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Note: This page contains sample records for the topic "high precision tester" 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
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1

TUBE TESTER  

DOE Patents (OSTI)

This patent relates to tube testing, and in particular describes a tube tester for automatic testing of a number of vacuum tubes while in service and as frequently as may be desired. In it broadest aspects the tube tester compares a particular tube with a standard tube tarough a difference amplifier. An unbalanced condition in the circuit of the latter produced by excessive deviation of the tube in its characteristics from standard actuates a switch mechanism stopping the testing cycle and indicating the defective tube.

Gittings, H.T. Jr.; Kalbach, J.F.

1958-01-14T23:59:59.000Z

2

Explosives tester  

DOE Patents (OSTI)

An explosives tester that can be used anywhere as a screening tool by non-technical personnel to determine whether a surface contains explosives. First and second explosives detecting reagent holders and dispensers are provided. A heater is provided for receiving the first and second explosives detecting reagent holders and dispensers.

Haas, Jeffrey S. (San Ramon, CA); Howard, Douglas E. (Livermore, CA); Eckels, Joel D. (Livermore, CA); Nunes, Peter J. (Danville, CA)

2011-01-11T23:59:59.000Z

3

High precision redundant robotic manipulator  

SciTech Connect

A high precision redundant robotic manipulator for overcoming contents imposed by obstacles or imposed by a highly congested work space. One embodiment of the manipulator has four degrees of freedom and another embodiment has seven degreed of freedom. Each of the embodiments utilize a first selective compliant assembly robot arm (SCARA) configuration to provide high stiffness in the vertical plane, a second SCARA configuration to provide high stiffness in the horizontal plane. The seven degree of freedom embodiment also utilizes kinematic redundancy to provide the capability of avoiding obstacles that lie between the base of the manipulator and the end effector or link of the manipulator. These additional three degrees of freedom are added at the wrist link of the manipulator to provide pitch, yaw and roll. The seven degrees of freedom embodiment uses one revolute point per degree of freedom. For each of the revolute joints, a harmonic gear coupled to an electric motor is introduced, and together with properly designed based servo controllers provide an end point repeatability of less than 10 microns.

Young, Kar-Keung David (Mountain View, CA)

1998-01-01T23:59:59.000Z

4

High precision redundant robotic manipulator  

SciTech Connect

A high precision redundant robotic manipulator for overcoming contents imposed by obstacles or imposed by a highly congested work space is disclosed. One embodiment of the manipulator has four degrees of freedom and another embodiment has seven degrees of freedom. Each of the embodiments utilize a first selective compliant assembly robot arm (SCARA) configuration to provide high stiffness in the vertical plane, a second SCARA configuration to provide high stiffness in the horizontal plane. The seven degree of freedom embodiment also utilizes kinematic redundancy to provide the capability of avoiding obstacles that lie between the base of the manipulator and the end effector or link of the manipulator. These additional three degrees of freedom are added at the wrist link of the manipulator to provide pitch, yaw and roll. The seven degrees of freedom embodiment uses one revolute point per degree of freedom. For each of the revolute joints, a harmonic gear coupled to an electric motor is introduced, and together with properly designed based servo controllers provide an end point repeatability of less than 10 microns. 3 figs.

Young, K.K.D.

1998-09-22T23:59:59.000Z

5

High Precision Radiometric Dating of Sedimentary Materials  

SciTech Connect

To develop field, petrographic and geochemical criteria to allow high precision U-Pb dating of sedimentary minerals within rapidly deposited sequences of carbonate and clastic rocks.

Hanson, G. N.

2006-09-19T23:59:59.000Z

6

High Precision Geophysics & Detailed Structural Exploration ...  

Open Energy Info (EERE)

icon High Precision Geophysics & Detailed Structural Exploration & Slim Well Drilling Geothermal Project Jump to: navigation, search Last modified on July 22, 2011....

7

High precision thermal neutron detectors  

Science Conference Proceedings (OSTI)

Two-dimensional position sensitive detectors are indispensable in neutron diffraction experiments for determination of molecular and crystal structures in biology, solid-state physics and polymer chemistry. Some performance characteristics of these detectors are elementary and obvious, such as the position resolution, number of resolution elements, neutron detection efficiency, counting rate and sensitivity to gamma-ray background. High performance detectors are distinguished by more subtle characteristics such as the stability of the response (efficiency) versus position, stability of the recorded neutron positions, dynamic range, blooming or halo effects. While relatively few of them are needed around the world, these high performance devices are sophisticated and fairly complex; their development requires very specialized efforts. In this context, we describe here a program of detector development, based on {sup 3}He filled proportional chambers, which has been underway for some years at Brookhaven. Fundamental approaches and practical considerations are outlined that have resulted in a series of high performance detectors with the best known position resolution, position stability, uniformity of reliability over time of this type.

Radeka, V.; Schaknowski, N.A.; Smith, G.C.; and Yu, B.

1994-10-01T23:59:59.000Z

8

High-Precision Computation and Mathematical Physics  

SciTech Connect

At the present time, IEEE 64-bit floating-point arithmetic is sufficiently accurate for most scientific applications. However, for a rapidly growing body of important scientific computing applications, a higher level of numeric precision is required. Such calculations are facilitated by high-precision software packages that include high-level language translation modules to minimize the conversion effort. This paper presents a survey of recent applications of these techniques and provides some analysis of their numerical requirements. These applications include supernova simulations, climate modeling, planetary orbit calculations, Coulomb n-body atomic systems, scattering amplitudes of quarks, gluons and bosons, nonlinear oscillator theory, Ising theory, quantum field theory and experimental mathematics. We conclude that high-precision arithmetic facilities are now an indispensable component of a modern large-scale scientific computing environment.

Bailey, David H.; Borwein, Jonathan M.

2008-11-03T23:59:59.000Z

9

Common tester platform concept.  

Science Conference Proceedings (OSTI)

This report summarizes the results of a case study on the doctrine of a common tester platform, a concept of a standardized platform that can be applicable across the broad spectrum of testing requirements throughout the various stages of a weapons program, as well as across the various weapons programs. The common tester concept strives to define an affordable, next-generation design that will meet testing requirements with the flexibility to grow and expand; supporting the initial development stages of a weapons program through to the final production and surveillance stages. This report discusses a concept investing key leveraging technologies and operational concepts combined with prototype tester-development experiences and practical lessons learned gleaned from past weapons programs.

Hurst, Michael James

2008-05-01T23:59:59.000Z

10

Precision control of high temperature furnaces  

DOE Patents (OSTI)

It is an object of the present invention to provide precision control of high temperature furnaces. It is another object of the present invention to combine the power of two power supplies of greatly differing output capacities in a single furnace. This invention combines two power supplies to control a furnace. A main power supply heats the furnace in the traditional manner, while the power from the auxiliary supply is introduced as a current flow through charged particles existing due to ionized gas or thermionic emission. The main power supply provides the bulk heating power and the auxiliary supply provides a precise and fast power source such that the precision of the total power delivered to the furnace is improved. Further, this invention comprises a means for high speed measurement of temperature of the process by the method of measuring the amount of current flow in a deliberately induced charged particle current.

Pollock, G.G.

1994-12-31T23:59:59.000Z

11

Portable high precision pressure transducer system  

DOE Patents (OSTI)

A high precision pressure transducer system is described for checking the reliability of a second pressure transducer system used to monitor the level of a fluid confined in a holding tank. Since the response of the pressure transducer is temperature sensitive, it is continually housed in an battery powered oven which is configured to provide a temperature stable environment at specified temperature for an extended period of time. Further, a high precision temperature stabilized oscillator and counter are coupled to a single board computer to accurately determine the pressure transducer oscillation frequency and convert it to an applied pressure. All of the components are powered by the batteries which during periods of availability of line power are charged by an on board battery charger. The pressure readings outputs are transmitted to a line printer and a vacuum fluorescent display. 2 figures.

Piper, T.C.; Morgan, J.P.; Marchant, N.J.; Bolton, S.M.

1994-04-26T23:59:59.000Z

12

Portable high precision pressure transducer system  

DOE Patents (OSTI)

A high precision pressure transducer system for checking the reliability of a second pressure transducer system used to monitor the level of a fluid confined in a holding tank. Since the response of the pressure transducer is temperature sensitive, it is continually housed in an battery powered oven which is configured to provide a temperature stable environment at specified temperature for an extended period of time. Further, a high precision temperature stabilized oscillator and counter are coupled to a single board computer to accurately determine the pressure transducer oscillation frequency and convert it to an applied pressure. All of the components are powered by the batteries which during periods of availability of line power are charged by an on board battery charger. The pressure readings outputs are transmitted to a line printer and a vacuum florescent display.

Piper, T.C.; Morgan, J.P.; Marchant, N.J.; Bolton, S.M.

1992-12-31T23:59:59.000Z

13

Portable high precision pressure transducer system  

SciTech Connect

A high precision pressure transducer system for checking the reliability of a second pressure transducer system used to monitor the level of a fluid confined in a holding tank. Since the response of the pressure transducer is temperature sensitive, it is continually housed in an battery powered oven which is configured to provide a temperature stable environment at specified temperature for an extended period of time. Further, a high precision temperature stabilized oscillator and counter are coupled to a single board computer to accurately determine the pressure transducer oscillation frequency and convert it to an applied pressure. All of the components are powered by the batteries which during periods of availability of line power are charged by an on board battery charger. The pressure readings outputs are transmitted to a line printer and a vacuum florescent display.

Piper, Thomas C. (Idaho Falls, ID); Morgan, John P. (Idaho Falls, ID); Marchant, Norman J. (Idaho Falls, ID); Bolton, Steven M. (Pocatello, ID)

1994-01-01T23:59:59.000Z

14

Inspection tester for explosives  

DOE Patents (OSTI)

An inspection tester that can be used anywhere as a primary screening tool by non-technical personnel to determine whether a surface contains explosives. It includes a body with a sample pad. First and second explosives detecting reagent holders and dispensers are operatively connected to the body and the sample pad. The first and second explosives detecting reagent holders and dispensers are positioned to deliver the explosives detecting reagents to the sample pad. A is heater operatively connected to the sample pad.

Haas, Jeffrey S. (San Ramon, CA); Simpson, Randall L. (Livermore, CA); Satcher, Joe H. (Patterson, CA)

2007-11-13T23:59:59.000Z

15

Inspection tester for explosives  

DOE Patents (OSTI)

An inspection tester that can be used anywhere as a primary screening tool by non-technical personnel to determine whether a surface contains explosives. It includes a body with a sample pad. First and second explosives detecting reagent holders and dispensers are operatively connected to the body and the sample pad. The first and second explosives detecting reagent holders and dispensers are positioned to deliver the explosives detecting reagents to the sample pad. A is heater operatively connected to the sample pad.

Haas, Jeffrey S. (San Ramon, CA); Simpson, Randall L. (Livermore, CA); Satcher, Joe H. (Patterson, CA)

2010-10-05T23:59:59.000Z

16

Highly damped kinematic coupling for precision instruments  

SciTech Connect

A highly damped kinematic coupling for precision instruments. The kinematic coupling provides support while causing essentially no influence to its nature shape, with such influences coming, for example, from manufacturing tolerances, temperature changes, or ground motion. The coupling uses three ball-cone constraints, each combined with a released flexural degree of freedom. This arrangement enables a gain of higher load capacity and stiffness, but can also significantly reduce the friction level in proportion to the ball radius divided by the distance between the ball and the hinge axis. The blade flexures reduces somewhat the stiffness of the coupling and provides an ideal location to apply constrained-layer damping which is accomplished by attaching a viscoelastic layer and a constraining layer on opposite sides of each of the blade flexures. The three identical ball-cone flexures provide a damped coupling mechanism to kinematically support the projection optics system of the extreme ultraviolet lithography (EUVL) system, or other load-sensitive apparatus.

Hale, Layton C. (Livermore, CA); Jensen, Steven A. (Livermore, CA)

2001-01-01T23:59:59.000Z

17

High-precision triangular-waveform generator  

DOE Patents (OSTI)

An ultra-linear ramp generator having separately programmable ascending and decending ramp rates and voltages is provided. Two constant current sources provide the ramp through an integrator. Switching of the current at current source inputs rather than at the integrator input eliminates switching transients and contributes to the waveform precision. The triangular waveforms produced by the waveform generator are characterized by accurate reproduction and low drift over periods of several hours. The ascending and descending slopes are independently selectable.

Mueller, T.R.

1981-11-14T23:59:59.000Z

18

High-precision optical and microwave signal synthesis and distribution  

E-Print Network (OSTI)

In this thesis, techniques for high-precision synthesis of optical and microwave signals and their distribution to remote locations are presented. The first topic is ultrafast optical pulse synthesis by coherent superposition ...

Kim, Jung-Won, 1976-

2007-01-01T23:59:59.000Z

19

Finger wear detection for production line battery tester  

DOE Patents (OSTI)

A method is described for detecting wear in a battery tester probe. The method includes providing a battery tester unit having at least one tester finger, generating a tester signal using the tester fingers and battery tester unit with the signal characteristic of the electrochemical condition of the battery and the tester finger, applying wavelet transformation to the tester signal including computing a mother wavelet to produce finger wear indicator signals, analyzing the signals to create a finger wear index, comparing the wear index for the tester finger with the index for a new tester finger and generating a tester finger signal change signal to indicate achieving a threshold wear change. 9 figs.

Depiante, E.V.

1997-11-18T23:59:59.000Z

20

Finger wear detection for production line battery tester  

SciTech Connect

A method for detecting wear in a battery tester probe. The method includes providing a battery tester unit having at least one tester finger, generating a tester signal using the tester fingers and battery tester unit with the signal characteristic of the electrochemical condition of the battery and the tester finger, applying wavelet transformation to the tester signal including computing a mother wavelet to produce finger wear indicator signals, analyzing the signals to create a finger wear index, comparing the wear index for the tester finger with the index for a new tester finger and generating a tester finger signal change signal to indicate achieving a threshold wear change.

Depiante, Eduardo V. (16 W. 505 Mockingbird La., Apt. 204, Hinsdale, IL 60521-6621)

1997-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "high precision tester" 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

System and method for high precision isotope ratio destructive analysis  

DOE Patents (OSTI)

A system and process are disclosed that provide high accuracy and high precision destructive analysis measurements for isotope ratio determination of relative isotope abundance distributions in liquids, solids, and particulate samples. The invention utilizes a collinear probe beam to interrogate a laser ablated plume. This invention provides enhanced single-shot detection sensitivity approaching the femtogram range, and isotope ratios that can be determined at approximately 1% or better precision and accuracy (relative standard deviation).

Bushaw, Bruce A; Anheier, Norman C; Phillips, Jon R

2013-07-02T23:59:59.000Z

22

High-Voltage Impulse Testers  

Science Conference Proceedings (OSTI)

... The objective of this test circuit is to super- impose on a ... pulse is coupled across inductance L by the coupling capacitor Ca. ... P lastic Capacitors, Inc. ...

2013-05-17T23:59:59.000Z

23

(Quickly) testing the tester via path coverage  

Science Conference Proceedings (OSTI)

The configuration complexity and code size of an automated testing framework may grow to a point that the tester itself becomes a significant software artifact, prone to poor configuration and implementation errors. Unfortunately, testing the tester ... Keywords: evaluation of test systems, regression testing, test frameworks

Alex Groce

2009-07-01T23:59:59.000Z

24

High Precision Geophysics & Detailed Structural Exploration & Slim Well  

Open Energy Info (EERE)

Precision Geophysics & Detailed Structural Exploration & Slim Well Precision Geophysics & Detailed Structural Exploration & Slim Well Drilling Geothermal Project Jump to: navigation, search Last modified on July 22, 2011. Project Title High Precision Geophysics & Detailed Structural Exploration & Slim Well Drilling Project Type / Topic 1 Recovery Act: Geothermal Technologies Program Project Type / Topic 2 Validation of Innovative Exploration Technologies Project Description Existing geologic data show that the basalt has been broken by complex intersecting fault zones at the hot springs. Natural state hot water flow patterns in the fracture network will be interpreted from temperature gradient wells and then tested with moderate depth core holes. Production and injection well tests of the core holes will be monitored with an innovative combination of Flowing Differential Self-Potential (FDSP) and resistivity tomography surveys. The cointerpretation of all these highly detailed geophysical methods sensitive to fracture permeability patterns and water flow during the well tests will provide unprecedented details on the structures and flow in a shallow geothermal aquifer and support effective development of the low temperature reservoir and identification of deep up flow targets.

25

Future high precision experiments and new physics beyond Standard Model  

SciTech Connect

High precision (< 1%) electroweak experiments that have been done or are likely to be done in this decade are examined on the basis of Standard Model (SM) predictions of fourteen weak neutral current observables and fifteen W and Z properties to the one-loop level, the implications of the corresponding experimental measurements to various types of possible new physics that enter at the tree or loop level were investigated. Certain experiments appear to have special promise as probes of the new physics considered here.

Luo, Mingxing.

1993-01-01T23:59:59.000Z

26

Future high precision experiments and new physics beyond Standard Model  

SciTech Connect

High precision (< 1%) electroweak experiments that have been done or are likely to be done in this decade are examined on the basis of Standard Model (SM) predictions of fourteen weak neutral current observables and fifteen W and Z properties to the one-loop level, the implications of the corresponding experimental measurements to various types of possible new physics that enter at the tree or loop level were investigated. Certain experiments appear to have special promise as probes of the new physics considered here.

Luo, Mingxing

1993-04-01T23:59:59.000Z

27

High-Precision, High-Resolution Measurements of Absorption in the Oxygen A-Band  

Science Conference Proceedings (OSTI)

Issues arising in the application of high-resolution, high-precision spectroscopy to remote sensing are discussed in the context of deriving surface pressure from absorption in the O2 A-band. This application requires spectral resolution ...

D. M. O’Brien; S. A. English; Grant Da Costa

1997-02-01T23:59:59.000Z

28

Instrument calibration using the pneumatic deadweight tester  

SciTech Connect

One of the most difficult problems facing the instrument engineer is the accurate calibration of orifice meters, particularly at remote or inaccessible locations. The object of this paper is to describe a unique solution to this problem, an automatic pneumatic deadweight tester utilizing the floating ball principle. The Ametek Model PK Pneumatic Deadweight Tester is an ideal instrument to use for the calibration of orifice meters. This instrument provides unexcelled accuracy combined with reliable operation and ease of use for both field and laboratory calibration. It has been accepted by most of the gas transmission companies as a pressure standard for meter calibration.

Johnson, E.R.

1984-04-01T23:59:59.000Z

29

HIGH-PRECISION ASTROMETRY WITH A DIFFRACTIVE PUPIL TELESCOPE  

SciTech Connect

Astrometric detection and mass determination of Earth-mass exoplanets require sub-{mu}as accuracy, which is theoretically possible with an imaging space telescope using field stars as an astrometric reference. The measurement must, however, overcome astrometric distortions, which are much larger than the photon noise limit. To address this issue, we propose to generate faint stellar diffraction spikes using a two-dimensional grid of regularly spaced small dark spots added to the surface of the primary mirror (PM). Accurate astrometric motion of the host star is obtained by comparing the position of the spikes to the background field stars. The spikes do not contribute to scattered light in the central part of the field and therefore allow unperturbed coronagraphic observation of the star's immediate surroundings. Because the diffraction spikes are created on the PM and imaged on the same focal plane detector as the background stars, astrometric distortions affect equally the diffraction spikes and the background stars and are therefore calibrated. We describe the technique, detail how the data collected by the wide-field camera are used to derive astrometric motion, and identify the main sources of astrometric error using numerical simulations and analytical derivations. We find that the 1.4 m diameter telescope, 0.3 deg{sup 2} field we adopt as a baseline design achieves 0.2 {mu}as single measurement astrometric accuracy. The diffractive pupil concept thus enables sub-{mu}as astrometry without relying on the accurate pointing, external metrology, or high-stability hardware required with previously proposed high-precision astrometry concepts.

Guyon, Olivier; Eisner, Josh A.; Angel, Roger; Woolf, Neville J. [Steward Observatory, University of Arizona, Tucson, AZ 85721 (United States); Bendek, Eduardo A.; Milster, Thomas D. [College of Optical Sciences, University of Arizona, Tucson, AZ 85721 (United States); Mark Ammons, S. [Lawrence Livermore National Laboratory, Physics Division L-210, 7000 East Ave., Livermore, CA 94550 (United States); Shao, Michael; Shaklan, Stuart; Levine, Marie; Nemati, Bijan [Jet Propulsion Laboratory, 4800 Oak Grove Drive, Pasadena, CA 91109 (United States); Pitman, Joe [Exploration Sciences, P.O. Box 24, Pine, CO 80470 (United States); Woodruff, Robert A. [2081 Evergreen Avenue, Boulder, CO 80304 (United States); Belikov, Ruslan, E-mail: guyon@naoj.org [NASA Ames Research Center, Moffett Field, CA 94035 (United States)

2012-06-01T23:59:59.000Z

30

Argonne CNM Highlight: High density, high-aspect-ratio precision polyimide  

NLE Websites -- All DOE Office Websites (Extended Search)

High density, high-aspect-ratio precision polyimide nanofilters High density, high-aspect-ratio precision polyimide nanofilters Polyimide Nanofilter SEM of a polyimide film with holes ~250 nm in diameter and ~10 µm deep. The cross-sectional cut of the channels in the front are made visible by focused ion-beam milling. Collaborative users from Creatv MicroTech, Inc. and Los Alamos National Laboratory, working with CNM's Nanofabrication & Devices Group, have demonstrated a novel fabrication process that produces high-porosity polymer nanofilters with smooth, uniform. and straight pores and high aspect ratios. Nanofilters have a wide range of applications for various size-exclusion-based separations in bioseparation and nanomedicine, such as laboratory assays, removing bacteria and viruses, drug delivery devices,

31

Ion source for high-precision mass spectrometry  

DOE Patents (OSTI)

The invention is directed to a method for increasing the precision of positive-ion relative abundance measurements conducted in a sector mass spectrometer having an ion source for directing a beam of positive ions onto a collimating slit. The method comprises incorporating in the source an electrostatic lens assembly for providing a positive-ion beam of circular cross section for collimation by the slit.

Todd, Peter J. (Oak Ridge, TN); McKown, Henry S. (Oak Ridge, TN); Smith, David H. (Oak Ridge, TN)

1984-01-01T23:59:59.000Z

32

Lessons Learned from JTA Tester Safety Studies  

SciTech Connect

EP401575, Issue C, calls out a requirement to perform safety studies for testers that are used to accept Joint Test Assembly (JTA) product at Pantex (Reference 1). The underlying motivation is to ensure that personnel hazards due to inadvertent initiation of electro-explosive devices (EEDs) during JTA testing are understood and minimized. Studies have been performed on the B61-7/11 JTA, B61-3/4/10 JTA, B83 JTA, and W76 Type 2F testers at Pantex (References 2-5). Each of these studies includes an examination of the relevant Pantex tester as well as the instrumentation and War Reserve (WR) hardware. In performing these analyses, several themes have emerged that could be useful for the Phase 6.3 design efforts for the weapons, the associated instrumentation, and the JTA testers. This report summarizes the lessons learned from these studies. Note that in some cases, the recommendations provided below to enhance safety during JTA testing operations (e.g., adding isolation resistors in the monitoring lines) may result in a reliability degradation or other surety impact. Thus it is important to consider these lessons learned in the context of the overall design and to make tradeoffs in light of the integrated surety objectives. The lessons learned are listed in five different categories, summarized as: (1) Instrumentation considerations; (2) WR design considerations; (3) Tester considerations; (4) Administrative procedures during JTA assembly; and (5) Administrative procedures prior to and during JTA testing. The first three focus on minimizing the probability of inadvertent application of power to EED initiation lines due to component, connector, and assembly failures. The last two describe procedural steps that can be taken at Pantex to either minimize the risk (e.g., by ensuring that tester power supplies cannot supply excessive power to the unit under test) or to mitigate the consequences of unexpected EED initiation (e.g., by instructing test operators to avoid standing in areas where they could be at risk in the event of EED initiation).

R. L. Bierbaum

2001-05-01T23:59:59.000Z

33

Applied high resolution digital control for universal precision systems  

E-Print Network (OSTI)

This thesis describes the design and characterization of a high-resolution analog interface for dSPACE digital control systems and a high-resolution, high-speed data acquisition and control system. These designs are intended ...

Gawlik, Aaron John

2008-01-01T23:59:59.000Z

34

Mold, flow, and economic considerations in high temperature precision casting  

E-Print Network (OSTI)

Casting high temperature alloys that solidify through a noticeable two phase region, specifically platinum-ruthenium alloys, is a particularly challenging task due to their high melting temperature and this necessitates ...

Humbert, Matthew S

2013-01-01T23:59:59.000Z

35

Experimental Study of Hypernuclei Electroproduction by High Precision Spectroscopy  

SciTech Connect

Jlab experiment E01-011, carried out in 2005 in JLab Hall C, is the second generation of the hypernuclear spectroscopy experiments by the (e,e{prime}K{sup +}) reaction. The (e,e{prime}K{sup +}) reaction is complimentary to the associated production reactions (K{sup -},{pi}{sup -}), ({pi}{sup +},K{sup +}) since, due to a larger momentum transfer to a hyperon, excitations of both spin-non-flip and spin-flip states are possible. The experiment uses high quality and continuous primary electron beam to produce neutron rich hypernuclei on various targets by the electroproduction. The experimental setup consists of splitter magnet, high resolution kaon spectrometer (HKS) and electron spectrometer (Enge) implemented in new configuration, the so called 'Tilt Method'. Production data was taken on multiple targets: CH{sub 2}, {sup 6}Li, {sup 7}Li, {sup 9}Be, {sup 10}B, {sup 12}C and {sup 28}Si. In present study the analysis of CH{sub 2}, {sup 12}C and {sup 28}Si is presented. The elementary processes of p(e,e{prime}K{sup +}){Lambda}/{Sigma} from CH{sup 2} data were used for calibration of the spectrometer optics and kinematics. The hypernuclear spectra of {sup 12}{sub {Lambda}}B was obtained with ground state resolution of 0.47 {+-} 0.07 MeV (FWHM), the best ever achieved. Feasibility of the electroproduction reaction to study medium to heavy targets has been proven with the first high resolution beyond p-shell hypernuclear spectra from {sup 28}{sub {Lambda}}Al hypernuclei. The obtained results of the E01-011 experiment confirmed that hypernuclear spectroscopy by the (e,e{prime}K{sup +}) reaction is a very useful technique.

Tomislav Seva

2009-12-01T23:59:59.000Z

36

Combination spindle-drive system for high precision machining  

DOE Patents (OSTI)

A combination spindle-drive is provided for fabrication of optical quality surface finishes. Both the spindle-and-drive utilize the spindle bearings for support, thereby removing the conventional drive-means bearings as a source of vibration. An airbearing spindle is modified to carry at the drive end a highly conductive cup-shaped rotor which is aligned with a stationary stator to produce torque in the cup-shaped rotor through the reaction of eddy currents induced in the rotor. This arrangement eliminates magnetic attraction forces and all force is in the form of torque on the cup-shaped rotor.

Gerth, Howard L. (Knoxville, TN)

1977-07-26T23:59:59.000Z

37

Precision high energy liner implosion experiments PHELIX [1  

SciTech Connect

This paper describes the hardware design of a small megajoule sized transformer coupled pulse power system utilized to drive hydrodynamic liner experiments with a nominal current capability of 10 megAmperes. The resulting liner velocities and characteristics provide properties of physics interest. The capacitor banks utilize the ''Atlas'' plastic cased 60 kV, 60 kJ capacitors [2] and railgaps [3]. The air insulated marx'S are configured to dive a multi-filar toroidal transformer. The 4:1 multi-filar toroidal transformer is mechanically part of a circular disc line and this feature results in an attractive inductance budget. Because of the compact size, re-usable transformer, and resulting low maintenance cost, shot rates can be high compared to other ''large'' machines or explosively driven hydrodynamic methods. The PHELIX modeling, construction status, and test results will also be provided.

Reass, William A [Los Alamos National Laboratory; Baca, David M [Los Alamos National Laboratory; Griego, Jeffrey R [Los Alamos National Laboratory; Reinovsky, Robert E [Los Alamos National Laboratory; Rousculp, Christopher L [Los Alamos National Laboratory; Turchi, Peter J [Los Alamos National Laboratory

2009-01-01T23:59:59.000Z

38

High-precision position control of a heavy-lift manipulator in a dynamic environment  

E-Print Network (OSTI)

This thesis considers the control of a heavy-lift serial manipulator operating on the deck of a large ocean vessel. This application presents a unique challenge for high- precision control because the system must contend ...

Garretson, Justin R. (Justin Richard)

2005-01-01T23:59:59.000Z

39

Visual Scanning Hartmann Optical Tester (VSHOT) Uncertainty Analysis (Milestone Report)  

DOE Green Energy (OSTI)

In 1997, an uncertainty analysis was conducted of the Video Scanning Hartmann Optical Tester (VSHOT). In 2010, we have completed a new analysis, based primarily on the geometric optics of the system, and it shows sensitivities to various design and operational parameters. We discuss sources of error with measuring devices, instrument calibrations, and operator measurements for a parabolic trough mirror panel test. These help to guide the operator in proper setup, and help end-users to understand the data they are provided. We include both the systematic (bias) and random (precision) errors for VSHOT testing and their contributions to the uncertainty. The contributing factors we considered in this study are: target tilt; target face to laser output distance; instrument vertical offset; laser output angle; distance between the tool and the test piece; camera calibration; and laser scanner. These contributing factors were applied to the calculated slope error, focal length, and test article tilt that are generated by the VSHOT data processing. Results show the estimated 2-sigma uncertainty in slope error for a parabolic trough line scan test to be +/-0.2 milliradians; uncertainty in the focal length is +/- 0.1 mm, and the uncertainty in test article tilt is +/- 0.04 milliradians.

Gray, A.; Lewandowski, A.; Wendelin, T.

