MCA8000D multichannel analyzer. For the gas system, Argon gas was mixed with CO2 to the ratio of 8:2, and for the negative 2,000 volts, the 3106D power supply was used. The CsI-coated GEM foil was used to increase the detection efficiency. Fe-55 was used as an x-ray source and the relative efficiency was acquired by using the ratio of GEM detector to the CdTe detector. The total count method and the energy spectrum method were used to calculate the rel...

Shin, Sukyoung; Lee, Soonhyouk

2015-01-01T23:59:59.000Z

318

Near infrared detectors for SNAP  

E-Print Network [OSTI]

Near Infrared Detectors for SNAP M. Schubnell a , N. Barron1k × 1k and 2k × 2k) near infrared detectors manufactured byas part of the near infrared R&D e?ort for SNAP (the Super-

2006-01-01T23:59:59.000Z

319

A Segmented, Enriched N-type Germanium Detector for Neutrinoless Double Beta-Decay Experiments  

SciTech Connect (OSTI)

We present data characterizing the performance of the _rst segmented, N- type Ge detector, isotopically enriched to 85% 76Ge. This detector, based on the Ortec PT6x2 design and referred to as SEGA (Segmented, Enriched Germanium Assembly), was developed as a possible prototype for neutrinoless double beta-decay measurements by the Majorana collaboration. We present some of the general characteristics (including bias potential, efficiency, leakage current, and integral cross-talk) for this detector in its temporary cryostat. We also present an analysis of the resolution of the detector, and demonstrate that for all but two segments there is at least one channel that reaches the Majorana resolution goal below 4 keV FWHM at 2039 keV, and all channels are below 4.5 keV FWHM.

Leviner, L.; Aalseth, Craig E.; Ahmed, M. W.; Avignone, F. T.; Back, Henning O.; Barabash, Alexander S.; Boswell, M.; De Braeckeleer, L.; Brudanin, V.; Chan, Yuen-Dat; Egorov, Viatcheslav; Elliott, Steven R.; Gehman, Victor M.; Hossbach, Todd W.; Kephart, Jeremy; Kidd, M. F.; Konovalov, S.; Lesko, Kevin; Li, Jingyi; Mei, Dongming; Mikhailov, S.; Miley, Harry S.; Radford, D. C.; Reeves, James H.; Sandukovsky, Viatcheslav; Umatov, Valdimir; Underwood, T. A.; Tornow, W.; Wu, Y. K.; Young, A.

2014-01-21T23:59:59.000Z

320

A measurement of the absorption of liquid argon scintillation light by dissolved nitrogen at the part-per-million level  

E-Print Network [OSTI]

We report on a measurement of the absorption length of scintillation light in liquid argon due to dissolved nitrogen at the part-per-million (ppm) level. We inject controlled quantities of nitrogen into a high purity volume ...

Jones, Benjamin James Poyner

Note: This page contains sample records for the topic "argon prototype detector" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

Observation of ? mode electron heating in dusty argon radio frequency discharges  

SciTech Connect (OSTI)

The time-resolved emission of argon atoms in a dusty plasma has been measured with phase-resolved optical emission spectroscopy using an intensified charge-coupled device camera. For that purpose, three-dimensional dust clouds have been confined in a capacitively coupled rf argon discharge with the help of thermophoretic levitation. While electrons are exclusively heated by the expanding sheath (? mode) in the dust-free case, electron heating takes place in the entire plasma bulk when the discharge volume is filled with dust particles. Such a behavior is known as ? mode, first observed in electronegative plasmas. Furthermore, particle-in-cell simulations have been carried out, which reproduce the trends of the experimental findings. These simulations support previous numerical models showing that the enhanced atomic emission in the plasma can be attributed to a bulk electric field, which is mainly caused by the reduced electrical conductivity due to electron depletion.

Killer, Carsten; Bandelow, Gunnar; Schneider, Ralf; Melzer, André [Institut für Physik, Ernst-Moritz-Arndt-Universität Greifswald, 17489 Greifswald (Germany)] [Institut für Physik, Ernst-Moritz-Arndt-Universität Greifswald, 17489 Greifswald (Germany); Matyash, Konstantin [Universitätsrechenzentrum, Ernst-Moritz-Arndt-Universität Greifswald, 17489 Greifswald (Germany)] [Universitätsrechenzentrum, Ernst-Moritz-Arndt-Universität Greifswald, 17489 Greifswald (Germany)

2013-08-15T23:59:59.000Z

322

Energy of the Quasi-free Electron in Argon and Krypton C. M. Evans1,  

E-Print Network [OSTI]

Energy of the Quasi-free Electron in Argon and Krypton C. M. Evans1, and G. L. Findley2, 1 these data, a new local Wigner- Seitz model for the density dependent energy V0(P) of a quasi-free electron/medium polarization energy, and includes the thermal kinetic energy of the quasi-free electron. Using this model, V0(P

Findley, Gary L.

323

Increased Efficiency in SI Engine with Air Replaced by Oxygen in Argon Mixture  

SciTech Connect (OSTI)

Basic engine thermodynamics predicts that spark ignited engine efficiency is a function of both the compression ratio of the engine and the specific heat ratio of the working fluid. In practice the compression ratio of the engine is often limited due to knock. Both higher specific heat ratio and higher compression ratio lead to higher end gas temperatures and increase the likelihood of knock. In actual engine cycles, heat transfer losses increase at higher compression ratios and limit efficiency even when the knock limit is not reached. In this paper we investigate the role of both the compression ratio and the specific heat ratio on engine efficiency by conducting experiments comparing operation of a single-cylinder variable-compression-ratio engine with both hydrogen-air and hydrogen-oxygen-argon mixtures. For low load operation it is found that the hydrogen-oxygen-argon mixtures result in higher indicated thermal efficiencies. Peak efficiency for the hydrogen-oxygen-argon mixtures is found at compression ratio 5.5 whereas for the hydrogen-air mixture with an equivalence ratio of 0.24 the peak efficiency is found at compression ratio 13. We apply a three-zone model to help explain the effects of specific heat ratio and compression ratio on efficiency. Operation with hydrogen-oxygen-argon mixtures at low loads is more efficient because the lower compression ratio results in a substantially larger portion of the gas to reside in the adiabatic core rather than in the boundary layer and in the crevices, leading to less heat transfer and more complete combustion.

Killingsworth, N J; Rapp, V H; Flowers, D L; Aceves, S M; Chen, J; Dibble, R

2010-01-13T23:59:59.000Z

324

A measurement of E/{pi} for a fast lead liquid argon calorimeter  

SciTech Connect (OSTI)

The NA34 (HELIOS) calorimeter has measured e/{pi} {congruent} 1.1 in a uranium/liquid argon calorimeter with a shaping time of 135 nsec. Lead may be a viable alternative, but e/{pi} must first be measured at fast shaping times in lead. We re preparing to measure e/{pi} at momenta ranging from 0.5 to 20 GeV/c and with shaping times of 50, 100 and 150 nsec.

Makowiecki, D.; Gordon, H.A.; Ma, H.; Murtagh, M.; Radeka, V.; Rahm, D.; Rescia, S. [Brookhaven National Lab., Upton, NY (United States); Abrams, G.S.; Groom, D.E.; Kirsten, F.; Levi, M.; Siegrist, J. [Lawrence Berkeley Lab., CA (United States); Amako, K.; Inaba, O.; Kondo, T. [National Lab. for High Energy Physics, Tsukuba, Ibaraki (Japan); Baden, A.R.; Fong, D.; Hadley, N.; Kunori, S.; Skuja, A. [Maryland Univ., College Park, MD (United States); Bowen, T.; Forden, G.; Jenkins, E.; Johns, K.; Rutherfoord, J.; Shupe, M. [Arizona Univ., Tucson, AZ (United States); Burnett, T.; Cook, V.; Davisson, R.; Mockett, P.; Rothberg, J.; Williams, R.W. [Washington Univ., Seattle, WA (United States); Cremaldi, L.; Reidy, J.; Summers, D. [Mississippi Univ., University, MS (United States); DiGiacomo, N. [Martin Marietta Aerospace, Denver, CO (United States). Astronautics Group; Draper, P.; Ferbel, T.; Lobkowicz, F. [Rochester Univ., NY (United States); Faust, J.; Hauptman, J.; Pang, M. [Iowa State Univ. of Science and Technology, Ames, IA (United States); Gabriel, T.A. [Oak Ridge National Lab., TN (United States); Hagopian, V.; Womersley, J. [Florida State Univ., Tallahassee, FL (United States); Handler, T. [Tennessee Univ., Knoxville, TN (United States); Hitlin, D. [California Inst. of Tech., Pasadena, CA (United States); Mulholland, G.T. [Fermi National Accelerator Lab., Batavia, IL (United States); Watanabe, Y. [Tokyo Inst. of Tech. (Japan); Weerts, H. [Michigan State Univ., East Lansing, MI (United States)

1990-12-31T23:59:59.000Z

325

A measurement of E/. pi. for a fast lead liquid argon calorimeter  

SciTech Connect (OSTI)

The NA34 (HELIOS) calorimeter has measured e/{pi} {congruent} 1.1 in a uranium/liquid argon calorimeter with a shaping time of 135 nsec. Lead may be a viable alternative, but e/{pi} must first be measured at fast shaping times in lead. We re preparing to measure e/{pi} at momenta ranging from 0.5 to 20 GeV/c and with shaping times of 50, 100 and 150 nsec.

Makowiecki, D.; Gordon, H.A.; Ma, H.; Murtagh, M.; Radeka, V.; Rahm, D.; Rescia, S. (Brookhaven National Lab., Upton, NY (United States)); Abrams, G.S.; Groom, D.E.; Kirsten, F.; Levi, M.; Siegrist, J. (Lawrence Berkeley Lab., CA (United States)); Amako, K.; Inaba, O.; Kondo, T. (National Lab. for High Energy Physics, Tsukuba, Ibaraki (Japan)); Baden, A.R.; Fong, D.; Hadley, N.; Kunori, S.; Skuja, A. (Maryland U

1990-01-01T23:59:59.000Z

326

Contamination d'un plasma d'argon par des vapeurs anodiques de cuivre P. Andanson et B. Cheminat  

E-Print Network [OSTI]

symboles Nous présentons une étude expérimentale sur la contamination d'un plasma d'arc par des vapeurs775 Contamination d'un plasma d'argon par des vapeurs anodiques de cuivre P. Andanson et B proche de l'anode en cuivre (1 mm à 1 cm) d'un arc stabilisé sous atmosphère d'argon (15 A et 30 A) est

Boyer, Edmond

327

Final Scientific/Technical Report Development of Large-Area Photo-Detectors  

SciTech Connect (OSTI)

This proposal requested ADR funds for two years to make measurements and detector proto-types in the context of planning a program in conjunction with Argonne National Laboratory to develop very large-area planar photodetectors. The proposed detectors have integrated transmission-line readout and sampling electronics able to achieve timing and position resolutions in the range of 1-50 psec and 1-10 mm, respectively. The capability for very precise time measurements is inherent in the design, and provides a ?third? coordinate, orthogonal to the two in the plane, for the point of origin of photons or charged particles, allowing ?tomographic? reconstruction in 3-dimensions inside a volume.

Frisch, Henry J. [The University of Chicago

2013-07-15T23:59:59.000Z

328

Scintillator detectors with long WLS fibers and multi-pixel photodiodes  

E-Print Network [OSTI]

We have studied the possibility of using Geiger mode multi-pixel photodiodes to read out long scintillator bars with a single wavelength-shifting fiber embedded along the bar. This detector configuration can be used in large volume detectors in future long baseline neutrino oscillation experiments. Prototype bars of 0.7 cm thickness and different widths have been produced and tested using two types of multi-pixel photodiodes: MRS APD (CPTA, Moscow) and MPPC (Hamamatsu). A minimum light yield of 7.2 p.e./MeV was obtained for a 4 cm wide bar.

O. Mineev; Yu. Kudenko; Yu. Musienko; I. Polyansky; N. Yershov

2011-10-12T23:59:59.000Z

329

Laser-processed three dimensional graphitic electrodes for diamond radiation detectors  

SciTech Connect (OSTI)

We have used an original approach for diamond detectors where three dimensional buried graphitic electrodes are processed in the bulk of a diamond substrate via laser-induced graphitization. Prototype made of polycrystalline chemical vapor deposition diamond was fabricated using a nanosecond UV laser. Its charge collection efficiency was evaluated using ?-particles emitted by a 241-Americium source. An improved charge collection efficiency was measured proving that laser micro-machining of diamond is a valid option for the future fabrication of three dimensional diamond detectors.

Caylar, Beno?-carett; Pomorski, Michal; Bergonzo, Philippe [CEA-LIST, Diamond Sensors Laboratory, Gif-sur-Yvette F-91191 (France)] [CEA-LIST, Diamond Sensors Laboratory, Gif-sur-Yvette F-91191 (France)

2013-07-22T23:59:59.000Z

330

Status of the ATLAS Liquid Argon Calorimeter and its performance after one year of LHC operation  

E-Print Network [OSTI]

The ATLAS experiment is designed to study the proton-proton collisions produced at the LHC with a centre-of-mass energy of 14 TeV. Liquid argon (LAr) sampling calorimeters are used in ATLAS for all electromagnetic calorimetry covering the pseudorapidity region ?<3.2, as well as for hadronic calorimetry from ?=1.4 to ?=4.8. The calorimeter system consists of an electromagnetic barrel calorimeter and two endcaps with electromagnetic (EMEC), hadronic (HEC) and forward (FCAL) calorimeters. The lead-liquid argon sampling technique with an accordion geometry was chosen for the barrel electromagnetic calorimeter (EMB) and adapted to the endcap (EMEC). This geometry allows a uniform acceptance over the whole azimuthal range without any gap. The hadronic endcap calorimeter (HEC) uses a copper-liquid argon sampling technique with plate geometry and is subdivided into two wheels in depth per end-cap. Finally, the forward calorimeter (FCAL) is composed of three modules featuring cylindrical electrodes with thin...

"Hoffman, J A; The ATLAS collaboration

2011-01-01T23:59:59.000Z

331

Design of the Prototypical Cryomodule for the EUROTRANS Superconducting Linac for Nuclear Waste Transmutation  

E-Print Network [OSTI]

Design of the Prototypical Cryomodule for the EUROTRANS Superconducting Linac for Nuclear Waste Transmutation

Barbanotti, S; Blache, P; Commeaux, C; Duthil, P; Panzeri, N; Pierini, P; Rampnoux, E; Souli, M

2008-01-01T23:59:59.000Z

332

Microwave hemorrhagic stroke detector  

DOE Patents [OSTI]

The microwave hemorrhagic stroke detector includes a low power pulsed microwave transmitter with a broad-band antenna for producing a directional beam of microwaves, an index of refraction matching cap placed over the patients head, and an array of broad-band microwave receivers with collection antennae. The system of microwave transmitter and receivers are scanned around, and can also be positioned up and down the axis of the patients head. The microwave hemorrhagic stroke detector is a completely non-invasive device designed to detect and localize blood pooling and clots or to measure blood flow within the head or body. The device is based on low power pulsed microwave technology combined with specialized antennas and tomographic methods. The system can be used for rapid, non-invasive detection of blood pooling such as occurs with hemorrhagic stroke in human or animal patients as well as for the detection of hemorrhage within a patient's body.

Haddad, Waleed S. (Dublin, CA); Trebes, James E. (Livermore, CA)

2002-01-01T23:59:59.000Z

333

Microwave hemorrhagic stroke detector  

DOE Patents [OSTI]

The microwave hemorrhagic stroke detector includes a low power pulsed microwave transmitter with a broad-band antenna for producing a directional beam of microwaves, an index of refraction matching cap placed over the patients head, and an array of broad-band microwave receivers with collection antennae. The system of microwave transmitter and receivers are scanned around, and can also be positioned up and down the axis of the patients head. The microwave hemorrhagic stroke detector is a completely non-invasive device designed to detect and localize blood pooling and clots or to measure blood flow within the head or body. The device is based on low power pulsed microwave technology combined with specialized antennas and tomographic methods. The system can be used for rapid, non-invasive detection of blood pooling such as occurs with hemorrhagic stoke in human or animal patients as well as for the detection of hemorrhage within a patient's body.

Haddad, Waleed S. (Dublin, CA); Trebes, James E. (Livermore, CA)

2007-06-05T23:59:59.000Z

334

Semiconductor radiation detector  

DOE Patents [OSTI]

A semiconductor detector for ionizing electromagnetic radiation, neutrons, and energetic charged particles. The detecting element is comprised of a compound having the composition I-III-VI.sub.2 or II-IV-V.sub.2 where the "I" component is from column 1A or 1B of the periodic table, the "II" component is from column 2B, the "III" component is from column 3A, the "IV" component is from column 4A, the "V" component is from column 5A, and the "VI" component is from column 6A. The detecting element detects ionizing radiation by generating a signal proportional to the energy deposited in the element, and detects neutrons by virtue of the ionizing radiation emitted by one or more of the constituent materials subsequent to capture. The detector may contain more than one neutron-sensitive component.

Bell, Zane W. (Oak Ridge, TN); Burger, Arnold (Knoxville, TN)

2010-03-30T23:59:59.000Z

335

Amorphous silicon radiation detectors  

DOE Patents [OSTI]

Hydrogenated amorphous silicon radiation detector devices having enhanced signal are disclosed. Specifically provided are transversely oriented electrode layers and layered detector configurations of amorphous silicon, the structure of which allow high electric fields upon application of a bias thereby beneficially resulting in a reduction in noise from contact injection and an increase in signal including avalanche multiplication and gain of the signal produced by incoming high energy radiation. These enhanced radiation sensitive devices can be used as measuring and detection means for visible light, low energy photons and high energy ionizing particles such as electrons, x-rays, alpha particles, beta particles and gamma radiation. Particular utility of the device is disclosed for precision powder crystallography and biological identification.

Street, Robert A. (Palo Alto, CA); Perez-Mendez, Victor (Berkeley, CA); Kaplan, Selig N. (El Cerrito, CA)

1992-01-01T23:59:59.000Z

336

Amorphous silicon radiation detectors  

DOE Patents [OSTI]

Hydrogenated amorphous silicon radiation detector devices having enhanced signal are disclosed. Specifically provided are transversely oriented electrode layers and layered detector configurations of amorphous silicon, the structure of which allow high electric fields upon application of a bias thereby beneficially resulting in a reduction in noise from contact injection and an increase in signal including avalanche multiplication and gain of the signal produced by incoming high energy radiation. These enhanced radiation sensitive devices can be used as measuring and detection means for visible light, low energy photons and high energy ionizing particles such as electrons, x-rays, alpha particles, beta particles and gamma radiation. Particular utility of the device is disclosed for precision powder crystallography and biological identification. 13 figs.

Street, R.A.; Perez-Mendez, V.; Kaplan, S.N.

1992-11-17T23:59:59.000Z

337

Ionizing radiation detector  

DOE Patents [OSTI]

An ionizing radiation detector is provided which is based on the principle of analog electronic integration of radiation sensor currents in the sub-pico to nano ampere range between fixed voltage switching thresholds with automatic voltage reversal each time the appropriate threshold is reached. The thresholds are provided by a first NAND gate Schmitt trigger which is coupled with a second NAND gate Schmitt trigger operating in an alternate switching state from the first gate to turn either a visible or audible indicating device on and off in response to the gate switching rate which is indicative of the level of radiation being sensed. The detector can be configured as a small, personal radiation dosimeter which is simple to operate and responsive over a dynamic range of at least 0.01 to 1000 R/hr.

Thacker, Louis H. (Knoxville, TN)

1990-01-01T23:59:59.000Z

338

Pulsed neutron detector  

DOE Patents [OSTI]

A pulsed neutron detector and system for detecting low intensity fast neutron pulses has a body of beryllium adjacent a body of hydrogenous material the latter of which acts as a beta particle detector, scintillator, and moderator. The fast neutrons (defined as having En>1.5 MeV) react in the beryllium and the hydrogenous material to produce larger numbers of slow neutrons than would be generated in the beryllium itself and which in the beryllium generate hellium-6 which decays and yields beta particles. The beta particles reach the hydrogenous material which scintillates to yield light of intensity related to the number of fast neutrons. A photomultiplier adjacent the hydrogenous material (scintillator) senses the light emission from the scintillator. Utilization means, such as a summing device, sums the pulses from the photo-multiplier for monitoring or other purposes.

Robertson, deceased, J. Craig (late of Albuquerque, NM); Rowland, Mark S. (Livermore, CA)

1989-03-21T23:59:59.000Z

339

HIGH CHARGE EFFECTS IN SILICON DRIFT DETECTORS WITH LATERAL CONFINEMENT OF ELECTRONS.  

SciTech Connect (OSTI)

A new drift detector prototype which provides suppression of the lateral diffusion of electrons has been tested as a function of the signal charge up to high charge levels, when electrostatic repulsion is not negligible. The lateral diffusion of the electron cloud has been measured for injected charges up to 2 {center_dot} 10{sup 5} electrons. The maximum number of electrons for which the suppression of the lateral spread is effective is obtained.

CASTOLDI,A.; REHAK,P.

1995-10-21T23:59:59.000Z

340

Extruded plastic scintillation detectors  

SciTech Connect (OSTI)

As a way to lower the cost of plastic scintillation detectors, commercially available polystyrene pellets have been used in the production of scintillating materials that can be extruded into different profiles. The selection of the raw materials is discussed. Two techniques to add wavelength shifting dopants to polystyrene pellets and to extrude plastic scintillating strips are described. Data on light yield and transmittance measurements are presented.

Anna Pla-Dalmau, Alan D. Bross and Kerry L. Mellott

1999-04-16T23:59:59.000Z

Note: This page contains sample records for the topic "argon prototype detector" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

Biological detector and method  

DOE Patents [OSTI]

A biological detector includes a conduit for receiving a fluid containing one or more magnetic nanoparticle-labeled, biological objects to be detected and one or more permanent magnets or electromagnet for establishing a low magnetic field in which the conduit is disposed. A microcoil is disposed proximate the conduit for energization at a frequency that permits detection by NMR spectroscopy of whether the one or more magnetically-labeled biological objects is/are present in the fluid.