2010-10-01T23:59:59.000Z

40

High-precision location and yield of North Korea's 2013 nuclear test Miao Zhang1  

E-Print Network (OSTI)

High-precision location and yield of North Korea's 2013 nuclear test Miao Zhang1 and Lianxing Wen2 Korea's 2009 nuclear test as reference and satellite imagery, we show that the location and yield of North Korea's 2013 nuclear test can be quickly and accurately determined based on seismic data. North

Wen, Lianxing

Note: This page contains sample records for the topic "high precision tester" 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

Optimizing the operating conditions in a high precision industrial process using soft computing techniques  

Science Conference Proceedings (OSTI)

This interdisciplinary research is based on the application of unsupervized connectionist architectures in conjunction with modelling systems and on the determining of the optimal operating conditions of a new high precision industrial process known ... Keywords: exploratory projection pursuit, industrial applications, modelling systems, unsupervized learning

Emilio Corchado; Javier Sedano; Leticia Curiel; José R. Villar

2012-07-01T23:59:59.000Z

42

High-precision measurements of the diamond Hugoniot in and above the melt region  

Science Conference Proceedings (OSTI)

High-precision measurements of the diamond principal Hugoniot have been made at pressures between 6 and 19 Mbar. Shock velocities were determined with 0.3%-1.1% precision using a velocity interferometer. Impedance-matching analysis, incorporating systematic uncertainties in the equation of state of the quartz standard, was used to determine the Hugoniot with 1.2%-2.7% precision in density. The results are in good agreement with published ab initio calculations, which predict a small negative melt slope along the Hugoniot, but disagree with previous laser-driven shock wave experiments, which had observed a large density increase in the melt region. In the extensive solid-liquid coexistence regime between 6 and 10 Mbar, the present measurements indicate that the mixed phase is a few percent more dense than what would be expected from a simple interpolation between liquid and solid Hugoniots.

Hicks, D. G.; Celliers, P. M.; Bradley, D. K.; Eggert, J. H.; Collins, G. W. [Lawrence Livermore National Laboratory, Livermore, California 94550 (United States); Boehly, T. R. [Laboratory for Laser Energetics, University of Rochester, New York 14623 (United States); McWilliams, R. S. [Lawrence Livermore National Laboratory, Livermore, California 94550 (United States); University of California, Berkeley, California 94720 (United States); Jeanloz, R. [University of California, Berkeley, California 94720 (United States)

2008-11-01T23:59:59.000Z

43

High precision measurements of the diamond Hugoniot in and above the melt region  

Science Conference Proceedings (OSTI)

High precision laser-driven shock wave measurements of the diamond principal Hugoniot have been made at pressures between 6 and 19 Mbar. Shock velocities were determined with 0.3-1.1% precision using a velocity interferometer. Impedance matching analysis, incorporating systematic errors in the equation-of-state of the quartz standard, was used to determine the Hugoniot with 1.2-2.7% precision in density. The results are in good agreement with published ab initio calculations which predict a small negative melt slope along the Hugoniot, but disagree with previous laser-driven shock wave experiments which had observed a large density increase in the melt region. In the extensive solid-liquid coexistence regime between 6 and 10 Mbar these measurements indicate that the mixed phase may be slightly more dense than would be expected from a simple interpolation between liquid and solid Hugoniots.

Hicks, D; Boehly, T; Celliers, P; Bradley, D; Eggert, J; McWilliams, R S; Collins, G

2008-08-05T23:59:59.000Z

44

High-precision test of collective versus single-particle motion of protons and neutrons in the  

E-Print Network (OSTI)

High-precision test of collective versus single- particle motion of protons and neutrons in the tin for the nuclear shell model (basic microscopic model of all nuclear theory). · These high-precision results sources: DOE Office of Science, Office of Nuclear Physics Resources: Holifield Radioactive Beam Facility

45

High precision measurements of the neutron spin structure in Hall A at Jlab  

SciTech Connect

Conclusions of this presentation are: (1) JLab energy upgrade will offer new exciting opportunities to study the nucleon (spin) structure such as high precision, unexplored phase space, flavor decomposition; (2) Large technological efforts is in progress to optimally exploit these opportunities; (3) HallA will be the first hall to get the new beam, first experiment expected to run in 2014; (4) A1n likely one of the first experiments to take data in the new 12 GeV era; and (5) SIDIS exp. will follow in couple of years.

Annand, R M; Cates, G; Cisbani, E; Franklin, G B; Liyanage, N; Puckett, A; Rosner, G; Wojtsekhowski, B

2012-04-01T23:59:59.000Z

46

Test Access Mechanism Optimization, Test Scheduling, and Tester Data Volume  

E-Print Network (OSTI)

Test Access Mechanism Optimization, Test Scheduling, and Tester Data Volume Reduction for System Marinissen, Senior Member, IEEE Abstract--We describe an integrated framework for system-on-chip (SOC) test automation. Our framework is based on a new test access mechanism (TAM) architecture consisting of flexible

Chakrabarty, Krishnendu

47

Precision Neutrino Oscillation Measurements using Simultaneous High-Power, Low-Energy Project-X Beams  

E-Print Network (OSTI)

The first phase of the long-baseline neutrino experiment, LBNE10, will use a broadband, high-energy neutrino beam with a 10-kt liquid argon TPC at 1300 km to study neutrino oscillation. In this paper, we describe potential upgrades to LBNE10 that use Project X to produce high-intensity, low-energy neutrino beams. Simultaneous, high-power operation of 8- and 60-GeV beams with a 200-kt water Cerenkov detector would provide sensitivity to nu_mu to nu_e oscillations at the second oscillation maximum. We find that with ten years of data, it would be possible to measure sin2(2theta_13) with precision comparable to that expected from reactor antineutrino disappearance and to measure the value of the CP phase, delta_CP, with an uncertainty of (5-10) degrees. This document is submitted for inclusion in Snowmass 2013.

M. Bishai; M. Diwan; S. Kettell; J. Stewart; R. Tschirhart; B. Viren; L. Whitehead; E. Worcester

2013-07-02T23:59:59.000Z

48

High-precision molecular dynamics simulation of UO2-PuO2: pair potentials comparison  

E-Print Network (OSTI)

Our series of articles is devoted to high-precision molecular dynamics simulation of mixed actinide-oxide (MOX) fuel in the rigid ions approximation using high-performance graphics processors (GPU). In the first article we assess 10 most relevant interatomic sets of pair potentials (SPP) by reproduction of solid phase properties of uranium dioxide (UO2) - temperature dependences of the lattice constant, bulk modulus, enthalpy and heat capacity. Measurements were performed with 1K accuracy in a wide temperature range from 300K up to melting point. The best results are demonstrated by two recent SPPs MOX-07 and Yakub-09, which both had been fitted to the recommended thermal expansion in the range of temperatures 300-3100K. Compared with them, the widely used SPPs Basak-03 and Morelon-03 reproduce the experimental data noticeably worse at temperatures above 2500K.

Potashnikov, S I; Nekrasov, K A; Kupryazhkin, A Ya

2011-01-01T23:59:59.000Z

49

Identifying the sources of subsurface contamination at the Hanford site in Washington using high-precision uranium isotopic measurements  

E-Print Network (OSTI)

J.K. and Cowart, J.B. in Uranium Series Disequilibrium:using High-Precision Uranium Isotopic Measurements John N.groundwater plume of uranium (U) was detected in monitoring

Christensen, John N.; Dresel, P. Evan; Conrad, Mark E.; Maher, Kate; DePaolo, Donald J.

2004-01-01T23:59:59.000Z

50

QCD Precision Measurements and Structure Function Extraction at a High Statistics, High Energy Neutrino Scattering Experiment: NuSOnG  

SciTech Connect

We extend the physics case for a new high-energy, ultra-high statistics neutrino scattering experiment, NuSOnG (Neutrino Scattering On Glass) to address a variety of issues including precision QCD measurements, extraction of structure functions, and the derived Parton Distribution Functions (PDFs). This experiment uses a Tevatron-based neutrino beam to obtain a sample of Deep Inelastic Scattering (DIS) events which is over two orders of magnitude larger than past samples. We outline an innovative method for fitting the structure functions using a parameterized energy shift which yields reduced systematic uncertainties. High statistics measurements, in combination with improved systematics, will enable NuSOnG to perform discerning tests of fundamental Standard Model parameters as we search for deviations which may hint of 'Beyond the Standard Model' physics.

Adams, T.; /Florida State U.; Batra, P.; /Columbia U.; Bugel, Leonard G.; /Columbia U.; Camilleri, Leslie Loris; /Columbia U.; Conrad, Janet Marie; /MIT; de Gouvea, A.; /Northwestern U.; Fisher, Peter H.; /MIT; Formaggio, Joseph Angelo; /MIT; Jenkins, J.; /Northwestern U.; Karagiorgi, Georgia S.; /MIT; Kobilarcik, T.R.; /Fermilab /Texas U.

2009-06-01T23:59:59.000Z

51

High Precision CTE-Measurement of SiC-100 for Cryogenic Space-Telescopes  

E-Print Network (OSTI)

We present the results of high precision measurements of the thermal expansion of the sintered SiC, SiC-100, intended for use in cryogenic space-telescopes, in which minimization of thermal deformation of the mirror is critical and precise information of the thermal expansion is needed for the telescope design. The temperature range of the measurements extends from room temperature down to $\\sim$ 10 K. Three samples, #1, #2, and #3 were manufactured from blocks of SiC produced in different lots. The thermal expansion of the samples was measured with a cryogenic dilatometer, consisting of a laser interferometer, a cryostat, and a mechanical cooler. The typical thermal expansion curve is presented using the 8th order polynomial of the temperature. For the three samples, the coefficients of thermal expansion (CTE), $\\bar{\\alpha}_{#1}$, $\\bar{\\alpha}_{#2}$, and $\\bar{\\alpha}_{#3}$ were derived for temperatures between 293 K and 10 K. The average and the dispersion (1 $\\sigma$ rms) of these three CTEs are 0.816 and 0.002 ($\\times 10^{-6}$/K), respectively. No significant difference was detected in the CTE of the three samples from the different lots. Neither inhomogeneity nor anisotropy of the CTE was observed. Based on the obtained CTE dispersion, we performed an finite-element-method (FEM) analysis of the thermal deformation of a 3.5 m diameter cryogenic mirror made of six SiC-100 segments. It was shown that the present CTE measurement has a sufficient accuracy well enough for the design of the 3.5 m cryogenic infrared telescope mission, the Space Infrared telescope for Cosmology and Astrophysics (SPICA).

K. Enya; N. Yamada; T. Onaka; T. Nakagawa; H. Kaneda; M. Hirabayashi; Y. Toulemont; D. Castel; Y. Kanai; N. Fujishiro

2007-04-12T23:59:59.000Z

52

High-precision diode-laser-based temperature measurement for air refractive index compensation  

Science Conference Proceedings (OSTI)

We present a laser-based system to measure the refractive index of air over a long path length. In optical distance measurements, it is essential to know the refractive index of air with high accuracy. Commonly, the refractive index of air is calculated from the properties of the ambient air using either Ciddor or Edlen equations, where the dominant uncertainty component is in most cases the air temperature. The method developed in this work utilizes direct absorption spectroscopy of oxygen to measure the average temperature of air and of water vapor to measure relative humidity. The method allows measurement of temperature and humidity over the same beam path as in optical distance measurement, providing spatially well-matching data. Indoor and outdoor measurements demonstrate the effectiveness of the method. In particular, we demonstrate an effective compensation of the refractive index of air in an interferometric length measurement at a time-variant and spatially nonhomogeneous temperature over a long time period. Further, we were able to demonstrate 7 mK RMS noise over a 67 m path length using a 120 s sample time. To our knowledge, this is the best temperature precision reported for a spectroscopic temperature measurement.

Hieta, Tuomas; Merimaa, Mikko; Vainio, Markku; Seppae, Jeremias; Lassila, Antti

2011-11-01T23:59:59.000Z

53

HIGH-POWER PRECISION CURRENT SUPPLY IST2-1000M FOR ELEMENTS OF MAGNETIC SYSTEMS OF ACCELERATORS AND  

E-Print Network (OSTI)

BF), a detached supply transformer and power switch. Power box PB comprises the following: - a threeHIGH-POWER PRECISION CURRENT SUPPLY IST2-1000M FOR ELEMENTS OF MAGNETIC SYSTEMS OF ACCELERATORS. These supplies are intended to power magnetic systems of accelerators, requiring high stability and low ripples

Kozak, Victor R.

54

High precision thermal stress study on flip chips by synchrotron polychromatic x-ray microdiffraction  

E-Print Network (OSTI)

Figure captions: Figure 1 (a) Flip chip sample attached onReferences : [1] J. H. Lau, Flip Chip Technologies , McGraw-precision thermal stress study on flip chips by synchrotron

Chen, Kai

2010-01-01T23:59:59.000Z

55

Precision control of high temperature furnaces using an auxiliary power supply and charged particle current flow  

DOE Patents (OSTI)

Two power supplies are combined to control a furnace. A main power supply heats the furnace in the traditional manner, while the power from the auxiliary supply is introduced as a current flow through charged particles existing due to ionized gas or thermionic emission. The main power supply provides the bulk heating power and the auxiliary supply provides a precise and fast power source such that the precision of the total power delivered to the furnace is improved. 5 figs.

Pollock, G.G.

1997-01-28T23:59:59.000Z

56

Precision control of high temperature furnaces using an auxiliary power supply and charged practice current flow  

DOE Patents (OSTI)

Two power supplies are combined to control a furnace. A main power supply heats the furnace in the traditional manner, while the power from the auxiliary supply is introduced as a current flow through charged particles existing due to ionized gas or thermionic emission. The main power supply provides the bulk heating power and the auxiliary supply provides a precise and fast power source such that the precision of the total power delivered to the furnace is improved.

Pollock, George G. (San Ramon, CA)

1997-01-01T23:59:59.000Z

57

NETL: Methane Hydrates - ANS Research Project - Modular Dynamics Tester  

NLE Websites -- All DOE Office Websites (Extended Search)

Well Well Modular Formation Dynamics Tester (MDT) Tool The scientific plan for the Mt. Elbert Prospect includes multiple tests using SchlumbergerÂ’s Modular Formation Dynamics Tester (MDT) tool. This device is deployed on wireline and will be used to sample formation fluids, and measure formation pressure and permeability. The toolÂ’s design involves extension of a sampling probe pad against the borehole wall by backup pistons and the insertion of a smaller test probe a small distance into the formation. The probe is then opened to a sampling chamber within the tool, where fluids from the formation can flow, free of contamination by the borehole fluid. The formation pressure is measured using an extremely accurate gauge that can resolve small pressure differences. The pressure and the rate of fluid flow into the sample chamber can be used to calculate reservoir permeability. Multiple probes can also be used to determine both vertical and horizontal permeability data, which can be used to assess near-wellbore permeability anisotropy (i.e., the degree to which vertical and horizontal permeability within the same reservoir differ). All of these data are useful to engineers interested in predicting the productive capability of a reservoir. Various configurations of the MDT tool can be used to accomplish specific testing goals.

58

Investigation of high-precision {Lambda} hypernuclear spectroscopy via the (e,e'K{sup +}) reaction  

SciTech Connect

The study of {Lambda} hypernuclear structure is very interesting in point of the understanding of the interaction between {Lambda} and nucleon ({Lambda}-N interaction) and its ?strange? structure itself due to the containment of a {Lambda} hyperon which has a strangeness as a new degree of freedom. In the several way to study the Lamda hypernuclei, the (e,e'K{sup +}) reaction spectroscopy is a powerful tool for the precise investigation of {Lamda} hypernuclear structure. The purpose of the preset thesis is the establishment of the experimental design with the efficient data analysis method for the (e,e'K{sup +}) hypernuclear spectroscopic experiment in the wide mass region (from A=7 to A=52). It is very challenging to perform the (e,e'K{sup +}) spectroscopic experiment with such a heavy target, because of the huge electron background due to the bremsstrahlung process. In the experiment, it is required to obtain the necessary hypernuclear yield, suppressing the background event ratio. We achieved these requirements by newly constructing the high resolution electron spectrometer (HES) and splitter magnet (SPL) dedicated to the (e,e'K{sup +}) spectroscopic experiment. The HES consists of two quadrupole magnets and a dipole magnets (Q-Q-D) with a momentum resolution of dp/p = 3x10^-4 at p = 0.84 GeV/c. It was used being vertically tilted by 6.5 degree so as to optimize signal to noise ratio and hypernuclear yield. The SPL is a dipole magnet. The experimental target was placed at the entrance of this magnet. The role of the SPL is to separate four kind of particles; scattered kaons, photons created by the bremsstrahlung, the post beam and scattered electrons. In addition, since the SPL is a part of the kaon and electron spectrometers. We designed the magnet shape carefully considering these points. The experiment was performed with 2.344 GeV/c electron beam from CEBAF at Jefferson Lab. The experimental setup consists of the HES, SPL and HKS (high momentum resolution kaon spectrometer). The HKS is also a Q-Q-D type spectrometer with the momentum resolution of dp/p = 2x10^-4 at p = 1.2 GeV/c. In the data analysis, the particle momentum calibration was the most important procedure. At the initial point, the particle momentum was obtained from the calculated magnetic field map of the spectrometer whose accuracy is an order of 10^-2. The initial momentum was calibrated by two step, the the magnetic field map improvement and the calibration with known masses of {Lambda}/{Sigma}{sup 0} which were observed by the CH{sub 2} target data. As a result of the calibration, the momentum resolutions of HKS and HES were estimated as 4x10^-4 and 6x10^-4, respectively. Though these values are the double of the designed value, it was achieved to obtain the {Lambda}/{Sigma}{sup 0} peaks with the same order of the designed energy from the original calculated magnetic field. The cross section was calculated with the several estimated factors. The averaged p({gamma}*, K{sup +}){Lamda} cross section in the HKS acceptance, (0.90 < cos({theta}^CM_K{sup +}) < 1.0) was calculated as 227 ± 12 ±26 [nb/sr], which is consistent within the error bar with the other experiment results of p({gamma}, K{sup +}){Lamda}. The obtained yield of the peak was almost same as the designed value with the considered detector efficiencies. The observed hypernuclear spectrum of ^12_{Lambda} B was also consistent with the other experimental results. These analysis result represents that the experimental setup including the newly constructed HES and SPL worked and the calibration procedure of this unique experimental setup is basically established.

Kawama, Daisuke

2012-03-31T23:59:59.000Z

59

Development of a Manufacturing Process for High-Precision Cu EOS Targets  

SciTech Connect

This document describes the development of a manufacturing process and the production of Cu EOS targets. The development of a manufacturing process for these targets required a great deal of research, because the specifications for the targets required a level of precision an order of magnitude beyond Target Fabrication's capabilities at the time. Strict limitations on the dimensions of the components and the interfaces between them required research efforts to develop bonding and deposition processes consistent with a manufacturing plan with a dimensional precision on the order of 0.1 {micro}m. Several months into this effort, the specifications for the targets were relaxed slightly as a result of discussions between the Target Fabrication Group and the physicists. The level of precision required for these targets remained an order of magnitude beyond previous capabilities, but the changes made it possible to manufacture targets to the specifications. The development efforts and manufacturing processes described in this document successfully produced a complete Cu EOS target that satisfied all of the fabrication and metrology specifications.

Bono, M J; Castro, C; Hibbard, R L

2006-01-12T23:59:59.000Z

60

Trapdoor security in a searchable public-key encryption scheme with a designated tester  

Science Conference Proceedings (OSTI)

We study a secure searchable public-key encryption scheme with a designated tester (dPEKS). The contributions of this paper are threefold. First, we enhance the existing security model to incorporate the realistic abilities of dPEKS attackers. Second, ... Keywords: Data security, Designated tester, Keyword search on encrypted data

Hyun Sook Rhee; Jong Hwan Park; Willy Susilo; Dong Hoon Lee

2010-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "high precision tester" 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

Field Demonstration of the EPRI Resin Tester: Prototype Development and Initial Field Usage  

Science Conference Proceedings (OSTI)

This report presents an update on development of the EPRI Resin Tester, a device designed to assess ion exchange resin kinetics and for other resin testing procedures. The report includes information on fabrication and initial operational testing of the first working prototype of the tester device.

2004-12-21T23:59:59.000Z

62

The Ramsey method in high-precision mass spectrometry with Penning traps: Experimental results  

E-Print Network (OSTI)

The highest precision in direct mass measurements is obtained with Penning trap mass spectrometry. Most experiments use the interconversion of the magnetron and cyclotron motional modes of the stored ion due to excitation by external radiofrequency-quadrupole fields. In this work a new excitation scheme, Ramsey's method of time-separated oscillatory fields, has been successfully tested. It has been shown to reduce significantly the uncertainty in the determination of the cyclotron frequency and thus of the ion mass of interest. The theoretical description of the ion motion excited with Ramsey's method in a Penning trap and subsequently the calculation of the resonance line shapes for different excitation times, pulse structures, and detunings of the quadrupole field has been carried out in a quantum mechanical framework and is discussed in detail in the preceding article in this journal by M. Kretzschmar. Here, the new excitation technique has been applied with the ISOLTRAP mass spectrometer at ISOLDE/CERN for mass measurements on stable as well as short-lived nuclides. The experimental resonances are in agreement with the theoretical predictions and a precision gain close to a factor of four was achieved compared to the use of the conventional excitation technique.

S. George; K. Blaum; F. Herfurth; A. Herlert; M. Kretzschmar; S. Nagy; S. Schwarz; L. Schweikhard; C. Yazidjian

2007-01-22T23:59:59.000Z

63

A High Precision Reactor Neutrino Detector for the Double Chooz Experiment  

E-Print Network (OSTI)

Double Chooz is a reactor neutrino experiment which investigates the last neutrino mixing angle; theta-13. It is necessary to measure reactor neutrino disappearance with precision 1% or better to detect finite value of theta-13. This requirement is the most strict compared to other reactor neutrino experiments performed so far. The Double Chooz experiment makes use of a number of techniques to reduce the possible errors to achieve the sensitivity. The detector is now under construction and it is expected to take first neutrino data in 2009 and to measure sin^22theta-13 with a sensitivity of 0.03 (90%C.L.) In this proceedings, the technical concepts of Double Chooz detector are explained stressing on how it copes with the systematic errors.

Fumihiko Suekane; for the Double Chooz Collaboration

2009-06-09T23:59:59.000Z

64

A7: On-the-fly System Design for High Precision/Ultra Fast/Wide ...  

Science Conference Proceedings (OSTI)

The ultra-high speed laser scanner system is limited by its size of scanning area, for ... via a New Bi-layer Curvature Relaxation Measurement Technique.

65

NPS-SCAT electrical power system ; Naval Postgraduate School Solar Cell Array Tester .  

E-Print Network (OSTI)

??The Naval Postgraduate School Solar Cell Array Tester (NPS-SCAT) seeks to expand the CubeSat knowledge base and provide learning possibilities at the Naval Postgraduate School.… (more)

Dorn, Lawrence Tyrone.

2009-01-01T23:59:59.000Z

66

Modeling the Fuel Spray and Combustion Process of the Ignition Quality Tester with KIVA-3V  

DOE Green Energy (OSTI)

Discusses the use of KIVA-3V to develop a model that reproduces ignition behavior inside the Ignition Quality Tester, which measures the ignition delay of low-volatility fuels.

Bogin, G. E. Jr.; DeFilippo, A.; Chen, J. Y.; Chin, G.; Luecke, J.; Ratcliff, M. A.; Zigler, B. T.; Dean, A. M.

2010-05-01T23:59:59.000Z

67

Fabrication of precision high quality facets on molecular beam epitaxy material  

DOE Patents (OSTI)

Fabricating mirrored vertical surfaces on semiconductor layered material grown by molecular beam epitaxy (MBE). Low energy chemically assisted ion beam etching (CAIBE) is employed to prepare mirrored vertical surfaces on MBE-grown III-V materials under unusually low concentrations of oxygen in evacuated etching atmospheres of chlorine and xenon ion beams. UV-stabilized smooth-surfaced photoresist materials contribute to highly vertical, high quality mirrored surfaces during the etching.

Petersen, Holly E. (Tracy, CA); Goward, William D. (Antioch, CA); Dijaili, Sol P. (Moraga, CA)

2001-01-01T23:59:59.000Z

68

Influence of a high vacuum on the precise positioning using an ultrasonic linear motor  

Science Conference Proceedings (OSTI)

This paper presents an investigation of the ultrasonic linear motor stage for use in a high vacuum environment. The slider table is driven by the hybrid bolt-clamped Langevin-type ultrasonic linear motor, which is excited with its different modes of natural frequencies in both lateral and longitudinal directions. In general, the friction behavior in a vacuum environment becomes different from that in an environment of atmospheric pressure and this difference significantly affects the performance of the ultrasonic linear motor. In this paper, to consistently provide stable and high power of output in a high vacuum, frequency matching was conducted. Moreover, to achieve the fine control performance in the vacuum environment, a modified nominal characteristic trajectory following control method was adopted. Finally, the stage was operated under high vacuum condition, and the operating performances were investigated compared with that of a conventional PI compensator. As a result, robustness of positioning was accomplished in a high vacuum condition with nanometer-level accuracy.

Kim, Wan-Soo; Lee, Dong-Jin; Lee, Sun-Kyu [School of Mechatronics, Gwangju Institute of Science and Technology, 1 Oryong-dong, Buk-gu, Gwangju 500-712 (Korea, Republic of)

2011-01-15T23:59:59.000Z

69

Precision Mining  

NLE Websites -- All DOE Office Websites (Extended Search)

Precision Mining Precision Mining Double Beta Decay Dark Matter Biology Repository Science Renewable Energy Precision Mining at WIPP is Routine All tunnels that make up the WIPP underground are mined with the same precision that is exhibited in this photo. Typical drift cross sections are about 8m x 4m. Custom excavation and maintenance of openings of any configuration can be made. In 2005, WIPP completed renovations to the 6,000 cubic meter North Experimental Area (NExA). The area, located at the northern end of the mine, was refurbished through rib trimming, floor grading, removal of loose muck, ground support and restoration of basic lighting and mine communications. As of 2010, the NExA is used for the Enriched Xenon Observatory (EXO), the Dark Matter Time Projection Chamber (DMTPC)

70

Challenges for the vehicle tester in characterizing hybrid electric vehicles  

DOE Green Energy (OSTI)

Many problems are associated with applying test methods, like the Federal Test Procedure (FTP), for HEVs. Although there has been considerable progress recently in the area of HEV test procedure development, many challenges are still unsolved. A major hurdle to overcoming the challenges of developing HEV test procedures is the lack of HEV designs available for vehicle testing. Argonne National Laboratory has tested hybrid electric vehicles (HEVs) built by about 50 colleges and universities from 1994 to 1997 in annual vehicle engineering competitions sponsored in part by the U.S. Department of Energy (DOE). From this experience, the Laboratory has gathered information about the basics of HEV testing and issues important to successful characterization of HEVs. A collaboration between ANL and the Society of Automotive Engineer`s (SAE) HEV Test Procedure Task Force has helped guide the development of test protocols for their proposed procedures (draft SAE J1711) and test methods suited for DOE vehicle competitions. HEVs use an electrical energy storage device, which requires that HEV testing include more time and effort to deal with the effects of transient energy storage as the vehicle is operating in HEV mode. HEV operation with electric-only capability can be characterized by correcting the HEV mode data using results from electric-only operation. HEVs without electric-only capability require multiple tests conducted to form data correlations that enable the tester to find the result that corresponds to a zero net change in SOC. HEVs that operate with a net depletion of charge cannot be corrected for battery SOC and are characterized with emissions and fuel consumption results coupled with the electrical energy usage rate. 9 refs., 8 figs.

Duoba, M.

1997-08-01T23:59:59.000Z

71

High-precision molecular dynamics simulation of UO2-PuO2: superionic transition in uranium dioxide  

E-Print Network (OSTI)

Our series of articles is devoted to high-precision molecular dynamics simulation of mixed actinide-oxide (MOX) fuel in the rigid ions approximation using high-performance graphics processors (GPU). In this article we assess the 10 most relevant interatomic sets of pair potential (SPP) by reproduction of the Bredig superionic phase transition (anion sublattice premelting) in uranium dioxide. The measurements carried out in a wide temperature range from 300K up to melting point with 1K accuracy allowed reliable detection of this phase transition with each SPP. The {\\lambda}-peaks obtained are smoother and wider than it was assumed previously. In addition, for the first time a pressure dependence of the {\\lambda}-peak characteristics was measured, in a range from -5 GPa to 5 GPa its amplitudes had parabolic plot and temperatures had linear (that is similar to the Clausius-Clapeyron equation for melting temperature).

Potashnikov, S I; Nekrasov, K A; Kupryazhkin, A Ya

2011-01-01T23:59:59.000Z

72

High-Precision Cross Sections for Low-Energy Electron-Atom Collisions  

Science Conference Proceedings (OSTI)

We describe a recently developed B-spline R-matrix method for electron and photon collisions with atoms and ions. Using non-orthogonal sets of orbitals to construct the target description and to represent the scattering functions, this implementation of the close-coupling approach allows us to employ highly correlated target wavefunctions with relatively small configuration expansions. Example results from recent applications of the method for accurate calculations of low-energy electron scattering from He, Zn, Ne, Ar, Xe, and Fe+ are presented.