Sillerud, Laurel; Alam, Todd M; McDowell, Andrew F

2014-04-15T23:59:59.000Z

342

The Brasfield Hydroelectric Project: A model-prototype comparison  

SciTech Connect (OSTI)

Observations made during start-up and operation of the 3 MW Brasfield Hydroelectric Project provide an excellent means of comparing physical model results with the prototype installation. During start-up, the turbine generator unit was operated without the surface vortex suppression grid in place to allow engineers to observe vortex formation without, and later with, the grid. The model performance is reproduced in the prototype with regard to surface vortices. Field data has also been obtained at 0.7 in depth increments to provide dissolved oxygen (D.O.) concentrations profiles in the reservoir and in the nearfield zone surrounding the intake. Parallel D.O. measurements at the powerhouse outlet and 1.6 km downstream of the outlet provide a good means of determining the average depth of water column from which the water was removed. Measurements of model velocities, scaled to the prototype, multiplied times the field measurements of dissolved oxygen (D.O.) concentration and water temperature provide a model-predicted downstream D.O. concentration that also compares well to that measured in the prototype. This paper provides support for an unconventional design technique which may be applicable to many other sites facing similar environmental constraints. The model-prototype comparison also provides a strong verification of the combined use of both physical and mathematical models to solve such a design problem.

Gulliver, J.S.; Voigt, R.L. Jr.; Hibbs, D.E. [Univ. of Minnesota, Minneapolis, MN (United States)] [and others

1995-12-31T23:59:59.000Z

343

Integration of rapid prototyping into design and manufacturing  

SciTech Connect (OSTI)

The introduction of rapid prototyping machines into the marketplace promises to revolutionize the process of producing prototype parts with production-like quality. In the age of concurrent engineering and agile manufacturing, it is necessary to exploit applicable new technologies as soon as they become available. The driving force behind integrating these evolutionary processes into the design and manufacture of prototype parts is the need to reduce lead times and fabrication costs, improve efficiency, and increase flexibility without sacrificing quality. Sandia utilizes Stereolithography (SL) and Selective Laser Sintering (SLS) capabilities to support internal design and manufacturing efforts. SL is used in the design iteration process to produce proof-of-concept models, hands-on models for design reviews, fit-check models, visual aids for manufacturing, and functional parts in assemblies. SLS is used to produce wax patterns for the lost wax process of investment casting in support of an internal Sandia National Laboratories program called FASTCAST which integrates experimental and computational technologies into the investment casting process. This presentation will provide a brief overview of the SL and SLS processes and address our experiences with these technologies from the standpoints of application, accuracy, surface finish, and feature definition. Also presented will be several examples of prototype parts manufactured by the Stereolithography and Selective Laser Sintering rapid prototyping machines.

Atwood, C.L.; McCarty, G.D.; Pardo, B.T.; Bryce, E.A.

1993-10-01T23:59:59.000Z

344

Biointrusion test plan for the Permanent Isolation Surface Barrier Prototype  

SciTech Connect (OSTI)

This document provides a testing and monitoring plan for the biological component of the prototype barrier slated for construction at the Hanford Site. The prototype barrier is an aboveground structure engineered to demonstrate the basic features of an earthen cover system. It is designed to permanently isolate waste from the biosphere. The features of the barrier include multiple layers of soil and rock materials and a low-permeability asphalt sublayer. The surface of the barrier consists of silt loam soil, covered with plants. The barrier sides are reinforced with rock or coarse earthen-fill to protect against wind and water erosion. The sublayers inhibit plant and animal intrusion and percolation of water. A series of tests will be conducted on the prototype barrier over the next several years to evaluate barrier performance under extreme climatic conditions. Plants and animals will play a significant role in the hydrologic and water and wind erosion characteristics of the prototype barrier. Studies on the biological component of the prototype barrier will include work on the initial revegetation of the surface, continued monitoring of the developing plant community, rooting depth and dispersion in the context of biointrusion potential, the role of plants in the hydrology of the surface and toe regions of the barrier, the role of plants in stabilizing the surface against water and wind erosion, and the role of burrowing animals in the hydrology and water and wind erosion of the barrier.

Link, S.O.; Cadwell, L.L.; Brandt, C.A.; Downs, J.L.; Rossi, R.E.; Gee, G.W.

1994-04-01T23:59:59.000Z

345

High-speed, multi-channel detector readout electronics for fast radiation detectors  

SciTech Connect (OSTI)

In this project, we are developing a high speed digital spectrometer that a) captures detector waveforms at rates up to 500 MSPS b) has upgraded event data acquisition with additional data buffers for zero dead time operation c) moves energy calculations to the FPGA to increase spectrometer throughput in fast scintillator applications d) uses a streamlined architecture and high speed data interface for even faster readout to the host PC These features are in addition to the standard functions in our existing spectrometers such as digitization, programmable trigger and energy filters, pileup inspection, data acquisition with energy and time stamps, MCA histograms, and run statistics. In Phase I, we upgraded one of our existing spectrometer designs to demonstrate the key principle of fast waveform capture using a 500 MSPS, 12 bit ADC and a Xilinx Virtex-4 FPGA. This upgraded spectrometer, named P500, performed well in initial tests of energy resolution, pulse shape analysis, and timing measurements, thus achieving item (a) above. In Phase II, we are revising the P500 to build a commercial prototype with the improvements listed in items (b)-(d). As described in the previous report, two devices were built to pursue this goal, named the Pixie-500 and the Pixie-500 Express. The Pixie-500 has only minor improvements from the Phase I prototype and is intended as an early commercial product (its production and part of its development were funded outside the SBIR). It also allows testing of the ADC performance in real applications.The Pixie-500 Express (or Pixie-500e) includes all of the improvements (b)-(d). At the end of Phase II of the project, we have tested and debugged the hardware, firmware and software of the Pixie-500 Express prototype boards delivered 12/3/2010. This proved substantially more complex than anticipated. At the time of writing, all hardware bugs have been fixed, the PCI Express interface is working, the SDRAM has been successfully tested and the SHARC DSP has been booted with preliminary code. All new ICs and circuitry on the prototype are working properly, however some of the planned firmware and software functions have not yet been completely implemented and debugged. Overall, due to the unanticipated complexity of the PCI Express interface, some aspects of the project could not be completed with the time and funds available in Phase II. These aspects will be completed in self-funded Phase III.

Hennig, Wolfgang

2012-06-22T23:59:59.000Z

346

Sensor readout detector circuit  

DOE Patents [OSTI]

A sensor readout detector circuit is disclosed that is capable of detecting sensor signals down to a few nanoamperes or less in a high (microampere) background noise level. The circuit operates at a very low standby power level and is triggerable by a sensor event signal that is above a predetermined threshold level. A plurality of sensor readout detector circuits can be formed on a substrate as an integrated circuit (IC). These circuits can operate to process data from an array of sensors in parallel, with only data from active sensors being processed for digitization and analysis. This allows the IC to operate at a low power level with a high data throughput for the active sensors. The circuit may be used with many different types of sensors, including photodetectors, capacitance sensors, chemically-sensitive sensors or combinations thereof to provide a capability for recording transient events or for recording data for a predetermined period of time following an event trigger. The sensor readout detector circuit has applications for portable or satellite-based sensor systems. 6 figs.

Chu, D.D.; Thelen, D.C. Jr.

1998-08-11T23:59:59.000Z

347

Sensor readout detector circuit  

DOE Patents [OSTI]

A sensor readout detector circuit is disclosed that is capable of detecting sensor signals down to a few nanoamperes or less in a high (microampere) background noise level. The circuit operates at a very low standby power level and is triggerable by a sensor event signal that is above a predetermined threshold level. A plurality of sensor readout detector circuits can be formed on a substrate as an integrated circuit (IC). These circuits can operate to process data from an array of sensors in parallel, with only data from active sensors being processed for digitization and analysis. This allows the IC to operate at a low power level with a high data throughput for the active sensors. The circuit may be used with many different types of sensors, including photodetectors, capacitance sensors, chemically-sensitive sensors or combinations thereof to provide a capability for recording transient events or for recording data for a predetermined period of time following an event trigger. The sensor readout detector circuit has applications for portable or satellite-based sensor systems.

Chu, Dahlon D. (Albuquerque, NM); Thelen, Jr., Donald C. (Bozeman, MT)

1998-01-01T23:59:59.000Z

348

Nanowire-based detector  

DOE Patents [OSTI]

Systems, articles, and methods are provided related to nanowire-based detectors, which can be used for light detection in, for example, single-photon detectors. In one aspect, a variety of detectors are provided, for example one including an electrically superconductive nanowire or nanowires constructed and arranged to interact with photons to produce a detectable signal. In another aspect, fabrication methods are provided, including techniques to precisely reproduce patterns in subsequently formed layers of material using a relatively small number of fabrication steps. By precisely reproducing patterns in multiple material layers, one can form electrically insulating materials and electrically conductive materials in shapes such that incoming photons are redirected toward a nearby electrically superconductive materials (e.g., electrically superconductive nanowire(s)). For example, one or more resonance structures (e.g., comprising an electrically insulating material), which can trap electromagnetic radiation within its boundaries, can be positioned proximate the nanowire(s). The resonance structure can include, at its boundaries, electrically conductive material positioned proximate the electrically superconductive nanowire such that light that would otherwise be transmitted through the sensor is redirected toward the nanowire(s) and detected. In addition, electrically conductive material can be positioned proximate the electrically superconductive nanowire (e.g. at the aperture of the resonant structure), such that light is directed by scattering from this structure into the nanowire.

Berggren, Karl K; Hu, Xiaolong; Masciarelli, Daniele

2014-06-24T23:59:59.000Z

349

Optical ionization detector  

DOE Patents [OSTI]

An optical ionization detector wherein a beam of light is split so that one arm passes through a fiber optics and the other arm passes through a gas-filled region, and uses interferometry to detect density changes in a gas when charged particles pass through it. The gas-filled region of the detector is subjected to a high electric field and as a charged particle traverses this gas region electrons are freed from the cathode and accelerated so as to generate an electron avalanche which is collected on the anode. The gas density is effected by the electron avalanche formation and if the index or refraction is proportional to the gas density the index will change accordingly. The detector uses this index change by modulating the one arm of the split light beam passing through the gas, with respect to the other arm that is passed through the fiber optic. Upon recombining of the beams, interference fringe changes as a function of the index change indicates the passage of charged particles through the gaseous medium. 3 figures.

Wuest, C.R.; Lowry, M.E.

1994-03-29T23:59:59.000Z

350

Optical ionization detector  

DOE Patents [OSTI]

An optical ionization detector wherein a beam of light is split so that one arm passes through a fiber optics and the other arm passes through a gas-filled region, and uses interferometry to detect density changes in a gas when charged particles pass through it. The gas-filled region of the detector is subjected to a high electric field and as a charged particle traverses this gas region electrons are freed from the cathode and accelerated so as to generate an electron avalanche which is collected on the anode. The gas density is effected by the electron avalanche formation and if the index or refraction is proportional to the gas density the index will change accordingly. The detector uses this index change by modulating the one arm of the split light beam passing through the gas, with respect to the other arm that is passed through the fiber optic. Upon recombining of the beams, interference fringe changes as a function of the index change indicates the passage of charged particles through the gaseous medium.

Wuest, Craig R. (Danville, CA); Lowry, Mark E. (Castro Valley, CA)

1994-01-01T23:59:59.000Z

351

The STAR Vertex Position Detector  

E-Print Network [OSTI]

The 2x3 channel pseudo Vertex Position Detector (pVPD) in the STAR experiment at RHIC has been upgraded to a 2x19 channel detector in the same acceptance, called the Vertex Position Detector (VPD). This detector is fully integrated into the STAR trigger system and provides the primary input to the minimum-bias trigger in Au+Au collisions. The information from the detector is used both in the STAR Level-0 trigger and offline to measure the location of the primary collision vertex along the beam pipe and the event "start time" needed by other fast-timing detectors in STAR. The offline timing resolution of single detector channels in full-energy Au+Au collisions is ~100 ps, resulting in a start time resolution of a few tens of picoseconds and a resolution on the primary vertex location of ~1 cm.

W. J. Llope; J. Zhou; T. Nussbaum; G. W. Hoffmann; K. Asselta; J. D. Brandenburg; J. Butterworth; T. Camarda; W. Christie; H. J. Crawford; X. Dong; J. Engelage; G. Eppley; F. Geurts; J. Hammond; E. Judd; D. L. McDonald; C. Perkins; L. Ruan; J. Scheblein; J. J. Schambach; R. Soja; K. Xin; C. Yang

2014-03-26T23:59:59.000Z

352

Prototype Vector Machine for Large Scale Semi-Supervised Learning  

SciTech Connect (OSTI)

Practicaldataminingrarelyfalls exactlyinto the supervisedlearning scenario. Rather, the growing amount of unlabeled data poses a big challenge to large-scale semi-supervised learning (SSL). We note that the computationalintensivenessofgraph-based SSLarises largely from the manifold or graph regularization, which in turn lead to large models that are dificult to handle. To alleviate this, we proposed the prototype vector machine (PVM), a highlyscalable,graph-based algorithm for large-scale SSL. Our key innovation is the use of"prototypes vectors" for effcient approximation on both the graph-based regularizer and model representation. The choice of prototypes are grounded upon two important criteria: they not only perform effective low-rank approximation of the kernel matrix, but also span a model suffering the minimum information loss compared with the complete model. We demonstrate encouraging performance and appealing scaling properties of the PVM on a number of machine learning benchmark data sets.

Zhang, Kai; Kwok, James T.; Parvin, Bahram

2009-04-29T23:59:59.000Z

353

An environment for the rapid prototyping of user interfaces  

E-Print Network [OSTI]

, Tom Slade, Mark Lease, Randy Duncan. Mike O'Neah and John DeSoi. Also. thanks go to the Lockheed Software Technology Center and the Texas A&M Laboratory for Software Research for the funding and inspiration for this research. vi TABLE OF CO... Requirements GSS Prototypes . Prototype Application Display Generator Icon Generator Research Overview I I BACKGROUND 3 3 3 4 5 5 6 6 A Specification Language I'or Direct Manipulation User Interfaces LabVIEW . MIKE: Menu Interaction Kontrol...

Harbert, Joe Andrew

1987-01-01T23:59:59.000Z

354

A Compton-Vetoed Germanium Detector with Increased Sensitivity at Low Energies  

SciTech Connect (OSTI)

The difficulty to directly detect plutonium in spent nuclear fuel due to the high Compton background of the fission products motivates the design of a Gamma detector with improved sensitivity at low energies. We have built such a detector by operating a thin high-purity Ge detector with a large scintillator Compton veto directly behind it. The Ge detector is thin to absorb just the low-energy Pu radiation of interest while minimizing Compton scattering of high energy radiation from the fission products. The subsequent scintillator is large so that forward scattered photons from the Ge detector interact in it at least once to provide an anti-coincidence veto for the Ge detector. For highest sensitivity, additional material in the line-of-sight is minimized, the radioactive sample is kept thin, and its radiation is collimated. We will discuss the instrument design, and demonstrate the feasibility of the approach with a prototype that employs two large CsI scintillator vetoes. Initial spectra of a thin Cs-137 calibration source show a background suppression of a factor of {approx}2.5 at {approx}100 keV, limited by an unexpectedly thick 4 mm dead layer in the Ge detector.

Friedrich, S; Bates, C; Drury, O B; Burks, M; DiPrete, D

2012-03-29T23:59:59.000Z

355

Test results of a new detector system for gamma ray isotopic measurements  

SciTech Connect (OSTI)

A new type of gamma-ray detector system for isotopic measurements has been developed. This new system, a ``Duo detector`` array, consists of two intrinsic germanium detectors, a planar followed by a coaxial mounted on the same axis within a single cryostat assembly. This configuration allows the isotopic analysis system to take advantage of spectral data results that are collected simultaneously from different gamma-ray energy regimes. Princeton Gamma Tech (PGT) produced several prototypes of this Duo detector array which were then tested by Rocky Flats personnel until the design was optimized. An application for this detector design is in automated, roboticized NDA systems such as those being developed at the Los Alamos TA-55 Plutonium Facility. The Duo detector design reduces the space necessary for the isotopic instrument by a factor of two (only one liquid nitrogen dewar is needed), and also reduces the complexity of the mechanical systems and controlling software. Data will be presented on measurements of nuclear material with a Duo detector for a wide variety of matrices. Results indicate that the maximum count rate can be increased up to 100,000 counts per second yet maintaining excellent resolution and energy rate product.

Malcom, J.E.; Bonner, C.A.; Hurd, J.R. [Los Alamos National Lab., NM (United States); Fleissner, [EG and G Rocky Flats, Inc., Golden, CO (United States)

1993-08-01T23:59:59.000Z

356

PDID: Pulsed-Discharge Ionization Detector A new detector for...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

ppb sensitivity (1 gkg) * Near universal detector * Hand-portable * Push button automation MicroChemlab VOC Biomarker Diagnosis Advantages Radical shift in diagnosis...

357

Wire-inhomogeneity detector  

DOE Patents [OSTI]

A device for uncovering imperfections in electrical conducting wire, particularly superconducting wire, by detecting variations in eddy currents. Eddy currents effect the magnetic field in a gap of an inductor, contained in a modified commercial ferrite core, through which the wire being tested is passed. A small increase or decrease in the amount of conductive material, such as copper, in a fixed cross section of wire will unbalance a bridge used to measure the impedance of the inductor, tripping a detector and sounding an alarm.

Gibson, G.H.; Smits, R.G.; Eberhard, P.H.

1982-08-31T23:59:59.000Z

358

Liquid level detector  

DOE Patents [OSTI]

A liquid level detector for low pressure boilers. A boiler tank, from which apor, such as steam, normally exits via a main vent, is provided with a vertical side tube connected to the tank at the desired low liquid level. When the liquid level falls to the level of the side tube vapor escapes therethrough causing heating of a temperature sensitive device located in the side tube, which, for example, may activate a liquid supply means for adding liquid to the boiler tank. High liquid level in the boiler tank blocks entry of vapor into the side tube, allowing the temperature sensitive device to cool, for example, to ambient temperature.

Grasso, Albert P. (Vernon, CT)

1986-01-01T23:59:59.000Z

359

Flexible composite radiation detector  

DOE Patents [OSTI]

A flexible composite scintillator was prepared by mixing fast, bright, dense rare-earth doped powdered oxyorthosilicate (such as LSO:Ce, LSO:Sm, and GSO:Ce) scintillator with a polymer binder. The binder is transparent to the scintillator emission. The composite is seamless and can be made large and in a wide variety of shapes. Importantly, the composite can be tailored to emit light in a spectral region that matches the optimum response of photomultipliers (about 400 nanometers) or photodiodes (about 600 nanometers), which maximizes the overall detector efficiency.

Cooke, D. Wayne (Santa Fe, NM); Bennett, Bryan L. (Los Alamos, NM); Muenchausen, Ross E. (Los Alamos, NM); Wrobleski, Debra A. (Los Alamos, NM); Orler, Edward B. (Los Alamos, NM)

2006-12-05T23:59:59.000Z

360

Ionizing Radiation Detector  

DOE Patents [OSTI]

A CdZnTe (CZT) crystal provided with a native CdO dielectric coating to reduce surface leakage currents and thereby, improve the resolution of instruments incorporating detectors using CZT crystals is disclosed. A two step process is provided for forming the dielectric coating which includes etching the surface of a CZT crystal with a solution of the conventional bromine/methanol etch treatment, and passivating the CZT crystal surface with a solution of 10 w/o NH.sub.4 F and 10 w/o H.sub.2 O.sub.2 in water after attaching electrical contacts to the crystal surface.

Wright, Gomez W. (Nashville, TN); James, Ralph B. (Livermore, CA); Burger, Arnold (Nashville, TN); Chinn, Douglas A. (Livermore, CA)

2003-11-18T23:59:59.000Z

Note: This page contains sample records for the topic "argon prototype detector" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

Avalanche semiconductor radiation detectors  

SciTech Connect (OSTI)

Operation of novel avalanche semiconductor detector, produced on the basis of heterojunctions Si-SiC and Si-Si{sub x}O{sub y} is described. A uniform avalanche process with gain from 10{sup 3} to 10{sup 5} can be reached depending on the conductivity of SiC and Si{sub x}O{sub y} layers. Two types of avalanche photodetectors designed for applications in wavelength range 500--10,00 nm with quantum efficiency 60 {+-} 10% (650 nm) and 200--700 nm with quantum efficiency 60 {+-} 15% (450 nm) are presented.

Sadygov, Z.Y. [Joint Inst. for Nuclear Research, Dubna (Russian Federation)] [Joint Inst. for Nuclear Research, Dubna (Russian Federation); [Azerbaijan Academy of Sciences, Baku (Azerbaijan). Physics Inst.; Zheleznykh, I.M.; Kirillova, T.A. [Russian Academy of Sciences, Moscow (Russian Federation). Inst. for Nuclear Research] [Russian Academy of Sciences, Moscow (Russian Federation). Inst. for Nuclear Research; Malakhov, N.A.; Jejer, V.N. [Joint Inst. for Nuclear Research, Dubna (Russian Federation)] [Joint Inst. for Nuclear Research, Dubna (Russian Federation)

1996-06-01T23:59:59.000Z

362

Liquid level detector  

DOE Patents [OSTI]

A liquid level detector for low pressure boilers. A boiler tank, from which vapor, such as steam, normally exits via a main vent, is provided with a vertical side tube connected to the tank at the desired low liquid level. When the liquid level falls to the level of the side tube vapor escapes therethrough causing heating of a temperature sensitive device located in the side tube, which, for example, may activate a liquid supply means for adding liquid to the boiler tank. High liquid level in the boiler tank blocks entry of vapor into the side tube, allowing the temperature sensitive device to cool, for example, to ambient temperature.

Grasso, A.P.