Bartschat, Klaus; Zatsarinny, Oleg [Department of Physics and Astronomy, Drake University, Des Moines, Iowa 50311 (United States)

2007-04-06T23:59:59.000Z

73

Electrolytic In-process Dressing (ELID) for high-efficiency, precision grinding of ceramic parts: An experiment study  

SciTech Connect

This report describes Electrolytic In-process Dressing (ELID) as applied to the efficient, high-precision grinding of structural ceramics, and describes work performed jointly by Dr. B.P. Bandyopadhyay, University of North Dakota, and Dr. R. Ohmori, of the Institute of Physical and Chemical Research (RINEN), Tokyo, Japan, from June through August, 1994. Dr. Ohmori pioneered the novel ELID grinding technology which incorporates electrolytically enhanced, in-process dressing of metal bonded superabrasive wheels. The principle of ELID grinding technology is discussed in the report as will its application for rough grinding and precision grinding. Two types of silicon nitride based ceramics (Kyocerals Si{sub 3}N{sub 4}, and Eaton`s SRBSN) were ground under various conditions with ELID methods. Mirror surface finishes were obtained with {number_sign} 4000 mesh size wheel (average grain size = 4 {mu}m). Results of these investigations are presented in this report. These include the effects of wheel bond type, type of power supply, abrasive grit friability, and cooling fluid composition. The effects of various parameters are discussed in terms of the mechanisms of ELID grinding, and in particular, the manner of boundary layer formation on the wheels and abrasive grit protrusion.

Bandyopadhyay, B.P.

1995-08-01T23:59:59.000Z

74

High Precision Long-Term Monitoring of Radiatively Active and Related Trace Gases at Surface Sites and from Aircraft in the Southern Hemisphere Atmosphere  

Science Conference Proceedings (OSTI)

Routine high precision measurements of atmospheric CO2, CH4, CO, H2, N2O, and CO2 stable isotopes are conducted by CSIRO (Commonwealth Scientific and Industrial Research Organisation, Australia). Of particular relevance to global monitoring of ...

R. J. Francey; L. P. Steele; R. L. Langenfelds; B. C. Pak

1999-01-01T23:59:59.000Z

75

High precision $^{113}$In($?,?$)$^{113}$In elastic scattering at energies around the Coulomb barrier for the astrophysical $?$ process  

E-Print Network (OSTI)

The $\\gamma$ process in supernova explosions is thought to explain the origin of proton-rich isotopes between Se and Hg, the so-called $p$ nuclei. The majority of the reaction rates for $\\gamma$ process reaction network studies has to be predicted in Hauser-Feshbach statistical model calculations using global optical potential parameterizations. While the nucleon+nucleus optical potential is fairly known, for the $\\alpha$+nucleus optical potential several different parameterizations exist and large deviations are found between the predictions calculated using different parameter sets. By the measurement of elastic $\\alpha$-scattering angular distributions at energies around the Coulomb barrier a comprehensive test for the different global $\\alpha$+nucleus optical potential parameter sets is provided. Between 20$^{\\circ}$ and 175$^{\\circ}$ complete elastic alpha scattering angular distributions were measured on the $^{113}$In \\textit{p} nucleus with high precision at E$_{c.m.}$ = 15.59 and 18.82 MeV. The elastic scattering cross sections of the $^{113}$In($\\alpha$,$\\alpha$)$^{113}$In reaction were measured for the first time at energies close to the astrophysically relevant energy region. The high precision experimental data were used to evaluate the predictions of the recent global and regional $\\alpha$+nucleus optical potentials. Parameters for a local $\\alpha$+nucleus optical potential were derived from the measured angular distributions. Predictions for the reaction cross sections of $^{113}$In($\\alpha,\\gamma$)$^{117}$Sb and $^{113}$In($\\alpha$,n)$^{116}$Sb at astrophysically relevant energies were given using the global and local optical potential parameterizations.

G. G. Kiss; P. Mohr; Zs. Fülöp; T. Rauscher; Gy. Gyürky; T. Szücs; Z. Halász; E. Somorjai; A. Ornelas; C. Yalcin; R. T. Güray; N. Özkan

2013-11-02T23:59:59.000Z

76

The precise determination of mass through the oscillations of a very high-Q superconductor oscillating system  

E-Print Network (OSTI)

The present paper is based upon the fact that if an object is part of a highly stable oscillating system, it is possible to obtain an extremely precise measure for its mass in terms of the energy trapped in this resonance. The subject is timely since there is great interest in Metrology on the establishment of a new electronic standard for the kilogram. Our contribution to such effort includes both the proposal of an alternative definition for mass in terms of energy, as well as the description of a realistic experimental system in which this definition might actually be applied. The setup consists of an oscillating type-II superconducting loop (the SEO system) subjected to the gravity and magnetic fields. The system is shown to be able to reach a dynamic equilibrium by trapping energy up to the point it levitates against the surrounding magnetic and gravitational fields, behaving as an extremely high-Q spring-load system. The proposed energy-mass equation applied to the electromechanical oscillating system eventually produces a new experimental relation between mass and standardized constants.

Osvaldo F. Schilling

2013-08-29T23:59:59.000Z

77

High precision trace element and organic constituent analysis of oil shale and solvent-refined coal materials  

DOE Green Energy (OSTI)

The application of a number of sensitive and precise methods for the determination of trace elements, heavy element species and organic compounds in materials from an oil shale research retort process and from a solvent-refined coal pilot plant operation are discussed. The methods were chosen both for their sensitivity, and also for their relative freedom from interference effects. Coal liquids contain much higher concentrations of aromatic compounds, including polynuclear aromatic hydrocarbons (PNA's). A larger relative fraction of the pna's in shale oil are alkyl substituted. Coal liquids are also considerably higher in phenols (28 percent) than is shale oil (2 percent). N-heterocyclics are present in higher concentration (greater than 8 percent) in shale oil due to the high nitrogen content of the raw shale. Hydroaromatics are common in coal liquids but negligible in shale oil. Inorganic elements and speciation measurements indicate significant amounts of the toxic heavy elements Hg, As, Zn, and Se in effluent oil water and gas streams. In addition, the process water contains significant Co, Br, Sb, and U. Raw oil shale is highly enriched in Se, As and Sb and somewhat enriched in U, Pb, Cs, Hg and Zn. Solvent-refined coal liquids were found to be relatively low in most trace elements. The majority of trace elements are concentrated by the process into the mineral residue. Only Br and Hg are not depleted in solvent-refined coal. Other trace elements still remaining in significant amounts are U, Ta, Cr, and Zn.

Fruchter, J.S.; Petersen, M.R.; Laul, J.C.; Ryan, P.W.

1976-11-01T23:59:59.000Z

78

Multiplication acceleration through twin precision  

Science Conference Proceedings (OSTI)

We present the twin-precision technique for integer multipliers. The twin-precision technique can reduce the power dissipation by adapting a multiplier to the bitwidth of the operands being computed. The technique also enables an increased computational ... Keywords: Baugh-Wooley multiplier, SIMD, area efficient, high speed, lowpower, modified-booth multiplier, twin-precision

Magnus Själander; Per Larsson-Edefors

2009-09-01T23:59:59.000Z

79

Video Scanning Hartmann Optical Tester (VSHOT) Uncertainty Analysis: Preprint  

DOE Green Energy (OSTI)

This purely analytical work is based primarily on the geometric optics of the system and shows sensitivities to various design and operational parameters. We discuss sources of error with measuring devices, instrument calibrations, and operator measurements for a parabolic trough test. In this paper, we include both the random (precision) and systematic (bias) errors for VSHOT testing and their contributions to the uncertainty. The contributing factors that we considered in this study are target tilt, target face to laser output distance, instrument vertical offset, scanner tilt, distance between the tool and the test piece, camera calibration, and scanner/calibration.

Lewandowski, A.; Gray, A.

2010-10-01T23:59:59.000Z

80

TOPIC: Shale Gas Emissions w/David Allen, Energy Institute HOST: Jeff Tester and Todd Cowen  

E-Print Network (OSTI)

TOPIC: Shale Gas Emissions w/David Allen, Energy Institute HOST: Jeff Tester and Todd Cowen DATE fracturing of shale formations (shale gas) is projected by the Energy Information Administration to become the nation's energy landscape. However, the environmental impacts associated with ``fracking'' for shale gas

Angenent, Lars T.

Note: This page contains sample records for the topic "high precision tester" 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

Targets for Precision Measurements  

E-Print Network (OSTI)

The general properties needed in targets (sources) for high precision, high accuracy measurements are reviewed. The application of these principles to the problem of developing targets for the Fission TPC is described. Longer term issues, such as the availability of actinide materials, improved knowledge of energy losses and straggling and the stability of targets during irradiation are also discussed.

W. Loveland; L. Yao; David M. Asner; R. G. Baker; J. Bundgaard; E. Burgett; M. Cunningham; J. Deaven; D. L. Duke; U. Greife; S. Grimes; M. Heffer; T. Hill; D. Isenhower; J. L. Klay; V. Kleinrath; N. Kornilov; A. B. Laptev; T. N. Massey; R. Meharchand; H. Qu; J. Ruz; S. Sangiorgio; B. Selhan; L. Snyder; S. Stave; G. Tatishvili; R. T. Thornton; F. Tovesson; D. Towell; R. S. Towell; S. Watson; B. Wendt; L. Wood

2013-03-09T23:59:59.000Z

82

Precision electron polarimetry  

SciTech Connect

A new generation of precise Parity-Violating experiments will require a sub-percent accuracy of electron beam polarimetry. Compton polarimetry can provide such accuracy at high energies, but at a few hundred MeV the small analyzing power limits the sensitivity. M{\\o}ller polarimetry provides a high analyzing power independent on the beam energy, but is limited by the properties of the polarized targets commonly used. Options for precision polarimetry at ~300 MeV will be discussed, in particular a proposal to use ultra-cold atomic hydrogen traps to provide a 100\\%-polarized electron target for M{\\o}ller polarimetry.

Chudakov, Eugene A. [JLAB

2013-11-01T23:59:59.000Z

83

Design and control of a linear bearing durability tester  

E-Print Network (OSTI)

In order to better understand the characteristics of linear bearings under high load and high speed conditions, a machine capable of testing bearings under these conditions was created. The machine is flexible in its design, ...

Pope, Benjamin J

2008-01-01T23:59:59.000Z

84

Microsoft PowerPoint - High Temperature Thermoelectric_Ohuchi  

NLE Websites -- All DOE Office Websites (Extended Search)

High T Seebeck tester *Nano-Micro Composites * Reduction in grain size adversely affects electron mobility * Research into nano-micro composites to scatter phonons and preserve...

85

Toward high-precision values of the self energy of non-S states in hydrogen and hydrogen-like ions  

E-Print Network (OSTI)

The method and status of a study to provide numerical, high-precision values of the self-energy level shift in hydrogen and hydrogen-like ions is described. Graphs of the self energy in hydrogen-like ions with nuclear charge number between 20 and 110 are given for a large number of states. The self-energy is the largest contribution of Quantum Electrodynamics (QED) to the energy levels of these atomic systems. These results greatly expand the number of levels for which the self energy is known with a controlled and high precision. Applications include the adjustment of the Rydberg constant and atomic calculations that take into account QED effects.

Eric-Olivier Le Bigot; Ulrich D. Jentschura; Paul Indelicato; Peter J. Mohr

2004-10-14T23:59:59.000Z

86

Precision powder feeder  

DOE Patents (OSTI)

A new class of precision powder feeders is disclosed. These feeders provide a precision flow of a wide range of powdered materials, while remaining robust against jamming or damage. These feeders can be precisely controlled by feedback mechanisms.

Schlienger, M. Eric (Albuquerque, NM); Schmale, David T. (Albuquerque, NM); Oliver, Michael S. (Sandia Park, NM)

2001-07-10T23:59:59.000Z

87

Prospective Assessment of Patterns of Failure After High-Precision Definitive (Chemo)Radiation in Head-and-Neck Squamous Cell Carcinoma  

Science Conference Proceedings (OSTI)

Purpose: To prospectively analyze patterns of failure in patients with head-and-neck squamous cell carcinoma treated with definitive high-precision radiotherapy with a focus on location of failure relative to target volume coverage. Methods and Materials: Sixty patients treated with three-dimensional conformal radiotherapy or intensity-modulated radiation therapy were included. Locoregional failure volume was defined on the planning data set at relapse, and dose received was analyzed by use of dose-volume histograms. Results: Thirteen patients were deemed to have had locoregional failures, of which two did not have any viable tumor on salvage neck dissection, leaving eleven patients with proven persistent or recurrent locoregional disease. Of these, 9 patients had in-field failure, 1 marginal failure, and 1 both in-field and marginal failures. Overall, only 2 of 11 patients (18%) with relapse had any marginal failure. Of the 20 sites of locoregional failure, 15 (75%) were in-field and 5 (25%) marginal. Distant metastases were detected in 3 patients, whereas a second new primary developed in 3 others. With a median follow-up of 26 months (interquartile range, 18-31 months) for surviving patients, the 3-year local control, locoregional control, disease-free survival, and overall survival rates were 75.3%, 74%, 67.2%, and 60.5%, respectively. Conclusions: Locoregional relapse remains the predominant pattern of failure in head-and-neck squamous cell carcinoma treated with high-precision definitive radiotherapy with the majority of failures occurring 'in-field' within the high-dose volume. Marginal failures can occur, particularly in the vicinity of the spared parotid gland. The therapeutic index of high-precision conformal radiotherapy is largely dependent on adequate selection and delineation of target volumes and organs at risk.

Gupta, Tejpal, E-mail: tejpalgupta@rediffmail.co [Department of Radiation Oncology, Advanced Centre for Treatment Research and Education in Cancer/Tata Memorial Hospital, Tata Memorial Centre, Mumbai (India); Jain, Sandeep; Agarwal, Jai Prakash; Ghosh-Laskar, Sarbani; Phurailatpam, Reena; Pai-Shetty, Rajershi; Dinshaw, Ketayun A. [Department of Radiation Oncology, Advanced Centre for Treatment Research and Education in Cancer/Tata Memorial Hospital, Tata Memorial Centre, Mumbai (India)

2011-06-01T23:59:59.000Z

88

High-precision measurements of the equation of state of hydrocarbons at 1-10 Mbar using laser-driven shock waves  

Science Conference Proceedings (OSTI)

The equation of state (EOS) of polystyrene and polypropylene were measured using laser-driven shock waves with pressures from 1 to 10 Mbar. Precision data resulting from the use of alpha-quartz as an impedance-matching (IM) standard tightly constrains the EOS of these hydrocarbons, even with the inclusion of systematic errors inherent to IM. The temperature at these high pressures was measured, which, combined with kinematic measurements, provide a complete shock EOS. Both hydrocarbons were observed to reach similar compressions and temperatures as a function of pressure. The materials were observed to transition from transparent insulators to reflecting conductors at pressures of 1 to 2 Mbar.

Barrios, M. A.; Meyerhofer, D. D. [Laboratory for Laser Energetics, University of Rochester, 250 East River Road, Rochester, New York 14623-1299 (United States); Department of Physics and Astronomy, University of Rochester, 250 East River Road, Rochester, New York 14623-1299 (United States); Hicks, D. G.; Eggert, J. H.; Celliers, P. M.; Collins, G. W. [Lawrence Livermore National Laboratory, Livermore, California 94550 (United States); Boehly, T. R.; Fratanduono, D. E. [Laboratory for Laser Energetics, University of Rochester, 250 East River Road, Rochester, New York 14623-1299 (United States)

2010-05-15T23:59:59.000Z

89

Statistical considerations in high precision U-Pb geochronology, with an application to the tectonic evolution of the North Cascades, Washington  

E-Print Network (OSTI)

The range of geologic problems that may be addressed by U-Pb geochronology is governed by the precision to which U-Pb dates can be measured, expressed as their estimated uncertainties. Accurate and precise knowledge of ...

McLean, Noah Morgan

2012-01-01T23:59:59.000Z

90

The CRIRES Search for Planets Around the Lowest-Mass Stars. I. High-Precision Near-Infrared Radial Velocities with an Ammonia Gas Cell  

E-Print Network (OSTI)

Radial velocities measured from near-infrared spectra are a potentially powerful tool to search for planets around cool stars and sub-stellar objects. However, no technique currently exists that yields near-infrared radial velocity precision comparable to that which is routinely obtained in the visible. We describe a method for measuring high-precision relative radial velocities of cool stars from K-band spectra. The method makes use of a glass cell filled with ammonia gas to calibrate the spectrograph response similar to the iodine cell technique that has been used so successfully in the visible. Stellar spectra are obtained through the ammonia cell and modeled as the product of a Doppler-shifted template spectrum of the object and a spectrum of the cell, convolved with a variable instrumental profile model. A complicating factor is that a significant number of telluric absorption lines are present in the spectral regions containing useful stellar and ammonia lines. The telluric lines are modeled simultaneou...

Bean, Jacob L; Hartman, Henrik; Nilsson, Hampus; Wiedemann, Guenter; Reiners, Ansgar; Dreizler, Stefan; Henry, Todd J

2009-01-01T23:59:59.000Z

91

High precision trace element and organic constituent analysis of oil shale and solvent-refined coal materials  

DOE Green Energy (OSTI)

Broad spectrum inorganic and organic analytical techniques provide the best approach for the initial characterization of the complex samples encountered in working with new energy technologies such as oil shale retorting and solvent refining of coal. In complex samples, analyses are facilitated by techniques, such as neutron activation and x-ray fluorescence, that are relatively insensitive to matrix effects. A comparative organic constituent analysis of the crude shale oil and coal liquid samples analyzed in this study showed that the coal liquids contained higher concentrations of aromatic compounds including polynuclear aromatic hydrocarbons. The coal liquids were considerably richer in phenols than was the shale oil. N-heterocyclics were present in higher concentration in shale oil due to the high nitrogen content of the raw shale. Hydroaromatics were found to be common in coal liquids but negligible in this shale oil. Measurable amounts of the heavy elements Hg, As, Zn, and Se were found in effluent streams from oil shale retorting. The process water also contained significant Co, Br, Sb, and U. The raw oil shale was enriched in Se, As and Sb and somewhat enriched in U, Pb, Cs, Hg, and Zn. Solvent-refined coal liquids were found to be relatively low in most trace elements. Most were concentrated in the mineral residue. Only Br was not depleted in solvent-refined coal. Other trace elements remaining in significant amounts were U, Ta, Cr and Zn. We have not yet measured the trace elements and gaseous and particulate samples from the solvent-refined coal plant. 10 tables.

Fruchter, J.S.; Laul, J.C.; Petersen, M.R.; Ryan, P.W.

1977-03-01T23:59:59.000Z

92

Precision metal rulers  

Science Conference Proceedings (OSTI)

... precision metal rulers. Our customers include state bureaus of Weights and Measures and departments of Agriculture. We also ...

2011-10-28T23:59:59.000Z

93

SUMMARY OF NIST PRECISION MEASUREMENT GRANTS  

Science Conference Proceedings (OSTI)

... of the Lamb shift in H, n = 2, by the Ram- sey method ... Quantum-mechanical analysis of high-precision measure- ments on harmonic oscillators ...

2013-12-05T23:59:59.000Z

94

Prediction of Formation-Tester Fluid-Sample Quality in Highly-Deviated Wells  

E-Print Network (OSTI)

Engineering, The University of Texas at Austin, Austin, TXTX 78712-0228; Emails: rangeles@ mail.utexas.edu, cverdin@mail.utexas.edu, kamys@mail.utexas.edu 2 Formerly with The University of Texas at Austin, currently with Chevron Energy Technology Company, Houston, TX 77099; Email: mmalik@chevron.com ©2009 Society

Torres-Verdín, Carlos

95

High Accuracy Non--A/C Powered Leak Tester and Volume A/C ...  

Sandia estimates this technology at approximately TRL 6. A prototype of this tech-nology has been developed and tested at Sandia. PROPERTY POTENTIAL ...

96

High Accuracy Non-A/C Powered Leak Tester and Volume ...  

Prototype - Sandia estimates this technology at approximately TRL 6. A prototype of this technology has been developed and tested at Sandia. ...

97

Precision Combustion, Inc  

NLE Websites -- All DOE Office Websites (Extended Search)

Developing Reliable, Cost Effective Fuel Processors. Abstract: Precision Combustion, Inc. (PCI) is developing ultra-compact Fuel Processing systems for a range of Fuel Cells and...

98

Precision volume measurement system.  

Science Conference Proceedings (OSTI)

A new precision volume measurement system based on a Kansas City Plant (KCP) design was built to support the volume measurement needs of the Gas Transfer Systems (GTS) department at Sandia National Labs (SNL) in California. An engineering study was undertaken to verify or refute KCP's claims of 0.5% accuracy. The study assesses the accuracy and precision of the system. The system uses the ideal gas law and precise pressure measurements (of low-pressure helium) in a temperature and computer controlled environment to ratio a known volume to an unknown volume.

Fischer, Erin E.; Shugard, Andrew D.

2004-11-01T23:59:59.000Z

99

New methods for precision Møller polarimetry  

Science Conference Proceedings (OSTI)

Precision electron beam polarimetry is becoming increasingly important as parity violation experiments attempt to probe the frontiers of the standard model. In the few GeV regime, Møller polarimetry is well suited to high-precision measurements, however is generally limited to use at relatively low beam currents (< 10 ?A). We present a novel technique that will enable precision Møller polarimetry at very large currents, up to 100?A.

D. Gaskell; D.G. Meekins; C. Yan

2007-07-01T23:59:59.000Z

100

Precision Electroweak Physics  

Science Conference Proceedings (OSTI)

The status in electroweak precision physics is reviewed. I present a brief summary of the latest data, global fit results, a few implications for new physics, and an outlook.

Erler, Jens [Instituto de Fisica, Universidad Nacional Autonoma de Mexico, 04510 Mexico D.F. (Mexico)

2006-09-25T23:59:59.000Z

Note: This page contains sample records for the topic "high precision tester" 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 precision high flow range control valve  

DOE Patents (OSTI)

A fluid control valve is described having a valve housing having first and second valve housing openings for the ingress and egress of fluid through the control valve. Disposed within a void formed by the control valve is a sleeve having at least one sleeve opening to permit the flow of fluid therethrough. A flow restricter travels within the sleeve to progressively block off the sleeve opening and thereby control flow. A fluid passageway is formed between the first valve housing opening and the outer surface of the sleeve. A second fluid passageway is formed between the inside of the sleeve and the second valve housing opening. Neither fluid passageway contains more than one 90.degree. turn. In the preferred embodiment only one of the two fluid passageways contains a 90.degree. turn. In another embodiment, the control valve housing is bifurcated by a control surface having control surface opening disposed therethrough. A flow restricter is in slidable contact with the control surface to restrict flow of fluid through the control surface openings.

McCray, John A. (Idaho Falls, ID)

1999-01-01T23:59:59.000Z

102

Research on Precise Support for Armored Equipment  

Science Conference Proceedings (OSTI)

The current support of the armored equipment is traditional extensive mode. There are many problems, such as excessive maintenance, late maintenance and high ratio of expenses to battle effectiveness. Aiming at these problems, the significance of Precise ... Keywords: Precise Support, Armored Equipment, advanced sensors, C4ISR

Yong-chun Xia; Yu-hua Zhou; Ren-jie Xu; Bi-wei Xie

2012-03-01T23:59:59.000Z

103

Precision linear ramp function generator  

DOE Patents (OSTI)

A ramp function generator is provided which produces a precise linear ramp function which is repeatable and highly stable. A derivative feedback loop is used to stabilize the output of an integrator in the forward loop and control the ramp rate. The ramp may be started from a selected baseline voltage level and the desired ramp rate is selected by applying an appropriate constant voltage to the input of the integrator.

Jatko, W.B.; McNeilly, D.R.; Thacker, L.H.

1984-08-01T23:59:59.000Z

104

Method for grinding precision components  

DOE Patents (OSTI)

A method for precision cylindrical grinding of hard brittle materials, such as ceramics or glass and composites comprising ceramics or glass, provides material removal rates as high as 19-380 cm.sup.3 /min/cm. The abrasive tools used in the method comprise a strong, light weight wheel core bonded to a continuous rim of abrasive segments containing superabrasive grain in a dense metal bond matrix.

Ramanath, Srinivasan (Holden, MA); Kuo, Shih Yee (Westboro, MA); Williston, William H. (Holden, MA); Buljan, Sergej-Tomislav (Acton, MA)

2000-01-01T23:59:59.000Z

105

Precision surface machining  

DOE Patents (OSTI)

Precision finishing apparatus utilizing line contact polishing to produce optical quality parts. A rotatable cylinder is horizontally disposed above a workpiece which is mounted on a rotatable, and horizontally and vertically adjustable chuck. Predetermined surfaces can be cut into the surface of the cylinder to produce figures of revolution, such as aspheres,, when the workpiece is being rotated.

Lazazzera, V.J.; Schmell, R.A.

1991-03-06T23:59:59.000Z

106

Precision Irrigators Network  

E-Print Network (OSTI)

Identifying best management practices (BMPs) promoting greater water use efficiency while maintaining crop yields is essential to the future of Texas cropping systems. Available water for irrigated crops is vital for sustaining crop production throughout the state. However, the availability of this water for irrigation is diminishing through competition by urban development and, in some regions such as the Edwards Aquifer, is falling under state regulation. The awareness and improvement of efficient irrigation and best management practices to conserve water while maintaining crop production will help preserve the aquifer levels and increase water savings to producers. One component of BMPs for conserving water use is the application of decision support systems (DSS) that are used as tools for implementing irrigation BMPs. This DSS guide was developed as a complement to TWDB Report 362, "Water Conservation Best Management Practices Guide," which is a more comprehensive report on water conservation including an "Agricultural Irrigation Water Use Management" BMPs section. The full TWDB Report 362 can be found at: http://www.twdb.state.tx.us/assistance/conservation/consindex.asp. DSS include the Texas High Plains Evapotranspiration Network (TXHPET), the Precision Irrigators Network (PIN) and the Crop Production Management (CroPMan) model. These DSS strive to promote grower awareness of water conservation strategies. Irrigation conservation strategies are proposed to result in savings of approximately 1.4 million acre-feet per year by 2060 (TWDB and TWRI). TXHPET operates 18 meteorological stations located in 15 counties across the Texas North Plains and Texas South Plains. The regional coverage of TXHPET is estimated at 4 million irrigated acres. The network offers insight to evapotranspiration (ET)-based crop water use that producers and agricultural consultants can reference when making decisions on when and how much to irrigate their crops. This information is available to data users via fax or online (http://txhighplainset.tamu.edu) and currently results in approximately 300,000 downloads or faxes annually. The PIN program was formed in 2004 with a goal of saving millions of gallons of water annually by reducing irrigation water use by as much as 20 percent over several years and currently supports several crops (corn, cotton, sorghum, wheat) in seven counties of South Central Texas. Cooperation of the PIN programs consists of area producers, Texas Agricultural Experiment Station researchers, Texas Cooperative Extension personnel, San Antonio Water System, Edwards Aquifer Authority, Texas Water Resources Institute, Texas Water Development Board, Uvalde County Underground Water Conservation District and Wintergarden Water Conservation District. The PIN database will allow producers to gain historical and real-time information for better management of irrigation scheduling. The PIN program estimates that when all irrigators in the Edwards Aquifer region implement limited irrigation scheduling, approximately 50,000 to 60,000 acre-feet of water can be saved per year and made available for purposes other than agriculture. CroPMan is a computer model designed to aid producers and agricultural consultants in optimizing crop management and maximizing production and profit through a production-risk approach. CroPMan will help growers identify limitations to crop yield, assist in making replant decisions and help recognize management practices that reduce the impact of agriculture on soil erosion and water quality. CroPMan is a Windows-based application program that can be downloaded from the CroPMan Web site (http://cropman.brc.tamus.edu).

Bynum, J.; Cothren, T.; Marek, T.; Piccinni, G.

2007-08-01T23:59:59.000Z

107

Precision Data -Laboratory Proficiency Program  

Science Conference Proceedings (OSTI)

Precision Data Series is a valuable reference tool that can be used for determining the expected variability in the methods used in your lab. Precision Data -Laboratory Proficiency Program Laboratory Services analysis analytical methods aocs certi

108

Antihydrogen production and precision experiments  

DOE Green Energy (OSTI)

The study of CPT invariance with the highest achievable precision in all particle sectors is of fundamental importance for physics. Equally important is the question of the gravitational acceleration of antimatter. In recent years, impressive progress has been achieved in capturing antiprotons in specially designed Penning traps, in cooling them to energies of a few milli-electron volts, and in storing them for hours in a small volume of space. Positrons have been accumulated in large numbers in similar traps, and low energy positron or positronium beams have been generated. Finally, steady progress has been made in trapping and cooling neutral atoms. Thus the ingredients to form antihydrogen at rest are at hand. Once antihydrogen atoms have been captured at low energy, spectroscopic methods can be applied to interrogate their atomic structure with extremely high precision and compare it to its normal matter counterpart, the hydrogen atom. Especially the 1S-2S transition, with a lifetime of the excited state of 122 msec and thereby a natural linewidth of 5 parts in 10{sup 16}, offers in principle the possibility to directly compare matter and antimatter properties at a level of 1 part in 10{sup 16}.

Nieto, M.M.; Goldman, T.; Holzscheiter, M.H. [and others

1996-12-31T23:59:59.000Z

109

Design and development of high precision elastomeric-stamp wrapping system for roll-to-roll multi-layer microcontact printing  

E-Print Network (OSTI)

Microcontact printing is an emerging printing technique that could potentially find application in the electronics industry. High-speed roll-to-roll equipment was built at Nano Terra, Inc in 2008, for microcontact printing. ...

Datar, Charudatta Achyut

2009-01-01T23:59:59.000Z

110

CX-009179: Categorical Exclusion Determination | Department of...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Exclusion Determination CX-009179: Categorical Exclusion Determination (0675-1511) Ford Motor Company - High Precision Tester for Automotive and Stationary Batteries CX(s) Applied:...

111

Apparatus for precision micromachining with lasers  

DOE Patents (OSTI)

A new material processing apparatus using a short-pulsed, high-repetition-rate visible laser for precision micromachining utilizes a near diffraction limited laser, a high-speed precision two-axis tilt-mirror for steering the laser beam, an optical system for either focusing or imaging the laser beam on the part, and a part holder that may consist of a cover plate and a back plate. The system is generally useful for precision drilling, cutting, milling and polishing of metals and ceramics, and has broad application in manufacturing precision components. Precision machining has been demonstrated through percussion drilling and trepanning using this system. With a 30 W copper vapor laser running at multi-kHz pulse repetition frequency, straight parallel holes with size varying from 500 microns to less than 25 microns and with aspect ratios up to 1:40 have been consistently drilled with good surface finish on a variety of metals. Micromilling and microdrilling on ceramics using a 250 W copper vapor laser have also been demonstrated with good results. Materialographic sections of machined parts show little (submicron scale) recast layer and heat affected zone. 1 fig.

Chang, J.J.; Dragon, E.P.; Warner, B.E.

1998-04-28T23:59:59.000Z

112

Apparatus for precision micromachining with lasers  

DOE Patents (OSTI)

A new material processing apparatus using a short-pulsed, high-repetition-rate visible laser for precision micromachining utilizes a near diffraction limited laser, a high-speed precision two-axis tilt-mirror for steering the laser beam, an optical system for either focusing or imaging the laser beam on the part, and a part holder that may consist of a cover plate and a back plate. The system is generally useful for precision drilling, cutting, milling and polishing of metals and ceramics, and has broad application in manufacturing precision components. Precision machining has been demonstrated through percussion drilling and trepanning using this system. With a 30 W copper vapor laser running at multi-kHz pulse repetition frequency, straight parallel holes with size varying from 500 microns to less than 25 microns and with aspect ratios up to 1:40 have been consistently drilled with good surface finish on a variety of metals. Micromilling and microdrilling on ceramics using a 250 W copper vapor laser have also been demonstrated with good results. Materialogroaphic sections of machined parts show little (submicron scale) recast layer and heat affected zone.

Chang, Jim J. (Dublin, CA); Dragon, Ernest P. (Danville, CA); Warner, Bruce E. (Pleasanton, CA)

1998-01-01T23:59:59.000Z

113

Inference from Low Precision Transcriptome Data Representation  

Science Conference Proceedings (OSTI)

Microarray measurements are being widely used to infer gene functions, identify regulatory mechanisms and to predict phenotypes. These measurements are usually made and recorded to high numerical precision (e.g. 0.24601). However, aspects of the underlying ... Keywords: Gene expression, Inference, Microarray, Quantization

Salih Tuna; Mahesan Niranjan

2010-03-01T23:59:59.000Z

114

Precision Flow Technologies | Open Energy Information  

Open Energy Info (EERE)

Precision Flow Technologies Precision Flow Technologies Jump to: navigation, search Name Precision Flow Technologies Place Saugerties, New York Zip 12477 Product New York-based, firm focused on the design and manufacture of ultra high purity gas and control systems. Coordinates 42.07778°, -73.952459° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":42.07778,"lon":-73.952459,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

115

Building Fusion Targets with Precision Robotics  

The precision robotic assembly machine’s manipulator system provides precise and repeatable motions, the force and torque

116

Towards a high-precision atomic gyroscope  

E-Print Network (OSTI)

In this thesis, I report on the design and construction of the Rubidium Atomic Gyroscope Experiment (RAGE) at Draper Lab.

Van Camp, Mackenzie A. (Mackenzie Anne)

2013-01-01T23:59:59.000Z

117

Compact high precision adjustable beam defining aperture  

DOE Patents (OSTI)

The present invention provides an adjustable aperture for limiting the dimension of a beam of energy. In an exemplary embodiment, the aperture includes (1) at least one piezoelectric bender, where a fixed end of the bender is attached to a common support structure via a first attachment and where a movable end of the bender is movable in response to an actuating voltage applied to the bender and (2) at least one blade attached to the movable end of the bender via a second attachment such that the blade is capable of impinging upon the beam. In an exemplary embodiment, the beam of energy is electromagnetic radiation. In an exemplary embodiment, the beam of energy is X-rays.

Morton, Simon A; Dickert, Jeffrey

2013-07-02T23:59:59.000Z

118

Very-High-Precision Calculations in Physics  

E-Print Network (OSTI)

This is the introductory part of my Ph.D thesis, defended at the Faculty of Science and Technology, NTNU on December 10, 2012.

Amna Noreen

2013-04-10T23:59:59.000Z

119

High-Precision Isotopic Reference Materials  

Science Conference Proceedings (OSTI)

... sources, is now capable of measuring isotope ratios with ... revolution in the use of isotopes by revealing ... This program will have an impact in several ...

2012-10-22T23:59:59.000Z

120

Categorical Exclusion Determination Form Proposed Action Title: (0675-1511) Ford Motor Company -  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

11) Ford Motor Company - 11) Ford Motor Company - High Precision Tester for Automotive and Stationary Batteries Program or Field Office:Advanced Research Projects Agency - Energy LocationCs) CCity/County/State): Dearborn, MI; Albuquerque, NM; College Station, TX Proposed Action Description: Funding will support efforts to develop a high precision battery tester to measure key battery characteristics during charge/discharge cycles to improve the accuracy and precision of Columbic Efficiency and predicted life expectancy estimates. Proposed work will consist of: (1) development and validation of a low current battery tester that meets established performance objectives and (2) development and validation a high current battery tester that meets established performance objectives.

Note: This page contains sample records for the topic "high precision tester" 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

Microbiopsy/precision cutting devices  

DOE Patents (OSTI)

Devices are disclosed for performing tissue biopsy on a small scale (microbiopsy). By reducing the size of the biopsy tool and removing only a small amount of tissue or other material in a minimally invasive manner, the risks, costs, injury and patient discomfort associated with traditional biopsy procedures can be reduced. By using micromachining and precision machining capabilities, it is possible to fabricate small biopsy/cutting devices from silicon. These devices can be used in one of four ways (1) intravascularly, (2) extravascularly, (3) by vessel puncture, and (4) externally. Additionally, the devices may be used in precision surgical cutting. 6 figs.

Krulevitch, P.A.; Lee, A.P.; Northrup, M.A.; Benett, W.J.

1999-07-27T23:59:59.000Z

122

Electrical Circuit Tester  

DOE Patents (OSTI)

An electrical circuit testing device is provided, comprising a case, a digital voltage level testing circuit with a display means, a switch to initiate measurement using the device, a non-shorting switching means for selecting pre-determined electrical wiring configurations to be tested in an outlet, a terminal block, a five-pole electrical plug mounted on the case surface and a set of adapters that can be used for various multiple-pronged electrical outlet configurations for voltages from 100 600 VAC from 50 100 Hz.

Love, Frank (Amarillo, TX)

2006-04-18T23:59:59.000Z

123

Conducting fiber compression tester  

DOE Patents (OSTI)

The invention measures the resistance across a conductive fiber attached to a substrate place under a compressive load to determine the amount of compression needed to cause the fiber to fail. 3 figs.

DeTeresa, S.J.

1989-12-07T23:59:59.000Z

124

Precision Tests of Electroweak Interactions  

Science Conference Proceedings (OSTI)

The status of the precision tests of the electroweak interactions is reviewed in this paper. An emphasis is put on the Standard Model analysis based on measurements at LEP/SLC and the Tevatron. The results of the measurements of the electroweak mixing angle in the NuTeV experiment and the future prospects are discussed.

Akhundov, Arif [Institute of Physics, Azerbaijan Academy of Sciences, 370143 Baku (Azerbaijan); Departamento de Fisica Teorica and IFIC, Universidad de Valencia-CSIC, 46100 Valencia (Spain)

2008-04-21T23:59:59.000Z

125

Utility of atomic kicked-rotor interferometers for precision measurements  

Science Conference Proceedings (OSTI)

We theoretically investigate a proposed scheme to use an atomic {delta}-kicked rotor resonance for high-precision measurements of accelerations and the photon recoil frequency. Although the technique offers rapid scaling of the measurement sensitivity with pulse number, it also features a high sensitivity to initial atomic momentum. We find that for realistic atom sources, the momentum sensitivity significantly limits the achievable precision. We consider several different variations on the technique, but find similar limitations in all cases.

Horne, R. A.; Leonard, R. H.; Sackett, C. A. [Physics Department, University of Virginia, Charlottesville, Virginia 22904 (United States)

2011-06-15T23:59:59.000Z

126

MST: Organizations: Precision Meso Manufacturing  

NLE Websites -- All DOE Office Websites (Extended Search)

Precision Meso Manufacturing Precision Meso Manufacturing Many engineers and product realization teams at Sandia National Laboratories are currently engaged in efforts to create revolutionary national security products that feature unprecedented functionality in ever-smaller, more portable configurations. In the course of development, the Sandia technology community has realized the need for manufacturing capabilities that expand upon what traditional microfabrication provides. The term “meso,” derived from the Greek mesos, meaning “intermediate” or “in the middle,” describes operations on a length scale that typically ranges from hundreds of micrometers to one centimeter. Meso Manufacturing involves a suite of innovative fabrication and metrology tools that compliment each other to make these products a reality. The Meso

127

Workshop on Precision Measurements of $\\alpha_s$  

Science Conference Proceedings (OSTI)

These are the proceedings of the Workshop on Precision Measurements of {alpha}{sub s} held at the Max-Planck-Institute for Physics, Munich, February 9-11, 2011. The workshop explored in depth the determination of {alpha}{sub s}(m{sub Z}) in the {ovr MS} scheme from the key categories where high precision measurements are currently being made, including DIS and global PDF fits, {tau}-decays, electro-weak precision observables and Z-decays, event-shapes, and lattice QCD. These proceedings contain a short summary contribution from the speakers, as well as the lists of authors, conveners, participants, and talks.

Bethke, Siegfried; /Munich, Max Planck Inst.; Hoang, Andre H.; /Vienna U.; Kluth, Stefan; /Munich, Max Planck Inst.; Schieck, Jochen; /Munich U.; Stewart, Iain W.; Aoki, S.; Beneke, M.; Bethke, S.; Blumlein, J.; Brambilla, N.; Brodsky, S.; /MIT, LNS

2011-10-01T23:59:59.000Z

128

Precision measurement of cosmic magnification from 21 cm emitting galaxies  

DOE Green Energy (OSTI)

We show how precision lensing measurements can be obtained through the lensing magnification effect in high redshift 21cm emission from galaxies. Normally, cosmic magnification measurements have been seriously complicated by galaxy clustering. With precise redshifts obtained from 21cm emission line wavelength, one can correlate galaxies at different source planes, or exclude close pairs to eliminate such contaminations. We provide forecasts for future surveys, specifically the SKA and CLAR. SKA can achieve percent precision on the dark matter power spectrum and the galaxy dark matter cross correlation power spectrum, while CLAR can measure an accurate cross correlation power spectrum. The neutral hydrogen fraction was most likely significantly higher at high redshifts, which improves the number of observed galaxies significantly, such that also CLAR can measure the dark matter lensing power spectrum. SKA can also allow precise measurement of lensing bispectrum.

Zhang, Pengjie; /Fermilab; Pen, Ue-Li; /Canadian Inst. Theor. Astrophys.

2005-04-01T23:59:59.000Z

129

Soviet precision timekeeping research and technology  

DOE Green Energy (OSTI)

This report is the result of a study of Soviet progress in precision timekeeping research and timekeeping capability during the last two decades. The study was conducted by a panel of seven US scientists who have expertise in timekeeping, frequency control, time dissemination, and the direct applications of these disciplines to scientific investigation. The following topics are addressed in this report: generation of time by atomic clocks at the present level of their technology, new and emerging technologies related to atomic clocks, time and frequency transfer technology, statistical processes involving metrological applications of time and frequency, applications of precise time and frequency to scientific investigations, supporting timekeeping technology, and a comparison of Soviet research efforts with those of the United States and the West. The number of Soviet professionals working in this field is roughly 10 times that in the United States. The Soviet Union has facilities for large-scale production of frequency standards and has concentrated its efforts on developing and producing rubidium gas cell devices (relatively compact, low-cost frequency standards of modest accuracy and stability) and atomic hydrogen masers (relatively large, high-cost standards of modest accuracy and high stability). 203 refs., 45 figs., 9 tabs.

Vessot, R.F.C.; Allan, D.W.; Crampton, S.J.B.; Cutler, L.S.; Kern, R.H.; McCoubrey, A.O.; White, J.D.

1991-08-01T23:59:59.000Z

130

Precision moisture generation and measurement.  

SciTech Connect

In many industrial processes, gaseous moisture is undesirable as it can lead to metal corrosion, polymer degradation, and other materials aging processes. However, generating and measuring precise moisture concentrations is challenging due to the need to cover a broad concentration range (parts-per-billion to percent) and the affinity of moisture to a wide range surfaces and materials. This document will discuss the techniques employed by the Mass Spectrometry Laboratory of the Materials Reliability Department at Sandia National Laboratories to generate and measure known gaseous moisture concentrations. This document highlights the use of a chilled mirror and primary standard humidity generator for the characterization of aluminum oxide moisture sensors. The data presented shows an excellent correlation in frost point measured between the two instruments, and thus provides an accurate and reliable platform for characterizing moisture sensors and performing other moisture related experiments.

Thornberg, Steven Michael; White, Michael I.; Irwin, Adriane Nadine

2010-03-01T23:59:59.000Z

131

Precision Cosmology and the Landscape  

E-Print Network (OSTI)

After reviewing the cosmological constant problem - why is Lambda not huge? - I outline the two basic approaches that had emerged by the late 1980s, and note that each made a clear prediction. Precision cosmological experiments now indicate that the cosmological constant is nonzero. This result strongly favors the environmental approach, in which vacuum energy can vary discretely among widely separated regions in the universe. The need to explain this variation from first principles constitutes an observational constraint on fundamental theory. I review arguments that string theory satisfies this constraint, as it contains a dense discretuum of metastable vacua. The enormous landscape of vacua calls for novel, statistical methods of deriving predictions, and it prompts us to reexamine our description of spacetime on the largest scales. I discuss the effects of cosmological dynamics, and I speculate that weighting vacua by their entropy production may allow for prior-free predictions that do not resort to explicitly anthropic arguments.

Raphael Bousso

2006-10-18T23:59:59.000Z

132

Precision Designs | Open Energy Information  

Open Energy Info (EERE)

Designs Designs Jump to: navigation, search Name Precision Designs Place Rochester, New York Zip 14624 Product Manufacturer of test equipment for fuel cells. Coordinates 43.1555°, -77.616033° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":43.1555,"lon":-77.616033,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

133

TASI Lectures on Precision Electroweak Physics  

E-Print Network (OSTI)

These notes are a written version of a set of lectures given at TASI-02 on the topic of precision electroweak physics.

Konstantin Matchev

2004-02-03T23:59:59.000Z

134

Precision: Compromise Agreement (2013-SE-1410)  

Energy.gov (U.S. Department of Energy (DOE))

DOE and Precision Trading Corp. entered into a Compromise Agreement to resolve a case involving the distribution in commerce of noncompliant freezers.

135

Efficient design of precision medical robotics  

E-Print Network (OSTI)

Medical robotics is increasingly demonstrating the potential to improve patient care through more precise interventions. However, taking inspiration from industrial robotics has often resulted in large, sometimes cumbersome ...

Hanumara, Nevan Clancy

2012-01-01T23:59:59.000Z

136

LPP Precision Data Series 2012-2013  

Science Conference Proceedings (OSTI)

The Laboratory Proficiency Program Precision Data Series is a valuable reference tool that can be used for determining the expected variability in the methods used in your lab. LPP Precision Data Series 2012-2013 Lab Supplies Lab Supplies Lab Supplies

137

LPP Precision Data Series 2009-2010  

Science Conference Proceedings (OSTI)

The Laboratory Proficiency Program Precision Data Series is a valuable reference tool that can be used for determining the expected variability in the methods used in your lab. LPP Precision Data Series 2009-2010 Lab Supplies Lab Supplies AOCS Technical

138

LPP Precision Data Series 2011-2012  

Science Conference Proceedings (OSTI)

The Laboratory Proficiency Program Precision Data Series is a valuable reference tool that can be used for determining the expected variability in the methods used in your lab. LPP Precision Data Series 2011-2012 Lab Supplies Lab Supplies Lab Supplies

139

LPP Precision Data Series 2010-2011  

Science Conference Proceedings (OSTI)

The Laboratory Proficiency Program Precision Data Series is a valuable reference tool that can be used for determining the expected variability in the methods used in your lab. LPP Precision Data Series 2010-2011 Lab Supplies Lab Supplies AOCS Technical

140

Precision spectroscopy of the helium atom.  

SciTech Connect

Persistent efforts in both theory and experiment have yielded increasingly precise understanding of the helium atom. Because of its simplicity, the helium atom has long been a testing ground for relativistic and quantum electrodynamic effects in few-body atomic systems theoretically and experimentally. Comparison between theory and experiment of the helium spectroscopy in 1s2p{sup 3}P{sub J} can potentially extract a very precise value of the fine structure constant a. The helium atom can also be used to explore exotic nuclear structures. In this paper, we provide a brief review of the recent advances in precision calculations and measurements of the helium atom.

Hu, S.-M.; Lu, Z.-T.; Yan, Z.-C.; Physics; Univ. of Science and Technology of China; Univ. of Chicago; Univ. of New Brunswick

2009-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "high precision tester" 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

Spark-gap device for precise switching  

DOE Patents (OSTI)

An improved spark gap apparatus is provided for precise switching of high currents from charged capacitors, and for protecting circuitry and circuit components, such as an energy storage capacitor, from overvoltage surges. The invention includes a pair of niobium electrodes with a melting point greater than 2000/sup 0/C that forms the spark gap. The electrodes are supported by conductive caps spaced apart from one another by an insulating member all of which form a hermetically sealed chamber filled with an inert, ionizable gas, preferably pure xenon. The spark gap device includes a quantity of solid radioactive stabilizer, carbon-14, placed within the hermetically sealed chamber adjacent to the spark gap. Methods for fabricating the device and its components are described. It is claimed that use of the Nb electrodes forestalls electrode erosion even under severe voltage and discharge conditions, that, by employing pure Xe gas, and solid carbon-14 radiation stabilizer, it is unnecessary to employ radioactive gases or chemically plated radioactive sources to promote ionization, and that, by selection of a suitable spark gap, a spark gap device is obtained which is capable of switching at 1700 V +- 10% for input voltage rates up to 570 V/ms and allowing peak discharge currents up to 3000 A from a 0.3 microfarad energy storage capacitor for more than 1000 operations. (LCL)

Boettcher, G.E.

1982-01-28T23:59:59.000Z

142

Benchmark precision and random initial state  

E-Print Network (OSTI)

The applications of software benchmarks place an obvious demand on the precision of the benchmark results. An intuitive and frequently employed approach to obtaining precise enough benchmark results is having the benchmark collect a large number of samples that are simply averaged or otherwise statistically processed. We show that this approach ignores an inherent and unavoidable nondeterminism in the initial state of the system that is evaluated, often leading to an implausible estimate of result precision. We proceed by outlining the sources of nondeterminism in a typical system, illustrating the impact of the nondeterminism on selected classes of benchmarks. Finally, we suggest a method for quantitatively assessing the influence of nondeterminism on a benchmark, as well as approach that provides a plausible estimate of result precision in face of the nondeterminism.

Tomas Kalibera; Lubomir Bulej; Petr Tuma

2005-01-01T23:59:59.000Z

143

Apollo Precision Ltd | Open Energy Information  

Open Energy Info (EERE)

Province, China Sector Solar Product China-based equipment manufacturer of thin-film solar PV modules. References Apollo Precision Ltd1 LinkedIn Connections CrunchBase...

144

Gallant Precision Machining GPM | Open Energy Information  

Open Energy Info (EERE)

Gallant Precision Machining GPM Gallant Precision Machining GPM Jump to: navigation, search Name Gallant Precision Machining (GPM) Place Hsinchu, Taiwan Sector Solar Product Engaged in the design and manufacture of solar cell manufacturing equpiment. Coordinates 24.69389°, 121.148064° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":24.69389,"lon":121.148064,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

145

Precise Photometry and Spectroscopy of Transits  

E-Print Network (OSTI)

A planetary transit produces both a photometric signal and a spectroscopic signal. Precise observations of the transit light curve reveal the planetary radius and allow a search for timing anomalies caused by satellites or additional planets. Precise measurements of the stellar Doppler shift throughout a transit (the Rossiter-McLaughlin effect) place a lower bound on the stellar obliquity, which may be indicative of the planet's migration history. I review recent results of the Transit Light Curve project, and of a parallel effort to measure the Rossiter effect for many of the known transiting planets.

Joshua N. Winn

2007-10-04T23:59:59.000Z

146

Lase Ultrasonic Web Stiffness tester  

Science Conference Proceedings (OSTI)

The objective is to provide a sensor that uses non-contact, laser ultrasonics to measure the stiffness of paper during the manufacturing process. This will allow the manufacturer to adjust the production process in real time, increase filler content, modify fiber refining and as result produce a quality product using less energy. The sensor operates by moving back and forth across the paper web, at pre-selected locations firing a laser at the sheet, measuring the out-of-plane velocity of the sheet then using that measurement to calculate sheet stiffness.

Tim Patterson, Ph.D., IPST at Ga Tech

2009-01-12T23:59:59.000Z

147

Automated Fresnel lens tester system  

DOE Green Energy (OSTI)

An automated data collection system controlled by a desktop computer has been developed for testing Fresnel concentrators (lenses) intended for solar energy applications. The system maps the two-dimensional irradiance pattern (image) formed in a plane parallel to the lens, whereas the lens and detector assembly track the sun. A point detector silicon diode (0.5-mm-dia active area) measures the irradiance at each point of an operator-defined rectilinear grid of data positions. Comparison with a second detector measuring solar insolation levels results in solar concentration ratios over the image plane. Summation of image plane energies allows calculation of lens efficiencies for various solar cell sizes. Various graphical plots of concentration ratio data help to visualize energy distribution patterns.

Phipps, G.S.

1981-07-01T23:59:59.000Z

148

Precision aligned split V-block  

SciTech Connect

A precision aligned split V-block for holding a workpiece during a milling operation having an expandable frame for allowing various sized workpieces to be accommodated, is easily secured directly to the mill table and having key lugs in one base of the split V-block that assures constant alignment.

George, Irwin S. (3240 Siringo Rd., Santa Fe, NM 87501)

1984-01-01T23:59:59.000Z

149

Reduced-precision redundancy on FPGAs  

Science Conference Proceedings (OSTI)

Reduced-precision redundancy (RPR) has been shown to be a viable alternative to triple modular redundancy (TMR) for digital circuits. This paper builds on previous research by offering a detailed analysis of the implementation of RPR on FPGAs to improve ...

Brian Pratt; Megan Fuller; Michael Wirthlin

2011-01-01T23:59:59.000Z

150

Precise Measurement of Deuteron Tensor Analyzing Powers with BLAST  

SciTech Connect

We report a precision measurement of the deuteron tensor analyzing powers T{sub 20} and T{sub 21} at the MIT-Bates Linear Accelerator Center. Data were collected simultaneously over a momentum transfer range Q=2.15-4.50 fm{sup -1} with the Bates Large Acceptance Spectrometer Toroid using a highly polarized deuterium internal gas target. The data are in excellent agreement with calculations in a framework of effective field theory. The deuteron charge monopole and quadrupole form factors G{sub C} and G{sub Q} were separated with improved precision, and the location of the first node of G{sub C} was confirmed at Q=4.19{+-}0.05 fm{sup -1}. The new data provide a strong constraint on theoretical models in a momentum transfer range covering the minimum of T{sub 20} and the first node of G{sub C}.

Zhang, C.; Akdogan, T.; Bertozzi, W.; Botto, T.; Clasie, B.; DeGrush, A.; Dow, K.; Farkhondeh, M.; Franklin, W.; Gilad, S.; Hasell, D.; Kolster, H.; Maschinot, A.; Matthews, J.; Meitanis, N.; Milner, R.; Redwine, R.; Seely, J.; Shinozaki, A.; Tschalaer, C. [Laboratory for Nuclear Science and Bates Linear Accelerator Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)

2011-12-16T23:59:59.000Z

151

Precision Electroweak Measurements and Constraints on the Standard Model  

Science Conference Proceedings (OSTI)

This note presents constraints on Standard Model parameters using published and preliminary precision electroweak results measured at the electron-positron colliders LEP and SLC. The results are compared with precise electroweak measurements from other experiments, notably CDF and D0 at the Tevatron. Constraints on the input parameters of the Standard Model are derived from the results obtained in high-Q{sup 2} interactions, and used to predict results in low-Q{sup 2} experiments, such as atomic parity violation, Moller scattering, and neutrino-nucleon scattering. The main changes with respect to the experimental results presented in 2007 are new combinations of results on the W-boson mass and width and the mass of the top quark.

Not Available

2011-11-11T23:59:59.000Z

152

TurboTech Precision Engineering Private Limited | Open Energy Information  

Open Energy Info (EERE)

TurboTech Precision Engineering Private Limited TurboTech Precision Engineering Private Limited Jump to: navigation, search Name TurboTech Precision Engineering Private Limited Place Bangalore, India Zip 560 044 Sector Efficiency Product Designs and manufactures of high-efficiency steam turbines in the 50-250kW range. Coordinates 12.97092°, 77.60482° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":12.97092,"lon":77.60482,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

153

The Perfect Nanocube: Precise Control of Size, Shape, and ...  

Science Conference Proceedings (OSTI)

The Perfect Nanocube: Precise Control of Size, Shape, and Composition. For Immediate Release: August 31, 2010. ...

2010-09-28T23:59:59.000Z

154

High-Precision Numerical Integration: Progress and ... - CECM  

E-Print Network (OSTI)

Jul 14, 2009 ... Mathematical, Information, and Computational Sciences of the U.S. Department of Energy, under contract number DE-AC02-05CH11231.

155

A Water Hypsometer Utilizing High-Precision Thermocouples  

Science Conference Proceedings (OSTI)

A boiling-point barometer—commonly called hypsometer—has been developed for use on meteorological radiosondes. In this hypsometer, water is heated electrically, and its boiling temperature is measured with a thermocouple. Once the boiling ...

Hans Richner; Jürg Joss; Paul Ruppert

1996-02-01T23:59:59.000Z

156

Optimization Online - Efficient high-precision dense matrix algebra ...  

E-Print Network (OSTI)

Nov 10, 2008... we have delineated the necessary algorithmic and coding changes required in order to address problems several orders of magnitude larger ...

157

Evaluation of Independent High-Precision Assay Procedures ...  

Science Conference Proceedings (OSTI)

... a large SRM batch. A trial intermediate-size batch was stoichiometric, but it contained excess water. However, as an uncharacterized ...

2012-10-09T23:59:59.000Z

158

Precision replenishable grinding tool and manufacturing process  

DOE Patents (OSTI)

A reusable grinding tool consisting of a replaceable single layer of abrasive particles intimately bonded to a precisely configured tool substrate, and a process for manufacturing the grinding tool are disclosed. The tool substrate may be ceramic or metal and the abrasive particles are preferably diamond, but may be cubic boron nitride. The manufacturing process involves: coating a configured tool substrate with layers of metals, such as titanium, copper and titanium, by physical vapor deposition (PVD); applying the abrasive particles to the coated surface by a slurry technique; and brazing the abrasive particles to the tool substrate by alloying the metal layers. The precision control of the composition and thickness of the metal layers enables the bonding of a single layer or several layers of micron size abrasive particles to the tool surface. By the incorporation of an easily dissolved metal layer in the composition such allows the removal and replacement of the abrasive particles, thereby providing a process for replenishing a precisely machined grinding tool with fine abrasive particles, thus greatly reducing costs as compared to replacing expensive grinding tools. 11 figs.

Makowiecki, D.M.; Kerns, J.A.; Blaedel, K.L.; Colella, N.J.; Davis, P.J.; Juntz, R.S.

1998-06-09T23:59:59.000Z

159

Precision: Noncompliance Determination (2013-SE-1410) | Department of  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Precision: Noncompliance Determination (2013-SE-1410) Precision: Noncompliance Determination (2013-SE-1410) Precision: Noncompliance Determination (2013-SE-1410) April 10, 2013 DOE issued a Notice of Noncompliance Determination to Precision Trading Corp. finding that Precision model Premium PFR515M, a freezer, does not comport with the energy conservation standards. DOE determined the product was noncompliant based on DOE testing. Precision must immediately notify each person (or company) to whom Precision distributed the noncompliant products that the product does not meet Federal standards. In addition, Precision must provide to DOE documents and records showing the number of units Precision distributed and to whom. The manufacturer and/or private labeler of the product may be subject to civil penalties.

160

Batch fabrication of precision miniature permanent magnets  

DOE Patents (OSTI)

A new class of processes for fabrication of precision miniature rare earth permanent magnets is disclosed. Such magnets typically have sizes in the range 0.1 to 10 millimeters, and dimensional tolerances as small as one micron. Very large magnetic fields can be produced by such magnets, lending to their potential application in MEMS and related electromechanical applications, and in miniature millimeter-wave vacuum tubes. This abstract contains simplifications, and is supplied only for purposes of searching, not to limit or alter the scope or meaning of any claims herein.

Christenson, Todd R. (Albuquerque, NM); Garino, Terry J. (Albuquerque, NM); Venturini, Eugene L. (Albuquerque, NM)

2002-01-01T23:59:59.000Z

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161

Superallowed nuclear beta decay: Precision measurements for basic physics  

Science Conference Proceedings (OSTI)

For 60 years, superallowed 0{sup +}{yields}0{sup +} nuclear beta decay has been used to probe the weak interaction, currently verifying the conservation of the vector current (CVC) to high precision ({+-}0.01%) and anchoring the most demanding available test of the unitarity of the Cabibbo-Kobayashi-Maskawa (CKM) matrix ({+-}0.06%), a fundamental pillar of the electroweak standard model. Each superallowed transition is characterized by its ft-value, a result obtained from three measured quantities: the total decay energy of the transition, its branching ratio, and the half-life of the parent state. Today's data set is composed of some 150 independent measurements of 13 separate superallowed transitions covering a wide range of parent nuclei from {sup 10}C to {sup 74}Rb. Excellent consistency among the average results for all 13 transitions - a prediction of CVC - also confirms the validity of the small transition-dependent theoretical corrections that have been applied to account for isospin symmetry breaking. With CVC consistency established, the value of the vector coupling constant, G{sub V}, has been extracted from the data and used to determine the top left element of the CKM matrix, V{sub ud}. With this result the top-row unitarity test of the CKM matrix yields the value 0.99995(61), a result that sets a tight limit on possible new physics beyond the standard model. To have any impact on these fundamental weak-interaction tests, any measurement must be made with a precision of 0.1% or better - a substantial experimental challenge well beyond the requirements of most nuclear physics measurements. I overview the current state of the field and outline some of the requirements that need to be met by experimentalists if they aim to make measurements with this high level of precision.