1984-02-21T23:59:59.000Z

363

Pyroelectric demodulating detector  

DOE Patents [OSTI]

A pyroelectric demodulating detector (also termed a pyroelectric demodulator) is disclosed which utilizes an electrical resistor stacked upon a pyroelectric element to demodulate an rf or microwave electrical input signal which is amplitude-modulated (AM). The pyroelectric demodulator, which can be formed as a hybrid or a monolithic device, has applications for use in AM radio receivers. Demodulation is performed by feeding the AM input signal into the resistor and converting the AM input signal into an AM heat signal which is conducted through the pyroelectric element and used to generate an electrical output signal containing AM information from the AM input signal.

Brocato, Robert W. (Sandia Park, NM)

2008-07-08T23:59:59.000Z

364

XAMPS Detectors Readout ASIC for LCLS  

SciTech Connect (OSTI)

An ASIC for the readout of signals from X-ray Active Matrix Pixel Sensor (XAMPS) detectors to be used at the Linac Coherent Light Source (LCLS) is presented. The X-ray Pump Probe (XPP) instrument, for which the ASIC has been designed, requires a large input dynamic range on the order of 104 photons at 8 keV with a resolution of half a photon FWHM. Due to the size of the pixel and the length of the readout line, large input capacitance is expected, leading to stringent requirement on the noise optimization. Furthermore, the large number of pixels needed for a good position resolution and the fixed LCLS beam period impose limitations on the time available for the single pixel readout. Considering the periodic nature of the LCLS beam, the ASIC developed for this application is a time-variant system providing low-noise charge integration, filtering and correlated double sampling. In order to cope with the large input dynamic range a charge pump scheme implementing a zero-balance measurement method has been introduced. It provides an on chip 3-bit coarse digital conversion of the integrated charge. The residual charge is sampled using correlated double sampling into analog memory and measured with the required resolution. The first 64 channel prototype of the ASIC has been fabricated in TSMC CMOS 0.25 {micro}m technology. In this paper, the ASIC architecture and performances are presented.

Dragone, A; /SLAC; Pratte, J.F.; Rehak, P.; /Brookhaven; Carini, G.A.; /BNL, NSLS; Herbst, R.; /SLAC; O'Connor, P.; /Brookhaven; Siddons, D.P.; /BNL, NSLS

2008-12-18T23:59:59.000Z

365

Color Rapid Prototyping for Diffusion-Tensor MRI Visualization  

E-Print Network [OSTI]

. Laidlaw, Christopher W. Bull Brown University, Providence, RI 02912, USA a) b) c) Fig. 1. (a,b) A plaster color rapid prototyping (RP) plaster mod- els as visualization tools to support scientific research by the printer software. These layers are then manufactured by putting down a thin layer of plaster powder

Laidlaw, David

366

MATLAB tensor classes for fast algorithm prototyping : source code.  

SciTech Connect (OSTI)

We present the source code for three MATLAB classes for manipulating tensors in order to allow fast algorithm prototyping. A tensor is a multidimensional or Nway array. This is a supplementary report; details on using this code are provided separately in SAND-XXXX.

Bader, Brett William; Kolda, Tamara Gibson (Sandia National Laboratories, Livermore, CA)

2004-10-01T23:59:59.000Z

367

UDC Develops Prototype High-Efficiency OLED Undercabinet Luminaire  

Broader source: Energy.gov [DOE]

Universal Display Corporation (UDC) has demonstrated the real-world application of a novel lighting technology by developing two pre-prototype OLED undercabinet lighting systems that exceed 420 total lumens at an efficacy of more than 55 lm/W, with an estimated lifetime (LT70) in excess of 10,000 hours, and a color rendering index (CRI) greater than 85.

368

Carbon Fiber Components with Integrated Wiring for Millirobot Prototyping *  

E-Print Network [OSTI]

Carbon Fiber Components with Integrated Wiring for Millirobot Prototyping * Ranjana Sahai Erik a simple four bar mechanism as an example. Finally, the tests show that the wiring loop over a flexure the folded stainless steel triangles and polyester flexures. Hence, we decided to use carbon fiber instead

Fearing, Ron

369

Hydrodynamic Tesla Wheel Flume for Model and Prototype Testing  

E-Print Network [OSTI]

The Tesla turbine, U.S. Patent 1,061,206 -- May 6, 1913 was invented by Nikola Tesla as a means to extractHydrodynamic Tesla Wheel Flume for Model and Prototype Testing Spencer Jenkins, Chris Scott, Jacob Engineering department at Florida Institute of Technology (Florida Tech) has developed a Hydrodynamic Tesla

Wood, Stephen L.

370

Los Alamos National Laboratory Prototype Fabrication Division CNM Briefing  

SciTech Connect (OSTI)

Prototype Fabrication Division designs, programs, manufactures, and inspects on-site high quality, diverse material parts and components that can be delivered at the pace the customer needs to meet their mission. Our goal is to bring vision to reality in the name of science.

Hidalgo, Stephen P. [Los Alamos National Laboratory; Keyser, Richard J. [Los Alamos National Laboratory

2012-06-18T23:59:59.000Z

371

A Prototype Robot Speech Interface with Multimodal Feedback Mathias Haage+  

E-Print Network [OSTI]

of industrial robot arms. The aim of the prototype is to develop a speech system for designing robot trajectories that would fit well with current CAD paradigms. 1 Introduction Industrial robot programming developed for studying multimodal user interfaces in the context of industrial robot programming [5

Nugues, Pierre

372

A Centrality Detector Concept  

E-Print Network [OSTI]

The nucleus-nucleus impact parameter and collision geometry of a heavy ion collision are typically characterized by assigning a collision "centrality". In all present heavy ion experiments centrality is measured indirectly, by detecting the number of particles or the energy of the particles produced in the interactions, typically at high rapidity. Centrality parameters are associated to the measured detector response using the Glauber model. This approach suffers from systematic uncertainties related to the assumptions about the particle production mechanism and limitations of the Glauber model. In the collider based experiments there is a unique possibility to measure centrality parameters by registering spectator fragments remaining from the collision. This approach does not require model assumptions and relies on the fact that spectators and participants are related via the total number of nucleons in the colliding species. This article describes the concept of the centrality detector for heavy ion experiment, which measures the total mass number of all fragments by measuring their deflection in the magnetic field of the collider elements.

Sourav Tarafdar; Zvi Citron; Alexander Milov

2014-06-07T23:59:59.000Z

373

Efficiencies of Quantum Optical Detectors  

E-Print Network [OSTI]

We propose a definition for the efficiency that can be universally applied to all classes of quantum optical detectors. This definition is based on the maximum amount of optical loss that a physically plausible device can experience while still replicating the properties of a given detector. We prove that detector efficiency cannot be increased using linear optical processing. That is, given a set of detectors, as well as arbitrary linear optical elements and ancillary light sources, it is impossible to construct detection devices that would exhibit higher efficiencies than the initial set.

Daniel Hogg; Dominic W. Berry; A. I. Lvovsky

2014-12-15T23:59:59.000Z

374

A Large Liquid Argon TPC for Off-axis NuMI Neutrino Physics  

SciTech Connect (OSTI)

The ICARUS collaboration has shown the power of the liquid argon time projection chamber (LArTPC) technique to image events with bubble-chamber-like quality. I will describe a proposed long-baseline {nu}e appearance experiment utilizing a large ({>=} 15 kton1) LArTPC placed off-axis of Fermilab's NuMI {nu}{mu} beam. The total LArTPC program as it presently stands, which includes a number of smaller R and D projects designed to examine the key design issues, will be outlined.

Menary, Scott [York University, Toronto (Canada)

2006-07-11T23:59:59.000Z

375

Preparation of a primary argon beam for the CERN fixed target physics  

SciTech Connect (OSTI)

The fixed target experiment NA61 in the North Area of the Super Proton Synchrotron is studying phase transitions in strongly interacting matter. Up to now they used the primary beams available from the CERN accelerator complex (protons and lead ions) or fragmented beams created from the primary lead ion beam. To explore a wider range of energies and densities a request was made to provide primary argon and xenon beams. This paper describes the results of the setting up and 10 week test run of the Ar{sup 11+} beam from the 14.5 GHz ECR ion source and the linear accelerator (Linac3) at CERN.

Küchler, D., E-mail: detlef.kuchler@cern.ch; O’Neil, M.; Scrivens, R. [CERN, BE Department, 1211 Geneva 23 (Switzerland)] [CERN, BE Department, 1211 Geneva 23 (Switzerland); Thomae, R. [iThemba LABS, P.O. Box 722, Somerset West 7130 (South Africa)] [iThemba LABS, P.O. Box 722, Somerset West 7130 (South Africa)

2014-02-15T23:59:59.000Z

376

Ultrasonic attenuation and volume viscosity in liquid argon, nitrogen and helium  

E-Print Network [OSTI]

/cm . Measurements taken at densities from 2 1. 06 to 1. 42 g/cm result in values of 2. 3 to 0. 8 for the ratio of volume to shear viscosity. These values are compared with theoretical predictions of other investigators. It appears that the volume viscosity...ULTRASOM IC A'ITEN UAT IOM AMD VOLUME VISCOSITY IM LIQUID ARGON, "IITROGEV AMD MET IUM A Thesis by JAMES ROBFRT SI'%GER Submitted to the Graduate College of the Texas AgM University in partial fulfillment of the requirements for the degree...

Singer, James Robert

1967-01-01T23:59:59.000Z

377

The Physics Analysis of a Gas Attenuator with Argon as a Working Gas  

SciTech Connect (OSTI)

A gas attenuator is an important element of the LCLS facility. The attenuator must operate in a broad range of x-ray energies, provide attenuation coefficient between 1 and 10{sup 4} with the accuracy of 1% and, at the same time, be reliable and allow for many months of un-interrupted operation. S. Shen has recently carried out a detailed design study of the attenuator based on the use of nitrogen as a working gas. In this note we assess the features of the attenuator based on the use of argon. We concentrate on the physics issues, not the design features.

Ryutov,, D.D.

2010-12-07T23:59:59.000Z

378

CDF Run IIb Silicon Vertex Detector DAQ Upgrade  

SciTech Connect (OSTI)

The CDF particle detector operates in the beamline of the Tevatron proton-antiproton collider at Fermilab, Batavia, IL. The Tevatron is expected to undergo luminosity upgrades (Run IIb) in the future, resulting in a higher number of interactions per beam crossing. To operate in this dense radiation environment, an upgrade of CDF's silicon vertex detector (SVX) subsystem and a corresponding upgrade of its VME-based DAQ system has been explored. Prototypes of all the Run IIb SVX DAQ components have been constructed, assembled into a test stand and operated successfully using an adapted version of CDF's network-capable DAQ software. In addition, a PCI-based DAQ system has been developed as a fast and inexpensive tool for silicon detector and DAQ component testing in the production phase. In this paper they present an overview of the Run IIb silicon DAQ upgrade, emphasizing the new features and improvements incorporated into the constituent VME boards, and discuss a PCI-based DAQ system developed to facilitate production tests.

S. Behari et al.

2003-12-18T23:59:59.000Z

379

Novel Boron-10-based detectors for Neutron Scattering Science  

E-Print Network [OSTI]

Nowadays neutron scattering science is increasing its instrumental power. Most of the neutron sources in the world are pushing the development of their technologies to be more performing. The neutron scattering development is also pushed by the European Spallation Source (ESS) in Sweden, a neutron facility which has just started construction. Concerning small area detectors (1m^2), the 3He technology, which is today cutting edge, is reaching fundamental limits in its development. Counting rate capability, spatial resolution and cost-e?ectiveness, are only a few examples of the features that must be improved to ful?fill the new requirements. On the other hand, 3He technology could still satisfy the detector requirements for large area applications (50m^2), however, because of the present 3He shortage that the world is experiencing, this is not practical anymore. The recent detector advances (the Multi-Grid and the Multi-Blade prototypes) developed in the framework of the collaboration between the Institut Laue...

Piscitelli, Francesco

2015-01-01T23:59:59.000Z

380

Direct Methanol Fuel Cell Prototype Demonstration for Consumer Electronics Applications  

SciTech Connect (OSTI)

This report is the final technical report for DOE Program DE-FC36-04GO14301 titled “Direct Methanol Fuel Cell Prototype Demonstration for Consumer Electronics Applications”. Due to the public nature of this report some of the content reported in confidential reports and meetings to the DOE is not covered in detail in this report and some of the content has been normalized to not show actual values. There is a comparison of the projects accomplishments with the objectives, an overview of some of the key subsystem work, and a review of the three levels of prototypes demonstrated during the program. There is also a description of the eventual commercial product and market this work is leading towards. The work completed under this program has significantly increased the understanding of how Direct Methanol Fuel Cells (DMFC) can be deployed successfully to power consumer electronic devices. The prototype testing has demonstrated the benefits a direct methanol fuel cell system has over batteries typically used for powering consumer electronic devices. Three generations of prototypes have been developed and tested for performance, robustness and life. The technologies researched and utilized in the fuel cell stack and related subsystems for these prototypes are leveraged from advances in other industries such as the hydrogen fueled PEM fuel cell industry. The work under this program advanced the state of the art of direct methanol fuel cells. The system developed by MTI micro fuel cells aided by this program differs significantly from conventional DMFC designs and offers compelling advantages in the areas of performance, life, size, and simplicity. The program has progressed as planned resulting in the completion of the scope of work and available funding in December 2008. All 18 of the final P3 prototypes builds have been tested and the results showed significant improvements over P2 prototypes in build yield, initial performance, and durability. The systems have demonstrated robust operation when tested at various orientations, temperatures, and humidity levels. Durability testing has progressed significantly over the course of the program. MEA, engine, and system level steady state testing has demonstrated degradation rates acceptable for initial product introduction. Test duration of over 5000 hrs has been achieved at both the MEA and breadboard system level. P3 level prototype life testing on engines (stacks with reactant conditioning) showed degradation rates comparable to carefully constructed lab fixtures. This was a major improvement over the P2 and P1 engine designs, which exhibited substantial reductions in life and performance between the lab cell and the actual engine. Over the course of the work on the P3 technology set, a platform approach was taken to the system design. By working in this direction, a number of product iterations with substantial market potential were identified. Although the main effort has been the development of a prototype charger for consumer electronic devices, multiple other product concepts were developed during the program showing the wide variety of potential applications.

Carlstrom, Charles, M., Jr.

2009-07-07T23:59:59.000Z

Note: This page contains sample records for the topic "argon prototype detector" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

Neutrino Physics and Dark Matter Physics with Ultra-Low-Energy Germanium Detector  

SciTech Connect (OSTI)

The status and plans of the TEXONO Collaboration on the development of ultra-low-energy germanium detectors with sub-keV sensitivities are reported. We survey the scientific goals which include the observation of neutrino-nucleus coherent scattering, the studies of neutrino magnetic moments, as well as the searches of WIMP dark matter. In particular, an energy threshold of 220{+-}10 eV at an efficiency of 50% were achieved with a four-channel prototype detectors each of an active mass of 5 g. New limits were set for WIMPs with mass between 3-6 GeV. The prospects of the realization of full-scale experiments are discussed. This detector technique makes the unexplored sub-keV energy window accessible for new neutrino and dark matter experiments.

Shin-Ted, Lin [Institute of Physics, Academia Sinica, Taipei 11529, Taiwan (China)

2008-10-10T23:59:59.000Z

382

Progress in the use of pixel detectors in double beta decay experiment TGV  

SciTech Connect (OSTI)

The TGV collaboration has been investigating two neutrino double electron capture (2?EC/EC) in {sup 106}Cd since 2000. The double beta experiments would answer some of the puzzling problems about neutrinos (e.g. nature and mass) but one of the main challenges is the background events. The collaboration is investigating the use of pixel detectors in such rare decay experiments. Pixel detector gives spatial information along with energy of the particle, thus provides useful information to reduce the background. The collaboration has proposed a Silicon Pixel Telescope (SPT) for the next generation experiment; where a pair of Si pixel detectors with enriched Cd foil in the middle forms the detection unit. A prototype unit of SPT has been constructed and results of preliminary background measurements performed on the surface and in the underground laboratories are presented.

Jose, J. M. [Institute of Experimental and Applied Physics, Czech Technical University in Prague, Horska 3a/22, 12800 Prague 2 (Czech Republic); Collaboration: TGV Collaboration

2013-12-30T23:59:59.000Z

383

The large-area hybrid-optics CLAS12 RICH detector: Tests of innovative components  

SciTech Connect (OSTI)

A large area ring-imaging Cherenkov detector has been designed to provide clean hadron identification capability in the momentum range from 3 GeV/c to 8 GeV/c for the CLAS12 experiments at the upgraded 12 GeV continuous electron beam accelerator facility of Jefferson Lab to study the 3D nucleon structure in the yet poorly explored valence region by deep-inelastic scattering, and to perform precision measurements in hadronization and hadron spectroscopy. The adopted solution foresees a novel hybrid optics design based on an aerogel radiator, composite mirrors and densely packed and highly segmented photon detectors. Cherenkov light will either be imaged directly (forward tracks) or after two mirror reflections (large angle tracks). The preliminary results of individual detector component tests and of the prototype performance at test-beams are reported here.

Contalbrigo, M.; Baltzell, N.; Benmokhtar, F.; Barion, L.; Cisbani, E.; El Alaoui, A.; Hafidi, K.; Hoek, M.; Kubarovsky, V.; Lagamba, L.; Lucherini, V.; Malaguti, R.; Mirazita, M.; Montgomery, R.; Movsisyan, A.; Musico, P.; Orecchini, D.; Orlandi, A.; Pappalardo, L.L.; Pereira, S.; Perrino, R.; Phillips, J.; Pisano, S.; Rossi, P.; Squerzanti, S.; Tomassini, S.; Turisini, M.; Viticchiè, A.

2014-07-01T23:59:59.000Z

384

Preprint typeset in JINST style -HYPER VERSION Cosmic Muon Flux Measurements at the  

E-Print Network [OSTI]

detectors probing the properties of neutrinos, the ex- istence of dark matter and double -decay [1]. Besides in pure Argon for future dark matter experiments [13, 14], and a gamma-counting facility all lo- cated at the 1450 m.w.e. level. KURF also hosts the WATCHBOY [15] detector, a prototype for a water-based reactor

385

Theoretical investigation of the effect of hydrogen addition on the formation and properties of soliton in direct current argon plasma  

SciTech Connect (OSTI)

In this study the effect of hydrogen addition on the formation and properties of soliton in direct-current (DC) argon plasma is theoretically investigated. By coupling fluid equations with Poisons equation for such multi-component plasma, the Mach number and amplitude of the soliton are determined following pseudo potential method. Addition of hydrogen in argon discharge leads to the decrease of electron, Ar{sup +} ion density while a reverse trend was observed for ArH{sup +} and hydrogen like ions. It was found that presence of hydrogen like ions in argon plasma affects the formation of soliton with its amplitude significantly decreases as concentration of hydrogen increases. On the other hand, increase in ion to electron temperature ratios of the lighter ions in the discharge also has a significant influence on the amplitude and formation of soliton. The inverse relation between solitons width and amplitude is found to be consistent for the entire range of study.

Saikia, P., E-mail: partha.008@gmail.com; Goswami, K. S.; Saikia, B. K. [Centre of Plasma Physics, Institute for Plasma Research, Nazirakhat, Sonapur, Kamrup, Assam-782 402 (India)] [Centre of Plasma Physics, Institute for Plasma Research, Nazirakhat, Sonapur, Kamrup, Assam-782 402 (India)

2014-03-15T23:59:59.000Z

386

Porous material neutron detector  

DOE Patents [OSTI]

A neutron detector employs a porous material layer including pores between nanoparticles. The composition of the nanoparticles is selected to cause emission of electrons upon detection of a neutron. The nanoparticles have a maximum dimension that is in the range from 0.1 micron to 1 millimeter, and can be sintered with pores thereamongst. A passing radiation generates electrons at one or more nanoparticles, some of which are scattered into a pore and directed toward a direction opposite to the applied electrical field. These electrons travel through the pore and collide with additional nanoparticles, which generate more electrons. The electrons are amplified in a cascade reaction that occurs along the pores behind the initial detection point. An electron amplification device may be placed behind the porous material layer to further amplify the electrons exiting the porous material layer.

Diawara, Yacouba (Oak Ridge, TN); Kocsis, Menyhert (Venon, FR)

2012-04-10T23:59:59.000Z

387

Event counting alpha detector  

DOE Patents [OSTI]

An electrostatic detector is disclosed for atmospheric radon or other weak sources of alpha radiation. In one embodiment, nested enclosures are insulated from one another, open at the top, and have a high voltage pin inside and insulated from the inside enclosure. An electric field is produced between the pin and the inside enclosure. Air ions produced by collision with alpha particles inside the decay volume defined by the inside enclosure are attracted to the pin and the inner enclosure. With low alpha concentrations, individual alpha events can be measured to indicate the presence of radon or other alpha radiation. In another embodiment, an electrical field is produced between parallel plates which are insulated from a single decay cavity enclosure. 6 figs.

Bolton, R.D.; MacArthur, D.W.

1996-08-27T23:59:59.000Z

388

Particle detector spatial resolution  

DOE Patents [OSTI]

Method and apparatus for producing separated columns of scintillation layer material, for use in detection of X-rays and high energy charged particles with improved spatial resolution is disclosed. A pattern of ridges or projections is formed on one surface of a substrate layer or in a thin polyimide layer, and the scintillation layer is grown at controlled temperature and growth rate on the ridge-containing material. The scintillation material preferentially forms cylinders or columns, separated by gaps conforming to the pattern of ridges, and these columns direct most of the light produced in the scintillation layer along individual columns for subsequent detection in a photodiode layer. The gaps may be filled with a light-absorbing material to further enhance the spatial resolution of the particle detector. 12 figs.

Perez-Mendez, V.

1992-12-15T23:59:59.000Z

389

Particle detector spatial resolution  

DOE Patents [OSTI]

Method and apparatus for producing separated columns of scintillation layer material, for use in detection of X-rays and high energy charged particles with improved spatial resolution. A pattern of ridges or projections is formed on one surface of a substrate layer or in a thin polyimide layer, and the scintillation layer is grown at controlled temperature and growth rate on the ridge-containing material. The scintillation material preferentially forms cylinders or columns, separated by gaps conforming to the pattern of ridges, and these columns direct most of the light produced in the scintillation layer along individual columns for subsequent detection in a photodiode layer. The gaps may be filled with a light-absorbing material to further enhance the spatial resolution of the particle detector.

Perez-Mendez, Victor (Berkeley, CA)

1992-01-01T23:59:59.000Z

390

Imaging alpha particle detector  

DOE Patents [OSTI]

A method and apparatus for detecting and imaging alpha particles sources is described. A dielectric coated high voltage electrode and a tungsten wire grid constitute a diode configuration discharge generator for electrons dislodged from atoms or molecules located in between these electrodes when struck by alpha particles from a source to be quantitatively or qualitatively analyzed. A thin polyester film window allows the alpha particles to pass into the gas enclosure and the combination of the glass electrode, grid and window is light transparent such that the details of the source which is imaged with high resolution and sensitivity by the sparks produced can be observed visually as well. The source can be viewed directly, electronically counted or integrated over time using photographic methods. A significant increase in sensitivity over other alpha particle detectors is observed, and the device has very low sensitivity to gamma or beta emissions which might otherwise appear as noise on the alpha particle signal.

Anderson, D.F.

1980-10-29T23:59:59.000Z

391

Imaging alpha particle detector  

DOE Patents [OSTI]

A method and apparatus for detecting and imaging alpha particles sources is described. A conducting coated high voltage electrode (1) and a tungsten wire grid (2) constitute a diode configuration discharge generator for electrons dislodged from atoms or molecules located in between these electrodes when struck by alpha particles from a source (3) to be quantitatively or qualitatively analyzed. A thin polyester film window (4) allows the alpha particles to pass into the gas enclosure and the combination of the glass electrode, grid and window is light transparent such that the details of the source which is imaged with high resolution and sensitivity by the sparks produced can be observed visually as well. The source can be viewed directly, electronically counted or integrated over time using photographic methods. A significant increase in sensitivity over other alpha particle detectors is observed, and the device has very low sensitivity to gamma or beta emissions which might otherwise appear as noise on the alpha particle signal.

Anderson, David F. (Los Alamos, NM)

1985-01-01T23:59:59.000Z

392

Event counting alpha detector  

DOE Patents [OSTI]

An electrostatic detector for atmospheric radon or other weak sources of alpha radiation. In one embodiment, nested enclosures are insulated from one another, open at the top, and have a high voltage pin inside and insulated from the inside enclosure. An electric field is produced between the pin and the inside enclosure. Air ions produced by collision with alpha particles inside the decay volume defined by the inside enclosure are attracted to the pin and the inner enclosure. With low alpha concentrations, individual alpha events can be measured to indicate the presence of radon or other alpha radiation. In another embodiment, an electrical field is produced between parallel plates which are insulated from a single decay cavity enclosure.

Bolton, Richard D. (Los Alamos, NM); MacArthur, Duncan W. (Los Alamos, NM)

1996-01-01T23:59:59.000Z

393

Fiber optic fluid detector  

DOE Patents [OSTI]

Particular gases or liquids are detected with a fiber optic element having a cladding or coating of a material which absorbs the fluid or fluids and which exhibits a change of an optical property, such as index of refraction, light transmissiveness or fluoresence emission, for example, in response to absorption of the fluid. The fluid is sensed by directing light into the fiber optic element and detecting changes in the light, such as exit angle changes for example, that result from the changed optical property of the coating material. The fluid detector may be used for such purposes as sensing toxic or explosive gases in the atmosphere, measuring ground water contamination or monitoring fluid flows in industrial processes, among other uses. 10 figs.

Angel, S.M.

1987-02-27T23:59:59.000Z

394

Growth of tungsten nanoparticles in direct-current argon glow discharges  

SciTech Connect (OSTI)

The growth of nanoparticles from the sputtering of a tungsten cathode in DC argon glow discharges is reported. The study was performed at fixed argon pressure and constant discharge current. The growth by successive agglomerations is evidenced. First, tungsten nanocrystallites agglomerate into primary particles, the most probable size of which being {approx}30 nm. Primary particles of this size are observed for all plasma durations and always remain the most numerous in the discharge. Primary particles quickly agglomerate to form particles with size up to {approx}150 nm. For short plasma duration, log-normal functions describe accurately the dust particle size distributions. On the contrary, for long discharge durations, a second hump appears in the distributions toward large particle sizes. In the meantime, the discharge voltage, electron density, and emission line intensities strongly evolve. Their evolutions can be divided in four separate phases and exhibit unusual distinctive features compared to earlier observations in discharges in which particles were growing. The evolution of the different parameters is explained by a competition between the surface state of the tungsten cathode and the influence of the growing nanoparticles. The differences with sputtering glow discharges and chemically active plasmas suggest that the nanoparticle growth and its influence on discharge parameters is system and material dependent.

Kishor Kumar, K.; Coueedel, L.; Arnas, C. [Laboratoire de Physique des Interactions Ioniques et Moleculaires, CNRS-Aix-Marseille Universite, 13397 Marseille (France)

2013-04-15T23:59:59.000Z

395

Comparison of surface vacuum ultraviolet emissions with resonance level number densities. I. Argon plasmas  

SciTech Connect (OSTI)

Vacuum ultraviolet (VUV) photons emitted from excited atomic states are ubiquitous in material processing plasmas. The highly energetic photons can induce surface damage by driving surface reactions, disordering surface regions, and affecting bonds in the bulk material. In argon plasmas, the VUV emissions are due to the decay of the 1s{sub 4} and 1s{sub 2} principal resonance levels with emission wavelengths of 104.8 and 106.7?nm, respectively. The authors have measured the number densities of atoms in the two resonance levels using both white light optical absorption spectroscopy and radiation-trapping induced changes in the 3p{sup 5}4p?3p{sup 5}4s branching fractions measured via visible/near-infrared optical emission spectroscopy in an argon inductively coupled plasma as a function of both pressure and power. An emission model that takes into account radiation trapping was used to calculate the VUV emission rate. The model results were compared to experimental measurements made with a National Institute of Standards and Technology-calibrated VUV photodiode. The photodiode and model results are in generally good accord and reveal a strong dependence on the neutral gas temperature.

Boffard, John B., E-mail: jboffard@wisc.edu; Lin, Chun C. [Department of Physics, University of Wisconsin, Madison, WI 53706 (United States); Culver, Cody [Materials Science Program, University of Wisconsin, Madison, WI 53706 (United States); Wang, Shicong; Wendt, Amy E. [Department of Electrical and Computer Engineering, University of Wisconsin, Madison, WI 53706 (United States); Radovanov, Svetlana; Persing, Harold [Varian Semiconductor Equipment, Applied Materials Inc., Gloucester, MA 01939 (United States)

2014-03-15T23:59:59.000Z

396

An experimental study of atmospheric pressure dielectric barrier discharge (DBD) in argon  

SciTech Connect (OSTI)

In this paper, experimental results on atmospheric pressure argon dielectric barrier discharge (DBD) have been presented. The discharge was generated using a high voltage (0 to 20 kV) power supply operating at frequency of 10 to 30 kHz and was studied by means of electrical and optical measurements. A homogeneous and steady discharge was observed between the electrodes with gap spacing from 1 mm to 3 mm and with a dielectric barrier of thickness 1.5 mm while argon gas is fed at a controlled flow rate of 2liter per min. The electron temperature (T{sub e}) and electron density (n{sub e}) of the plasma have been determined by means of optical emission spectroscopy. Our results show that the electron density is of the order of 10{sup 16} cm{sup ?3} while the electron temperature is estimated to be ? 1 eV. The homogeneity and non-thermal nature of the discharge were utilized in the investigation of the change in wettabilty of a polymer sample subjected to the treatment by the discharge. Contact angle analysis showed that the discharge was effective in improving the wettability of low density Polyethylene (LDPE) polymer sample after the treatment.

Subedi, D. P. [Department of Natural Sciences, School of Science, Kathmandu University, Dhulikhel (Nepal); Tyata, R. B. [Department of Natural Sciences, School of Science, Kathmandu University, Dhulikhel, Nepal and Department of Electrical, Khwopa College of Engineering, Libali-2, Bhaktapur (Nepal); Shrestha, R. [Department of Natural Sciences, School of Science, Kathmandu University, Dhulikhel, Nepal and Department of Physics, Basu College, Kalighat, Byasi, Bhaktapur (Nepal); Wong, C. S. [Plasma Technology Research Centre, Physics Department, Faculty of Science, University of Malaya, 50603 Kuala Lumpur (Malaysia)

2014-03-05T23:59:59.000Z

397

Numerical study on microwave-sustained argon discharge under atmospheric pressure  

SciTech Connect (OSTI)

A numerical study on microwave sustained argon discharge under atmospheric pressure is reported in this paper. The purpose of this study is to investigate both the process and effects of the conditions of microwave-excited gas discharge under atmospheric pressure, thereby aiding improvements in the design of the discharge system, setting the appropriate working time, and controlling the operating conditions. A 3D model is presented, which includes the physical processes of electromagnetic wave propagation, electron transport, heavy species transport, gas flow, and heat transfer. The results can be obtained by means of the fluid approximation. The maxima of the electron density and gas temperature are 4.96?×?10{sup 18} m{sup ?3} and 2514.8?K, respectively, and the gas pressure remains almost unchanged for typical operating conditions with a gas flow rate of 20 l/min, microwave power of 1000 W, and initial temperature of 473?K. In addition, the conditions (microwave power, gas flow rate, and initial temperature) of discharge are varied to obtain deeper information about the electron density and gas temperature. The results of our numerical study are valid and clearly describe both the physical process and effects of the conditions of microwave-excited argon discharge.

Yang, Y.; Hua, W., E-mail: huaw@scu.edu.cn; Guo, S. Y. [School of Electronics and Information Engineering, Sichuan University, Chengdu 610065 (China)] [School of Electronics and Information Engineering, Sichuan University, Chengdu 610065 (China)

2014-04-15T23:59:59.000Z

398

Transport mechanisms and experimental evidence of positively charged dust particles in an argon plasma  

SciTech Connect (OSTI)

It is well known that dense particle clouds often reside within the steady-state plasma; however, particle transport in the critical post-plasma period has not yet been fully explored. To better understand and characterize particle behavior, charge and transport properties of dust particles in an argon plasma, contained within a Gaseous Electronics Conference (GEC) reference cell, were studied in the steady-state and post-plasma regimes of a 500 mTorr, 25 W argon discharge. Using separate water chillers to control independently the temperatures of the upper and lower electrodes, various temperature gradients were imposed on the plasma and thermophoretic transport of the particle clouds observed for both steady and decaying discharges. Next, using a pulsed rf power supply and a tuned Langmuir probe, the decay times of electrons and ions were measured in the afterglow. Finally, utilizing high-speed video in concert with 10 mW He-Ne laser light, post-plasma particle trajectories were observed for various electric fields and electrode temperatures. Results were then compared to calculations from a net force model that included gravity, the electric field, fluid flow, ion drag, and thermophoresis. It was found that temperature gradients greater than {approximately} 10 C/cm significantly altered particle cloud configurations in steady plasmas, and provided a strong transport mechanism in the afterglow. Electrically, the measured ion density decay time was approximately equal to that of the electrons, consistent with ambipolar diffusion.

Brown, D.A.; Hareland, W.A. [Sandia National Labs., Albuquerque, NM (United States); Collins, S.M. [Univ. of Arizona, Tucson, AZ (United States)

1995-12-31T23:59:59.000Z

399

Argon–oxygen dc magnetron discharge plasma probed with ion acoustic waves  

SciTech Connect (OSTI)

The precise determination of the relative concentration of negative ions is very important for the optimization of magnetron sputtering processes, especially for those undertaken in a multicomponent background produced by adding electronegative gases, such as oxygen, to the discharge. The temporal behavior of an ion acoustic wave excited from a stainless steel grid inside the plasma chamber is used to determine the relative negative ion concentration in the magnetron discharge plasma. The phase velocity of the ion acoustic wave in the presence of negative ions is found to be faster than in a pure argon plasma, and the phase velocity increases with the oxygen partial pressure. Optical emission spectroscopy further confirms the increase in the oxygen negative ion density, along with a decrease in the argon positive ion density under the same discharge conditions. The relative negative ion concentration values measured by ion acoustic waves are compared with those measured by a single Langmuir probe, and a similarity in the results obtained by both techniques is observed.

Saikia, Partha, E-mail: partha.008@gmail.com; Saikia, Bipul Kumar; Goswami, Kalyan Sindhu [Centre of Plasma Physics, Institute for Plasma Research, Nazirakhat, Sonapur, Kamrup, Assam 782 402 (India); Phukan, Arindam [Madhabdev College, Narayanpur, Lakhimpur, Assam 784164 (India)

2014-05-15T23:59:59.000Z

400

Air cooling for Vertex Detectors  

E-Print Network [OSTI]

The vertex detectors are crucial detectors for future linear e+e- colliders since they must give the most accurate location of any outgoing charged particles originating from the interaction point. The DEPFET collaboration is developing a new type of pixel sensors which provide very low noise and high spatial resolution. In order to precisely determine the track and vertex positions, multiple scattering in the detector has to be reduced by minimizing the material in the sensors, cooling, and support structures. A new method of cooling by blowing air over the sensors has been developed and tested. It is applied in the design and construction of the Belle-II detector and may be used in the new generation of vertex detectors for linear colliders.

Arantza Oyanguren

2012-02-28T23:59:59.000Z

Note: This page contains sample records for the topic "argon prototype detector" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

Performances and ageing study of resistive-anodes Micromegas detectors for HL-LHC environment  

E-Print Network [OSTI]

With the tenfold luminosity increase envisaged at the HL-LHC, the background (photons, neutrons, ...) and the event pile-up probability are expected to increase in proportion in the different experiments, especially in the forward regions like, for instance, the muons chambers of the ATLAS detector. Detectors based on the Micromegas principle should be good alternatives for the detector upgrade in the HL-LHC framework because of a good spatial (flux hadrons environment. Several prototypes of 10x10 cm2, with different pitches (0.5 to 2 mm) and different resistive layers have been tested at CERN (pi+@SPS). Several tests have been performed with a telescope at different voltages to assess the performances of the detectors in terms of position resolution and efficiency. The spark behaviour in these conditions has also been evaluated. Resistive coating has been shown to be a successful method to reduce the effect of sparks on the efficiency of micromegas. A good spatial resolution (~80 \\mum) can be reached with a resistive strip coating detector of 1mm pitch and a high efficiency (> 98%) can be achieved with resistive-anode micromegas detector. An X-rays irradiation has been also performed, showing no ageing effect after more than 21 days exposure and an integrated charge of almost 1C.

F. Jeanneau; T. Alexopoulos; D. Attié; M. Boyer; J. Derré; G. Fanourakis; E. Ferrer-Ribas; J. Galán; E. Gazis; T. Geralis; A. Giganon; I. Giomataris; S. Herlant; J. Manjarrés; E. Ntomari; Ph. Schune; M. Titov; G. Tsipolitis

2012-01-09T23:59:59.000Z

402

Observation of two-dimensional compositional ordering of a carbon monoxide and argon monolayer mixture physisorbed on graphite  

SciTech Connect (OSTI)

Commensurate monolayers of a mixture of 70% carbon monoxide and 30% argon on graphite are studied by neutron and low-energy-electron diffraction. A 2 x 2 superstructure due to 3:1 compositional ordering is observed below 25 K. The compositional ordering is most likely due to molecular-axis ordering of carbon monoxide molecules into a pinwheel pattern with argon atoms at the central sites of each pinwheel. Such a pinwheel structure has been predicted by Harris, Mouritsen, and Berlinsky for planar rotors with anisotropic interactions on a triangular lattice with vacancies.

You, H.; Fain, S.C. Jr.; Satija, S.; Passell, L.

1986-01-20T23:59:59.000Z

403

Advanced Scintillator Detector Concept (ASDC): A Concept Paper on the Physics Potential of Water-Based Liquid Scintillator  

E-Print Network [OSTI]

The recent development of Water-based Liquid Scintillator (WbLS), and the concurrent development of high-efficiency and high-precision-timing light sensors, has opened up the possibility for a new kind of large-scale detector capable of a very broad program of physics. The program would include determination of the neutrino mass hierarchy and observation of CP violation with long-baseline neutrinos, searches for proton decay, ultra-precise solar neutrino measurements, geo- and supernova neutrinos including diffuse supernova antineutrinos, and neutrinoless double beta decay. We outline here the basic requirements of the Advanced Scintillation Detector Concept (ASDC), which combines the use of WbLS, doping with a number of potential isotopes for a range of physics goals, high efficiency and ultra-fast timing photosensors, and a deep underground location. We are considering such a detector at the Long Baseline Neutrino Facility (LBNF) far site, where the ASDC could operate in conjunction with the liquid argon tracking detector proposed by the LBNE collaboration. The goal is the deployment of a 30-100 kiloton-scale detector, the basic elements of which are being developed now in experiments such as WATCHMAN, ANNIE, SNO+, and EGADS.

J. R. Alonso; N. Barros; M. Bergevin; A. Bernstein; L. Bignell; E. Blucher; F. Calaprice; J. M. Conrad; F. B. Descamps; M. V. Diwan; D. A. Dwyer; S. T. Dye; A. Elagin; P. Feng; C. Grant; S. Grullon; S. Hans; D. E. Jaffe; S. H. Kettell; J. R. Klein; K. Lande; J. G. Learned; K. B. Luk; J. Maricic; P. Marleau; A. Mastbaum; W. F. McDonough; L. Oberauer; G. D. Orebi Gann; R. Rosero; S. D. Rountree; M. C. Sanchez; M. H. Shaevitz; T. M. Shokair; M. B. Smy; A. Stahl; M. Strait; R. Svoboda; N. Tolich; M. R. Vagins; K. A. van Bibber; B. Viren; R. B. Vogelaar; M. J. Wetstein; L. Winslow; B. Wonsak; E. T. Worcester; M. Wurm; M. Yeh; C. Zhang

2014-10-24T23:59:59.000Z

404

Wave-Energy Company Looks to Test Prototypes in Maine Waters...  

Broader source: Energy.gov (indexed) [DOE]

Wave-Energy Company Looks to Test Prototypes in Maine Waters Wave-Energy Company Looks to Test Prototypes in Maine Waters April 9, 2010 - 4:19pm Addthis Lindsay Gsell Resolute...

405

ATLAS Inner Detector Event Data Model  

E-Print Network [OSTI]

offline/? cvsroot=atlas : InnerDetector/InDetRawEvent/ATLAS Inner Detector Event Data Model F. Akesson 1 , M.J.the Inner Detector of the ATLAS experiment is presented. Di?

Costa, M.J.; ATLAS

2009-01-01T23:59:59.000Z

406

An interferometric and spectroscopic argon arc plasma diagnostic This article has been downloaded from IOPscience. Please scroll down to see the full text article.  

E-Print Network [OSTI]

An interferometric and spectroscopic argon arc plasma diagnostic This article has been downloaded An interferometric and spectroscopic argon arc plasma diagnostic K MusioltS, A Czernichowskit, J ChapelleS and C de diagnostics of an arc plasma, when the halfwidth of the Balmer H, line is measured, there is a certain amount

407

J. Phys. Chem. Solids. Pergamon Press 1966. Vol. 27, pp. 1659-1665. Printed in Great Britain. VACANCIES IN SOLID ARGON  

E-Print Network [OSTI]

. VACANCIES IN SOLID ARGON H. R. GLYDE University of Sussex School of Mathematical and Physical Sciences and entropy of vacancy creation in solid argon are re-evaluated using the two-body force approximation. At the triple point, the resulting vacancy free energy is g, = 1900 -4.0 RTcaljmole vat. This does not agree

Glyde, Henry R.

408

Description of the prototype diagnostic residual gas analyzer for ITER  

SciTech Connect (OSTI)

The diagnostic residual gas analyzer (DRGA) system to be used during ITER tokamak operation is being designed at Oak Ridge National Laboratory to measure fuel ratios (deuterium and tritium), fusion ash (helium), and impurities in the plasma. The eventual purpose of this instrument is for machine protection, basic control, and physics on ITER. Prototyping is ongoing to optimize the hardware setup and measurement capabilities. The DRGA prototype is comprised of a vacuum system and measurement technologies that will overlap to meet ITER measurement requirements. Three technologies included in this diagnostic are a quadrupole mass spectrometer, an ion trap mass spectrometer, and an optical penning gauge that are designed to document relative and absolute gas concentrations.

Younkin, T. R., E-mail: tyounkin@gatech.edu [Fusion and Materials for Nuclear Systems Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6169 (United States); Georgia Institute of Technology, Woodruff School of Mechanical Engineering – Nuclear and Radiological Engineering Program, Atlanta, Georgia 30332 (United States); Biewer, T. M.; Klepper, C. C.; Marcus, C. [Fusion and Materials for Nuclear Systems Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6169 (United States)

2014-11-15T23:59:59.000Z

409

High power density test of PXIE MEBT absorber prototype  

E-Print Network [OSTI]

One of the goals of the PXIE program at Fermilab is to demonstrate the capability to form an arbitrary bunch pattern from an initially CW 162.5 MHz H- bunch train coming out of an RFQ. The bunch-by-bunch selection will take place in the 2.1 MeV Medium Energy Beam Transport (MEBT) by directing the undesired bunches onto an absorber that needs to withstand a beam power of up to 21 kW, focused onto a spot with a ~2 mm rms radius. Two prototypes of the absorber were manufactured from molybdenum alloy TZM and tested with a 28 keV DC electron beam up to the peak surface power density required for PXIE, 17W/mm2. Temperatures and flow parameters were measured and compared to analysis. This paper describes the absorber prototypes and key testing results.