Hardy, J. C. [Cylotron Institute, Texas A and M University, College station, TX, 77843-3366 (United States)

2012-11-20T23:59:59.000Z

162

Precision linac and laser technologies for nuclear photonics gamma-ray sources  

SciTech Connect

Tunable, high precision gamma-ray sources are under development to enable nuclear photonics, an emerging field of research. This paper focuses on the technological and theoretical challenges related to precision Compton scattering gamma-ray sources. In this scheme, incident laser photons are scattered and Doppler upshifted by a high brightness electron beam to generate tunable and highly collimated gamma-ray pulses. The electron and laser beam parameters can be optimized to achieve the spectral brightness and narrow bandwidth required by nuclear photonics applications. A description of the design of the next generation precision gamma-ray source currently under construction at Lawrence Livermore National Laboratory is presented, along with the underlying motivations. Within this context, high-gradient X-band technology, used in conjunction with fiber-based photocathode drive laser and diode pumped solid-state interaction laser technologies, will be shown to offer optimal performance for high gamma-ray spectral flux, narrow bandwidth applications.

Albert, F.; Hartemann, F. V.; Anderson, S. G.; Cross, R. R.; Gibson, D. J.; Hall, J.; Marsh, R. A.; Messerly, M.; Wu, S. S.; Siders, C. W.; Barty, C. P. J. [Lawrence Livermore National Laboratory, NIF and Photon Science, 7000 East Avenue, Livermore, California 94550 (United States)

2012-05-15T23:59:59.000Z

163

Hon Hai Precision Industry Co Ltd | Open Energy Information  

Open Energy Info (EERE)

Hon Hai Precision Industry Co Ltd Jump to: navigation, search Name Hon Hai Precision Industry Co Ltd Place Tu-Cheng City, Taiwan Zip 236 Sector Solar Product Taiwan-based...

164

Precision Energy Technology | Open Energy Information  

Open Energy Info (EERE)

Energy Technology Energy Technology Jump to: navigation, search Name Precision Energy & Technology Place Kettering, Ohio Zip 45420 Product Dayton-based, fuel cell designer and manufacturer. Coordinates 39.69525°, -84.162974° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":39.69525,"lon":-84.162974,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

165

Byte-precision level of detail processing for variable precision analytics  

Science Conference Proceedings (OSTI)

I/O bottlenecks in HPC applications are becoming a more pressing problem as compute capabilities continue to outpace I/O capabilities. While double-precision simulation data often must be stored losslessly, the loss of some of the fractional component ...

John Jenkins; Eric R. Schendel; Sriram Lakshminarasimhan; David A. Boyuka, II; Terry Rogers; Stephane Ethier; Robert Ross; Scott Klasky; Nagiza F. Samatova

2012-11-01T23:59:59.000Z

166

Design, implementation and testing of extended and mixed precision BLAS  

Science Conference Proceedings (OSTI)

This article describes the design rationale, a C implementation, and conformance testing of a subset of the new Standard for the BLAS (Basic Linear Algebra Subroutines): Extended and Mixed Precision BLAS. Permitting higher internal precision and mixed ... Keywords: BLAS, double-double arithmetic, extended and mixed precision

Xiaoye S. Li; James W. Demmel; David H. Bailey; Greg Henry; Yozo Hida; Jimmy Iskandar; William Kahan; Suh Y. Kang; Anil Kapur; Michael C. Martin; Brandon J. Thompson; Teresa Tung; Daniel J. Yoo

2002-06-01T23:59:59.000Z

167

Precision envelope detector and linear rectifier circuitry  

DOE Patents (OSTI)

Disclosed is a method and apparatus for the precise linear rectification and envelope detection of oscillatory signals. The signal is applied to a voltage-to-current converter which supplies current to a constant current sink. The connection between the converter and the sink is also applied through a diode and an output load resistor to a ground connection. The connection is also connected to ground through a second diode of opposite polarity from the diode in series with the load resistor. Very small amplitude voltage signals applied to the converter will cause a small change in the output current of the converter, and the difference between the output current and the constant current sink will be applied either directly to ground through the single diode, or across the output load resistor, dependent upon the polarity. Disclosed also is a full-wave rectifier utilizing constant current sinks and voltage-to-current converters. Additionally, disclosed is a combination of the voltage-to-current converters with differential integrated circuit preamplifiers to boost the initial signal amplitude, and with low pass filtering applied so as to obtain a video or signal envelope output.

Davis, Thomas J. (Richland, WA)

1980-01-01T23:59:59.000Z

168

Spark gap device for precise switching  

DOE Patents (OSTI)

A spark gap device for precise switching of an energy storage capacitor into an exploding bridge wire load is disclosed. Niobium electrodes having a melting point of 2,415 degrees centrigrade are spaced apart by an insulating cylinder to define a spark gap. The electrodes are supported by conductive end caps which, together with the insulating cylinder, form a hermetically sealed chamber filled with an inert, ionizable gas, such as pure xenon. A quantity of solid radioactive carbon-14 within the chamber adjacent the spark gap serves as a radiation stabilizer. The sides of the electrodes and the inner wall of the insulating cylinder are spaced apart a sufficient distance to prevent unwanted breakdown initiation. A conductive sleeve may envelop the outside of the insulating member from the midpoint of the spark gap to the cap adjacent the cathode. The outer metallic surfaces of the device may be coated with a hydrogen-impermeable coating to lengthen the shelf life and operating life of the device. The device breaks down at about 1,700 volts for input voltage rates up to 570 volts/millisecond and allows peak discharge currents of up to 3,000 amperes from a 0.3 microfarad energy storage capacitor for more than 1,000 operations.

Boettcher, Gordon E. (Albuquerque, NM)

1984-01-01T23:59:59.000Z

169

Spark gap device for precise switching  

DOE Patents (OSTI)

A spark gap device for precise switching of an energy storage capacitor into an exploding bridge wire load is disclosed. Niobium electrodes having a melting point of 2,415 degrees centigrade are spaced apart by an insulating cylinder to define a spark gap. The electrodes are supported by conductive end caps which, together with the insulating cylinder, form a hermetically sealed chamber filled with an inert, ionizable gas, such as pure xenon. A quantity of solid radioactive carbon-14 within the chamber adjacent the spark gap serves as a radiation stabilizer. The sides of the electrodes and the inner wall of the insulating cylinder are spaced apart a sufficient distance to prevent unwanted breakdown initiation. A conductive sleeve may envelop the outside of the insulating member from the midpoint of the spark gap to the cap adjacent the cathode. The outer metallic surfaces of the device may be coated with a hydrogen-impermeable coating to lengthen the shelf life and operating life of the device. The device breaks down at about 1,700 volts for input voltage rates up to 570 volts/millisecond and allows peak discharge currents of up to 3,000 amperes from a 0.3 microfarad energy storage capacitor for more than 1,000 operations. 3 figs.

Boettcher, G.E.

1984-10-02T23:59:59.000Z

170

PROSPECT - A Precision Reactor Neutrino and Oscillation Spectrum Experiment at Very Short Baselines  

E-Print Network (OSTI)

Antineutrino detectors operated close to a compact research reactor can provide excellent sensitivity to short-baseline oscillation effects through a precision measurement of the reactor antineutrino spectrum at various distances from the core. We describe a proposed 2-detector experiment with a baseline of 4-20m that will enable a high-precision measurement of the reactor antineutrino spectrum from a highly-enriched uranium core at a US research reactor and provide a definitive search for short-baseline neutrino oscillations. In addition, this experiment will provide important enabling technology for reactor monitoring applications.

Z. Djurcic; S. Hans; M. Yeh; E. Blucher; R. Johnson; B. R. Littlejohn; M. Dolinski; C. Lane; T. Allen; S. Morrell; J. G. Learned; J. Maricic; A. Bernstein; N. S. Bowden; T. Classen; A. Glenn; N. Zaitseva; H. P. Mumm; J. S. Nico; R. E. Williams; R. Henning; C. Bryan; D. Dean; Y. Efremenko; D. Radford; P. Huber; J. M. Link; C . Mariani; A. B. Balantekin; H. R. Band; J. C. Cherwinka; K. M. Heeger; W. Wang; T. Langford

2013-09-29T23:59:59.000Z

171

PROSPECT - A Precision Reactor Neutrino and Oscillation Spectrum Experiment at Very Short Baselines  

E-Print Network (OSTI)

Antineutrino detectors operated close to a compact research reactor can provide excellent sensitivity to short-baseline oscillation effects through a precision measurement of the reactor antineutrino spectrum at various distances from the core. We describe a proposed 2-detector experiment with a baseline of 4-20m that will enable a high-precision measurement of the reactor antineutrino spectrum from a highly-enriched uranium core at a US research reactor and provide a definitive search for short-baseline neutrino oscillations. In addition, this experiment will provide important enabling technology for reactor monitoring applications.

Djurcic, Z; Yeh, M; Blucher, E; Johnson, R; Littlejohn, B R; Dolinski, M; Lane, C; Allen, T; Morrell, S; Learned, J G; Maricic, J; Bernstein, A; Bowden, N S; Classen, T; Glenn, A; Zaitseva, N; Mumm, H P; Nico, J S; Williams, R E; Henning, R; Bryan, C; Dean, D; Efremenko, Y; Radford, D; Huber, P; Link, J M; Mariani, C; Balantekin, A B; Band, H R; Cherwinka, J C; Heeger, K M; Wang, W; Langford, T

2013-01-01T23:59:59.000Z

172

PRECISION POINTING OF IBEX-Lo OBSERVATIONS  

SciTech Connect

Post-launch boresight of the IBEX-Lo instrument on board the Interstellar Boundary Explorer (IBEX) is determined based on IBEX-Lo Star Sensor observations. Accurate information on the boresight of the neutral gas camera is essential for precise determination of interstellar gas flow parameters. Utilizing spin-phase information from the spacecraft attitude control system (ACS), positions of stars observed by the Star Sensor during two years of IBEX measurements were analyzed and compared with positions obtained from a star catalog. No statistically significant differences were observed beyond those expected from the pre-launch uncertainty in the Star Sensor mounting. Based on the star observations and their positions in the spacecraft reference system, pointing of the IBEX satellite spin axis was determined and compared with the pointing obtained from the ACS. Again, no statistically significant deviations were observed. We conclude that no systematic correction for boresight geometry is needed in the analysis of IBEX-Lo observations to determine neutral interstellar gas flow properties. A stack-up of uncertainties in attitude knowledge shows that the instantaneous IBEX-Lo pointing is determined to within {approx}0.{sup 0}1 in both spin angle and elevation using either the Star Sensor or the ACS. Further, the Star Sensor can be used to independently determine the spacecraft spin axis. Thus, Star Sensor data can be used reliably to correct the spin phase when the Star Tracker (used by the ACS) is disabled by bright objects in its field of view. The Star Sensor can also determine the spin axis during most orbits and thus provides redundancy for the Star Tracker.

Hlond, M.; Bzowski, M. [Space Research Centre of the Polish Academy of Sciences, 18A Bartycka, 00-716 Warsaw (Poland); Moebius, E.; Kucharek, H.; Heirtzler, D.; Schwadron, N. A.; Neill, M. E. O'; Clark, G. [Space Science Center and Department of Physics, University of New Hampshire, Morse Hall, 8 College Road, Durham, NH 03824 (United States); Crew, G. B. [Haystack Observatory, Massachusetts Institute of Technology, Route 40, Westford, MA 01886 (United States); Fuselier, S. [Lockheed Martin, Space Physics Lab, 3251 Hanover Street, Palo Alto, CA 94304 (United States); McComas, D. J., E-mail: mhlond@cbk.waw.pl, E-mail: eberhard.moebius@unh.edu, E-mail: gbc@haystack.mit.edu, E-mail: stephen.a.fuselier@linco.com, E-mail: DMcComas@swri.edu, E-mail: DMcComas@swri.edu [Southwest Research Institute, P.O. Drawer 28510, San Antonio, TX 78228 (United States)

2012-02-01T23:59:59.000Z

173

Radio Frequency Phototube, Optical Clock and Precise Measurements in Nuclear Physics  

E-Print Network (OSTI)

Recently a new experimental program of novel systematic studies of light hypernuclei using pionic decay was established at JLab (Study of Light Hypernuclei by Pionic Decay at JLab, JLab Experiment PR-08-012). The highlights of the proposed program include high precision measurements of binding energies of hypernuclei by using a high resolution pion spectrometer, HpiS. The average values of binding energies will be determined within an accuracy of ~10 keV or better. Therefore, the crucial point of this program is an absolute calibration of the HpiS with accuracy 10E-4 or better. The merging of continuous wave laser-based precision optical-frequency metrology with mode-locked ultrafast lasers has led to precision control of the visible frequency spectrum produced by mode-locked lasers. Such a phase-controlled mode-locked laser forms the foundation of an optical clock or femtosecond optical frequency comb (OFC) generator, with a regular comb of sharp lines with well defined frequencies. Combination of this technique with a recently developed radio frequency (RF) phototube results in a new tool for precision time measurement. We are proposing a new time-of-flight (TOF) system based on an RF phototube and OFC technique. The proposed TOF system achieves 10 fs instability level and opens new possibilities for precise measurements in nuclear physics such as an absolute calibration of magnetic spectrometers within accuracy 10E-4 - 10E-5.

Amur Margaryan

2009-10-16T23:59:59.000Z

174

NIST Requests Funding Proposals for Projects in Precision ...  

Science Conference Proceedings (OSTI)

... Funding Opportunity (FFO) for the Precision Measurement Grant Program, available from Grants.gov at http://www07.grants.gov/search/search.do ...

2013-12-04T23:59:59.000Z

175

Precision Electroweak Measurements on the Z Presonance  

SciTech Connect

The authors report on the final electroweak measurements performed with data taken at the Z resonance by the experiments operating at the electron-positron colliders SLC and LEP. the data consist of 17 million Z decays accumulated by the ALEPH, DELPHI, L3 and OPAL experiments at LEP, and 600 thousand Z decays by the SLD experiment using a polarized beam at SLC. The measurements include cross-sections, forward-backward asymmetries and polarized asymmetries. The mass and width of the Z boson, m{sub Z} and {Lambda}{sub Z}, and its couplings to fermions, for example the {rho} parameter and the effective electroweak mixing angle for leptons, are precisely measured: m{sub Z} = 91.1875 {+-} 0.0021 GeV; {Lambda}{sub Z} = 2.4952 {+-} 0.0023 GeV; {rho}{sub {ell}} = 1.0050 {+-} 0.0010; sin{sup 2} {theta}{sub eff}{sup lept} = 0.23153 {+-} 0.00016. The number of light neutrino species is determined to be 2.9840 {+-} 0.0082, in agreement with the three observed generations of fundamental fermions. The results are compared to the predictions of the Standard Model. At the Z-pole, electroweak radiative corrections beyond the running of the QED and QCD coupling constants are observed with a significance of five standard deviations, and in agreement with the Standard Model. of the many Z-pole measurements, the forward-backward asymmetry in b-quark production shows the largest difference with respect to its Standard Model expectation, at the level of 2.8 standard deviations. Through radiative corrections evaluated in the framework of the Standard Model, the Z-pole data are also used to predict the mass of the top quark, m{sub t} = 173{sub -10}{sup +13} GeV, and the mass of the W boson, m{sub W} = 80.363 {+-} 0.032 GeV. These indirect constraints are compared to the direct measurements, providing a stringent test of the Standard Model. Using in addition the direct measurements of m{sub t} and m{sub W}, the mass of the as yet unobserved Standard Model Higgs boson is predicted with a relative uncertainty of about 50% and found to be less than 285 GeV at 95% confidence level.

Aleph,Delphi,L3,Opal,SLD , Collaborations

2005-09-08T23:59:59.000Z

176

Measurement and Modeling of High Strain-rate Deformation  

Science Conference Proceedings (OSTI)

... with Numerical Simulation · Using Huge Pendulum Impact Tester to Evaluate the Dynamic Fracture Toughness and Crack Behavior of Pipeline Steels ...

177

A Precise Open-Loop Torque Control for an Interior Permanent Magnet Synchronous Motor  

E-Print Network (OSTI)

A Precise Open-Loop Torque Control for an Interior Permanent Magnet Synchronous Motor (IPMSM@lea.upb.de Abstract-Interior permanent magnet synchronous motors (IPMSM) are preferentially chosen as traction drives. INTRODUCTION Interior permanent magnet synchronous motors (IPMSM) provide high power and torque densities

Noé, Reinhold

178

Precise and Accurate Density Determination of Explosives Using Hydrostatic Weighing  

SciTech Connect

Precise and accurate density determination requires weight measurements in air and water using sufficiently precise analytical balances, knowledge of the densities of air and water, knowledge of thermal expansions, availability of a density standard, and a method to estimate the time to achieve thermal equilibrium with water. Density distributions in pressed explosives are inferred from the densities of elements from a central slice.

B. Olinger

2005-07-01T23:59:59.000Z

179

Remote Sensing Tools Can Add Precision to Your Farming Operation  

E-Print Network (OSTI)

Remote Sensing Tools Can Add Precision to Your Farming Operation Harold Kaufman, Terry Wheeler is therefore important for the success of precision agriculture on individual farms. Remote sensing is a method.digitalglobe.com). However, the most inexpensive method of remote sensing is to shoot infrared images with a 35mm camera

Mukhtar, Saqib

180

5. oktober 2009 Precision control of biogas plants  

E-Print Network (OSTI)

5. oktober 2009 Precision control of biogas plants Final report Henrik B. Møller, Anders M. Nielsen: "Precision control of biogas plants", J. Nr. 33031-0028, funded by EUDP 2005. The final report consists. Danish summary of the results: Det har været formålet at udvikle drift og design af biogas anlæg med

Note: This page contains sample records for the topic "high precision tester" 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

Precision selection for energy-efficient pixel shaders  

Science Conference Proceedings (OSTI)

In this work, we seek to realize energy savings in modern pixel shaders by reducing the precision of their arithmetic. We explore three schemes for controlling this reduction. The first is a static analysis technique, which analyzes shader programs to ... Keywords: energy efficient, pixel shader, variable precision

Jeff Pool; Anselmo Lastra; Montek Singh

2011-08-01T23:59:59.000Z

182

Training ultra precision engineers for UK manufacturing industry  

Science Conference Proceedings (OSTI)

Ultra Precision Engineers are in demand in both UK and European manufacturing industries. Engineering Companies can address this skills shortage by training existing staff or recruiting new staff with the appropriate skills. Since companies are understandably ... Keywords: Higher education, Industry, Knowledge transfer, Postgraduate, Precision engineering

Christopher Sansom; Paul Shore

2013-06-01T23:59:59.000Z

183

Review: Sensing technologies for precision specialty crop production  

Science Conference Proceedings (OSTI)

With the advances in electronic and information technologies, various sensing systems have been developed for specialty crop production around the world. Accurate information concerning the spatial variability within fields is very important for precision ... Keywords: Precision agriculture, Review, Sensing, Specialty crop

W. S. Lee; V. Alchanatis; C. Yang; M. Hirafuji; D. Moshou; C. Li

2010-10-01T23:59:59.000Z

184

Precision shape modification of nanodevices with a low-energy electron beam  

DOE Patents (OSTI)

Methods of shape modifying a nanodevice by contacting it with a low-energy focused electron beam are disclosed here. In one embodiment, a nanodevice may be permanently reformed to a different geometry through an application of a deforming force and a low-energy focused electron beam. With the addition of an assist gas, material may be removed from the nanodevice through application of the low-energy focused electron beam. The independent methods of shape modification and material removal may be used either individually or simultaneously. Precision cuts with accuracies as high as 10 nm may be achieved through the use of precision low-energy Scanning Electron Microscope scan beams. These methods may be used in an automated system to produce nanodevices of very precise dimensions. These methods may be used to produce nanodevices of carbon-based, silicon-based, or other compositions by varying the assist gas.

Zettl, Alex (Kensington, CA); Yuzvinsky, Thomas David (Berkeley, CA); Fennimore, Adam (Berkeley, CA)

2010-03-09T23:59:59.000Z

185

Precision Measurements of Tau Lepton Decays  

SciTech Connect

Using data collected with the BABAR detector at the SLAC PEP-II electron-positron storage ring operating at a center-of-mass energy near 10.58 GeV, the branching fractions {Beta}({tau}{sup -} {yields} {pi}{sup -}{pi}{sup -}{pi}{sup +}{nu}{sub {tau}}) = (8.83 {+-} 0.01 {+-} 0.13)%, {Beta}({tau}{sup -} {yields} K{sup -}{pi}{sup -}{pi}{sup +}{nu}{sub {tau}}) = (0.273 {+-} 0.002 {+-} 0.009)%, {Beta}({tau}{sup -} {yields} K{sup -}{pi}{sup -}K{sup +}{nu}{sub {tau}}) = (0.1346 {+-} 0.0010 {+-} 0.0036)%, and {Beta}({tau}{sup -} {yields} K{sup -}K{sup -}K{sup +}{nu}{sub {tau}}) = (1.58 {+-} 0.13 {+-} 0.12) x 10{sup -5} are measured where the uncertainties are statistical and systematic, respectively. The invariant mass distribution for the {tau}{sup -} {yields} {pi}{sup -}{pi}{sup -}{pi}{sup +}{nu}{sub {tau}} {yields} K{sup -}{pi}{sup -}{pi}{sup +}{nu}{sub {tau}}, {tau}{sup -} {yields} K{sup -}{pi}{sup -}K{sup +}{nu}{sub {tau}} and {tau}{sup -} {yields} K{sup -}K{sup -}K{sup +}{nu}{sub {tau}} decays are unfolded to correct for detector effects. A measurement of {Beta}({tau}{sup -} {yields} {phi}{pi}{sup -}{nu}{sub {tau}}) = (3.42 {+-} 0.55 {+-} 0.25) x 10{sup -5}, a measurement of {Beta}({tau}{sup -} {yields} {phi}K{sup -}{nu}{sub {tau}}) = (3.39 {+-} 0.20 {+-} 0.28) x 10{sup -5} and an upper limit on {Beta}({tau}{sup -} {yields} K{sup -}K{sup -}K{sup +}{nu}{sub {tau}}[ex.{phi}]) {le} 2.5 x 10{sup -6} {at} 905 CL are determined from a binned maximum likelihood fit of the {tau}{sup -} {yields} K{sup -}{pi}{sup -}K{sup +}{nu}{sub {tau}} and {tau}{sup -} {yields} K{sup -}K{sup -}K{sup +}{nu}{sub {tau}} K{sup +}K{sup -} invariant mass distributions. The branching ratio {Beta}({tau}{sup -} {yields} K{sup -}{nu}{sub {tau}})/{Beta}({tau}{sup -} {yields} {pi}{sup -}{nu}{sub {tau}}) is measured to be (6.531 {+-} 0.056 {+-} 0.093) x 10{sup -2} from which |V{sub us}| is determined to be 0.2255 {+-} 0.0023. The branching ratio {Beta}/({tau}{sup -} {yields} {mu}{nu}{sub {tau}}{bar {nu}}{sub {mu}})/{Beta}({tau}{sup -} {yields} e{sup -} {nu}{sub {tau}}{bar {nu}}{sub e}) = (9.796 {+-} 0.016 {+-} 0.035) x 10{sup -1} is measured enabling a precision test of the Standard Model assumption of charged current lepton universality, g{sub {mu}}/g{sub e} = 1.0036 {+-} 0.0020. The branching ratios {Beta}({tau}{sup -} {yields} K{sup -}{nu}{sub {tau}})/{Beta}({tau}{sup -} {yields} e{sup -}{nu}{sub {tau}}{bar {nu}}{sub e}) = (3.882 {+-} 0.032 {+-} 0.057) x 10{sup -2}, and {Beta}({tau}{sup -} {yields} {pi}{sup -}{nu}{sub {tau}})/{Beta}({tau}{sup -} {yields} e{nu}{sub {tau}}{bar {nu}}{sub e}) = (5.9545 {+-} 0.014 {+-} 0.061) x 10{sup -1} are measured which provide additional tests of charged current lepton universality, (g{sub {tau}}/g{sub {mu}}){sub {pi}} = 0.9856 {+-} 0.0057 and (g{sub {tau}}/g{sub {mu}}){sub K} = 0.9827 {+-} 0.0086 which can be combined to give (g{sub {tau}}/g{sub {mu}}){sub {pi}/K} = 0.9850 {+-} 0.0054. Any deviation of these measurements from the expected Standard Model values would be an indication of new physics.

Nugent, Ian M.; /Victoria U.

2010-03-16T23:59:59.000Z

186

Prospects For Precision Measurements with Reactor Antineutrinos at Daya Bay  

E-Print Network (OSTI)

In 2012 the Daya Bay experiment made an unambiguous observation of reactor antineutrino disappearance over kilometer-long baselines and determined that the neutrino mixing angle $\\theta_{13}$ is non-zero. The measurements of Daya Bay have provided the most precise determination of $\\theta_{13}$ to date. This whitepaper outlines the prospects for precision studies of reactor antineutrinos at Daya Bay in the coming years. This includes precision measurements of sin$^2 2\\theta_{13}$ and $\\Delta m^2_{ee}$ to $reactor flux and spectrum, and non-standard physics searches.

The Daya Bay Collaboration

2013-09-30T23:59:59.000Z

187

Precision electronic speed controller for an alternating-current  

DOE Patents (OSTI)

A high precision controller for an alternating-current multi-phase electrical motor that is subject to a large inertial load. The controller was developed for and is particularly suitable for controlling, in a neutron chopper system, a heavy spinning rotor that must be rotated in phase-locked synchronism with a reference pulse train that is representative of an ac power supply signal having a meandering line frequency. The controller includes a shaft revolution sensor which provides a feedback pulse train representative of the actual speed of the motor. An internal digital timing signal generator provides a reference signal which is compared with the feedback signal in a computing unit to provide a motor control signal. In the preferred embodiment, the motor control signal is a weighted linear sum of a speed error voltage, a phase error voltage, and a drift error voltage, each of which is computed anew with each revolution of the motor shaft. The stator windings of the motor are driven by two amplifiers which are provided with input signals having the proper quadrature relationship by an exciter unit consisting of a voltage controlled oscillator, a binary counter, a pair of readonly memories, and a pair of digital-to-analog converters.

Bolie, Victor W. (Albuquerque, NM)

1988-01-01T23:59:59.000Z

188

Correlation between precision gravity and subsidence measurements at Cerro Prieto  

DOE Green Energy (OSTI)

Precision gravity measurements were made in the region of the Cerro Prieto geothermal field at yearly intervals from 1977 to 1981 to assess the feasibility of using gravity to determine subsurface reservoir changes with time. The extent of mass recharge in response to the continued production of fluids from this field was studied. Changes in gravity and ground elevation were observed throughout the region for the period of observation. Results indicate that the largest changes observed were the result of the Magnitude 6.1 (Caltech) Victoria earthquake of 8 June 1980. The epicenter of this earthquake was located 25 km southeast of the field on the Cerro Prieto Fault, which bounds the field on the southwest. Subsidence of up to 55 cm was measured east of the power plant, in the region between the northern end of the Cerro Prieto Fault and the southern end of the Imperial Fault. This area has been postulated to be the site of an active spreading center or pull-apart basin, and has been characterized by a high level of seismic activity during the last 10 years. Minor subsidence and small related gravity changes for the period preceeding the Victoria earthquake suggest that in spite of large fluid production rates, the reservoir is being almost completely recharged and that a measurable increase in subsurface density may be taking place. The results of measurements of horizontal ground motions made in this area are discussed in relation to the gravity and subsidence observations.

Zelwer, R.; Grannell, R.B.

1982-10-01T23:59:59.000Z

189

Constraints on proton structure from precision atomic physics measurements  

DOE Green Energy (OSTI)

The ground-state hyperfine splittings in hydrogen and muonium are extremely well measured. The difference between them, after correcting for the different magnetic moments of the muon and proton and for reduced mass effects, is due solely to the structure of the proton - the large QED contributions for a pointlike nucleus essentially cancel. A major contribution to the rescaled hyperfine difference is proportional to the Zemach radius, a fundamental measure of the proton which can be computed as an integral over the product of the elastic electric and magnetic form factors of the proton. The remaining proton structure corrections, the polarization contribution from inelastic states in the spin-dependent virtual Compton amplitude and the proton size dependence of the relativistic recoil corrections, have small uncertainties. The resulting high precision determination of the Zemach radius (1.013 {+-} 0.016) fm from atomic physics provides an important constraint on fits to accelerator measurements of the proton electric and magnetic form factors. Conversely, the authors use the muonium data to extract an 'experimental' value for the QED corrections to the hyperfine splitting of hydrogenic atoms. There is a significant discrepancy between measurement and theory which is in the same direction as a corresponding discrepancy in positronium.