Shemyakin, A

2015-01-01T23:59:59.000Z

410

Modeling the imaging performance of prototype organic x-ray imagers  

SciTech Connect (OSTI)

A unified Monte Carlo and cascaded systems model for the simulation of active-matrix flat-panel imagers is presented. With few input parameters, the model simulated the imaging performance of previously measured flat-panel imagers with reasonable accuracy. The model is used to predict the properties of conceptual flat-panel imagers based on organic semiconductors on plastic substrates. The model suggests that significant improvements in resolution and detective quantum efficiency could be achieved by operating such a detector in a back-side illuminated configuration, or by employing two imaging arrays arranged face-to-face. The effect of semiconductor properties on the conceptual imagers is investigated. According to the model, a photodiode quantum efficiency of 25% and dark current of less than 100 pA mm{sup -2} would be satisfactory for a prototype imager, while a competitive imager would require a photodiode quantum efficiency of 40-50% with a dark current of less than 10 pA mm{sup -2} to be quantum limited over the radiographic exposure range.

Blakesley, J. C.; Speller, R. [Department of Medical Physics and Bioengineering, University College London, London WC1E 6BT, United Kingdom and Department of Physics, University of Cambridge, Cambridge CB3 OHE (United Kingdom); Department of Medical Physics and Bioengineering, University College London, London WC1E 6BT (United Kingdom)

2008-01-15T23:59:59.000Z

411

Hubble Space Telescope ACS mosaic of the prototypical starburst galaxy M82  

E-Print Network [OSTI]

In March 2006, the Hubble Heritage Team obtained a large four-filter (B, V, I, and H-alpha) six-point mosaic dataset of the prototypical starburst galaxy NGC 3034 (M82), with the Advanced Camera for Surveys (ACS) onboard the Hubble Space Telescope (HST). The resulting color composite Heritage image was released in April 2006, to celebrate Hubble's 16th anniversary. Cycle 15 HST proposers were encouraged to submit General Observer and Archival Research proposals to complement or analyze this unique dataset. Since our M82 mosaics represent a significant investment of expert processing beyond the standard archival products, we will also release our drizzle combined FITS data as a High Level Science Product via the Multimission Archive at STScI (MAST) on December 31, 2006. This paper documents the key aspects of the observing program and image processing: calibration, image registration and combination (drizzling), and the rejection of cosmic rays and detector artifacts. Our processed FITS mosaics and related information can be downloaded from http://archive.stsci.edu/prepds/m82/

M. Mutchler; H. E. Bond; C. A. Christian; L. M. Frattare; F. Hamilton; W. Januszewski; Z. G. Levay; M. Mountain; K. S. Noll; P. Royle; J. S. Gallagher; P. Puxley

2006-12-19T23:59:59.000Z

412

Hubble Space Telescope ACS mosaic of the prototypical starburst galaxy M82  

E-Print Network [OSTI]

In March 2006, the Hubble Heritage Team obtained a large four-filter (B, V, I, and H-alpha) six-point mosaic dataset of the prototypical starburst galaxy NGC 3034 (M82), with the Advanced Camera for Surveys (ACS) onboard the Hubble Space Telescope (HST). The resulting color composite Heritage image was released in April 2006, to celebrate Hubble's 16th anniversary. Cycle 15 HST proposers were encouraged to submit General Observer and Archival Research proposals to complement or analyze this unique dataset. Since our M82 mosaics represent a significant investment of expert processing beyond the standard archival products, we will also release our drizzle combined FITS data as a High Level Science Product via the Multimission Archive at STScI (MAST) on December 31, 2006. This paper documents the key aspects of the observing program and image processing: calibration, image registration and combination (drizzling), and the rejection of cosmic rays and detector artifacts. Our processed FITS mosaics and related inf...

Mutchler, M; Christian, C A; Frattare, L M; Hamilton, F; Januszewski, W; Levay, Z G; Mountain, M; Noll, K S; Royle, P; Gallagher, J S; Puxley, P

2006-01-01T23:59:59.000Z

413

Acquisition System and Detector Interface for Power Pulsed Detectors  

E-Print Network [OSTI]

A common DAQ system is being developed within the CALICE collaboration. It provides a flexible and scalable architecture based on giga-ethernet and 8b/10b serial links in order to transmit either slow control data, fast signals or read out data. A detector interface (DIF) is used to connect detectors to the DAQ system based on a single firmware shared among the collaboration but targeted on various physical implementations. The DIF allows to build, store and queue packets of data as well as to control the detectors providing USB and serial link connectivity. The overall architecture is foreseen to manage several hundreds of thousands channels.

Cornat, R

2015-01-01T23:59:59.000Z

414

Field Testing of Pre-Production Prototype Residential Heat Pump Water Heaters  

Broader source: Energy.gov [DOE]

Provides and overview of field testing of 18 pre-production prototype residential heat pump water heaters

415

BNCP prototype detonator studies using a semiconductor bridge initiator  

SciTech Connect (OSTI)

We report on experiments with prototype BNCP detonators incorporating a semiconductor bridge, SCB. We tested two device designs; one for DoD and one for DOE applications. We report tests with the DoD detonator using different firing conditions and two different grain sizes of BNCP. The DOE detonator utilized a 50 {mu}F CDU firing set with a 24 V all-fire condition.

Fyfe, D.W.; Fronabarger, J.W. [Pacific Scientific Co., Avondale-Goodyear, AZ (United States). Energy Dynamics Div.; Bickes, R.W. Jr. [Sandia National Labs., Albuquerque, NM (United States)

1994-06-01T23:59:59.000Z

416

Development and Demonstration of a Prototype Omnivorous Engine | Department  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-UpHeat Pump Models |Conduct, Parent Companya new high capacityof Energy Prototype

417

A Comparison of Two Prototype Laser-Optical Firing Systems  

SciTech Connect (OSTI)

The design and characterization of small, ruggedized laser-optical subsystems is required for the continued development of robust laser-optical firing systems. Typically, these subsystems must be capable of generating the needed laser optical energy, delivering that energy via fiber-optical cables while taking up occupying a volume as small as possible. A novel beam splitting and fiber injection scheme has been proposed which utilizes two diffractive optical components. These components were utilized to reduce the volume of a previously designed system. A laser-optical prototype system was assembled and tested which utilized this beam splitting and fiber injection scheme along other modifications to the laser module and the power supply. This prototype was based on earlier designs that utilized environmentally proven opto-mechanical sub-assemblies. The system was tested to characterize the laser performance, the splitter-coupler transmission efficiency, channel-to-channel energy balance and fiber interchangeability. The results obtained for this design will be compared to the performance of a prototype system based on a more traditional beam splitting and fiber injection scheme. The traditional design utilized partially reflecting mirrors for beam splitting and plano-convex lenses for fiber injection. These results will be discussed as will their ultimate impact on future designs and packaging strategies.

Gregg L. Morelli; Michelle R. Bright

2008-08-11T23:59:59.000Z

418

1 Imbedded Heat Pipe Prototype Modelling, Design, and Construction for Particle Ac-  

E-Print Network [OSTI]

1 Imbedded Heat Pipe Prototype Modelling, Design, and Construction for Particle Ac- celerator for predicting heat pipe performance has been generated and a design based on the results of that model has been implemented. A prototype heat pipe is under construction to test the validity of the model. The prototype

Cinabro, David

419

Detectors and Sensors | ornl.gov  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Detectors and Sensors SHARE Detectors and Sensors 201303163 Extreme Filter for Low-Output Thermocouples in High EMI Environments 201303179 Internal Tube Inspection System...

420

Design of a re-configurable test stand for a multi degree of freedom compliant robot prototype  

E-Print Network [OSTI]

A test stand was designed and constructed to compress a compliant robot prototype, while measuring the force applied and the displacement of the prototype's end. The prototype is a five degree of freedom, compliant device, ...

Klenk, Daniel E

2009-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "argon prototype detector" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

The Ring Imaging Cherenkov detector (RICH) of the AMS experiment  

E-Print Network [OSTI]

The Alpha Magnetic Spectrometer (AMS) experiment to be installed on the International Space Station (ISS) will be equipped with a proximity focusing Ring Imaging Cherenkov (RICH) detector for measuring the electric charge and velocity of the charged cosmic particles. A RICH prototype consisting of 96 photomultiplier units, including a piece of the conical reflector, was built and its performance evaluated with ion beam data. Preliminary results of the in-beam tests performed with ion fragments resulting from collisions of a 158 GeV/c/nuc primary beam of Indium ions (CERN SPS) on a Pb target are reported. The collected data included tests to the final front-end electronics and to different aerogel radiators. Cherenkov rings for a large range of charged nuclei and with reflected photons were observed. The data analysis confirms the design goals. Charge separation up to Fe and velocity resolution of the order of 0.1% for singly charged particles are obtained.

F. Barao; M. Aguilar Benitez; J. Alcaraz; L. Arruda; A. Barrau; G. Barreira; E. Belmont; J. Berdugo; M. Brinet; M. Buenerd; D. Casadei; J. Casaus; E. Cortina; C. Delgado; C. Diaz; L. Derome; L. Eraud; R. J. Garcia-Lopez; L. Gallin-Martel; F. Giovacchini; P. Goncalves; E. Lanciotti; G. Laurenti; A. Malinine; C. Mana; J. Marin; G. Martinez; A. Menchaca-Rocha; M. Molla; C. Palomares; M. Panniello; R. Pereira; M. Pimenta; K. Protasov; E. Sanchez; E-S. Seo; N. Sevilla; A. Torrento; M. Vargas-Trevino; O. Veziant

2006-03-31T23:59:59.000Z

422

Solid state neutron detector array  

DOE Patents [OSTI]

A neutron detector array is capable of measuring a wide range of neutron fluxes. The array includes multiple semiconductor neutron detectors. Each detector has a semiconductor active region that is resistant to radiation damage. In one embodiment, the array preferably has a relatively small size, making it possible to place the array in confined locations. The ability of the array to detect a wide range of neutron fluxes is highly advantageous for many applications such as detecting neutron flux during start up, ramp up and full power of nuclear reactors. 7 figs.

Seidel, J.G.; Ruddy, F.H.; Brandt, C.D.; Dulloo, A.R.; Lott, R.G.; Sirianni, E.; Wilson, R.O.

1999-08-17T23:59:59.000Z

423

Solid state neutron detector array  

DOE Patents [OSTI]

A neutron detector array is capable of measuring a wide range of neutron fluxes. The array includes multiple semiconductor neutron detectors. Each detector has a semiconductor active region that is resistant to radiation damage. In one embodiment, the array preferably has a relatively small size, making it possible to place the array in confined locations. The ability of the array to detect a wide range of neutron fluxes is highly advantageous for many applications such as detecting neutron flux during start up, ramp up and full power of nuclear reactors.

Seidel, John G. (Pittsburgh, PA); Ruddy, Frank H. (Monroeville, PA); Brandt, Charles D. (Mount Lebanon, PA); Dulloo, Abdul R. (Pittsburgh, PA); Lott, Randy G. (Pittsburgh, PA); Sirianni, Ernest (Monroeville, PA); Wilson, Randall O. (Greensburg, PA)

1999-01-01T23:59:59.000Z

424

ATLAS Forward Detectors and Physics  

E-Print Network [OSTI]

In this communication I describe the ATLAS forward physics program and the detectors, LUCID, ZDC and ALFA that have been designed to meet this experimental challenge. In addition to their primary role in the determination of ATLAS luminosity these detectors - in conjunction with the main ATLAS detector - will be used to study soft QCD and diffractive physics in the initial low luminosity phase of ATLAS running. Finally, I will briefly describe the ATLAS Forward Proton (AFP) project that currently represents the future of the ATLAS forward physics program.

N. Soni

2010-06-28T23:59:59.000Z

425

Neutrino Physics with Thermal Detectors  

SciTech Connect (OSTI)

The investigation of fundamental neutrino properties like its mass and its nature calls for the design of a new generation of experiments. High sensitivity, high energy resolution, and versatility together with the possibility of a simple multiplexing scheme are the key features of future detectors for these experiments. Thermal detectors can combine all these features. This paper reviews the status and the perspectives for what concerns the application of this type of detectors to neutrino physics, focusing on direct neutrino mass measurements and neutrinoless double beta decay searches.

Nucciotti, A. [Dipartimento di Fisica, Universita di Milano Bicocca and INFN Sezione di Milano-Bicocca Piazza della Scienza, 3, 20126 Milano (Italy)

2009-11-09T23:59:59.000Z

426

Seal system with integral detector  

DOE Patents [OSTI]

A seal system is disclosed for materials where security is of the essence, such as nuclear materials. The seal is tamper-indicating, indicates changes in environmental conditions that evidence attempts to bypass the seal, is unique and cost effective. The seal system is comprised of a seal where an optical signal is transmitted through a loop, with a detector to read said signal, and one or more additional detectors designed to detect environmental changes, these detectors being operatively associated with the seal so that detection of a break in the optical signal or detection of environmental changes will cause an observable change in the seal.

Fiarman, S.

1982-08-12T23:59:59.000Z

427

Seal system with integral detector  

DOE Patents [OSTI]

There is disclosed a seal system for materials where security is of the essence, such as nuclear materials, which is tamper-indicating, which indicates changes in environmental conditions that evidence attempts to by-pass the seal, which is unique and cost effective, said seal system comprised of a seal where an optical signal is transmitted through a loop, with a detector to read said signal, and one or more additional detectors designed to detect environmental changes, these detectors being operatively associated with the seal so that detection of a break in the optical signal or detection of environmental changes will cause an observable change in the seal.

Fiarman, Sidney (Port Jefferson, NY)

1985-01-01T23:59:59.000Z

428

Optical transcutaneous bilirubin detector  

DOE Patents [OSTI]

This invention consists of a transcutaneous bilirubin detector comprising a source of light having spectral components absorbable and not absorbable by bilirubin, a handle assembly, electronic circuitry and a fiber optic bundle connecting the assembly to the light source and circuitry. Inside the assembly is a prism that receives the light from one end of the fiber optic bundle and directs it onto the skin and directs the reflected light back into the bundle. The other end of the bundle is trifucated, with one end going to the light source and the other two ends going to circuitry that determines how much light of each kind has been reflected. A relatively greater amount absorbed by the skin from the portion of the spectrum absorbable by bilirubin may indicate the presence of the illness. Preferably, two measurements are made, one on the kneecap and one on the forehead, and compared to determine the presence of bilirubin. To reduce the impact of light absorption by hemoglobin in the blood carried by the skin, pressure is applied with a plunger and spring in the handle assembly, the pressure limited by points of a button slidably carried in the assembly that are perceived by touch when the pressure applied is sufficient.

Kronberg, J.W.

1991-03-04T23:59:59.000Z

429

Microwave hematoma detector  

DOE Patents [OSTI]

The Microwave Hematoma Detector is a non-invasive device designed to detect and localize blood pooling and clots near the outer surface of the body. While being geared towards finding sub-dural and epi-dural hematomas, the device can be used to detect blood pooling anywhere near the surface of the body. Modified versions of the device can also detect pneumothorax, organ hemorrhage, atherosclerotic plaque in the carotid arteries, evaluate perfusion (blood flow) at or near the body surface, body tissue damage at or near the surface (especially for burn assessment) and be used in a number of NDE applications. The device is based on low power pulsed microwave technology combined with a specialized antenna, signal processing/recognition algorithms and a disposable cap worn by the patient which will facilitate accurate mapping of the brain and proper function of the instrument. The invention may be used for rapid, non-invasive detection of sub-dural or epi-dural hematoma in human or animal patients, detection of hemorrhage within approximately 5 cm of the outer surface anywhere on a patient's body.

Haddad, Waleed S. (Dublin, CA); Trebes, James E. (Livermore, CA); Matthews, Dennis L. (Moss Beach, CA)

2001-01-01T23:59:59.000Z

430

Report on the Depth Requirements for a Massive Detector at Homestake  

SciTech Connect (OSTI)

This report provides the technical justification for locating a large detector underground in a US based Deep Underground Science and Engineering Laboratory. A large detector with a fiducial mass greater than 100 kTon will most likely be a multipurpose facility. The main physics justification for such a device is detection of accelerator generated neutrinos, nucleon decay, and natural sources of neutrinos such as solar, atmospheric and supernova neutrinos. The requirement on the depth of this detector will be guided by the rate of signals from these sources and the rate of backgrounds from cosmic rays over a very wide range of energies (from solar neutrino energies of 5 MeV to high energies in the range of tens of GeV). For the present report, we have examined the depth requirement for a large water Cherenkov detector and a liquid argon time projection chamber. There has been extensive previous experience with underground water Cherenkov detectors such as IMB, Kamioka, and most recently, Super-Kamiokande which has a fiducial mass of 22 kTon and a total mass of 50 kTon at a depth of 2700 meters-water-equivalent. Projections for signal and background capability for a larger and deeper (or shallower) detectors of this type can be scaled from these previous detectors. The liquid argon time projection chamber has the advantage of being a very fine-grained tracking detector, which provides enhanced capability for background rejection. In the current work we have taken the approach that the depth should be sufficient to suppress the cosmogenic background below predicted signal rates for either of the above two technologies. Nevertheless, it is also clear that the underground facility that we are examining must have a long life and will most likely be used either for future novel uses of the currently planned detectors or new technologies. Therefore the depth requirement also needs to be made on the basis of sound judgment regarding possible future use. In particular, the depth should be sufficient for any possible future use of these cavities or the level which will be developed for these large structures. Along with these physics justifications there are practical issues regarding the existing infrastructure at Homestake and also the stress characteristics of the Homestake rock formations. In this report we will examine the various depth choices at Homestake from the point of view of the particle and nuclear physics signatures of interest. We also have sufficient information about the existing infrastructure and the rock characteristics to narrow the choice of levels for the development of large cavities with long lifetimes. We make general remarks on desirable ground conditions for such large cavities and then make recommendations on how to start examining these levels to make a final choice. In the appendix we have outlined the initial requirements for the detectors. These requirements will undergo refinement during the course of the design. Finally, we strongly recommend that the geotechnical studies be commenced at the 4850 ft level, which we find to be the most suitable, in a timely manner.

Bernstein,A.; Blucher, E.; Cline, D. B.; Diwan, M. V.; Fleming, b.; Kadel, R.; Kearns, E.; Klein, J.; Lande, K.; Lanni, F.; Lissauer, D.; McKeown, R.; Morse, W.; Radeika, R.; Scholberg, K.; Smy, M.; Sobel, H.; Sullivan, G.; Svoboda, R.; Vagins, M.; Walter, C.; Zwaska, R.

2008-12-22T23:59:59.000Z

431

Report on the Depth Requirements for a Massive Detector at Homestake  

SciTech Connect (OSTI)

This report provides the technical justification for locating a large detector underground in a US based Deep Underground Science and Engineering Laboratory. A large detector with a fiducial mass greater than 100 kTon will most likely be a multipurpose facility. The main physics justification for such a device is detection of accelerator generated neutrinos, nucleon decay, and natural sources of neutrinos such as solar, atmospheric and supernova neutrinos. The requirement on the depth of this detector will be guided by the rate of signals from these sources and the rate of backgrounds from cosmic rays over a very wide range of energies (from solar neutrino energies of 5 MeV to high energies in the range of hundreds of GeV). For the present report, we have examined the depth requirement for a large water Cherenkov detector and a liquid argon time projection chamber. There has been extensive previous experience with underground water Cherenkov detectors such as IMB, Kamioka, and most recently, Super-Kamiokande which has a fiducial mass of 22 kTon and a total mass of 50 kTon at a depth of 2700 meters-water-equivalent in a mountain. Projections for signal and background capability for a larger and deeper(or shallower) detectors of this type can be scaled from these previous detectors. The liquid argon time projection chamber has the advantage of being a very fine-grained tracking detector, which should provide enhanced capability for background rejection. We have based background rejection on reasonable estimates of track and energy resolution, and in some cases scaled background rates from measurements in water. In the current work we have taken the approach that the depth should be sufficient to suppress the cosmogenic background below predicted signal rates for either of the above two technologies. Nevertheless, it is also clear that the underground facility that we are examining must have a long life and will most likely be used either for future novel uses of the currently planned detectors or new technologies. Therefore the depth requirement also needs to be made on the basis of sound judgment regarding possible future use. In particular, the depth should be sufficient for any possible future use of these cavities or the level which will be developed for these large structures.Along with these physics justifications there are practical issues regarding the existing infrastructure at Homestake and also the stress characteristics of the Homestake rock formations. In this report we will examine the various depth choices at Homestake from the point of view of the particle and nuclear physics signatures of interest. We also have sufficient information about the existing infrastructure and the rock characteristics to narrow the choice of levels for the development of large cavities with long lifetimes. We make general remarks on desirable ground conditions for such large cavities and then make recommendations on how to start examining these levels to make a final choice. In the appendix we have outlined the initial requirements for the detectors. These requirements will undergo refinement during the course of the design. Finally, we strongly recommend that the geotechnical studies be commenced at the 4850 ft level, which we find to be the most suitable, in a timely manner.

Kadel, Richard W.; Bernstein, Adam; Blucher, Edward; Cline, David B.; Diwan, Milind V.; Fleming, Bonnie; Kearns, Edward; Klein, Joshua; Lande, Kenneth; Lanni, Francesco; Lissauer, David; McKeown, Robert; Morse, William; Rameika, Regina; Scholberg, Kate; Smy, Michael; Sobel, Henry; Sullivan, Gregory; Svoboda, Robert; Vagins, Mark; Walter, Christopher; Zwaska, Robert

2008-12-23T23:59:59.000Z

432

A LOW-COST GPR GAS PIPE & LEAK DETECTOR  

SciTech Connect (OSTI)

A light-weight, easy to use ground penetrating radar (GPR) system for tracking metal/non-metal pipes has been developed. A pre-production prototype instrument has been developed whose production cost and ease of use should fit important market niches. It is a portable tool which is swept back and forth like a metal detector and which indicates when it goes over a target (metal, plastic, concrete, etc.) and how deep it is. The innovation of real time target detection frees the user from having to interpret geophysical data and instead presents targets as dots on the screen. Target depth is also interpreted automatically, relieving the user of having to do migration analysis. In this way the user can simply walk around looking for targets and, by ''connecting the dots'' on the GPS screen, locate and follow pipes in real time. This is the first tool known to locate metal and non-metal pipes in real time and map their location. This prototype design is similar to a metal detector one might use at the beach since it involves sliding a lightweight antenna back and forth over the ground surface. The antenna is affixed to the end of an extension that is either clipped to or held by the user. This allows him to walk around in any direction, either looking for or following pipes with the antenna location being constantly recorded by the positioning system. Once a target appears on the screen, the user can locate by swinging the unit to align the cursor over the dot. Leak detection was also a central part of this project, and although much effort was invested into its development, conclusive results are not available at the time of the writing of this document. Details of the efforts that were made as a part of this cooperative agreement are presented.

David Cist; Alan Schutz

2005-03-30T23:59:59.000Z

433

Conduction Effect of Thermal Radiation in a Metal Shield Pipe in a Cryostat for a Cryogenic Interferometric Gravitational Wave Detector  

E-Print Network [OSTI]

A large heat load caused by thermal radiation through a metal shield pipe was observed in a cooling test of a cryostat for a prototype of a cryogenic interferometric gravitational wave detector. The heat load was approximately 1000 times larger than the value calculated by the Stefan-Boltzmann law. We studied this phenomenon by simulation and experiment and found that it was caused by the conduction of thermal radiation in a metal shield pipe.

Takayuki Tomaru; Masao Tokunari; Kazuaki Kuroda; Takashi Uchiyama; Akira Okutomi; Masatake Ohashi; Hiroyuki Kirihara; Nobuhiro Kimura; Yoshio Saito; Nobuaki Sato; Takakazu Shintomi; Toshikazu Suzuki; Tomiyoshi Haruyama; Shinji Miyoki; Kazuhiro Yamamoto; Akira Yamamoto

2007-11-06T23:59:59.000Z

434

Measurement and Modeling of Blocking Contacts for Cadmium Telluride Gamma Ray Detectors  

SciTech Connect (OSTI)

Gamma ray detectors are important in national security applications, medicine, and astronomy. Semiconductor materials with high density and atomic number, such as Cadmium Telluride (CdTe), offer a small device footprint, but their performance is limited by noise at room temperature; however, improved device design can decrease detector noise by reducing leakage current. This thesis characterizes and models two unique Schottky devices: one with an argon ion sputter etch before Schottky contact deposition and one without. Analysis of current versus voltage characteristics shows that thermionic emission alone does not describe these devices. This analysis points to reverse bias generation current or leakage through an inhomogeneous barrier. Modeling the devices in reverse bias with thermionic field emission and a leaky Schottky barrier yields good agreement with measurements. Also numerical modeling with a finite-element physics-based simulator suggests that reverse bias current is a combination of thermionic emission and generation. This thesis proposes further experiments to determine the correct model for reverse bias conduction. Understanding conduction mechanisms in these devices will help develop more reproducible contacts, reduce leakage current, and ultimately improve detector performance.

Beck, P R

2010-01-07T23:59:59.000Z

435

Energy of the quasi-free electron in argon, krypton and xenon Xianbo Shi a,b  

E-Print Network [OSTI]

Energy of the quasi-free electron in argon, krypton and xenon Xianbo Shi a,b , Luxi Li a,b , C. M ionization of the dopant, and (iii) the kinetic energy of the quasi-free electron. The polarization terms are determined by a standard statistical mechanical treatment. However, the kinetic energy of the quasi-free

Findley, Gary L.

436

One and two photon optogalvanic spectroscopy of argon and neon for the wavelength calibration in the near infrared  

E-Print Network [OSTI]

in the near infrared Zhen Tang *, Richard B. Miles Department of Mechanical and Aerospace Engineering The one photon and two photon optogalvanic spectra of argon and neon have been investigated in the near infrared region between 735 and 781 nm. About 35 transitions have been recorded by illuminating a hollow

Miles, Richard

437

IN-SITU TRITIUM BETA DETECTOR  

SciTech Connect (OSTI)

The objectives of this three-phase project were to design, develop, and demonstrate a monitoring system capable of detecting and quantifying tritium in situ in ground and surface waters, and in water from effluent lines prior to discharge into public waterways. The tritium detection system design is based on measurement of the low energy beta radiation from the radioactive decay of tritium using a special form of scintillating optical fiber directly in contact with the water to be measured. The system consists of the immersible sensor module containing the optical fiber, and an electronics package, connected by an umbilical cable. The system can be permanently installed for routine water monitoring in wells or process or effluent lines, or can be moved from one location to another for survey use. The electronics will read out tritium activity directly in units of pico Curies per liter, with straightforward calibration. In Phase 1 of the project, we characterized the sensitivity of fluor-doped plastic optical fiber to tritium beta radiation. In addition, we characterized the performance of photomultiplier tubes needed for the system. In parallel with this work, we defined the functional requirements, target specifications, and system configuration for an in situ tritium beta detector that would use the fluor-doped fibers as primary sensors of tritium concentration in water. The major conclusions from the characterization work are: A polystyrene optical fiber with fluor dopant concentration of 2% gave best performance. This fiber had the highest dopant concentration of any fibers tested. Stability may be a problem. The fibers exposed to a 22-day soak in 120 F water experienced a 10x reduction in sensitivity. It is not known whether this was due to the build up of a deposit (a potentially reversible effect) or an irreversible process such as leaching of the scintillating dye. Based on the results achieved, it is premature to initiate Phase 2 and commit to a prototype design for construction and test. Significant improvements must be made in fluor-doped fiber performance in order to use the method for in situ monitoring to verify compliance with current EPA drinking water standards. Additional Phase 1 fiber development work should be performed to increase the fluor dopant concentration above 2% until the self-absorption limit is observed. Continued fiber optimization work is expected to improve the sensitivity limits, and will enable application of the detector to verify compliance with the US EPA drinking water standard of 20,000 pico Curies per liter. However, if the need for monitoring higher levels of tritium in water at concentrations greater than 200,000 pico Curies per liter is justified, then prototype development and testing could proceed either as a Phase 2 stand-alone effort or in parallel with continued Phase 1 development work.

J.W. Berthold; L.A. Jeffers

1998-04-15T23:59:59.000Z

438

Physics with the MAC detector  

SciTech Connect (OSTI)

New results, obtained during the previous year at the PEP colliding beam rings with the MAC detector at a center of mass energy of 29 GeV, are presented.

Ford, W.T.; Read, A.L. Jr., Smith, J. G.

1982-10-01T23:59:59.000Z

439

MOON for spectroscopic studies of double beta decays and the present status of the MOON-1 prototype detector  

E-Print Network [OSTI]

to be studied by neutrinoless double beta decay is of the order of 0.1 ~ 0.02 eV if the neutrino is a Majorana experiment with a few ton of 100 Mo. It aims at spectroscopic studies of the neutrinoless double beta decays

Washington at Seattle, University of

440

Study of relaxation kinetics in argon afterglow by the breakdown time delay measurements  

SciTech Connect (OSTI)

In this paper the afterglow kinetics in argon is studied by the breakdown time delay measurements as a function of relaxation time t{sub d}({tau}) ('memory curve'). Measurements were carried out at the pressure of 1.33 mbar in a gas tube with gold-plated copper cathode and approximate and exact numerical models are developed to follow metastable and charged particle decay. It was found that the early afterglow kinetics is governed by the charged particle decay up to hundreds of milliseconds, extending from ambipolar to the free diffusion limit. Quenching processes reduce the effective lifetime of metastable states several orders of magnitude below that relevant for the time scale of the observations if realistic abundances and processes are included in the model. Nitrogen atoms originating from impurities and recombining on the cathode surface can determine the breakdown time delay down to that defined by the level of cosmic rays and natural radioactivity.

Markovic, V.Lj.; Gocic, S.R.; Stamenkovic, S.N.; Petrovic, Z.Lj. [Department of Physics, University of Nis, P.O. BOX 224, 18001 Nis (Serbia and Montenegro); Institute of Physics, P.O. BOX 68, Belgrade (Serbia and Montenegro)

2005-07-15T23:59:59.000Z

Note: This page contains sample records for the topic "argon prototype detector" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

Operating characteristics of a hydrogen-argon plasma torch for supersonic combustion applications  

SciTech Connect (OSTI)

The residence time of the combustible mixture in the combustion chamber of a scramjet engine is much less than the time normally required for complete combustion. Hydrogen and hydrocarbon fuels require an ignition source under conditions typically found in a scramjet combustor. Analytical studies indicate that the presence of hydrogen atoms should greatly reduce the ignition delay in this environment. Because hydrogen plasmas are prolific sources of hydrogen atoms, a low-power, uncooled hydrogen plasma torch has been built and tested to evaluate its potential as a possible flame holder for supersonic combustion. The torch was found to be unstable when operated on pure hydrogen; however, stable operation could be obtained by using argon as a body gas and mixing in the desired amount of hydrogen. The stability limits of the torch are delineated and its electrical and thermal behavior documented. An average torch thermal efficiency of around 88 percent is demonstrated. 10 references.

Barbi, E.; Mahan, J.R.; O'brien, W.F.; Wagner, T.C.

1989-04-01T23:59:59.000Z

442

Striated microdischarges in an asymmetric barrier discharge in argon at atmospheric pressure  

SciTech Connect (OSTI)

The investigation of striated microdischarges in barrier discharges in argon at atmospheric pressure is reported. Microdischarges were investigated by means of electrical measurements correlated with intensified CCD camera imaging. The scaling law theory known from low-pressure glow discharge diagnostics was applied in order to describe and explain this phenomenon. The investigated microdischarge is characterized as a transient atmospheric-pressure glow discharge with a stratified column. It can be described by similarity parameters i/r{approx_equal}0.13 A/cm, pr{approx_equal}5 Torr cm, and 3<{lambda}/r<5 with the current i, pressure p, interval of subsequent striations {lambda}, and radius of the plasma channel r. An attempt to describe the mechanism of creation of a striated structure is given, based on an established model of the spatial electron relaxation.

Hoder, Tomas; Loffhagen, Detlef; Wilke, Christian; Grosch, Helge; Schaefer, Jan; Weltmann, Klaus-Dieter; Brandenburg, Ronny [Leibniz Institute for Plasma Science and Technology, Felix-Hausdorff-Str. 2, D-17489 Greifswald (Germany)

2011-10-15T23:59:59.000Z

443

Collection efficiency of photoelectrons injected into near- and supercritical argon gas  

SciTech Connect (OSTI)

Injection of photoelectrons into gaseous or liquid dielectrics is a widely used technique to produce cold plasmas in weakly ionized systems for investigating the transport properties of electrons. We report measurements of the collection efficiency of photoelectrons injected into dense argon gas for T= 152.7 K, close to the critical temperature T{sub c} Almost-Equal-To 150.9 K, and for T= 200.0 K. The high-field data agree with the Young-Bradbury model and with previous measurements below T{sub c} and at an intermediate temperature above T{sub c}. The effective, density-dependent electron-atom momentum transfer scattering cross section can be deduced. However, the weak-field data near T{sub c} show large deviations from the theoretical model. We show that the electron behavior at weak field is influenced by electrostriction effects that are only important near the critical point.

Borghesani, A. F. [CNISM-Unit, Department of Physics and Astronomy, University of Padua, via F. Marzolo 8, I-35131 Padua (Italy); Lamp, P. [Max-Planck-Institut fuer Physik u. Astrophysik, Munich (Germany)

2013-01-21T23:59:59.000Z

444

Functionalization of carbon nanotubes by argon plasma-assisted ultraviolet grafting  

SciTech Connect (OSTI)

We have demonstrated the functionalization of single-wall carbon nanotubes (SWNTs) by argon (Ar) plasma-assisted ultraviolet (UV) grafting of 1-vinylimidazole (VZ). The Ar plasma treatment generates defect sites at the tube ends and sidewalls, which act as the active sites for the subsequent UV grafting of VZ monomer. Atomic force microscopy analyses indicate that the original nanotube bundles exfoliate to individual tubes after the VZ grafting. By control of the deposited energy of Ar plasma treatment (200 W) and treatment time (5 min), no visible chopping of the functionalized SWNT was observed. This method may be extended to other vinyl monomers and offers another diverse way of sidewall functionalization of SWNT.

Yan, Y.H.; Chan-Park, M.B.; Zhou, Q.; Li, C.M.; Yue, C.Y. [School of Mechanical and Aerospace Engineering and School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore 639798 (Singapore); School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore 639798 (Singapore); School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore 639798 (Singapore)

2005-11-21T23:59:59.000Z

445

Energy spectrum of argon ions emitted from Filippov type Sahand plasma focus  

SciTech Connect (OSTI)

The energy and flux of the argon ions produced in Sahand plasma focus have been measured by employing a well-designed Faraday cup. The secondary electron emission effects on the ion signals are simulated and the dimensions of Faraday cup are optimized to minimize these effects. The measured ion energy spectrum is corrected for the ion energy loss and charge exchange in the background gas. The effects of the capacitor bank voltage and working gas pressure on the ion energy spectrum are also investigated. It has been shown that the emitted ion number per energy increases as the capacitor bank voltage increases. Decreasing the working gas pressure leads to the increase in the number of emitted ion per energy.

Mohammadnejad, M.; Pestehe, S. J.; Mohammadi, M. A. [Department of Atomic and Molecular Physics, Faculty of Physics, University of Tabriz, Postal Code 5166614766, Tabriz (Iran, Islamic Republic of) [Department of Atomic and Molecular Physics, Faculty of Physics, University of Tabriz, Postal Code 5166614766, Tabriz (Iran, Islamic Republic of); Research Institute for Applied Physics and Astronomy, University of Tabriz, Tabriz (Iran, Islamic Republic of)

2013-07-15T23:59:59.000Z

446

Neutron detectors comprising boron powder  

SciTech Connect (OSTI)

High-efficiency neutron detector substrate assemblies comprising a first conductive substrate, wherein a first side of the substrate is in direct contact with a first layer of a powder material comprising .sup.10boron, .sup.10boron carbide or combinations thereof, and wherein a conductive material is in proximity to the first layer of powder material; and processes of making said neutron detector substrate assemblies.

Wang, Zhehui; Morris, Christopher; Bacon, Jeffrey Darnell; Makela, Mark F; Spaulding, Randy Jay

2013-05-21T23:59:59.000Z

447

Measurement of Scintillation and Ionization Yield and Scintillation Pulse Shape from Nuclear Recoils in Liquid Argon  

E-Print Network [OSTI]

We have measured the scintillation and ionization yield of recoiling nuclei in liquid argon as a function of applied electric field by exposing a dual-phase Liquid Argon Time Projection Chamber (LAr-TPC) to a low energy pulsed narrowband neutron beam produced at the Notre Dame Institute for Structure and Nuclear Astrophysics. Liquid scintillation counters were arranged to detect and identify neutrons scattered in the TPC and to select the energy of the recoiling nuclei. We report measurements of the scintillation yields for nuclear recoils with energies from 10.3 to 57.2 keV and for applied electric fields from 0 to 1000 V/cm. For the ionization yields, we report measurements from 16.9 to 57.2 keV and for electric fields from 50 to 500 V/cm. We also report the observation of an anti-correlation between scintillation and ionization from nuclear recoils, which is similar to the anti-correlation between scintillation and ionization from electron recoils. Assuming that the energy partition in excitons and ion pairs of $^{83m}$Kr internal conversion electrons is comparable to that of $^{207}$Bi conversion electrons, we obtained the numbers of excitons ($N_{\\rm ex}$) and ion pairs ($N_{\\rm i}$) and their ratio ($N_{\\rm ex}$/$N_{\\rm i}$) produced by nuclear recoils from 16.9 to 57.2 keV. Motivated by arguments suggesting direction sensitivity in LAr-TPC signals due to columnar recombination, a comparison of the light and charge yield of recoils parallel and perpendicular to the applied electric field is presented for the first time.

H. Cao; T. Alexander; A. Aprahamian; R. Avetisyan; H. O. Back; A. G. Cocco; F. DeJongh; G. Fiorillo; C. Galbiati; L. Grandi; Y. Guardincerri; C. Kendziora; W. H. Lippincott; C. Love; S. Lyons; L. Manenti; C. J. Martoff; Y. Meng; D. Montanari; P. Mosteiro; D. Olvitt; S. Pordes; H. Qian; B. Rossi; R. Saldanha; S. Sangiorgio; K. Siegl; S. Y. Strauss; W. Tan; J. Tatarowicz; S. Walker; H. Wang; A. W. Watson; S. Westerdale; J. Yoo

2014-07-16T23:59:59.000Z

448

Validation of thermal models for a prototypical MEMS thermal actuator.  

SciTech Connect (OSTI)

This report documents technical work performed to complete the ASC Level 2 Milestone 2841: validation of thermal models for a prototypical MEMS thermal actuator. This effort requires completion of the following task: the comparison between calculated and measured temperature profiles of a heated stationary microbeam in air. Such heated microbeams are prototypical structures in virtually all electrically driven microscale thermal actuators. This task is divided into four major subtasks. (1) Perform validation experiments on prototypical heated stationary microbeams in which material properties such as thermal conductivity and electrical resistivity are measured if not known and temperature profiles along the beams are measured as a function of electrical power and gas pressure. (2) Develop a noncontinuum gas-phase heat-transfer model for typical MEMS situations including effects such as temperature discontinuities at gas-solid interfaces across which heat is flowing, and incorporate this model into the ASC FEM heat-conduction code Calore to enable it to simulate these effects with good accuracy. (3) Develop a noncontinuum solid-phase heat transfer model for typical MEMS situations including an effective thermal conductivity that depends on device geometry and grain size, and incorporate this model into the FEM heat-conduction code Calore to enable it to simulate these effects with good accuracy. (4) Perform combined gas-solid heat-transfer simulations using Calore with these models for the experimentally investigated devices, and compare simulation and experimental temperature profiles to assess model accuracy. These subtasks have been completed successfully, thereby completing the milestone task. Model and experimental temperature profiles are found to be in reasonable agreement for all cases examined. Modest systematic differences appear to be related to uncertainties in the geometric dimensions of the test structures and in the thermal conductivity of the polycrystalline silicon test structures, as well as uncontrolled nonuniform changes in this quantity over time and during operation.

Gallis, Michail A.; Torczynski, John Robert; Piekos, Edward Stanley; Serrano, Justin Raymond; Gorby, Allen D.; Phinney, Leslie Mary

2008-09-01T23:59:59.000Z

449

Medium-fi EvaluationMedium-fi PrototypesMedium-fi DesignLow-fi EvaluationLow-fi Prototypes What is Aphasia?  

E-Print Network [OSTI]

Medium-fi EvaluationMedium-fi PrototypesMedium-fi DesignLow-fi EvaluationLow-fi Prototypes What Cycle Investigated ability of existing technologies to fulfill needs. Extra time is needed to ensure. Evaluated with two participants. One had aphasia as a result of a brain tumour and the other as a result

Findlater, Leah

450

Construction of the CERN Fast Cycled Superconducting Dipole Magnet Prototype  

E-Print Network [OSTI]

CERN is pursuing a small scale R&D on a fast cycled superconducting dipole magnet (FCM) of interest for the upgrade plan of the LHC accelerator complex. The FCM dipole prototype being built has a number of novel features if compared to other magnets for similar applications. In this paper we describe the magnet design, and its expected performance, focusing especially on the novel features (magnetic circuit, mechanical supports, cooling) and on the details of the manufacturing procedure (coil winding and impregnation, joints, instrumentation and quench protection).

Borgnolutti, F; Bottura, L; Carra, F; Foffano, G; Gomes De Faria, J M; Kalouguine, O; Kirby, G; Lopez, C; Tommasini, D

2012-01-01T23:59:59.000Z

451

The Linac4 DTL Prototype: Low and High Power Measurements  

E-Print Network [OSTI]

The prototype of the Linac4 Drift Tube Linac (DTL) has undergone low power measurements in order to verify the RF coupling and to adjust the post-coupler lengths based on bead-pull and spectrum measurements. Following the installation at the test stand, the cavity has been subjected to high power operation at Linac4 and SPL duty cycles. Saturation effects and multipacting have been observed and linked to X-ray emission. Voltage holding is reported in the presence of magnetic fields from permanent magnet quadrupoles (PMQ) installed in the first drift tubes.

De Michele, G; Marques-Balula, J; Ramberger, S

2012-01-01T23:59:59.000Z

452

Design of an omnidirectional and holonomic wheeled platform prototype  

SciTech Connect (OSTI)

This paper presents the concepts for a new family of wheeled platforms which feature full omnidirectionality with simultaneous and independent rotational and translational motion capabilities. We first describe the original orthogonal-wheels assembly'' on which these platforms are based and discuss how a combination of these assemblies is used to generate an omnidirectional capability. The design and control of a prototype platform developed to test and demonstrate the proposed concepts is then described, and experimental results illustrating the full omnidirectionality of the platform with decoupled rotational and translational degrees of freedom are presented. 15 refs., 9 figs.

Killough, S.M.; Pin, F.G.

1991-01-01T23:59:59.000Z

453

Thermal Neutron Detectors with Discrete Anode Pad Readout  

SciTech Connect (OSTI)

A new two-dimensional thermal neutron detector concept that is capable of very high rates is being developed. It is based on neutron conversion in {sup 3}He in an ionization chamber (unity gas gain) that uses only a cathode and anode plane; there is no additional electrode such as a Frisch grid. The cathode is simply the entrance window, and the anode plane is composed of discrete pads, each with their own readout electronics implemented via application specific integrated circuits. The aim is to provide a new generation of detectors with key characteristics that are superior to existing techniques, such as higher count rate capability, better stability, lower sensitivity to background radiation, and more flexible geometries. Such capabilities will improve the performance of neutron scattering instruments at major neutron user facilities. In this paper, we report on progress with the development of a prototype device that has 48 x 48 anode pads and a sensitive area of 24cm x 24cm.