Brodsky, S

2004-08-10T23:59:59.000Z

190

Precise reddening and metallicity of NGC6752 from FLAMES spectra  

E-Print Network (OSTI)

(abridged) Accurate reddenings for Globular Clusters could be obtained by comparing the colour-temperature obtained using temperatures from reddening-free indicator (Halpha), with that given by standard colour-temperature calibrations. From a single 1300 seconds exposure with FLAMES at VLT2 we obtained spectra centred on Halpha (R=6000, 5high precision reddening estimate has been obtained for the cluster: E(B-V)=0.046 +/- 0.005. The same exposure provided UVES spectra of seven stars near the red giant branch bump (R=40000, 20

Gratton, R G; Carretta, E; De Angeli, F; Lucatello, S; Momany, Y; Piotto, G; Recio-Blanco, A

2005-01-01T23:59:59.000Z

191

Electroweak Precision Measurements and Collider Probes of the Standard Model with Large Extra Dimensions  

SciTech Connect

The elementary particles of the Standard Model may live in more than 3+1 dimensions. We study the consequences of large compactified dimensions on scattering and decay observables at high-energy colliders. Our analysis includes global fits to electroweak precision data, indirect tests at high-energy electron-positron colliders (LEP2 and NLC), and direct probes of the Kaluza-Klein resonances at hadron colliders (Tevatron and LHC). The present limits depend sensitively on the Higgs sector, both the mass of the Higgs boson and how many dimensions it feels. If the Higgs boson is trapped on a 3+1 dimensional wall with the fermions, large Higgs masses (up to 500 GeV) and relatively light Kaluza-Klein mass scales (less than 4 TeV) can provide a good fit to precision data. That is, a light Higgs boson is not necessary to fit the electroweak precision data, as it is in the Standard Model. If the Higgs boson propagates in higher dimensions, precision data prefer a light Higgs boson (less than 260 GeV), and a higher compactification scale (greater than 3.8 TeV). Future colliders can probe much larger scales. For example, a 1.5 TeV electron-positron linear collider can indirectly discover Kaluza-Klein excitations up to 31 TeV if 500 fb{sup {minus}1} integrated luminosity is obtained.

Rizzo, Thomas G.

1999-06-03T23:59:59.000Z

192

Modeling and precision control of ionic polymer metal composite  

E-Print Network (OSTI)

This thesis describes the open-loop behavior of an ionic polymer metal composite (IPMC) strip as a novel actuator, the empirical force and position models, the control system and the improved dynamic characteristics with the feedback control implemented. Ionic polymer metal composite is a novel polymer in the class of electroactive polymers. IPMC consists of a base polymer coated with electrodes made up of highly conducting pure metals such as gold. The actuation behavior of IPMC can be attributed to the bending of an IPMC strip upon application of voltage across its thickness. The main reasons for the bending are ion migration on the application of voltage and swelling and contraction caused by water content. An experimental setup to study the open-loop force and tip displacement of an IPMC strip in a cantilever configuration was developed, and real time controllers were implemented. In open loop, the force response of the IPMC strip of dimensions 25 mm x 3.9 mm x 0.16 mm to a 1.2-V step input is studied. The open-loop rise time was 0.08 s and the percent overshoot was 131.62 %, while the settling time was about 10 s. Based on this open-loop step response using a least-square curve-fitting methodology, a fourth-order empirical transfer function from the voltage input to the force output was derived. The tip displacement response of an IPMC strip of dimensions 23 mm x 3.96 mm x 0.16 mm to a 1.2-V step input was also studied. The step response exhibited a 205.34 % overshoot with a rise time of 0.08 s, and the settling time was 27 s. A fourth-order empirical transfer function from the step input to the tip displacement as output was also derived. Based on the derived transfer functions lead-lag feedback controllers were designed for precision control of both force and displacement. The control objectives were to decrease the settling time and the percent overshoot, and achieve reference input tracking. After implementing the controllers, the percent overshoot decreased to 30% while the settling time was reduced to 1.5 s in case of force control. With position control, the settling time was reduced to 1 s while the percent overshoot decreased to 20%. Precision micro-scale force and position-control capabilities of the IPMC were also demonstrated. A 4 ?N force resolution was achieved, with a force noise of 0.904-?N rms. The position resolution was 20 ?m with a position noise of 7.6-?m rms.

Bhat, Nikhil Dilip

2003-08-01T23:59:59.000Z

193

DOE - Office of Legacy Management -- Precision Extrusion Co - IL 20  

NLE Websites -- All DOE Office Websites (Extended Search)

Precision Extrusion Co - IL 20 Precision Extrusion Co - IL 20 FUSRAP Considered Sites Site: PRECISION EXTRUSION CO. (IL.20) Eliminated from further consideration under FUSRAP Designated Name: Not Designated Alternate Name: None Location: 720 East Green Avenue , Bensenville , Illinois IL.20-1 Evaluation Year: 1987 IL.20-2 Site Operations: 1956-1959, metal fabrication - extruded uranium billets. IL.20-1 Site Disposition: Eliminated - Potential for contamination considered remote based on limited quantities of materials handled at the site IL.20-2 Radioactive Materials Handled: Yes IL.20-1 Primary Radioactive Materials Handled: Uranium IL.20-1 Radiological Survey(s): Yes IL.20-3 Site Status: Eliminated from further consideration under FUSRAP Also see Documents Related to PRECISION EXTRUSION CO.

194

Precision gravity studies at Cerro Prieto: the second year  

DOE Green Energy (OSTI)

Precision gravity measurements were initiated at Cerro Prieto in 1978. Interpretation of the first annual repetition of the measurements is presented. Field procedures, data reduction, and data interpretation are reviewed briefly. (MHR)

Grannell, R.B.; Tarman, D.W.; Clover, R.C.; Leggewie, R.M.; Aronstam, P.S.; Kroll, R.C.; Eppink, J.

1980-02-01T23:59:59.000Z

195

Correlation Between Precision Gravity and Subsidence Measurements at Cerro Prieto  

E-Print Network (OSTI)

PRECISION GRAVITY AND SUBSIDENCE MEASUREMENTS AT CERROPRECISION GRAVITY AND SUBSIDENCE MEASUREMENTS AT CERROn d i c a t e s t h a t subsidence took place. Uost of t h e

Zelwer, R.

2010-01-01T23:59:59.000Z

196

Precise goal-independent abstract interpretation of constraint logic programs  

Science Conference Proceedings (OSTI)

We present a goal-independent abstract interpretation framework for constraint logic programs, and prove the sufficiency of a set of conditions for abstract domains to ensure that the analysis will never lose precision. Along the way, we formally define ...

Peter Schachte

2003-02-01T23:59:59.000Z

197

Evaluation of high temperature lubricants for downhole motors in geothermal applications  

DOE Green Energy (OSTI)

A Bearing-Seal Package is being developed for use with downhole motors and turbines for drilling geothermal wells. The lubricant will be sealed in the bearing section which will allow the bearings to operate directly in the lubricant. The development of the Bearing-Seal Package involves the improvement of high temperature seals and lubricants. Candidate high temperature lubricants were tested in the High Temperature Lubricant Tester under elevated temperatures and pressures. A list of candidate high temperature lubricants, a description of the lubricant test program, and the lubricant test results are presented.

DeLafosse, P.H.; Tibbitts, G.A.; Green, S.J.

1979-01-01T23:59:59.000Z

198

Lumitrack: low cost, high precision, high speed tracking with projected m-sequences  

Science Conference Proceedings (OSTI)

We present Lumitrack, a novel motion tracking technology that uses projected structured patterns and linear optical sensors. Each sensor unit is capable of recovering 2D location within the projection area, while multiple sensors can be combined for ... Keywords: input devices, optical tracking, structured light

Robert Xiao, Chris Harrison, Karl D.D. Willis, Ivan Poupyrev, Scott E. Hudson

2013-10-01T23:59:59.000Z

199

Precision timing of PSR J1012+5307 and strong-field GR tests  

E-Print Network (OSTI)

We report on the high precision timing analysis of the pulsar-white dwarf binary PSR J1012+5307. Using 15 years of multi-telescope data from the European Pulsar Timing Array (EPTA) network, a significant measurement of the variation of the orbital period is obtained. Using this ideal strong-field gravity laboratory we derive theory independent limits for both the dipole radiation and the variation of the gravitational constant.

Lazaridis, Kosmas; Jessner, Axel; Kramer, Michael; Zensus, J Anton; Stappers, Ben W; Janssen, Gemma H; Purver, Mark B; Lyne, Andrew G; Jordan, Christine A; Desvignes, Gregory; Cognard, Ismael; Theureau, Gilles

2010-01-01T23:59:59.000Z

200

Precision timing of PSR J1012+5307 and strong-field GR tests  

E-Print Network (OSTI)

We report on the high precision timing analysis of the pulsar-white dwarf binary PSR J1012+5307. Using 15 years of multi-telescope data from the European Pulsar Timing Array (EPTA) network, a significant measurement of the variation of the orbital period is obtained. Using this ideal strong-field gravity laboratory we derive theory independent limits for both the dipole radiation and the variation of the gravitational constant.

Kosmas Lazaridis; Norbert Wex; Axel Jessner; Michael Kramer; J. Anton Zensus; Ben W. Stappers; Gemma H. Janssen; Mark B. Purver; Andrew G. Lyne; Christine A. Jordan; Gregory Desvignes; Ismael Cognard; Gilles Theureau

2010-01-26T23:59:59.000Z

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201

ARM - Field Campaign - Precision Gas Sampling (PGS) Validation Field  

NLE Websites -- All DOE Office Websites (Extended Search)

govCampaignsPrecision Gas Sampling (PGS) Validation Field Campaign govCampaignsPrecision Gas Sampling (PGS) Validation Field Campaign Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Campaign : Precision Gas Sampling (PGS) Validation Field Campaign 2006.01.01 - 2006.12.31 Lead Scientist : Marc Fischer For data sets, see below. Description Accurate prediction of the regional responses of CO2 flux to changing climate, land use, and management requires models that are parameterized and tested against measurements made in multiple land cover types and over seasonal to inter-annual time scales. In an extension of our earlier work on crop systems, we investigated the effects of burning on the cycles of carbon, water, and energy in an example of grazed land of the Southern Great Plains. In collaboration with Dr. Herman Mayeux, of the USDA Grazing

202

Precise Gravimetry and Geothermal Reservoir Management | Open Energy  

Open Energy Info (EERE)

Precise Gravimetry and Geothermal Reservoir Management Precise Gravimetry and Geothermal Reservoir Management Jump to: navigation, search OpenEI Reference LibraryAdd to library Conference Paper: Precise Gravimetry and Geothermal Reservoir Management Abstract Modern portable gravimeters can routinely achieve a5 ugal uncertainty with careful measurementprocedures involving multiple station occupations inthe same day, and stacking of readings over at least15 minutes during each occupation. Although furtherimprovements in gravimeter accuracy are feasible,other practical factors relating to repeat surveys ofgeothermal fields make such improvements oflimited value. The two most important factors arebenchmark elevation variations (3 ugal/cm) andgroundwater level fluctuations (5-10 ugal/m). Dualfrequency GPS receivers can give elevations

203

ARM - Field Campaign - Precision Gas Sampling (PGS) Validation Field  

NLE Websites -- All DOE Office Websites (Extended Search)

govCampaignsPrecision Gas Sampling (PGS) Validation Field Campaign govCampaignsPrecision Gas Sampling (PGS) Validation Field Campaign Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Campaign : Precision Gas Sampling (PGS) Validation Field Campaign 2003.04.02 - 2003.09.02 Lead Scientist : Marc Fischer For data sets, see below. Description Ecosystem-atmosphere exchange of carbon, water, and energy varies with climate, soil, and land management, in ways 1) that influence the CO2 flux and planetary boundary layer CO2 concentration in ARM CART and 2) that we can model and predict. This activity repeated portable flux system measurements that we performed in spring 2002, by continuing measurements of the spatial heterogeneity of carbon, water, and energy fluxes in fields surrounding the ARM SGP Central Facility (CF).

204

ARM - Field Campaign - Precision Gas Sampling (PGS) Validation Field  

NLE Websites -- All DOE Office Websites (Extended Search)

govCampaignsPrecision Gas Sampling (PGS) Validation Field Campaign govCampaignsPrecision Gas Sampling (PGS) Validation Field Campaign Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Campaign : Precision Gas Sampling (PGS) Validation Field Campaign 2004.04.15 - 2004.12.15 Lead Scientist : Marc Fischer For data sets, see below. Description Accurate prediction of the regional responses of CO2 flux to changing climate, land use, and management requires models that are parameterized and tested against measurements made in multiple land cover types and over seasonal to inter-annual time scales. Models predicting fluxes for un-irrigated agriculture were posed with the challenge of characterizing the onset and severity of plant water stress. We conducted a study that quantified the spatial heterogeneity and temporal variations in land

205

A non-destructive transformer oil tester  

E-Print Network (OSTI)

A new non-destructive test of transformer oil dielectric strength is a promising technique to automate and make more reliable a diagnostic that presently involves intensive manual efforts. This thesis focuses some of the ...

Cargol, Timothy L. (Timothy Lawrence), 1976-

2000-01-01T23:59:59.000Z

206

Method for making precisely configured flakes useful in optical devices  

DOE Patents (OSTI)

Precisely configured, especially of geometric shape, flakes of liquid crystal material are made using a mechanically flexible polymer mold with wells having shapes which are precisely configured by making the mold with a photolithographically manufactured or laser printed master. The polymer liquid crystal is poured into the wells in the flexible mold. When the liquid crystal material has solidified, the flexible mold is bent and the flakes are released and collected for use in making an electrooptical cell utilizing the liquid crystal flakes as the active element therein.

Trajkovska-Petkoska, Anka (Rochester, NY); Jacobs, Stephen D. (Pittsford, NY); Kosc, Tanya Z. (Rochester, NY); Marshall, Kenneth L. (Rochester, NY)

2007-07-03T23:59:59.000Z

207

Precise Measurement of Laser Power using an Optomechanical System  

E-Print Network (OSTI)

This paper shows a novel method to precisely measure the laser power using an optomechanical system. By measuring a mirror displacement caused by the reflection of an amplitude modulated laser beam, the number of photons in the incident continuous-wave laser can be precisely measured. We have demonstrated this principle by means of a prototype experiment uses a suspended 25 mg mirror as an mechanical oscillator coupled with the radiation pressure and a Michelson interferometer as the displacement sensor. A measurement of the laser power with an uncertainty of less than one percent (1 sigma) is achievable.

Agatsuma, Kazuhiro; Ballmer, Stefan; DeSalvo, Giulia; Sakata, Shihori; Nishida, Erina; Kawamura, Seiji

2013-01-01T23:59:59.000Z

208

Precise Measurement of Laser Power using an Optomechanical System  

E-Print Network (OSTI)

This paper shows a novel method to precisely measure the laser power using an optomechanical system. By measuring a mirror displacement caused by the reflection of an amplitude modulated laser beam, the number of photons in the incident continuous-wave laser can be precisely measured. We have demonstrated this principle by means of a prototype experiment uses a suspended 25 mg mirror as an mechanical oscillator coupled with the radiation pressure and a Michelson interferometer as the displacement sensor. A measurement of the laser power with an uncertainty of less than one percent (1 sigma) is achievable.

Kazuhiro Agatsuma; Daniel Friedrich; Stefan Ballmer; Giulia DeSalvo; Shihori Sakata; Erina Nishida; Seiji Kawamura

2013-09-18T23:59:59.000Z

209

high  

Gasoline and Diesel Fuel Update (EIA)

0 0 Summary Our short-term outlook for a wide array of energy prices has been adjusted upward as international and domestic energy supply conditions have tightened. We think that crude oil prices are as likely as not to end the year $2 to $3 per barrel higher than our previous projections. Thus, we think that the probability of West Texas Intermediate costing an average of $30 per barrel or more at midwinter is about 50 percent. On their current track, heating oil prices are likely to be about 30 percent above year-ago levels in the fourth quarter. Prices for Q1 2001 seem more likely now to match or exceed the high level seen in Q1 2000. Tight oil markets this year and an inherent propensity for high gas utilization in incremental power supply have resulted in rising North American natural gas

210

Annexes  

Science Conference Proceedings (OSTI)

... Impulse testers High-voltage impulse testers (1975) [0.4 MB]. TCL generator Transient control level test generators (1977) [01.1 MB]. ...

211

Precise time and space simulatable zero-knowledge  

Science Conference Proceedings (OSTI)

Traditionally, the definition of zero-knowledge states that an interactive proof of x ? L provides zero (additional) knowledge if the view of any polynomial-time verifier can be reconstructed by a polynomialtime simulator. Since this ... Keywords: precise zero-knowledge, proofs of knowledge, zero-knowledge

Ning Ding; Dawu Gu

2011-10-01T23:59:59.000Z

212

Automatic detection of wheat flour precision based on Image processing  

Science Conference Proceedings (OSTI)

In order to efficient, objective and comprehensive assessment of wheat flour processing accuracy, this paper introduces a new method to detect the wheat flour processing precision; it uses wheat flour three features of Whiteness, color, bran to design ... Keywords: ant colony algorithm, color feature, fuzzy C-means, fuzzy recognition

Liu YanLi; Zhang HongMei; Wang TieJian

2010-03-01T23:59:59.000Z

213

A handy imaging system for precision agriculture studies  

Science Conference Proceedings (OSTI)

An inexpensive imaging system able to take various narrow-band images and placed on platforms of various heights can be very useful to many remote-sensing studies, particularly for researchers in precision agriculture areas. A handy imaging system, composed ...

Y. J. Lee; K. W. Chang; Y. Shen; T. M. Huang; H. L. Tsay

2007-10-01T23:59:59.000Z

214

VLIW coprocessor for IEEE-754 quadruple-precision elementary functions  

Science Conference Proceedings (OSTI)

In this article, a unified VLIW coprocessor, based on a common group of atomic operation units, for Quad arithmetic and elementary functions (QP_VELP) is presented. The explicitly parallel scheme of VLIW instruction and Estrin's evaluation scheme for ... Keywords: QP_VELP, Quadruple precision floating-point, elementary function, very long instruction word

Yuanwu Lei, Yong Dou, Lei Guo, Jinbo Xu, Jie Zhou, Yazhuo Dong, Hongjian Li

2013-09-01T23:59:59.000Z

215

FastTrack: efficient and precise dynamic race detection  

Science Conference Proceedings (OSTI)

\\begin{abstract} Multithreaded programs are notoriously prone to race conditions. Prior work on dynamic race detectors includes fast but imprecise race detectors that report false alarms, as well as slow but precise race detectors that never report false ... Keywords: concurrency, dynamic analysis, race conditions

Cormac Flanagan; Stephen N. Freund

2009-06-01T23:59:59.000Z

216

Precision-analog fiber-optic transmission system  

SciTech Connect

This article describes the design, experimental development, and construction of a DC-coupled precision analog fiber optic link. Topics to be covered include overall electrical and mechanical system parameters, basic circuit organization, modulation format, optical system design, optical receiver circuit analysis, and the experimental verification of the major design parameters.

Stover, G.

1981-06-01T23:59:59.000Z

217

Precise and efficient groundness analysis for logic programs  

Science Conference Proceedings (OSTI)

We show how precise groundness information can be extracted from logic programs. The idea is to use abstract interpretation with Boolean functions as “approximations” to groundness dependencies between variables. This idea is not new, and ... Keywords: abstract interpretation, condensation, groundness analysis, propositional logic

Kim Marriott; Harald Søndergaard

1993-03-01T23:59:59.000Z

218

Precise root-mean-square radius of {sup 4}He  

SciTech Connect

We study the world data on elastic electron-helium scattering to determine the {sup 4}He charge root-mean-square radius. A precise value for this radius is needed as a reference for a number of ongoing studies in nuclear and atomic physics.

Sick, Ingo [Dept. fuer Physik, Universitaet Basel, CH4056 Basel (Switzerland)

2008-04-15T23:59:59.000Z

219

ORKA, The Golden Kaon Experiment: Precision measurement of K+ -> pi+nunubar and other rare processes  

E-Print Network (OSTI)

ORKA is a proposed experiment to measure the K+ -> pi+nunubar branching ratio with 5% precision using the Fermilab Main Injector high-intensity proton source. The detector design is based on the BNL E787/E949 experiments, which detected seven K+ -> pi+nunubar candidate events. ORKA is expected to acheive two orders of magnitude improvement in sensitivity relative to the BNL experiments as a result of enhancements to the beam line and the detector acceptance. Precise measurement of the K+ -> pi+nunubar branching ratio with the same level of uncertainty as the well-understood Standard Model prediction allows for sensitivity to new physics at and beyond the LHC mass scale. Detector R&D, simulation-based optimization of the experiment design, and preparation of the experiment location are underway.

E. T. Worcester for the ORKA collaboration

2013-05-30T23:59:59.000Z

220

Shock timing on the National Ignition Facility: the first precision tuning series  

Science Conference Proceedings (OSTI)

Ignition implosions on the National Ignition Facility (NIF) [Lindl et al., Phys. Plasmas 11, 339 (2004)] are driven with a very carefully tailored sequence of four shock waves that must be timed to very high precision in order to keep the fuel on a low adiabat. The first series of precision tuning experiments on NIF have been performed. These experiments use optical diagnostics to directly measure the strength and timing of all four shocks inside the hohlraum-driven, cryogenic deuterium-filled capsule interior. The results of these experiments are presented demonstrating a significant decrease in the fuel adiabat over previously un-tuned implosions. The impact of the improved adiabat on fuel compression is confirmed in related deuterium-tritium (DT) layered capsule implosions by measurement of fuel areal density (rR), which show the highest fuel compression (rR {approx} 1.0 g/cm{sup 2}) measured to date.

Robey, H F; Celliers, P M; Kline, J L; Mackinnon, A J

2011-10-27T23:59:59.000Z

Note: This page contains sample records for the topic "high precision tester" 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
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221

high  

Gasoline and Diesel Fuel Update (EIA)

0 0 Highlights International Oil Markets Prices. We have raised our world oil price projection by about $2 per barrel for this month because of assumed greater compliance by OPEC to targeted cuts, especially for the second quarter of 2000 (Figure 1). The expected decline in world petroleum inventories continues (Figure 2), and, given the generally stiff resolve of OPEC members to maintain production cuts, any sign of a turnaround in stocks may be postponed until later this year than previously assumed (Q3 instead of Q2). Our current estimate for the average import cost this past January is now $25 per barrel, a nearly $15-per-barrel increase from January 1999. Crude oil prices are expected to remain at relatively high levels for the first half of 2000, but

222

Repetitive precision gravity studies at the Cerro Prieto and Heber geothermal fields  

DOE Green Energy (OSTI)

To study subsidence and mass removal, a precise gravity network was established on 60 permanent monuments in the Cerro Prieto geothermal field in early 1978, and repeated annually through early 1981; the survey was tied to two bedrock sites outside the limits of the current production zone. The looping technique of station occupation was utilized, in which occupation of the base was followed by occupation of several stations, followed by a return to the base. Use of two LaCoste and Romberg gravity meters, and replication of values within loops as well as entire loops, enhanced precision such that the median standard deviations of the base-to-station differences, reduced to observed gravity values, ranged from 7 to 15 microgals for individual surveys. The smaller values were obtained as field and data reduction techniques were improved and experience was gained. A similar survey was initiated in the Heber area just north of the Mexican border in early 1980. It too was established on permanent monuments, was tied to bedrock stations outside the geothermal area, and used multiple repetitions of values with two meters to achieve high precision.

Grannell, R.B.

1982-09-01T23:59:59.000Z

223

NREL: News Feature - Biomass Analysis Tool Is Faster, More Precise  

NLE Websites -- All DOE Office Websites (Extended Search)

Biomass Analysis Tool Is Faster, More Precise Biomass Analysis Tool Is Faster, More Precise February 26, 2013 Photo of a left hand holding a rectangular tray that has 48 cups, each holding a small amount of a biomass sample. Below the tray is a slice of a poplar tree, about an inch thick and a foot in diameter. Enlarge image This tray of 80-milliliter samples was taken from a standard poplar tree, such as the one pictured here. It is ready to be loaded into NREL's molecular beam mass spectrometer for rapid analysis of the cell wall chemistry of each sample. Credit: Dennis Schroeder A screening tool from the U.S. Department of Energy's National Renewable Energy Laboratory (NREL) eases and greatly quickens one of the thorniest tasks in the biofuels industry: determining cell wall chemistry to find plants with ideal genes.

224

Precise time synchronization data acquisition with remote systems  

DOE Green Energy (OSTI)

Researchers at the National Wind Technology Center have identified a need to acquire data on the rotor of an operating wind turbine at precisely the same time as other data is acquired on the ground or on a non-rotating part of the wind turbine. The researchers will analyze that combined data with statistical and correlation techniques to clearly establish phase information and loading paths and insights into the structural loading of wind turbines. A data acquisition unit has been developed to acquire the data from the rotating system at precise universal times specified by the user. The unit utilizes commercial data acquisition hardware, spread-spectrum radio modems, and a Global Positioning Satellite receiver as well as a custom-built programmable logic device. A prototype of the system is now operational, and initial field deployment is anticipated this summer.

Berg, D.E.; Robertson, P.J.

1998-08-01T23:59:59.000Z

225

Precision blasting in shadow of on-line plant  

SciTech Connect

Despite significant restrictions imposed on the how, where, when, and the blast forces involved, a precisely controlled blasting project has permitted the successful excavation of over 77,000 cu yd of rock for the total job, including an excavation hole about 160-170 ft in diameter and 40-50 ft deep. The excavation was required for the preparation of foundations for a nuclear unit currently being built in the shadow of two existing operating nuclear plants. Blasting procedures are described.

Barlow, G.R. Jr.

1979-02-01T23:59:59.000Z

226

Precision spectroscopic measurements in few-electron ions  

SciTech Connect

We describe recent precision experiments in few-electron ions including measurements of the lifetimes of two-photon-emitting levels in Ni{sup 26+} and Ni{sup 27+}, a measurement of the lifetime of the 2{sup 3}S{sub 1} level in Br{sup 33+} and measurements of the 2{sup 3}S{sub 1} {yields} 2{sup 3}{sub 0,1,2} transition energies in B{sup 3+}. 13 refs., 4 figs.

Dunford, R.W.; Berry, H.G.; Church, D.A.; Dinneen, T.P.; Hass, M.; Liu, C.J.; Berrah-Mansour, N.; Pardo, R.C.; Raphaelian, M.L.A.; Young, L.; Zabransky, B.J. (Argonne National Lab., IL (USA)); Curtis, L.J. (Toledo Univ., OH (USA). Dept. of Physics and Astronomy)

1990-01-01T23:59:59.000Z

227

The on-line charge breeding program at TRIUMF's Ion Trap For Atomic and Nuclear Science for precision mass measurements  

Science Conference Proceedings (OSTI)

TRIUMF's Ion Trap for Atomic and Nuclear science (TITAN) constitutes the only high precision mass measurement setup coupled to a rare isotope facility capable of increasing the charge state of short-lived nuclides prior to the actual mass determination in a Penning trap. Recent developments around TITAN's charge breeder, the electron beam ion trap, form the basis for several successful experiments on radioactive isotopes with half-lives as low as 65 ms and in charge states as high as 22+.

Simon, M. C.; Eberhardt, B.; Jang, F.; Luichtl, M.; Robertson, D.; Chaudhuri, A.; Delheij, P.; Grossheim, A.; Kwiatkowski, A. A.; Mane, E.; Pearson, M. R.; Schultz, B. E. [TRIUMF, Vancouver, British Columbia V6T 2A3 (Canada); Bale, J. C. [TRIUMF, Vancouver, British Columbia V6T 2A3 (Canada); Department of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6 (Canada); Chowdhury, U. [TRIUMF, Vancouver, British Columbia V6T 2A3 (Canada); Department of Physics and Astronomy, University of Manitoba, Winnipeg, Manitoba R3T 2N2 (Canada); Ettenauer, S.; Gallant, A. T.; Dilling, J. [TRIUMF, Vancouver, British Columbia V6T 2A3 (Canada); Department of Physics and Astronomy, University of British Columbia, Vancouver, British Columbia V6T 1Z1 (Canada); Lennarz, A. [TRIUMF, Vancouver, British Columbia V6T 2A3 (Canada); Institut fuer Kernphysik, Westfaelische Wilhelms-Universitaet, D-48149 Muenster (Germany); Ma, T.; Andreoiu, C. [Department of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6 (Canada); and others

2012-02-15T23:59:59.000Z

228

Precision Absolute Beam Current Measurement of Low Power Electron Beam  

SciTech Connect

Precise measurements of low power CW electron beam current for the Jefferson Lab Nuclear Physics program have been performed using a Tungsten calorimeter. This paper describes the rationale for the choice of the calorimeter technique, as well as the design and calibration of the device. The calorimeter is in use presently to provide a 1% absolute current measurement of CW electron beam with 50 to 500 nA of average beam current and 1-3 GeV beam energy. Results from these recent measurements will also be presented.

Ali, M. M.; Bevins, M. E.; Degtiarenko, P.; Freyberger, A.; Krafft, G. A.

2012-11-01T23:59:59.000Z

229

Fluorescence Axial Localization with Nanometer Accuracy and Precision  

SciTech Connect

We describe a new technique, standing wave axial nanometry (SWAN), to image the axial location of a single nanoscale fluorescent object with sub-nanometer accuracy and 3.7 nm precision. A standing wave, generated by positioning an atomic force microscope tip over a focused laser beam, is used to excite fluorescence; axial position is determined from the phase of the emission intensity. We use SWAN to measure the orientation of single DNA molecules of different lengths, grafted on surfaces with different functionalities.

Li, Hui; Yen, Chi-Fu; Sivasankar, Sanjeevi

2012-06-15T23:59:59.000Z

230

Improved InGaN epitaxy yield by precise temperature measurement :yearly report 1.  

SciTech Connect

This Report summarizes the first year progress (October 1, 2004 to September 30, 2005) made under a NETL funded project entitled ''Improved InGaN Epitaxy Yield by Precise Temperature Measurement''. This Project addresses the production of efficient green LEDs, which are currently the least efficient of the primary colors. The Project Goals are to advance IR and UV-violet pyrometry to include real time corrections for surface emissivity on multiwafer MOCVD reactors. Increasing wafer yield would dramatically reduce high brightness LED costs and accelerate the commercial manufacture of inexpensive white light LEDs with very high color quality. This work draws upon and extends our previous research (funded by DOE) that developed emissivity correcting pyrometers (ECP) based on the high-temperature GaN opacity near 400 nm (the ultraviolet-violet range, or UVV), and the sapphire opacity in the mid-IR (MIR) near 7.5 microns.