Yu,B.; Schaknowski, N.A., Smith, G.C., DeGeronimo, G., Vernon, E.O.

2008-10-19T23:59:59.000Z

454

Micro-Pocket Fission Detectors (MPFD) For Fuel Assembly Analysis  

SciTech Connect (OSTI)

Neutron sensors capable of real-time measurement of thermal flux, fast flux, and temperature in a single miniaturized probe are needed in irradiation tests required to demonstrate the performance of candidate new fuels, and cladding materials. In-core ceramic-based miniature neutron detectors or “Micro-Pocket Fission Detectors” (MPFDs) have been studied at Kansas State University (KSU). The first MPFD prototypes were tested in various neutron fields at the KSU TRIGA research reactor with successful results. Currently, a United States Department of Energy-sponsored joint KSU/Idaho National Laboratory (INL) effort is underway to develop a high-temperature, high-pressure version of the MPFD using radiation-resistant, high temperature materials, which would be capable of withstanding irradiation test conditions in high performance material and test reactors (MTRs). Ultimately, this more compact, more accurate, and longer lifetime flux sensor for critical mock-ups, existing and advanced reactor designs, high performance MTRs, and transient test reactors has the potential to lead to higher accuracy and resolution data from irradiation testing, more detailed core flux measurements and enhanced fuel assembly processing. Prior evaluations by KSU indicate that these sensors could also be used to monitor burn-up of nuclear fuel. If integrated into nuclear fuel assemblies, MPFDs offer several advantages to current spent fuel management systems.

Troy Unruh; Michael Reichenberger; Phillip Ugorowski

2013-09-01T23:59:59.000Z

455

X-ray and gamma ray detector readout system  

DOE Patents [OSTI]

A readout electronics scheme is under development for high resolution, compact PET (positron emission tomography) imagers based on LSO (lutetium ortho-oxysilicate, Lu.sub.2SiO.sub.5) scintillator and avalanche photodiode (APD) arrays. The key is to obtain sufficient timing and energy resolution at a low power level, less than about 30 mW per channel, including all required functions. To this end, a simple leading edge level crossing discriminator is used, in combination with a transimpedance preamplifier. The APD used has a gain of order 1,000, and an output noise current of several pA/ Hz, allowing bipolar technology to be used instead of CMOS, for increased speed and power efficiency. A prototype of the preamplifier and discriminator has been constructed, achieving timing resolution of 1.5 ns FWHM, 2.7 ns full width at one tenth maximum, relative to an LSO/PMT detector, and an energy resolution of 13.6% FWHM at 511 keV, while operating at a power level of 22 mW per channel. Work is in progress towards integration of this preamplifier and discriminator with appropriate coincidence logic and amplitude measurement circuits in an ASIC suitable for a high resolution compact PET instrument. The detector system and/or ASIC can also be used for many other applications for medical to industrial imaging.

Tumer, Tumay O (Riverside, CA); Clajus, Martin (Los Angeles, CA); Visser, Gerard (Bloomington, IN)

2010-10-19T23:59:59.000Z

456

Prototype of time digitizing system for BESIII endcap TOF upgrade  

E-Print Network [OSTI]

The prototype of time digitizing system for the upgrade of BESIII endcap TOF (ETOF) is introduced in this paper. The ETOF readout electronics has a formation of distributed architecture that hit signal from multi-gap resistive plate chamber (MRPC) is signaled as LVDS by front-end electronics (FEE) and sent to the back-end time digitizing system via long shield differential twisted pair cables. The ETOF digitizing system consists of 2 VME crates each of which contains modules of time digitizing, clock, trigger and fast control etc. The time digitizing module (TDIG) of this prototype can support up to 72 electrical channels of hit information measurement. The fast control (FCTL) module can operate at barrel or endcap mode. The barrel FCTL fans fast control signals from the trigger system out to endcap FCTLs, merges data from endcaps and transfers to the trigger system. Without modifying the barrel TOF structure, this time digitizing architecture benefits for improving ETOF performance without degrading barrel TOF measuring. Lab experiments show that the time resolution of this digitizing system can be less than 20ps, and the data throughput to DAQ can be about 92Mbps. Beam experiments show that the complete time resolution can be less than 45ps.

Cao Ping; Sun Wei-Jia; Ji Xiao-Lu; Fan Huan-Huan; Wang Si-Yu; Liu Shu-Bin; An Qi

2013-05-30T23:59:59.000Z

457

Report on Advanced Detector Development  

SciTech Connect (OSTI)

Neutron, gamma and charged particle detection improvements are key to supporting many of the foreseen measurements and systems envisioned in the R&D programs and the future fuel cycle requirements, such as basic nuclear physics and data, modeling and simulation, reactor instrumentation, criticality safety, materials management and safeguards. This task will focus on the developmental needs of the FCR&D experimental programs, such as elastic/inelastic scattering, total cross sections and fission neutron spectra measurements, and will leverage a number of existing neutron detector development efforts and programs, such as those at LANL, PNNL, INL, and IAC as well as those at many universities, some of whom are funded under NE grants and contracts. Novel materials and fabrication processes combined with state-of-the-art electronics and computing provide new opportunities for revolutionary detector systems that will be able to meet the high precision needs of the program. This work will be closely coordinated with the Nuclear Data Crosscut. The Advanced Detector Development effort is a broadly-focused activity that supports the development of improved nuclear data measurements and improved detection of nuclear reactions and reactor conditions. This work supports the design and construction of large-scale, multiple component detectors to provide nuclear reaction data of unprecedented quality and precision. Examples include the Time Projection Chamber (TPC) and the DANCE detector at LANL. This work also supports the fabrication and end-user application of novel scintillator materials detection and monitoring.

James K. Jewell

2012-09-01T23:59:59.000Z

458

Passive environmental radon detector study  

SciTech Connect (OSTI)

There are three stages at which the ambient air concentrations of radon-222 are monitored around the Uranium Mill Tailings Remedial Action (UMTRA) Project sites: before, during, and after construction. Pre-remedial-action measurements are taken for approximately 1 year. Monitoring is conducted during the entire duration of construction, and post-remedial-action monitoring is performed for approximately 1 year. Currently, the UMTRA Project uses Radtrak{reg_sign} brand alpha-track radon detectors for these environmental measurements. The purposes of radon monitoring around the UMTRA sites are (1) to determine background values around the site and pre-remedial-action conditions, (2) to control construction activities and monitor off-site releases, and (3) to compare post-remedial-action concentrations with pre-remedial-action values to demonstrate that radon concentrations have been reduced to approximately background levels. The Technical Assistance Contractor to the DOE for the UMTRA Project evaluated the performance of four different types of passive environmental radon detectors under both controlled laboratory conditions and field conditions at an unremediated UMTRA site. This study was undertaken to evaluate the accuracy and precision of four different passive, timeintegrating, environmental radon detectors in an effort to determine which brand of detector is best suited to measure environmental outdoor radon concentrations for the UMTRA Project. Voluntary manufacturer participation in the study was solicited by placing an advertisement in the Commerce Business Daily. All manufacturers participating in the study supplied the detectors and analysis free of charge.

Not Available

1992-03-01T23:59:59.000Z

459

Passive environmental radon detector study  

SciTech Connect (OSTI)

There are three stages at which the ambient air concentrations of radon-222 are monitored around the Uranium Mill Tailings Remedial Action (UMTRA) Project sites: before, during, and after construction. Pre-remedial-action measurements are taken for approximately 1 year. Monitoring is conducted during the entire duration of construction, and post-remedial-action monitoring is performed for approximately 1 year. Currently, the UMTRA Project uses Radtrak[reg sign] brand alpha-track radon detectors for these environmental measurements. The purposes of radon monitoring around the UMTRA sites are (1) to determine background values around the site and pre-remedial-action conditions, (2) to control construction activities and monitor off-site releases, and (3) to compare post-remedial-action concentrations with pre-remedial-action values to demonstrate that radon concentrations have been reduced to approximately background levels. The Technical Assistance Contractor to the DOE for the UMTRA Project evaluated the performance of four different types of passive environmental radon detectors under both controlled laboratory conditions and field conditions at an unremediated UMTRA site. This study was undertaken to evaluate the accuracy and precision of four different passive, timeintegrating, environmental radon detectors in an effort to determine which brand of detector is best suited to measure environmental outdoor radon concentrations for the UMTRA Project. Voluntary manufacturer participation in the study was solicited by placing an advertisement in the Commerce Business Daily. All manufacturers participating in the study supplied the detectors and analysis free of charge.

Not Available

1992-03-01T23:59:59.000Z

460

Modulated voltage metastable ionization detector  

SciTech Connect (OSTI)

Metastable ionization detectors used for chromatographic analysis usually employa fixed high voltage for the ionization potential. For this reason, the operating range is limited to about three orders of magnitude. By use of the technique disclosed in the instant invention, operating ranges of about nine orders of magnitude are obtained. The output current from a metastable ionization detector (MID) is applied to a modulation voltage circuit. An adjustment is made to balance out the background current, and an output current, above background, is applied to an input of a strip chart recorder. For low level concentrations, i.e., low detected output current, the ionization potential will be at a maximum and the metastable ionization detector will operate at its most sensitive level. When the detected current from the metastable ionization detector increases above a predetermined threshold level, a voltage control circuit is activated which turns on a high voltage transistor which acts to reduce the ionization potential. The ionization potential applied to the metastable ionization detector is then varied so as to maintain the detected signal level constant. The variation in ionization potential is now related to the concentration fo the constituent and a representative amplitude is applied to another input of said strip chart recorder.

Carle, G. C.; Humphry, D. E.; Kojiro, D. R.

1985-08-27T23:59:59.000Z

Note: This page contains sample records for the topic "argon prototype detector" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


461

Near infrared detectors for SNAP  

SciTech Connect (OSTI)

Large format (1k x 1k and 2k x 2k) near infrared detectors manufactured by Rockwell Scientific Center and Raytheon Vision Systems are characterized as part of the near infrared R&D effort for SNAP (the Super-Nova/Acceleration Probe). These are hybridized HgCdTe focal plane arrays with a sharp high wavelength cut-off at 1.7 um. This cut-off provides a sufficiently deep reach in redshift while it allows at the same time low dark current operation of the passively cooled detectors at 140 K. Here the baseline SNAP near infrared system is briefly described and the science driven requirements for the near infrared detectors are summarized. A few results obtained during the testing of engineering grade near infrared devices procured for the SNAP project are highlighted. In particular some recent measurements that target correlated noise between adjacent detector pixels due to capacitive coupling and the response uniformity within individual detector pixels are discussed.

Schubnell, M.; Barron, N.; Bebek, C.; Brown, M.G.; Borysow, M.; Cole, D.; Figer, D.; Lorenzon, W.; Mostek, N.; Mufson, S.; Seshadri, S.; Smith, R.; Tarle, G.

2006-05-23T23:59:59.000Z

462

The EXO-200 detector, part I: Detector design and construction  

E-Print Network [OSTI]

EXO-200 is an experiment designed to search for double beta decay of $^{136}$Xe with a single-phase, liquid xenon detector. It uses an active mass of 110 kg of xenon enriched to 80.6% in the isotope 136 in an ultra-low background time projection chamber capable of simultaneous detection of ionization and scintillation. This paper describes the EXO-200 detector with particular attention to the most innovative aspects of the design that revolve around the reduction of backgrounds, the efficient use of the expensive isotopically enriched xenon, and the optimization of the energy resolution in a relatively large volume.

M. Auger; D. J. Auty; P. S. Barbeau; L. Bartoszek; E. Baussan; E. Beauchamp; C. Benitez-Medina; M. Breidenbach; D. Chauhan; B. Cleveland; R. Conley; J. Cook; S. Cook; A. Coppens; W. Craddock; T. Daniels; C. G. Davis; J. Davis; R. deVoe; A. Dobi; M. J. Dolinski; M. Dunford; W. Fairbank Jr; J. Farine; P. Fierlinger; D. Franco; G. Giroux; R. Gornea; K. Graham; G. Gratta; C. Hagemann; C. Hall; K. Hall; C. Hargrove; S. Herrin; J. Hodgson; M. Hughes; A. Karelin; L. J. Kaufman; J. Kirk; A. Kuchenkov; K. S. Kumar; D. S. Leonard; F. Leonard; F. LePort; D. Mackay; R. MacLellan; M. Marino; K. Merkle; B. Mong; M. Montero Díez; A. R. Müller; R. Neilson; A. Odian; K. O'Sullivan; C. Ouellet; A. Piepke; A. Pocar; C. Y. Prescott; K. Pushkin; A. Rivas; E. Rollin; P. C. Rowson; A. Sabourov; D. Sinclair; K. Skarpaas; S. Slutsky; V. Stekhanov; V. Strickland; M. Swift; D. Tosi; K. Twelker; J. -L. Vuilleumier; J. -M. Vuilleumier; T. Walton; M. Weber; U. Wichoski; J. Wodin; J. D. Wright; L. Yang; Y. -R. Yen

2012-05-23T23:59:59.000Z

463

Silicon Detector Letter of Intent  

SciTech Connect (OSTI)

This document presents the current status of SiD's effort to develop an optimized design for an experiment at the International Linear Collider. It presents detailed discussions of each of SiD's various subsystems, an overview of the full GEANT4 description of SiD, the status of newly developed tracking and calorimeter reconstruction algorithms, studies of subsystem performance based on these tools, results of physics benchmarking analyses, an estimate of the cost of the detector, and an assessment of the detector R&D needed to provide the technical basis for an optimised SiD.

Aihara, H.; Burrows, P.; Oreglia, M.

2010-05-26T23:59:59.000Z

464

Evaluation of Computer-Based Procedure System Prototype  

SciTech Connect (OSTI)

This research effort is a part of the Light-Water Reactor Sustainability (LWRS) Program, which is a research and development (R&D) program sponsored by Department of Energy (DOE), performed in close collaboration with industry R&D programs, to provide the technical foundations for licensing and managing the long-term, safe, and economical operation of current nuclear power plants. The LWRS program serves to help the U.S. nuclear industry adopt new technologies and engineering solutions that facilitate the continued safe operation of the plants and extension of the current operating licenses. The introduction of advanced technology in existing nuclear power plants may help to manage the effects of aging systems, structures, and components. In addition, the incorporation of advanced technology in the existing LWR fleet may entice the future workforce, who will be familiar with advanced technology, to work for these utilities rather than more newly built nuclear power plants. Advantages are being sought by developing and deploying technologies that will increase safety and efficiency. One significant opportunity for existing plants to increase efficiency is to phase out the paper-based procedures (PBPs) currently used at most nuclear power plants and replace them, where feasible, with computer-based procedures (CBPs). PBPs have ensured safe operation of plants for decades, but limitations in paper-based systems do not allow them to reach the full potential for procedures to prevent human errors. The environment in a nuclear power plant is constantly changing depending on current plant status and operating mode. PBPs, which are static by nature, are being applied to a constantly changing context. This constraint often results in PBPs that are written in a manner that is intended to cover many potential operating scenarios. Hence, the procedure layout forces the operator to search through a large amount of irrelevant information to locate the pieces of information relevant for the task and situation at hand, which has potential consequences of taking up valuable time when operators must be responding to the situation, and potentially leading operators down an incorrect response path. Other challenges related to PBPs are the management of multiple procedures, place-keeping, finding the correct procedure for the task at hand, and relying on other sources of additional information to ensure a functional and accurate understanding of the current plant status (Converse, 1995; Fink, Killian, Hanes, & Naser, 2009; Le Blanc & Oxstrand, 2012). The main focus of this report is to describe the research activities conducted to address the remaining two objectives; Develop a prototype CBP system based on requirements identified and Evaluate the CBP prototype. The emphasis will be on the evaluation of an initial CBP prototype in at a Nuclear Power Plant.

Johanna Oxstrand; Katya Le Blanc; Seth Hays

2012-09-01T23:59:59.000Z

465

Niobium superconducting nanowire single-photon detectors  

E-Print Network [OSTI]

We investigate the performance of superconducting nanowire photon detectors fabricated from ultra-thin Nb. A direct comparison is made between these detectors and similar nanowire detectors fabricated from NbN. We find that Nb detectors are significantly more susceptible than NbN to thermal instability (latching) at high bias. We show that the devices can be stabilized by reducing the input resistance of the readout. Nb detectors optimized in this way are shown to have approximately 2/3 the reset time of similar large-active-area NbN detectors of the same geometry, with approximately 6% detection efficiency for single photons at 470 nm.

Annunziata, Anthony J; Chudow, Joel D; Frunzio, Luigi; Rooks, Michael J; Frydman, Aviad; Prober, Daniel E

2009-01-01T23:59:59.000Z

466

Partial doubly differential cross sections for multiple ionization of argon, krypton, and xenon atoms by electron impact  

SciTech Connect (OSTI)

Partial doubly differential cross sections for multiple ionization d/sup 2/sigma/sup (n)//dE d..cap omega.. of argon, krypton, and xenon by electron impact have been measured as a function of incident electron energy and ejected electron energy, for argon up to Ar/sup 4+/, for krypton up to Kr/sup 5+/, and for xenon up to Xe/sup 8+/. Incident electron energies between 0.5 and 10 keV were used, while the electrons ejected at an angle of 90/sup 0/ to the incident electron direction were detected with energies between 20 and 270 eV. The doubly differential cross section (sum of partial doubly differential cross sections) for ionization for each gas has been compared with experimental data in the literature.

Chaudhry, M.A.; Duncan, A.J.; Hippler, R.; Kleinpoppen, H.

1989-01-15T23:59:59.000Z

467

Research and Development for Massive Liquid Argon TPCs (LArTPC) for  

E-Print Network [OSTI]

University of California at Los Angeles, Los Angelas, CA 3 Yale University, New Haven, CT 4 Fermi National and solar neutrino experiments, as confirmed in the K2K accelerator neutrino experiment and the Kamland tank of 1-3-kton capacity using the same techniques as proposed for the 15-100-kton detectors

McDonald, Kirk

468

Radiation-hard ASICs for optical data transmission in the ATLAS pixel detector  

E-Print Network [OSTI]

We have developed two radiation-hard ASICs for optical data transmission in the ATLAS pixel detector at the LHC at CERN: a driver chip for a Vertical Cavity Surface Emitting Laser (VCSEL) diode for 80 Mbit/s data transmission from the detector, and a Bi-Phase Mark decoder chip to recover the control data and 40 MHz clock received optically by a PIN diode. We have successfully implemented both ASICs in 0.25 um CMOS technology using enclosed layout transistors and guard rings for increased radiation hardness. We present results from prototype circuits and from irradiation studies with 24 GeV protons up to 57 Mrad (1.9 x 10e15 p/cm2).

K. K. Gan

2003-03-13T23:59:59.000Z

469

Evaporative CO2 cooling using microchannels etched in silicon for the future LHCb vertex detector  

E-Print Network [OSTI]

The extreme radiation dose received by vertex detectors at the Large Hadron Collider dictates stringent requirements on their cooling systems. To be robust against radiation damage, sensors should be maintained below -20 degree C and at the same time, the considerable heat load generated in the readout chips and the sensors must be removed. Evaporative CO2 cooling using microchannels etched in a silicon plane in thermal contact with the readout chips is an attractive option. In this paper, we present the first results of microchannel prototypes with circulating, two-phase CO2 and compare them to simulations. We also discuss a practical design of upgraded VELO detector for the LHCb experiment employing this approach.

A. Nomerotski; J. Buytart; P. Collins; R. Dumps; E. Greening; M. John; A. Mapelli; A. Leflat; Y. Li; G. Romagnoli; B. Verlaat

2013-02-16T23:59:59.000Z

470

Risk D&D Rapid Prototype: Scenario Documentation and Analysis Tool  

SciTech Connect (OSTI)

Report describes process and methodology associated with a rapid prototype tool for integrating project risk analysis and health & safety risk analysis for decontamination and decommissioning projects.

Unwin, Stephen D.; Seiple, Timothy E.

2009-05-28T23:59:59.000Z

471

Development and Test of a Prototype 100MVA Superconducting Generator  

SciTech Connect (OSTI)

In 2002, General Electric and the US Department of Energy (DOE) entered into a cooperative agreement for the development of a commercialized 100 MVA generator using high temperature superconductors (HTS) in the field winding. The intent of the program was to: • Identify and develop technologies that would be needed for such a generator. • Develop conceptual designs for generators with ratings of 100 MVA and higher using HTS technology. • Perform proof of concept tests at the 1.5 MW level for GE’s proprietary warm iron rotor HTS generator concept. • Design, build, and test a prototype of a commercially viable 100 MVA generator that could be placed on the power grid. This report summarizes work performed during the program and is provided as one of the final program deliverables.

Fogarty, James M.; Bray, James W.

2007-05-25T23:59:59.000Z

472

Design and Testing of Prototypic Elements Containing Monolithic Fuel  

SciTech Connect (OSTI)

The US fuel development team has performed numerous irradiation tests on small to medium sized specimens containing low enriched uranium fuel designs. The team is now focused on qualification and demonstration of the uranium-molybdenum Base Monolithic Design and has entered the next generation of testing with the design and irradiation of prototypic elements which contain this fuel. The designs of fuel elements containing monolithic fuel, such as AFIP-7 (which is currently under irradiation) and RERTR-FE (which is currently under fabrication), are appropriate progressions relative to the technology life cycle. The culmination of this testing program will occur with the design, fabrication, and irradiation of demonstration products to include the base fuel demonstration and design demonstration experiments. Future plans show that design, fabrication, and testing activities will apply the rigor needed for a demonstration campaign.

N.E. Woolstenhulme; M.K. Meyer; D.M. Wachs

2011-10-01T23:59:59.000Z

473

Test report : Princeton power systems prototype energy storage system.  

SciTech Connect (OSTI)

The Department of Energy Office of Electricity (DOE/OE), Sandia National Laboratory (SNL) and the Base Camp Integration Lab (BCIL) partnered together to incorporate an energy storage system into a microgrid configured Forward Operating Base to reduce the fossil fuel consumption and to ultimately save lives. Energy storage vendors will be sending their systems to SNL Energy Storage Test Pad (ESTP) for functional testing and then to the BCIL for performance evaluation. The technologies that will be tested are electro-chemical energy storage systems comprised of lead acid, lithium-ion or zinc-bromide. Princeton Power Systems has developed an energy storage system that utilizes lithium ion phosphate batteries to save fuel on a military microgrid. This report contains the testing results and some limited analysis of performance of the Princeton Power Systems Prototype Energy Storage System.

Rose, David Martin; Schenkman, Benjamin L.; Borneo, Daniel R.

2013-08-01T23:59:59.000Z

474

Prototype spent-fuel canister design, analysis, and test  

SciTech Connect (OSTI)

Sandia National Laboratories was asked by the US Energy Research and Development Administration (now US Department of Energy) to design the spent fuel shipping cask system for the Clinch River Breeder Reactor Plant (CRBRP). As a part of this task, a canister which holds liquid sodium and the spent fuel assembly was designed, analyzed, and tested. The canister body survived the regulatory Type-B 9.1-m (30-ft) drop test with no apparent leakage. However, the commercially available metal seal used in this design leaked after the tests. This report describes the design approach, analysis, and prototype canister testing. Recommended work for completing the design, when funding is available, is included.

Leisher, W.B.; Eakes, R.G.; Duffey, T.A.

1982-03-01T23:59:59.000Z

475

Final report for 1.7 megajoule prototype bank testing  

SciTech Connect (OSTI)

American Control Engineering is pleased to submit to LLNL this Final Report describing the final assembly and preliminary testing of the 1.7 megajoule prototype capacitor bank that is located at our facility. The purpose of this test program was to evaluate and characterize the performance of this capacitor bank. These tests were necessary in order to proceed with the design of a final building block module that is to be used to create a reliable and cost effective multi-hundred megajoule energy storage system. The period of performance covered by this contract is from January 1, 1991 through August 31, 1992. American Control Engineering has provided all of the necessary facilities, personnel and materials that were required to perform this testing effort (except for the existing capacitor bank, the LLNL provided flashlamp assembly and E-size ignitron switch tube), An overall view of the assembled capacitor bank system as it appeared at the completion of this subcontract is shown. The initial statement-of-work for the testing and characterization of the capacitor bank was as follows: (1) Measure all of the principal electrical parameters for the 1.7 megajoule prototype capacitor bank at low voltage before proceeding to high voltage testing. This low voltage testing is to include measurement of both normal and fault current and voltage waveforms, starting with the smallest building block grouping and proceeding systematically through to the capacitor bank load. (2) Assemble and attach each of the major subsystem elements to the capacitor bank as they are required for low voltage testing including the ignition output switch structure, coaxial transmission line and load assembly. (3) Make comparison of the test results collected through low voltage testing with those forecasted by the computer mode. Evaluate and resolve any discrepancies between the two results until the computer model achieves reasonable agreement with the actual measured test results.

NONE

1995-10-01T23:59:59.000Z

476

Prototype dish testing and analysis at Sandia National Laboratories  

SciTech Connect (OSTI)

During the past year, Sandia National Laboratories performed on-sun testing of several dish concentrator concepts. These tests were undertaken at the National Solar Thermal Test Facility (NSTTF). Two of the tests were performed in support of the DOE Concentrator Receiver Development Program. The first was on-sun testing of the single-element stretched-membrane dish; this 7-meter diameter dish uses a single preformed metal membrane with an aluminized polyester optical surface and shows potential for future dish-Stirling systems. The next involved two prototype facets from the Faceted Stretched-Membrane Dish Program. These facets, representing competitive design concepts, are closest to commercialization. Five 1-meter triangular facets were tested on-sun as part of the development program for a solar dynamic system on Space Station Freedom. While unique in character, all the tests utilized the Beam Characterization System (BCS) as the main measurement tool and all were analyzed using the Sandia-developed CIRCE2 computer code. The BCS is used to capture and digitize an image of the reflected concentrator beam that is incident on a target surface. The CIRCE2 program provides a computational tool, which when given the geometry of the concentrator and target as well as other design parameters will predict the flux distribution of the reflected beam. One of these parameters, slope error, is the variable that has a major effect in determining the quality of the reflected beam. The methodology used to combine these two tools to predict uniform slope errors for the dishes is discussed in this document. As the Concentrator Development Programs continue, Sandia will test and evaluate two prototype dish systems. The first, the faceted stretched-membrane dish, is expected to be tested in 1992, followed by the full-scale single-element stretched-membrane dish in 1993. These tests will use the tools and methodology discussed in this document. 14 refs., 10 figs., 5 tabs.

Grossman, J.W.; Houser, R.M.; Erdman, W.W.

1991-01-01T23:59:59.000Z

477

A prototype photovoltaic/thermal system integrated with transpired collector  

SciTech Connect (OSTI)

Building-integrated photovoltaic/thermal (BIPV/T) systems may be utilized to produce useful heat while simultaneously generating electricity from the same building envelope surface. A well known highly efficient collector is the open-loop unglazed transpired collector (UTC) which consists of dark porous cladding through which outdoor air is drawn and heated by absorbed solar radiation. Commercially available photovoltaic systems typically produce electricity with efficiencies up to about 18%. Thus, it is beneficial to obtain much of the normally wasted heat from the systems, possibly by combining UTC with photovoltaics. Combination of BIPV/T and UTC systems for building facades is considered in this paper - specifically, the design of a prototype facade-integrated photovoltaic/thermal system with transpired collector (BIPV/T). A full scale prototype is constructed with 70% of UTC area covered with PV modules specially designed to enhance heat recovery and compared to a UTC of the same area under outdoor sunny conditions with low wind. The orientation of the corrugations in the UTC is horizontal and the black-framed modules are attached so as to facilitate flow into the UTC plenum. While the overall combined thermal efficiency of the UTC is higher than that of the BIPV/T system, the value of the generated energy - assuming that electricity is at least four times more valuable than heat - is between 7% and 17% higher. Also, the electricity is always useful while the heat is usually utilized only in the heating season. The BIPV/T concept is applied to a full scale office building demonstration project in Montreal, Canada. The ratio of photovoltaic area coverage of the UTC may be selected based on the fresh air heating needs of the building, the value of the electricity generated and the available building surfaces. (author)

Athienitis, Andreas K.; Bambara, James; O'Neill, Brendan; Faille, Jonathan [Dept. of Building, Civil and Environmental Engineering, Concordia University, 1455 Maisonneuve W., Montreal, Quebec (Canada)

2011-01-15T23:59:59.000Z

478

Eaton Throat-Valve Element prototype concept. Phase 1  

SciTech Connect (OSTI)

As part of an ongoing effort to improve techniques for simulating nuclear blasts, the US Army Research Laboratory has been studying the merits of computer-controlled valves. The valve studies have been aimed at providing the Department of Defense with the capacity to conduct nuclear blast and thermal survivability testing on full-scale tactical vehicles. This report documents the development and findings of a computer model that simulates the behavior of the Eaton-Throat Valve Element (ETVE) prototype, and describes a proposed modification concept for the ETVE. The computer model reveals three main findings: (1) the ETVE chatters during the open cycle, (2) the chatter is caused by the high gas forces on the sliding sleeve as the driver gas passes through its portholes, and (3) the chatter is aggravated because there is insufficient damping in the system. The INEL recommends opening the ETVE by sliding the sleeve toward the downstream end of the valve instead of toward the upstream end, as the ETVE is presently configured, and to provide additional damping to the system. However, neither of these configuration changes can be achieved easily, and a redesign and analysis f the ETVE must be completed prior to performing any work on the current ETVE prototype. The ETVE simulation model proved to be an extremely valuable tool in analyzing the qualitative nature of the valve`s operation. Further development of the model is recommended for quantitative analysis and design of the ETVE. This report explains the model and stress analysis findings, and proposes a redesign concept.

Stacey, M.R.; Arendts, J.G.; Berry, R.A.; Korth, G.E.; Schwieder, P.R.; Sekot, J.P.; Snow, S.D.

1993-12-01T23:59:59.000Z

479

A prototype catalogue: DOE National Laboratory technologies for infrastructure modernization  

SciTech Connect (OSTI)

The purpose of this report is to provide the Office of Technology Assessment (OTA) with information about selected technologies under development in the Department of Energy (DOE) through its National Laboratory System and its Program Office operations. The technologies selected are those that have the potential to improve the performance of the nation's public works infrastructure. The product is a relational database that we refer to as a prototype catalogue of technologies.'' The catalogue contains over 100 entries of DOE-supported technologies having potential application to infrastructure-related problems. The work involved conceptualizing an approach, developing a framework for organizing technology information, and collecting samples of readily available data to be put into a prototype catalogue. In developing the catalogue, our objectives were to demonstrate the concept and provide readily available information to OTA. As such, the catalogue represents a preliminary product. The existing database is not exhaustive and likely represents only a fraction of relevant technologies developed by DOE. In addition, the taxonomy we used to classify technologies is based on the judgment of project staff and has received minimal review by individuals who have been involved in the development and testing of the technologies. Finally, end users will likely identify framework changes and additions that will strengthen the catalogue approach. The framework for the catalogue includes four components: a description of the technology, along with potential uses and other pertinent information; identification of the source of the descriptive information; identification of a person or group knowledgeable about the technology; and a classification of the described technology in terms of its type, application, life-cycle use, function, and readiness.

Currie, J.W.; Wilfert, G.L.; March, F.

1990-01-01T23:59:59.000Z

480

Direct detector for terahertz radiation  

DOE Patents [OSTI]

A direct detector for terahertz radiation comprises a grating-gated field-effect transistor with one or more quantum wells that provide a two-dimensional electron gas in the channel region. The grating gate can be a split-grating gate having at least one finger that can be individually biased. Biasing an individual finger of the split-grating gate to near pinch-off greatly increases the detector's resonant response magnitude over prior QW FET detectors while maintaining frequency selectivity. The split-grating-gated QW FET shows a tunable resonant plasmon response to FIR radiation that makes possible an electrically sweepable spectrometer-on-a-chip with no moving mechanical optical parts. Further, the narrow spectral response and signal-to-noise are adequate for use of the split-grating-gated QW FET in a passive, multispectral terahertz imaging system. The detector can be operated in a photoconductive or a photovoltaic mode. Other embodiments include uniform front and back gates to independently vary the carrier densities in the channel region, a thinned substrate to increase bolometric responsivity, and a resistive shunt to connect the fingers of the grating gate in parallel and provide a uniform gate-channel voltage along the length of the channel to increase the responsivity and improve the spectral resolution.

Wanke, Michael C. (Albuquerque, NM); Lee, Mark (Albuquerque, NM); Shaner, Eric A. (Albuquerque, NM); Allen, S. James (Santa Barbara, CA)

2008-09-02T23:59:59.000Z

Note: This page contains sample records for the topic "argon prototype detector" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


481

High-order above-threshold ionization of argon: Plateau resonances and the Floquet quasienergy spectrum  

SciTech Connect (OSTI)

The Floquet quasienergy spectrum of argon in a strong laser field of 800 nm wavelength is calculated for intensities up to 7x10{sup 13} W cm{sup -2}, and beyond for some states, using a discrete complex basis set. Many of the dressed excited states of interest shift nonponderomotively in complicated ways but keep an ionization width narrow enough to produce sharp enhancements of above-threshold ionization (ATI) through Stark-shift-induced resonances. The quasienergy map is compared to high-resolution ATI spectra for 120 fs Ti:sapphire pulses [Nandor et al., Phys. Rev. A 60, R1771 (1999)]. The plateau enhancements happen at intensities where the dressed ground state is in resonance or in the wing of resonances with dressed excited states. The resonant dressed states are identified. In many cases, the same state is responsible for an enhancement of ATI in the low as well as the high orders. No evidence is found for enhancements that are not concomitant with any curve crossing and could thereby be interpreted as channel-closing enhancement.

Potvliege, R. M.; Vucic, Svetlana [Department of Physics, Durham University, Durham DH1 3LE (United Kingdom); Institute of Physics, Pregrevica 118, 11080 Belgrade-Zemun (Serbia and Montenegro)

2006-08-15T23:59:59.000Z

482

Development of remote crane system for use inside small argon hot-cell  

SciTech Connect (OSTI)

In this paper, we describe the design of a novel crane system for the use in a small argon hot-cell where only a pair of master-slave manipulators (MSM) is available for the remote maintenance of the crane. To increase the remote maintainability in the space-limited environment, we devised a remote actuation mechanism in which electrical parts consisting of a servo-motor, a position sensor, and two limit switches located inside the workspace of the MSM transmit power to the mechanical parts located in the ceiling. Even though the design concept does not provide thoroughly sufficient solution because the mechanical parts are placed out of the MSM's workspace, the durability of mechanical parts can be easily increased if they have a high safety margin. Therefore, the concept may be one of the best solutions for our special crane system. In addition, we developed a servo-control system based on absolute positioning technology; therefore, it is possible for us to perform the given tasks more safely through an automatic operation. (authors)

Lee, Jong Kwang; Park, Byung Suk; Yu, Seung-Nam; Kim, Kiho; Cho, Ilje [Nuclear Fuel Cycle Process Technology Development Division, Korea Atomic Energy Research Institute, Daejeon (Korea, Republic of)

2013-07-01T23:59:59.000Z

483

Effect of process parameters on properties of argon–nitrogen plasma for titanium nitride film deposition  

SciTech Connect (OSTI)

In this study, the effect of working pressure and input power on the physical properties and sputtering efficiencies of argon–nitrogen (Ar/N{sub 2}) plasma in direct current magnetron discharge is investigated. The discharge in Ar/N{sub 2} is used to deposit TiN films on high speed steel substrate. The physical plasma parameters are determined by using Langmuir probe and optical emission spectroscopy. On the basis of the different reactions in the gas phase, the variation of plasma parameters and sputtering rate are explained. A prominent change of electron temperature, electron density, ion density, and degree of ionization of Ar is found as a function of working pressure and input power. The results also show that increasing working pressure exerts a negative effect on film deposition rate while increasing input power has a positive impact on the same. To confirm the observed physical properties and evaluate the texture growth as a function of deposition parameters, x-ray diffraction study of deposited TiN films is also done.

Saikia, Partha; Kakati, Bharat [Centre of Plasma Physics, Institute for Plasma Research, Nazirakhat, Sonapur-782 402, Kamrup, Assam (India)] [Centre of Plasma Physics, Institute for Plasma Research, Nazirakhat, Sonapur-782 402, Kamrup, Assam (India)

2013-11-15T23:59:59.000Z

484

Neutron coincidence detectors employing heterogeneous materials  

DOE Patents [OSTI]

A neutron detector relies upon optical separation of different scintillators to measure the total energy and/or number of neutrons from a neutron source. In pulse mode embodiments of the invention, neutrons are detected in a first detector which surrounds the neutron source and in a second detector surrounding the first detector. An electronic circuit insures that only events are measured which correspond to neutrons first detected in the first detector followed by subsequent detection in the second detector. In spectrometer embodiments of the invention, neutrons are thermalized in the second detector which is formed by a scintillator-moderator and neutron energy is measured from the summed signals from the first and second detectors.

Czirr, J. Bartley (Mapleton, UT); Jensen, Gary L. (Orem, UT)

1993-07-27T23:59:59.000Z

485

GERDA phase II detectors: Behind the production and characterisation at low background conditions  

SciTech Connect (OSTI)

The low background GERmanium Detector Array (GERDA) at Laboratori Nazionali del Gran Sasso (LNGS) is designed to search for the rare neutrinoless double beta decay (0???) in {sup 76}Ge. Bare germanium diodes are operated in liquid argon which is used as coolant, as passive and soon active as well shield against external radiation. Currently, Phase I of the experiment is running using ?15 kg of co-axial High Purity Germanium diodes. In order to increase the sensitivity of the experiment 30 Broad Energy Germanium (BEGe) diodes will be added within 2013. This presentation reviews the production chain of the new BEGe detectors from isotopic enrichment to diode production and testing. As demonstrated all steps were carefully planned in order to minimize the exposure of the enriched germanium to cosmic radiation. Following this premise, acceptance and characterisation measurement of the newly produced diodes have been performed within the HEROICA project in the Belgian underground laboratory HADES close to the diode manufacturer. The test program and the results from a subset of the recently terminated GERDA Phase II BEGe survey will be presented.

Maneschg, Werner [Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg (Germany)] [Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg (Germany); Collaboration: GERDA Collaboration; and others

2013-08-08T23:59:59.000Z

486

Results of the BiPo-1 prototype for radiopurity measurements for the SuperNEMO double beta decay source foils  

E-Print Network [OSTI]

The development of BiPo detectors is dedicated to the measurement of extremely high radiopurity in $^{208}$Tl and $^{214}$Bi for the SuperNEMO double beta decay source foils. A modular prototype, called BiPo-1, with 0.8 $m^2$ of sensitive surface area, has been running in the Modane Underground Laboratory since February, 2008. The goal of BiPo-1 is to measure the different components of the background and in particular the surface radiopurity of the plastic scintillators that make up the detector. The first phase of data collection has been dedicated to the measurement of the radiopurity in $^{208}$Tl. After more than one year of background measurement, a surface activity of the scintillators of $\\mathcal{A}$($^{208}$Tl) $=$ 1.5 $\\mu$Bq/m$^2$ is reported here. Given this level of background, a larger BiPo detector having 12 m$^2$ of active surface area, is able to qualify the radiopurity of the SuperNEMO selenium double beta decay foils with the required sensitivity of $\\mathcal{A}$($^{208}$Tl) $<$ 2 $\\mu$...

Argyriades, J; Augier, C; Baker, J; Barabash, A S; Basharina-Freshville, A; Bongrand, M; Bourgeois, C; Breton, D; Briére, M; Broudin-Bay, G; Brudanin, V B; Caffrey, A J; Cebrián, S; Chapon, A; Chauveau, E; Dafni, Th; Díaz, J; Durand, D; Egorov, V G; Evans, J J; Flack, R; Fushima, K-I; Irastorza, I G; Garrido, X; Gómez, H; Guillon, B; Holin, A; Holy, K; Horkey, J J; Hubert, P; Hugon, C; Iguaz, F J; Ishihara, N; Jackson, C M; Jenzer, S; Jullian, S; Kauer, M; Kochetov, O I; Konovalov, S I; Kovalenko, V; Lamhamdi, T; Lang, K; Lemiére, Y; Lutter, G; Luzón, G; Mamedov, F; Marquet, Ch; Mauger, F; Monrabal, F; Nachab, A; Nemchenok, I B; Nguyen, C H; Nomachi, M; Nova, F; Ohsumi, H; Pahlka, R B; Perrot, F; Piquemal, F; Povinec, P P; Richards, B; Ricol, J S; Riddle, C L; Rodríguez, A; Saakyan, R; Sarazin, X; Sedgbeer, J K; Serra, L; Shitov, Yu A; Simard, L; Šimkovic, F; Söldner-Rembold, S; Štekl, I; Sutton, C S; Tamagawa, Y; Szklarz, G; Thomas, J; Timkin, V; Tretyak, V; Tretyak, Vl I; Umatov, V I; Vála, L; Vanyushin, I A; Vasiliev, R; Vasiliev, V A; Vorobel, V; Waters, D; Yahali, N; Žukauskas, A

2010-01-01T23:59:59.000Z

487

Hybrid anode for semiconductor radiation detectors  

DOE Patents [OSTI]

The present invention relates to a novel hybrid anode configuration for a radiation detector that effectively reduces the edge effect of surface defects on the internal electric field in compound semiconductor detectors by focusing the internal electric field of the detector and redirecting drifting carriers away from the side surfaces of the semiconductor toward the collection electrode(s).

Yang, Ge; Bolotnikov, Aleksey E; Camarda, Guiseppe; Cui, Yonggang; Hossain, Anwar; Kim, Ki Hyun; James, Ralph B

2013-11-19T23:59:59.000Z

488

The Harris Corner Detector Konstantinos G. Derpanis  

E-Print Network [OSTI]

will result in a significant increase; this indicates a corner. References [1] C. Harris and M.J. StephensThe Harris Corner Detector Konstantinos G. Derpanis kosta@cs.yorku.ca October 27, 2004 In this report the derivation of the Harris corner detector [1] is presented. The Harris corner detector

Salvaggio, Carl

489

TORCH — an Innovative High-Precision Time-of-Flight PID Detector for the LHCb Upgrade  

E-Print Network [OSTI]

TORCH is a Cherenkov time-of-flight detector being developed as a particle identification system for the upgraded LHCb experiment. The DIRC-type detector is located at 10m distance from the interaction point with an area of 30m$^2$ and is formed from 10mm thick synthetic amorphous fused silica plates. In this Cherenkov radiator the photons that propagate by total internal reflection to the plate edge are focussed onto an array of position-sensitive micro-channel plate sensors. Combining the photon timings the goal is to achieve a $\\sigma$ = 15 ps timing resolution per particle, yielding 3$\\sigma$ pion-kaon separation up to 10 GeV/c or better. Requirements for the photon detectors are presented together with preliminary prototype results. Preparations for the upcoming test beam are discussed. Optical design studies have been performed for using one of the available bar boxes of the BaBar DIRC detector containing assembled quartz radiator bars in a future test beam experiment.

Fohl, Klaus

2015-01-01T23:59:59.000Z

490

Subatomic Physics Detector Lab Design, construction and testing of particle detectors for  

E-Print Network [OSTI]

for position sensitivity. polycrystalline diamond after surface prep at NSFL ebeam in to expt.Diamond detector imaging at HSC #12; Diamond Detectors for Particle Physics J.W. Martin et al, U. Winnipeg Detectors. Synthetic diamond used as a semiconductor detector (eh pair creation) ­ fast response, low noise ­ very

Martin, Jeff

491

InvenTcl: A Fast Prototyping Environment for 3D Graphics and Multimedia Applications  

E-Print Network [OSTI]

InvenTcl: A Fast Prototyping Environment for 3D Graphics and Multimedia Applications Sidney Fels1- sion of Open Inventor, a 3D graphics toolkit. To create InvenTcl, the Open Inven