Koleske, Daniel David; Creighton, James Randall; Russell, Michael J.; Fischer, Arthur Joseph

2006-08-01T23:59:59.000Z

231

Precision Top-Quark Mass Measurements at CDF  

Science Conference Proceedings (OSTI)

We present a precision measurement of the top-quark mass using the full sample of Tevatron {radical}s = 1.96 TeV proton-antiproton collisions collected by the CDF II detector, corresponding to an integrated luminosity of 8.7 fb{sup -1}. Using a sample of t{bar t} candidate events decaying into the lepton+jets channel, we obtain distributions of the top-quark masses and the invariant mass of two jets from the W boson decays from data. We then compare these distributions to templates derived from signal and background samples to extract the top-quark mass and the energy scale of the calorimeter jets with in situ calibration. The likelihood fit of the templates from signal and background events to the data yields the single most-precise measurement of the top-quark mass, mtop = 172.85 {+-} 0.71 (stat) {+-} 0.85 (syst) GeV/c{sup 2}.

Aaltonen, T.; /Helsinki Inst. of Phys.; Alvarez Gonzalez, B.; /Oviedo U. /Cantabria Inst. of Phys.; Amerio, S.; /INFN, Padua; Amidei, D.; /Michigan U.; Anastassov, A.; /Northwestern U. /Fermilab; Annovi, A.; /Frascati; Antos, J.; /Comenius U.; Apollinari, G.; /Fermilab; Appel, J.A.; /Fermilab; Arisawa, T.; /Waseda U.; Artikov, A.; /Dubna, JINR /Texas A-M

2012-07-01T23:59:59.000Z

232

National Ignition Campaign (NIC) Precision Tuning Series Shock Timing Experiments  

Science Conference Proceedings (OSTI)

A series of precision shock timing experiments have been performed on NIF. These experiments continue to adjust the laser pulse shape and employ the adjusted cone fraction (CF) in the picket (1st 2 ns of the laser pulse) as determined from the re-emit experiment series. The NIF ignition laser pulse is precisely shaped and consists of a series of four impulses, which drive a corresponding series of shock waves of increasing strength to accelerate and compress the capsule ablator and fuel layer. To optimize the implosion, they tune not only the strength (or power) but also, to sub-nanosecond accuracy, the timing of the shock waves. In a well-tuned implosion, the shock waves work together to compress and heat the fuel. For the shock timing experiments, a re-entrant cone is inserted through both the hohlraum wall and the capsule ablator allowing a direct optical view of the propagating shocks in the capsule interior using the VISAR (Velocity Interferometer System for Any Reflector) diagnostic from outside the hohlraum. To emulate the DT ice of an ignition capsule, the inside of the cone and the capsule are filled with liquid deuterium.

Robey, H F; Celliers, P M

2011-07-19T23:59:59.000Z

233

Precision engineering center. 1988 Annual report, Volume VI  

SciTech Connect

To reverse the downward trend in the balance of trade, American companies must concentrate on increasing research into new products, boosting productivity, and improving manufacturing processes. The Precision Engineering Center at North Carolina State University is a multidisciplinary research and graduate education program dedicated to providing the new technology necessary to respond to this challenge. One extremely demanding manufacturing area is the fabrication and assembly of optical systems. These systems are at the heart of such consumer products as cameras, lenses, copy machines, laser bar-code scanners, VCRs, and compact audio discs - products that the Japanese and other East Asian countries are building dominance. A second critical area is the fabrication of VLSI and ULSI circuits. The tolerances required to produce the next generation of components for such systems have created the need for new approaches - approaches that could either make or break America`s competitive position. This report contains individual reports on research projects grouped into three broad areas: measurement and actuation; real-time control; precision fabrication. Separate abstracts for these articles have been indexed into the energy database.

Dow, T. [ed.; Fornaro, R.; Keltie, R.; Paesler, M. [and others

1988-12-01T23:59:59.000Z

234

Prospects for Precision Higgs Physics at Linear Colliders  

E-Print Network (OSTI)

A linear e+e- collider provides excellent possibilities for precision measurements of the properties of the Higgs boson. At energies close to the Z-Higgs threshold, the Higgs boson can be studied in recoil against a Z boson, to obtain not only a precision mass measurement but also direct measurements of the branching ratios for most decay modes, including possible decay to invisible species. At higher energies, the Higgs boson coupling to top quarks and the Higgs boson self-coupling can also be measured. At energies approaching 1 TeV and above, the rising cross section for Higgs production in WW fusion allows the measurement of very small branching ratios, including the branching ratio to muon pairs. These experiments make it possible to determine the complete profile of the Higgs boson in a model-independent way. The prospects for these measurements are summarized, based on the results of detailed simulation studies performed within the frameworks of the CLIC conceptual design report and the ILC technical design report.

Frank Simon

2012-11-30T23:59:59.000Z

235

Precision monitoring of relative beam intensity for Mu2e  

SciTech Connect

For future experiments at the intensity frontier, precise and accurate knowledge of beam time structure will be critical to understanding backgrounds. The proposed Mu2e experiment will utilize {approx}200 ns (FW) bunches of 3 x 10{sup 7} protons at 8 GeV with a bunch-to-bunch period of 1695 ns. The out-of-bunch beam must be suppressed by a factor of 10{sup -10} relative to in-bunch beam and continuously monitored. I propose a Cerenkov-based particle telescope to measure secondary production from beam interactions in a several tens of microns thick foil. Correlating timing information with beam passage will allow the determination of relative beam intensity to arbitrary precision given a sufficiently long integration time. The goal is to verify out-of-bunch extinction to the level 10{sup -6} in the span of several seconds. This will allow near real-time monitoring of the initial extinction of the beam resonantly extracted from Fermilabs Debuncher before a system of AC dipoles and collimators, which will provide the final extinction. The effect on beam emittance is minimal, allowing the necessary continuous measurement. I will present the detector design and some concerns about bunch growth during the resonant extraction.

Evans, N.J.; Kopp, S.E.; /Texas U.; Prebys, E.; /Fermilab

2011-04-01T23:59:59.000Z

236

PRECISE MEASUREMENT OF PARITY NONCONSERVATION IN ATOMIC THALLIUM  

E-Print Network (OSTI)

on High Energy Physics, Tbilisi, USSR. (Neu 77a) D. Neufferon High Energy Physics, Tbilisi, USSR. A. Flusberg, T.

Hunter, L.R.

2010-01-01T23:59:59.000Z

237

An interference wiggler for precise diagnostics of electron beam energy  

SciTech Connect

Relativistic electrons passing through two identical magnetic sections generate synchrotron radiation whose spectrum is strongly modulated as the photon energy varies. The modulation is caused by the interference of radiation from each section, and has been observed in the spectrum of spontaneous radiation from transverse optical klystron which utilizes two undulators. In this paper, another device based on two simple wigglers is analyzed. The device, which will be called the interference wiggler, can be used for precise diagnostics of electron beam energy; by analyzing the modulated spectrum with a monochromator, the electron energy can be determined up to an accuracy of 10/sup -3/ or 10/sup -4/. General design criteria for interference wigglers are developed. Several example designs are given for measurement of the electron energy for the planned electron beam facility at CEBAF for the 1 to 2 GeV Light Source at Berkeley.

Kim, Kwang-Je

1987-03-01T23:59:59.000Z

238

Precision spectroscopy by photon-recoil signal amplification  

E-Print Network (OSTI)

Precision spectroscopy of atomic and molecular ions offers a window to new physics, but is typically limited to species with a cycling transition for laser cooling and detection. Quantum logic spectroscopy has overcome this limitation for species with long-lived excited states. Here, we extend quantum logic spectroscopy to fast, dipole-allowed transitions and apply it to perform an absolute frequency measurement. We detect the absorption of photons by the spectroscopically investigated ion through the photon recoil imparted on a co-trapped ion of a different species, on which we can perform efficient quantum logic detection techniques. This amplifies the recoil signal from a few absorbed photons to thousands of fluorescence photons. We resolve the line center of a dipole-allowed transition in 40Ca+ to 1/300 of its observed linewidth, rendering this measurement one of the most accurate of a broad transition. The simplicity and versatility of this approach enables spectroscopy of many previously inaccessible species.

Yong Wan; Florian Gebert; Jannes B. Wübbena; Nils Scharnhorst; Sana Amairi; Ian D. Leroux; Börge Hemmerling; Niels Lörch; Klemens Hammerer; Piet O. Schmidt

2013-09-26T23:59:59.000Z

239

Collaboration between varied organizations develops larger, more precise  

NLE Websites -- All DOE Office Websites (Extended Search)

The Large Area Picosecond Photodetector (LAPPD) collaboration has developed cheaper, larger, more robust microchannel plates, seen here at a test facility at Argonne. The LAPPD team has partnered with Massachusetts-based fiber optics company INCOM Inc. to manufacture the plates. Click to enlarge. The Large Area Picosecond Photodetector (LAPPD) collaboration has developed cheaper, larger, more robust microchannel plates, seen here at a test facility at Argonne. The LAPPD team has partnered with Massachusetts-based fiber optics company INCOM Inc. to manufacture the plates. Click to enlarge. The Large Area Picosecond Photodetector (LAPPD) collaboration has developed cheaper, larger, more robust microchannel plates, seen here at a test facility at Argonne. The LAPPD team has partnered with Massachusetts-based fiber optics company INCOM Inc. to manufacture the plates. Click to enlarge. Collaboration between varied organizations develops larger, more precise photodetectors for the market By Chelsea Leu * November 5, 2013 Tweet EmailPrint Scientific particle detectors, medical imaging devices and cargo scanners

240

Characterization and Qualification of a Precision Diamond Saw  

SciTech Connect

A precision diamond saw was characterized and qualified for production using the MCCS Encryption Translator (MET) network. This characterization was performed in three steps. First the equipment was evaluated and characterized, and then a process was developed and characterized to saw cofire networks. Finally, the characterized process was qualified for production using the MET network. During the development of the low-temperature cofired ceramic (LTCC) processes needed to build the MCCS Encryption Translator (MET) network, a problem was uncovered. The laser process planned for scribing and separating was found to weaken the LTCC material by about 30%. A replacement process was needed, and precision diamond sawing was chosen. During the equipment evaluation and characterization, several parameters were investigated. These were cut depth, feed rate, spindle speed, and saw blade thickness. Once these were understood the process was then developed. Initially 24 variables were identified for the process, and eventually 12 of these variables were found to be critical. These variables were then adjusted until a process envelope was found that produced acceptable product. Finally parameters were chosen from the middle of the process envelope for production. With the production process set, the next step was to qualify it for production. Two criteria had to be met: visual acceptability and bending strength. The parts were examined under a microscope and found to be visually acceptable. Parts were then put through a four-point bend test, and the strengths recorded were equivalent to those measured in the past. With the completion of this work and the acceptable results, this process was qualified for production use.

Morgenstern, H.A.

1999-03-04T23:59:59.000Z

Note: This page contains sample records for the topic "high precision tester" 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

An asymmetric adaptive-precision energy-efficient 3DIC multiplier  

Science Conference Proceedings (OSTI)

Decades of research in optimizing multipliers for power, speed, and area efficiency, and the continuing push for further enhancing multipliers reflects their importance. Energy-efficient computing requires optimization of every single logic component ... Keywords: 3 dimensional integrated circuits, 3dic, asymmetric variable precision, chip stacking, energy efficient, multiplier, precision, variable precision

Gopi Neela; Jeffrey Draper

2013-05-01T23:59:59.000Z

242

Precision Measurements of Atomic Lifetimes and Hyperfine Energies in Alkali Like Systems  

Science Conference Proceedings (OSTI)

Financial support of this research project has lead to advances in the study of atomic structure through precision measurements of atomic lifetimes, energy splittings, and transitions energies. The interpretation of data from many areas of physics and chemistry requires an accurate understanding of atomic structure. For example, scientists in the fields of astrophysics, geophysics, and plasma fusion depend on transition strengths to determine the relative abundances of elements. Assessing the operation of discharges and atomic resonance line filters also depends on accurate knowledge of transition strengths. Often relative transition strengths are measured precisely, but accurate atomic lifetimes are needed to obtain absolute values. Precision measurements of atomic lifetimes and energy splittings also provide fundamentally important atomic structure information. Lifetimes of allowed transitions depend most strongly on the electronic wave function far from the nucleus. Alternatively, hyperfine splittings give important information about the electronic wave function in the vicinity of the nucleus as well as the structure of the nucleus. Our main focus throughout this project has been the structure of atomic cesium because of its connection to the study of atomic parity nonconservation (PNC). The interpretation of atomic PNC experiments in terms of weak interaction coupling constants requires accurate knowledge of the electronic wave function near the nucleus as well as far from the nucleus. It is possible to address some of these needs theoretically with sophisticated many-electron atomic structure calculations. However, this program has been able to address these needs experimentally with a precision that surpasses current theoretical accuracy. Our measurements also play the important role of providing a means for testing the accuracy of many-electron calculations and guiding further theoretical development, Atomic systems such as cesium, with a single electron outside of a closed shell, provide the simplest open shell systems for detailed comparisons between experiment and theory. This program initially focused on measurements of excited state atomic lifetimes in alkali atomic systems. Our first measurements of atomic lifetimes in cesium surpassed the precision and accuracy of previous measurements and sparked renewed interest in the need for greater precision in lifetime measurements throughout the atomic physics community. After enhancing the capabilities of the laser systems built for these initial measurements, we began a study hyperfine energy splittings in cesium using a thermal atomic beam. The results surpassed previous measurements by more than an order of magnitude and lead to the first observation of the nuclear magnetic octupole moment in cesium demonstrating the inadequacy of the nuclear shell model for predicting high order nuclear moments. The laser system and atomic beam apparatus developed for these endeavors turned out to be perfectly suited for exploring the possibility of making absolute optical frequency measurements of atomic transitions. We initiated collaboration with researchers at NIST so that the desired optical frequencies could be reference with respect to the primary microwave frequency standard (Cs atomic fountain NIST-FI) via a femtosecond laser frequency comb. Our first absolute optical frequency measurement, of the cesium D2 line, surpassed the accuracy of a previous measurement by more than an order of magnitude. An absolute optical frequency measurement of the cesium D1 line, now near completion, also surpasses previous results and places us in a position to be able to report a new value for the fine structure constant which is the fundamental dimensionless constant that underlies all electromagnetic interactions.

Tanner, Carol E.

2005-03-04T23:59:59.000Z

243

Application of constrained-layer damping to a precision kinematic coupling  

SciTech Connect

This paper addresses the need to support a very precise optical instrument while causing essentially no influence to its natural shape. Such influences could come from a number of sources, such as manufacturing tolerances, temperature changes, over-constrained structural members, or ground motion. Kinematic couplings have long been used for purposes of repeatable location and minimal influence to the supported object, however these couplings typically offer very little damping. This paper presents a kinematic coupling that utilizes constrained-layer damping techniques to damp out the first three modes of vibration of a precision optical instrument. Finite element analysis was used to aid in the design and tuning of the dampers for the kinematic coupling. Experimental tests were conducted and confirmed the effectiveness of the dampers. The quality factor (Q), which measure the amplification at resonance, dropped from 33.3 to 5.9 on the first mode, from 156.3 to 7.1 on the second mode, and from 147.1 to 18.5 on the third mode. These dampers help to ensure that the stringent vibration requirements necessary to produce high quality optical images are met.

Jensen, S A; Hale, L C

2000-10-10T23:59:59.000Z

244

Precision benchmark calculations for four particles at unitarity  

E-Print Network (OSTI)

The unitarity limit describes interacting particles where the range of the interaction is zero and the scattering length is infinite. We present precision benchmark calculations for two-component fermions at unitarity using three different ab initio methods: Hamiltonian lattice formalism using iterated eigenvector methods, Euclidean lattice formalism with auxiliary-field projection Monte Carlo, and continuum diffusion Monte Carlo with fixed and released nodes. We have calculated the ground state energy of the unpolarized four-particle system in a periodic cube as a dimensionless fraction of the ground state energy for the non-interacting system. We obtain values 0.211(2) and 0.210(2) using two different Hamiltonian lattice representations, 0.206(9) using Euclidean lattice, and an upper bound of 0.212(2) from fixed-node diffusion Monte Carlo. Released-node calculations starting from the fixed-node result yield a decrease of less than 0.002 over a propagation of 0.4/E_F in Euclidean time, where E_F is the Fermi energy. We find good agreement among all three ab initio methods.

Shahin Bour; Xin Li; Dean Lee; Ulf-G. Meißner; Lubos Mitas

2011-04-12T23:59:59.000Z

245

Precision calculation of blackbody radiation shifts for optical frequency metrology  

E-Print Network (OSTI)

We show that three group IIIB divalent ions, B+, Al+, and In+, have anomalously small blackbody radiation (BBR) shifts of the ns^2 1S0 - nsnp 3P0 clock transitions. The fractional BBR shifts for these ions are at least 10 times smaller than those of any other present or proposed optical frequency standards at the same temperature, and are less than 0.3% of the Sr clock shift. We have developed a hybrid configuration interaction + coupled-cluster method that provides accurate treatment of correlation corrections in such ions, considers all relevant states in the same systematic way, and yields a rigorous upper bound on the uncertainty of the final results. We reduce the BBR contribution to the fractional frequency uncertainty of the Al+ clock to 4 \\times 10^{-19} at T=300K. We also reduce the uncertainties due to this effect at room temperature to 10^{-18} level for B+ and In+ to facilitate further development of these systems for metrology and quantum sensing. These uncertainties approach recent estimates of the feasible precision of currently proposed optical atomic clocks.

M. S. Safronova; M. G. Kozlov; Charles W. Clark

2011-05-16T23:59:59.000Z

246

Precise trace rare earth analysis by radiochemical neutron activation  

Science Conference Proceedings (OSTI)

A rare earth group separation scheme followed by normal Ge(Li), low energy photon detector (LEPD), and Ge(Li)-NaI(Tl) coincidence-noncoincidence spectrometry significantly enhances the detection sensitivity of individual rare earth elements (REE) at or below the ppB level. Based on the selected ..gamma..-ray energies, normal Ge(Li) counting is favored for /sup 140/La, /sup 170/Tb, and /sup 169/Yb; LEPD is favored for low ..gamma..-ray energies of /sup 147/Nd, /sup 153/Sm, /sup 166/Ho, and /sup 169/Yb; and noncoincidence counting is favored for /sup 141/Ce, /sup 143/Ce, /sup 142/Pr, /sup 153/Sm, /sup 171/Er, and /sup 175/Yb. The detection of radionuclides /sup 152m/Eu, /sup 159/Gd, and /sup 177/Lu is equally sensitive by normal Ge(Li) and noncoincidence counting; /sup 152/Eu is equally sensitive by LEPD and normal Ge(Li); and /sup 153/Gd and /sup 170/Tm is equally favored by all the counting modes. Overall, noncoincidence counting is favored for most of the REE. Precise measurements of the REE were made in geological and biological standards.

Laul, J.C.; Lepel, E.A.; Weimer, W.C.; Wogman, N.A.

1981-06-01T23:59:59.000Z

247

Atomic interactions in precision interferometry using Bose-Einstein condensates  

Science Conference Proceedings (OSTI)

We present theoretical tools for predicting and reducing the effects of atomic interactions in Bose-Einstein condensate (BEC) interferometry experiments. To address mean-field shifts during free propagation, we derive a robust scaling solution that reduces the three-dimensional Gross-Pitaevskii equation to a set of three simple differential equations valid for any interaction strength. To model the other common components of a BEC interferometer--condensate splitting, manipulation, and recombination--we generalize the slowly varying envelope reduction, providing both analytic handles and dramatically improved simulations. Applying these tools to a BEC interferometer to measure the fine structure constant, {alpha}[S. Gupta, K. Dieckmann, Z. Hadzibabic, and D. E. Pritchard, Phys. Rev. Lett. 89, 140401 (2002)], we find agreement with the results of the original experiment and demonstrate that atomic interactions do not preclude measurement to better than part-per-billion accuracy, even for atomic species with relatively large scattering lengths. These tools help make BEC interferometry a viable choice for a broad class of precision measurements.

Jamison, Alan O.; Gupta, Subhadeep [Department of Physics, University of Washington, Seattle, Washington 98195 (United States); Kutz, J. Nathan [Department of Physics, University of Washington, Seattle, Washington 98195 (United States); Department of Applied Math, University of Washington, Seattle, Washington 98195 (United States)

2011-10-15T23:59:59.000Z

248

Precision Magnet Measurements for X-Band Accelerator Quadrupole Triplets  

SciTech Connect

An X-band test station is being developed at LLNL to investigate accelerator optimization for future upgrades to mono-energetic gamma-ray (MEGa-Ray) technology at LLNL. Beamline magnets will include an emittance compensation solenoid, windowpane steering dipoles, and quadrupole magnets. Demanding tolerances have been placed on the alignment of these magnets, which directly affects the electron bunch beam quality. A magnet mapping system has been established at LLNL in order to ensure the delivered magnets match their field specification, and the mountings are aligned and capable of reaching the specified alignment tolerances. The magnet measurement system will be described which uses a 3-axis Lakeshore gauss probe mounted on a 3-axis translation stage. Alignment accuracy and precision will be discussed, as well as centering measurements and analysis. The dependence on data analysis over direct multi-pole measurement allows a significant improvement in useful alignment information. Detailed analysis of measurements on the beamline quadrupoles will be discussed, including multi-pole content both from alignment of the magnets, and the intrinsic level of multi-pole magnetic field.

Marsh, R A; Anderson, S G; Armstrong, J P

2012-05-16T23:59:59.000Z

249

Precise Measurement of the K - to Pi -E E- Decay  

SciTech Connect

A sample of 7253 K{sup {+-}} {yields} {pi}{sup {+-}}e{sup +}e{sup -}({gamma}) decay candidates with 1.0% background contamination has been collected by the NA 48/2 experiment at the CERN SPS, which allowed a precise measurement of the decay properties. The branching ratio in the full kinematic range was measured to be BR = (3.11 {+-} 0.12) x 10{sup -7}, where the uncertainty includes also the model dependence. The shape of the form factor W(z), where z = (M{sub ee}/M{sub K}){sup 2}, was parameterized according to several models, and, in particular, the slope {delta} of the linear form factor W(z) = W{sub 0}(1 + {delta}z) was determined to be {delta} = 2.32 {+-} 0.18. A possible CP violating asymmetry of K{sup +} and K{sup -} decay widths was investigated, and a conservative upper limit of 2.1 x 10{sup -2} at 90% CL was established.

Batley, J.R.; Culling, A.J.; Kalmus, G.; /Cambridge U.; Lazzeroni, C.; /Cambridge U. /Birmingham U.; Munday, D.J.; /Cambridge U.; Slater, M.W.; /Cambridge U. /Birmingham U.; Wotton, S.A.; /Cambridge U.; Arcidiacono, R.; /CERN /Turin U. /INFN, Turin; Bocquet, G.; /CERN; Cabibbo, N.; /CERN /Rome U. /INFN, Rome; Ceccucci, A.; /CERN; Cundy, D.; /CERN /Turin, Cosmo-Geofisica Lab; Falaleev, V.; Fidecaro, M.; Gatignon, L.; Gonidec, A.; Kubischta, W.; /CERN; Norton, A.; /CERN /Ferrara U. /INFN, Ferrara; Maier, A.; Patel, M.; Peters, A.; /CERN /Dubna, JINR /Pisa, Scuola Normale Superiore /Dubna, JINR /Dubna, JINR /Birmingham U. /Dubna, JINR /CERN /Dubna, JINR /Dubna, JINR /Sofiya U. /Dubna, JINR /Dubna, JINR /INFN, Perugia /Dubna, JINR /Dubna, JINR /Northwestern U. /Dubna, JINR /Chicago U., EFI /Marseille, CPPM /Chicago U., EFI /Edinburgh U. /George Mason U. /Edinburgh U. /Ferrara U. /INFN, Ferrara /Ferrara U. /INFN, Ferrara /CERN /Ferrara U. /INFN, Ferrara /Florence U. /INFN, Florence /Modena U. /Florence U. /INFN, Florence /Florence U. /INFN, Florence /Urbino U. /Florence U. /INFN, Florence /Pisa, Scuola Normale Superiore /Florence U. /INFN, Florence /Urbino U. /Mainz U., Inst. Phys. /Mainz U., Inst. Phys. /Bonn U. /Mainz U., Inst. Phys. /Northwestern U. /SLAC /Northwestern U. /Northwestern U. /Royal Holloway, U. of London /Northwestern U. /Northwestern U. /UCLA /Perugia U. /INFN, Perugia /Perugia U. /INFN, Perugia /Frascati /Perugia U. /INFN, Perugia /INFN, Pisa /Pisa, Scuola Normale Superiore /INFN, Pisa /Pisa U. /INFN, Pisa /Pisa U. /INFN, Pisa /Barcelona, IFAE /Pisa U. /INFN, Pisa /DAPNIA, Saclay /DAPNIA, Saclay /CERN /DAPNIA, Saclay /Siegen U. /Turin U. /INFN, Turin /Bern U. /Turin U. /INFN, Turin /Turin U. /INFN, Turin /CERN /Turin U. /INFN, Turin /Madrid, CIEMAT /Turin U. /INFN, Turin /Vienna, OAW

2011-11-22T23:59:59.000Z

250

Creating a Precise Atomic-Scale Map of Quantum Dots | Advanced Photon  

NLE Websites -- All DOE Office Websites (Extended Search)

Getting to the Roots of Lethal Hairs Getting to the Roots of Lethal Hairs Stressing Out the Twins in Magnesium Size-Related Behavior of Anatase Nanocrystals under Extreme Pressure Boron-Based Compounds Trick a Biomedical Protein A Targeted Cancer Treatment using Nanomaterials Science Highlights Archives: 2013 | 2012 | 2011 | 2010 2009 | 2008 | 2007 | 2006 2005 | 2004 | 2003 | 2002 2001 | 2000 | 1998 | Subscribe to APS Science Highlights rss feed Creating a Precise Atomic-Scale Map of Quantum Dots OCTOBER 9, 2009 Bookmark and Share An atomic-scale map of the interface between an atomic dot and its substrate. Each peak represents a single atom. The map, made with high-intensity x-rays at the APS, is a slice through a vertical cross-section of the dot. (Image courtesy of Roy Clarke, University of

251

New Precision Measurements of Deuteron Structure Function A(Q) at Low Momentum Transfer  

DOE Green Energy (OSTI)

Differences between previous measurements of low momentum transfer electron-deuteron elastic scattering prevent a clean determination of even the sign of the leading low momentum transfer relativistic corrections, or of the convergence of chiral perturbation theory. We have attempted to resolve this issue with a new high-precision measurement in Jefferson Lab Hall A. Elastic electron scattering was measured on targets of tantalum, carbon, hydrogen, and deuterium at beam energy of 685 MeV. The four-momentum transfer covered the range of 0.15 - 0.7 GeV. The experiment included a new beam calorimeter, to better calibrate the low beam currents used in the experiment, and new collimators to better define the spectrometer solid angles. We obtained cross sections of deuteron as ratios to hydrogen cross sections. A fit function of B(Q) world data is newly made and subtracted from cross sections to find values of A(Q).

Byungwuek Lee

2009-08-01T23:59:59.000Z

252

A simple device for high-precision head image registration: Preliminary performance and accuracy tests  

SciTech Connect

The purpose of this paper is to present a new device for multimodal head study registration and to examine its performance in preliminary tests. The device consists of a system of eight markers fixed to mobile carbon pipes and bars which can be easily mounted on the patient's head using the ear canals and the nasal bridge. Four graduated scales fixed to the rigid support allow examiners to find the same device position on the patient's head during different acquisitions. The markers can be filled with appropriate substances for visualisation in computed tomography (CT), magnetic resonance, single photon emission computer tomography (SPECT) and positron emission tomography images. The device's rigidity and its position reproducibility were measured in 15 repeated CT acquisitions of the Alderson Rando anthropomorphic phantom and in two SPECT studies of a patient. The proposed system displays good rigidity and reproducibility characteristics. A relocation accuracy of less than 1,5 mm was found in more than 90% of the results. The registration parameters obtained using such a device were compared to those obtained using fiducial markers fixed on phantom and patient heads, resulting in differences of less than 1 deg. and 1 mm for rotation and translation parameters, respectively. Residual differences between fiducial marker coordinates in reference and in registered studies were less than 1 mm in more than 90% of the results, proving that the device performed as accurately as noninvasive stereotactic devices. Finally, an example of multimodal employment of the proposed device is reported.

Pallotta, Stefania [Dipartimento di Fisiopatologia Clinica, Universita degli Studi di Firenze (Italy)

2007-05-15T23:59:59.000Z

253

EXPLORATION OF THE KUIPER BELT BY HIGH-PRECISION PHOTOMETRIC STELLAR OCCULTATIONS: FIRST RESULTS  

E-Print Network (OSTI)

We report here the first detection of hectometer-size objects by the method of serendipitous stellar occultation. This method consists of recording the diffraction shadow created when an object crosses the observer’s line of sight and occults the disk of a background star. One of our detections is most consistent with an object between Saturn and Uranus. The two other diffraction patterns detected are caused by Kuiper Belt objects beyond 100 AU from the Sun and hence are the farthest known objects in the solar system. These detections show that the Kuiper Belt is much more extended than previously believed and that the outer part of the disk could be composed of smaller objects than the inner part. This gives critical clues to understanding the problem of the formation of the outer planets of the solar system. Key words: Kuiper Belt — occultations — solar system: formation 1.

unknown authors

2005-01-01T23:59:59.000Z

254

A High Precision Double Tubed Hydrostatic Leveling System for Accelerator Alignment Applications  

Science Conference Proceedings (OSTI)

Since 1998 several hydrostatic leveling systems (HLS) have been installed in different locations at Fermilab. This work was in collaboration with Budker Institute and SLAC. All systems were either half-filled pipe (HF) or full-filled pipe (FF). Issues assembling HLS are covered in this article. An improved and cost-effective water system with temperature stabilized of water media is presented. This proposal is a double-tube full-filled DT-FF system. Examples of hardware configurations are included for systems located at Fermilab.

Singatulin, Shavkat; Volk, J.; Shiltsev, V.; /Fermilab; Chupyra, A.; Medvedko, A.; Kondaurov, M.; /Novosibirsk, IYF

2006-09-01T23:59:59.000Z

255

Status update on the NIFFTE high precision fission cross section measurement program  

DOE Green Energy (OSTI)

The Neutron Induced Fission Fragment Tracking Experiment (NIFFTE) program has been underway for nearly two years. The program's mission is to measure fission cross sections of the primary fissionable and fissile materials ({sup 235}U, {sup 239}Pu, {sup 238}U) as well as the minor actinides across energies from approximately 50 keV up to 20 MeV with an absolute uncertainty of less than one percent while investigating energy ranges from below an eV to 600 MeV. This basic nuclear physics data is being reinvestigated to support the next generation power plants and a fast burner reactor program. Uncertainties in the fast, resolved and unresolved resonance regions in plutonium and other transuranics are extremely large, dominating safety margins in the next generation nuclear power plants and power plants of today. This basic nuclear data can be used to support all aspects of the nuciear renaissance. The measurement campaign is utilizing a Time Projection Chamber or TPC as the tool to measure these cross sections to these unprecedented levels. Unlike traditional fission cross section measurements using time-of-flight and a multiple fission foil configurations in which fission cross sections in relation to that of {sup 235}U are performed, the TPC project uses time-of-flight and hydrogen as the benchmark cross section. Using the switch to hydrogen, a simple, smooth cross section that can be used which removes the uncertainties associated with the resolved and unresolved resonances in {sup 235}U.

Laptev, Alexander B [Los Alamos National Laboratory; Tovesson, Fredrik [Los Alamos National Laboratory; Burgett, Eric [GEORGIA INSTITUTE OF TECH; Greife, Uwe [COLORADO SCHOOL OF THE MINES; Grimes, Steven [OHIO UNIV; Heffner, Michael D [LLNL; Hertel, Nolan E [GEORGIA INSTITUTE OF TECH; Hill, Tony [IDAHO NATIONAL LABORATORY; Isenhower, Donald [ABILENE CHRISTIN UNIV; Klay, Jennifer L [CALIFORNIA POLYTECHNIC STATE UNIV; Kornilov, Nickolay [OHIO UNIV; Kudo, Ryuho [CALIFORNIA POLYTECHNIC STATE UNIV; Loveland, Walter [OREGON STATE UNIV; Massey, Thomas [OHIO UNIV; Mc Grath, Chris [IDAHO NATIONAL LABORATORY; Pickle, Nathan [ABILENE CHRISTIAN UNIV; Qu, Hai [ABILENE CHRISTIAN UNIV; Sharma, Sarvagya [ABILENE CHRISTIAN UNIV; Snyder, Lucas [COLORADO SCHOOL OF THE MINES; Thornton, Tyler [ABILENE CHRISTIAN UNIV; Towell, Rusty S [ABILENE CHRISTIAN UNIV; Watson, Shon [ABILENE CHRISTIAN UNIV

2010-01-01T23:59:59.000Z

256

Iterative Methods for High Precision Motion Control with Application to a Wafer Scanner System  

E-Print Network (OSTI)

in linear permanent magnet motors. In American Controlby a linear permanent magnet motor (LPMM). Each of thethe mover of the linear motor (the magnet coils) is mounted

Stearns, Hoday Margaret

2011-01-01T23:59:59.000Z

257

Integrating high-precision U-Pb geochronologic data with dynamic models of earth processes  

E-Print Network (OSTI)

Radioisotopic dating can provide critical constraints for understanding the rates of tectonic, dynamic and biologic processes operating on our planet. Improving the interpretation and implementation of geochronologic data ...

Blackburn, Terrence (Terrence Joseph)

2012-01-01T23:59:59.000Z

258

Ultra-high precision scanning beam interference lithography and its application : spatial frequency multiplication  

E-Print Network (OSTI)

Scanning beam interference lithography (SBIL) is a technique developed at MIT in 2003. The SBIL system, referred to as the Nanoruler, could fabricate grating patterns with around ten-nanometer phase repeatability. There ...

Zhao, Yong, 1980-

2008-01-01T23:59:59.000Z

259

Hydrostatic Level Sensors as High Precision Ground Motion Instrumentation for Tevatron and Other Energy Frontier Accelerators  

Science Conference Proceedings (OSTI)

Particle accelerators require very tight tolerances on the alignment and stability of their elements: magnets, accelerating cavities, vacuum chambers, etc. In this article we describe the Hydrostatic Level Sensors (HLS) for very low frequency measurements used in a variety of facilities at Fermilab. We present design features of the sensors, outline their technical parameters, describe their test and calibration procedures, discuss different regimes of operation and give few illustrative examples of the experimental data. Detail experimental results of the ground motion measurements with these detectors will be presented in subsequent papers.

Volk, James; Hansen, Sten; Johnson, Todd; Jostlein, Hans; Kiper, Terry; Shiltsev, Vladimir; Chupyra, Andrei; Kondaurov, Mikhail; Medvedko, Anatoly; Parkhomchuk, Vasily; Singatulin, Shavkat

2012-01-01T23:59:59.000Z

260

High-precision evaluation of the magnetic moment of the helion  

SciTech Connect

NMR spectra of samples containing a mixture of hydrogen deuteride HD with pressure of about 80 atm and helium-3 with partial pressure of about 1 atm are analyzed. The ratio of the resonance frequencies of the nuclei, F({sup 3}He)/F(H{sub 2}), is determined to be 0.761786594(2), which is equal to the magnetic moment of the helion (bound in a helium atom) in the units of the magnetic moment of a proton (bound in molecular hydrogen). The uncertainty of two digits in the last place corresponds to a relative error of {delta}[F({sup 3}He)/F(H{sub 2})] = 2.6 Multiplication-Sign 10{sup -9}. The use of the known calculated data on the shielding of nuclei in the helium-3 atom ({sigma}({sup 3}He) = 59924(2) Multiplication-Sign 10{sup -9}) and on the shielding of protons in hydrogen ({sigma}(H{sub 2}) = 26288(2) Multiplication-Sign 10{sup -9}) yields a value of {mu}({sup 3}He)/{mu}{sub p} = -0.761812217(3) for the free magnetic moment of the helion in the units of the proton magnetic moment.

Neronov, Yu. I., E-mail: yineronov@mail.ru; Seregin, N. N. [Mendeleev All-Russia Research Institute of Metrology (Russian Federation)

2012-11-15T23:59:59.000Z

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261

High Precision Measurement of the Proton Elastic Form Factor Ratio at Low Q2  

DOE Green Energy (OSTI)

Experiment E08-007 measured the proton elastic form factor ratio ?pGE/GM in the range of Q2 = 0.3?0.7(GeV/c)2 by recoil polarimetry. Data were taken in 2008 at the Thomas Jefferson National Accelerator Facility in Virginia, USA. A 1.2 GeV polarized electron beam was scattered off a cryogenic hydrogen target. The recoil proton was detected in the left HRS in coincidence with the elasticly scattered electrons tagged by the BigBite spectrometer. The proton polarization was measured by the focal plane polarimeter (FPP). In this low Q2 region, previous measurement from Jefferson Lab Hall A (LEDEX) along with various fits and calculations indicate substantial deviations of the ratio from unity. For this new measurement, the proposed statistical uncertainty (< 1%) was achieved. These new results are a few percent lower than expected from previous world data and fits, which indicate a smaller GEp at this region. Beyond the intrinsic interest in nucleon structure, the new results also have implications in determining the proton Zemach radius and the strangeness form factors from parity violation experiments.

Xiaohui Zhan

2010-01-31T23:59:59.000Z

262

High Precision Control of Indirect Drive Systems Based on End-effector Sensor Information  

E-Print Network (OSTI)

Block diagram of the closed-loop control system . . . . .the control system . . . . . . . . . . . . . . . . . . Blockof the proposed speed control system . . . . . . . . .

Han, Cheng-Huei

2009-01-01T23:59:59.000Z

263

Progress towards high precision measurements on ultracold metastable hydrogen and trapping deuterium  

E-Print Network (OSTI)

(cont.) not achieve deuterium trapping through helium-surface cooling. It is proposed that buffer gas loading can be used to cryogenically cool and trap deuterium.

Steinberger, Julia K., 1974-

2004-01-01T23:59:59.000Z

264

Iterative Methods for High Precision Motion Control with Application to a Wafer Scanner System  

E-Print Network (OSTI)

Laser Measurement System2.1.2 Laser Measurement System . . . . . 2.1.3 Linearare identical. Laser Measurement System The wafer stage

Stearns, Hoday Margaret

2011-01-01T23:59:59.000Z

265

High precision measurement of the proton elastic form factor ratio at low Q²  

E-Print Network (OSTI)

Experiment E08-007 measured the proton elastic form factor ratio [mu]GE/GM in the range of Q2 = 0.3-0.7(GeV/c)2 by recoil polarimetry. Data were taken in 2008 at the Thomas Jefferson National Accelerator Facility in Virginia, ...

Zhan, Xiaohui

2010-01-01T23:59:59.000Z

266

Ultra-sensitive high-precision spectroscopy of a fast molecular ion beam  

Science Conference Proceedings (OSTI)

Direct spectroscopy of a fast molecular ion beam offers many advantages over competing techniques, including the generality of the approach to any molecular ion, the complete elimination of spectral confusion due to neutral molecules, and the mass identification of individual spectral lines. The major challenge is the intrinsic weakness of absorption or dispersion signals resulting from the relatively low number density of ions in the beam. Direct spectroscopy of an ion beam was pioneered by Saykally and co-workers in the late 1980s, but has not been attempted since that time. Here, we present the design and construction of an ion beam spectrometer with several improvements over the Saykally design. The ion beam and its characterization have been improved by adopting recent advances in electrostatic optics, along with a time-of-flight mass spectrometer that can be used simultaneously with optical spectroscopy. As a proof of concept, a noise-immune cavity-enhanced optical heterodyne molecular spectroscopy (NICE-OHMS) setup with a noise equivalent absorption of {approx}2 x 10{sup -11} cm{sup -1} Hz{sup -1/2} has been used to observe several transitions of the Meinel 1-0 band of N{sub 2}{sup +} with linewidths of {approx}120 MHz. An optical frequency comb has been used for absolute frequency calibration of transition frequencies to within {approx}8 MHz. This work represents the first direct spectroscopy of an electronic transition in an ion beam, and also represents a major step toward the development of routine infrared spectroscopy of rotationally cooled molecular ions.

Mills, Andrew A.; Siller, Brian M.; Porambo, Michael W.; Perera, Manori; Kreckel, Holger [Department of Chemistry, University of Illinois, Urbana, Illinois 61801 (United States); McCall, Benjamin J. [Department of Chemistry, University of Illinois, Urbana, Illinois 61801 (United States); Departments of Physics and Astronomy, University of Illinois, Urbana, Illinois 61801 (United States)

2011-12-14T23:59:59.000Z

267

Diamond Wire Saw for Precision Machining of Laser Target Components  

SciTech Connect

The fabrication of precision laser targets requires a wide variety of specialized mesoscale manufacturing techniques. The diamond wire saw developed in this study provides the capability to precisely section meso-scale workpieces mounted on the assembly stations used by the Target Fabrication Group. This new capability greatly simplifies the fabrication of many types of targets and reduces the time and cost required to build the targets. A variety of materials are used to fabricate targets, including metals, plastics with custom designed chemical formulas, and aerogels of various densities. The materials are usually provided in the form of small pieces or cast rods that must be machined to the required shape. Many of these materials, such as metals and some plastics, can be trimmed using a parting tool on a diamond turning machine. However, other materials, such as aerogels and brittle materials, cannot be adequately cut with a parting tool. In addition, the geometry of the parts often requires that the workpieces be held in a special assembly station, which excludes the use of a parting tool. In the past, these materials were sectioned using a small, handheld coping saw that used a diamond-impregnated wire as a blade. This miniature coping saw was effective, but it required several hours to cut through certain materials. Furthermore, the saw was guided by hand and often caused significant damage to fragile aerogels. To solve these problems, the diamond wire saw shown in Figure 1 was developed. The diamond wire saw is designed to machine through materials that are mounted in the Target Fabrication Group's benchtop assembly stations. These assembly stations are the primary means of aligning and assembling target components, and there is often a need to machine materials while they are mounted in the assembly stations. Unfortunately, commercially available saws are designed for very different applications and are far too large to be used with the assembly stations. Therefore, a custom diamond wire saw was designed and constructed. The diamond wire saw cuts through workpieces using a continuous loop of diamond-impregnated wire of length 840 mm. The wire loop runs around several idler pulleys and is driven by a simple geared DC motor that rotates at 17 rpm. The linear speed of the wire is 107 inches/minute. The saw is oriented at an angle of 20{sup o} from horizontal, so the operator can view the wire through the cutout at the front end of the saw. When looking through a microscope or camera with a horizontal line of sight, the operator can clearly see the wire as it cuts through the workpiece, as shown in the right side of Figure 1. The saw is mounted on a two-axis stage that allows the operator to align the wire with the workpiece. To cut through the workpiece, the operator drives the wire through the workpiece by turning the feed micrometer. An image of the interior of the diamond wire saw appears in Figure 2. This picture was taken after removing the protective cover plate from the saw.

Bono, M J; Bennett, D W

2005-08-08T23:59:59.000Z

268

A Precision Measurement of Parity Violation in Moller Scattering  

DOE Green Energy (OSTI)

This thesis reports on E158, an experiment located in End Station A at the Stanford Linear Accelerator Center (SLAC). E158 has made the first observation of the parity violating right-left asymmetry (A{sub PV}) in fixed-target low-Q{sup 2} Moeller scattering. At tree level, A{sub PV} (expected to be around -150 ppb) is directly proportional to 1/4 - sin{sup 2} {theta}{sub W}. A precision measurement of A{sub PV} at low Q{sup 2} allows the running of sin{sup 2} {theta}{sub W} to be compared to the Standard Model prediction. Disagreements between the two might provide evidence for new physics at the TeV scale. This thesis presents the first physics data from E158, taken in the spring of 2002. The data were taken by scattering longitudinally polarized electrons at 45.0 and 48.3 GeV off a liquid hydrogen target at a Q{sup 2} of 0.027 GeV{sup 2}. A 60 meter long spectrometer/collimator system and a cooper-quartz calorimeter were used to detect the Moeller signal electrons. Both devices will be described in detail. The right-left parity violating asymmetry in Moeller scattering has been measured to be -152.3 {+-} 29.0(stat) {+-} 30.9(syst) ppb. The value of sin{sup 2} {theta}{sub W} derived from this measurement is 0.2370 {+-} 0.0025(stat) {+-} 0.0026(syst), in comparison with the Standard Model prediction of 0.2387 {+-} 0.0007.

Relyea, D

2004-05-13T23:59:59.000Z

269

Assessment of the precision and accuracy of thorium ( 232 Th...  

NLE Websites -- All DOE Office Websites (Extended Search)

Buildings Cool Roofs and Heat Islands Demand Response Energy Efficiency Program and Market Trends High Technology and Industrial Buildings Lighting Systems Residential Buildings...

270

Improving the Precision and Productivity of Green Coke VCM Analysis  

Science Conference Proceedings (OSTI)

Green cokes with high VCM (>12%) are more difficult to calcine and result in a higher porosity and lower bulk density in calcined coke. The paper will review ...

271

DEVELOPMENT OF A PRECISION TUNABLE GAMMA-RAY SOURCE DRIVEN BY A COMPACT X-BAND LINAC  

Science Conference Proceedings (OSTI)

A precision, tunable gamma-ray source driven by a compact, high-gradient X-band linac is currently under development at LLNL. High-brightness, relativistic electron bunches produced by the linac interact with a Joule-class, 10 ps laser pulse to generate tunable {gamma}-rays in the 0.5-2.5 MeV photon energy range via Compton scattering. The source will be used to excite nuclear resonance fluorescence lines in various isotopes; applications include homeland security, stockpile science and surveillance, nuclear fuel assay, and waste imaging and assay. The source design, key parameters, and current status are presented.

Hartemann, F V; Albert, F; Anderson, G G; Anderson, S G; Bayramian, A J; Betts, S M; Chu, T S; Cross, R R; Ebbers, C A; Fisher, S E; Gibson, D J; Ladran, A S; Messerly, M J; Semenov, V A; Shverdin, M Y; Siders, C W; McNabb, D P; Barty, C J; Vlieks, A E; Jongewaard, E N; Tantawi, S G

2009-04-30T23:59:59.000Z

272

A New Look at Calibration and Use of Eppley Precision Infrared Radiometers. Part II: Calibration and Use of the Woods Hole Oceanographic Institution Improved Meteorology Precision Infrared Radiometer*  

Science Conference Proceedings (OSTI)

For some years, investigators have made measurements of downwelling longwave irradiance with the Eppley Precision Infrared Radiometer (PIR), recording the values of thermopile voltage and body and dome thermistor resistances and combining them in ...

Richard E. Payne; Steven P. Anderson

1999-06-01T23:59:59.000Z

273

Precision measurements of the top quark mass and width with the D0 detector  

Science Conference Proceedings (OSTI)

Since the discovery of the top quark in 1995 at the Fermliab Tevatron Collider, top quark properties have been measured with ever higher precision. In this article, recent measurements of the top quark mass and its width using up to 3.6 fb{sup -1} of D0 data are summarized. Different techniques and final states have been examined and no deviations within these measurements have been observed. In addition to the direct measurements, a measurement of the top quark mass from its production cross section and a measurement of the top-antitop quark mass difference are discussed. With a mass of 173.3 {+-} 1.1 GeV, the top quark is the heaviest of all known fundamental particles. Due to the high mass, its Yukawa coupling is close to unity suggesting that it may play a special role in electroweak symmetry breaking. Precise measurements of both, the W boson and the top quark mass, constrain the mass of the yet unobserved Higgs boson and allow to restrict certain extensions of the Standard Model. At the Tevatron collider with a center-of-mass energy of 1.96 TeV, 85% of the top quark pairs are produced in quark-antiquark annihilation; 15% originate from gluon fusion. Top quarks are predicted to decay almost exclusively to a W boson and a bottom quark. According to the number of hadronic W decays, top events are classified into all-jets, lepton+jets and dilepton events. The lepton+jets channel is characterized by four jets, one isolated, energetic charged lepton and missing transverse energy. With 30%, the branching fraction of the lepton+jets channel is about seven times larger than the one of the dilepton channel whereas the signal to background ratio is about three times smaller. The main background in this final state comes from W +jets events. Instrumental background arises from events in which a jet is misidentified as an electron and events with heavy hadrons that decay into leptons which pass the isolation requirements. The topology of the dilepton channel is described by two jets, two isolated, energetic charged leptons and significant missing transverse energy from the undetected neutrinos. The main background are Z + jets and diboson events (WW/WZ/ZZ+jets) as well as instrumental background as characterized above. At the D0 experiment, different techniques are used to measure the top quark mass. They are summarized in the following sections together with the first measurement of the top anti-top quark mass difference and the first precise determination of the top quark width.

Grohsjean, Alexander; /IRFU, SPP, Saclay

2010-01-01T23:59:59.000Z

274

Real Time Location Tool For Precision Tracking Of Passive UHF RFID Tags In Two Dimensions.  

E-Print Network (OSTI)

??Bredow, Jonathan This thesis addresses this problem of a precise RTLS (Real Time Location System) by implementing a Passive UHF RFID system. A software is… (more)

Kenarangui, Nasir

2011-01-01T23:59:59.000Z

275

A priori precision estimation for neutron triples counting  

SciTech Connect

The nondestructive assay of Plutonium bearing items for criticality, safety, security, safeguards, inventory balance, process control, waste management and compliance is often undertaken using correlated neutron counting. In particular Multiplicity Shift Register analysis allows one to extract autocorrelation parameters from the pulse train which can, within the framework of a simple interpretational model, be related to the effective {sup 240}Pu spontaneous fission mass present. The effective {sup 240}Pu mass is a weighted sum of the {sup 238}Pu, {sup 240}Pu and {sup 242}Pu masses so if the relative isotopic composition of the Pu can be established from the measured {sup 240}Pu effective mass one can estimate the total Pu mass and also the masses of the individual isotopes, example the fissile species {sup 239}Pu and {sup 241}Pu. In multiplicity counting three counting rates are obtained. These are the Singles, Doubles and Triples rates. The Singles rate is just the gross, totals or trigger rate. The Doubles and Triples rates are calculated from factorial moments of the observed signal triggered neutron multiplicity distributions following spontaneous fission in the item and can be thought of as the rate of observed coincident pairs and coincident triplets on the pulse train. Coincident events come about because the spontaneous fission and induced fission chains taking place in the item result in bursts of neutrons. These remain time correlated during the detection process and so retain information, through the burst size distribution, about the Pu content. In designing and assessing the performance of a detector system to meet a given goal it is necessary to make a priori estimates of the counting precision for all three kinds of rates. This is non-trivial because the counting does not obey the familiar rules of a Poissonian counting experiment because the pulse train has time correlated events on it and the train is sampled by event triggered gates that may overlap. For Singles and Doubles simple approximate analytical empirical rules for how to estimate the variance have been developed guided by theory and refined by experiment. However, for Triples no equivalent rules have been put forward and tested until now. In this work we propose an analytical expression, the CSH relation, for the variance on the Triples count and exercise it against experimental data gathered for Pu items measured in the Los Alamos National Laboratory's Epithermal Neutron Multiplicity Counter (ENMC). Preliminary results are encouraging and reasonable agreement with observation, considered fit for scoping studies, is obtained. We have also looked at the behavior using Monte Carlo simulations. (authors)

Croft, S.; Swinhoe, M. T.; Henzl, V. [Safeguards Science and Technology Group N-1, Nuclear Nonproliferation Div., Los Alamos National Laboratory, Los Alamos, NM 87545 (United States)

2011-07-01T23:59:59.000Z

276

The High-Radon Project  

NLE Websites -- All DOE Office Websites (Extended Search)

indoor radon concentrations across the United States. The purpose of this work is to help state and other agencies identify high-radon counties and areas more precisely so that...

277

Precision Shock Tuning on the National Ignition Facility  

E-Print Network (OSTI)

Ignition implosions on the National Ignition Facility [ J.?D. Lindl et al. Phys. Plasmas 11 339 (2004)] are underway with the goal of compressing deuterium-tritium fuel to a sufficiently high areal density (?R) to sustain ...

Frenje, Johan A.

278

Wideband precision analog telemetry link using digital techniques  

SciTech Connect

A highly linear Wideband Analog Fiber Optic Link is described which samples at a 1 MHz rate with 10-bit accuracy and transmits and receives by means of a high speed PDM code. Aliasing and sampling effects are fully suppressed and a nearly Gaussian pulse response is attained with a 2 ..mu..sec risetime. Analog signals are recovered with very low distortion and d.c. drift and a S/N ratio of better than 52 db.

Hearn, W.E.

1982-10-01T23:59:59.000Z

279

Geothermal fracture stimulation technology. Volume II. High-temperature proppant testing  

DOE Green Energy (OSTI)

Data were obtained from a newly built proppant tester, operated at actual geothermal temperatures. The short term test results show that most proppants are temperature sensitive, particularly at the higher closure stresses. Many materials have been tested using a standard short-term test, i.e., fracture-free sand, bauxite, and a resin-coated sand retained good permeability at the high fluid temperatures in brine over a range of closure stresses. The tests were designed to simulate normal closure stress ranges for geothermal wells which are estimated to be from 2000 to 6000 psi. Although the ultra high closure stresses in oil and gas wells need not be considered with present geothermal resources, there is a definite need for chemically inert proppants that will retain high permeability for long time periods in the high temperature formations.

Not Available

1980-07-01T23:59:59.000Z

280

A framework for wireless sensor networks management for precision viticulture and agriculture based on IEEE 1451 standard  

Science Conference Proceedings (OSTI)

Precision viticulture (PV) and precision agriculture (PA) requires the acquisition and processing of a vast collection of data coming typically from large scale and heterogeneous sensor networks. Unfortunately, sensor integration is far from being simple ... Keywords: Gateway, IEEE 1451, IEEE 802.15.4, Precision agriculture, Precision viticulture, Wireless sensor networks

Miguel A. Fernandes, Samuel G. Matos, Emanuel Peres, Carlos R. Cunha, Juan A. LóPez, P. J. S. G. Ferreira, M. J. C. S. Reis, Raul Morais

2013-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "high precision tester" 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

Farmers' perception of precision technology: The case of autosteer adoption by cotton farmers  

Science Conference Proceedings (OSTI)

Precision agriculture and autosteer technology are, overall, profitable investments for farmers, as previous literature has established. However, what has not been investigated is whether or not farmers perceive these technologies as such. This research ... Keywords: Autosteer, Farmers' perception, Input cost saving, MNL, Multinomial logit estimation, PA, Precision agriculture, RTK, SCPF, Technology adoption

Jeremy M. D'Antoni; Ashok K. Mishra; Hyunjeong Joo

2012-09-01T23:59:59.000Z

282

Methodology for the use of DSSAT models for precision agriculture decision support  

Science Conference Proceedings (OSTI)

A prototype decision support system (DSS) called Apollo was developed to assist researchers in using the Decision Support System for Agrotechnology Transfer (DSSAT) crop growth models to analyze precision farming datasets. Because the DSSAT models are ... Keywords: Crop models, DSSAT, Decision support system, Precision farming, Prescriptions

Kelly R. Thorp; Kendall C. DeJonge; Amy L. Kaleita; William D. Batchelor; Joel O. Paz

2008-12-01T23:59:59.000Z

283

Optimizing lifetime for continuous data aggregation with precision guarantees in wireless sensor networks  

Science Conference Proceedings (OSTI)

This paper exploits the tradeoff between data quality and energy consumption to extend the lifetime of wireless sensor networks. To obtain an aggregate form of sensor data with precision guarantees, the precision constraint is partitioned and allocated ... Keywords: data accuracy, data aggregation, energy efficiency, network lifetime, sensor network

Xueyan Tang; Jianliang Xu

2008-08-01T23:59:59.000Z

284

MechMeasureCalbration  

NLE Websites -- All DOE Office Websites (Extended Search)

range and up to 40 ft. depth range) * Wilson Instron Hardness testers * Non-contact laser measuring system * Avant 300 optical video inspection sys- tem * Precision pins in...

285

A Search for non-Newtonian force in a precision measurement of the scattering of slow neutrons in Xenon gas  

E-Print Network (OSTI)

An experimental search for non-newtonian, gravity-like force in a precision measurement of the scattering of slow neutrons in Xenon gas is proposed. A preliminary experiment with small statistics of 25 hours irradiation time was performed and the observed scattering distribution is consistent with the expectation with no additional forces. A 95% CL limit on the coupling strength for a hypothetical force of 1 nm interaction range was evaluated to be 2*10^-15. The expected sensitivity for a planned high statistics runs is discussed.

Yoshio Kamiya; Misato Tani; Sachio Komamiya; Guinyun Kim; Kyungsuk Kim

2013-09-13T23:59:59.000Z

286

Precision Solar Neutrino Measurements with the Sudbury Neutrino Observatory  

Science Conference Proceedings (OSTI)

The Sudbury Neutrino Observatory (SNO) is the first experiment to measure the total flux of active, high-energy neutrinos from the sun. Results from SNO have solved the long-standing 'Solar Neutrino Problem' by demonstrating that neutrinos change flavor. SNO measured the total neutrino flux with the neutral-current interaction of solar neutrinos with 1000 tonnes of D{sub 2}O. In the first two phases of the experiment we detected the neutron from that interaction by capture on deuterium and capture on chlorine, respectively. In the third phase an array of {sup 3}He proportional counters was deployed in the detector. This allows a measurement of the neutral-current neutrons that is independent of the Cherenkov light detected by the PMT array. We are currently developing a unique, detailed simulation of the current pulses from the proportional-counter array that will be used to help distinguish signal and background pulses.

Oblath, Noah [Center for Experimental Nuclear Physics and Astrophysics University of Washington, Seattle, WA (United States)

2007-10-26T23:59:59.000Z

287

Dual-transponder Precision Navigation System for Synthetic Aperture Sonar  

E-Print Network (OSTI)

The technical details of a dual-transponder, long-baseline positioning system to measure the sway of a free towed Synthetic Aperture Sonar (SAS) are presented. The sway is measured with respect to freely deployed, battery powered, transponders which sit stationary on the seabed connected via cables to floating buoys housing high-accuracy GPS timing receivers. A T/R switch allows a single hydrophone on each transponder to alternately receive and transmit linear FM chirp signals. The time of flight of the signals is determined by matched-filtering using a DSP and transmitted to the towboat for storage in real time using RF modems. The sway information is completely independent for each sonar ping and allows the deblurring of the SAS images by post processing. A Matlab simulation predicts a worst case sway accuracy of cm.

E N Pilbrow; M P Hayes; P T Gough

2002-01-01T23:59:59.000Z

288

Development of precision machining and inspection technology for structural ceramics  

SciTech Connect

Finish machining operations contribute the majority of the costs associated with fabricating high quality ceramic products. These components are typically used in harsh environments such as diesel engines, the defense industry, and automotive applications. The required finishing operations involve a variety of technology areas including process controls, process analysis, product certification, etc. and are not limited only to component grinding methods. The broad range of manufacturing problem solving expertise available in Oak Ridge provided resources that were far beyond what is available to the Coors manufacturing sites. Coors contributed equipment, such as the computer controls and part handling mechanisms associated with a state-of-the-art inspection machine plus operation-specific experience base. In addition, addressing these challenging tasks enabled Oak Ridge personnel to maintain familarity with rapidly advancing technologies, such as those associated with machine vision equipment, process monitoring techniques, and computer control systems.

Barkman, W.E.

1997-03-06T23:59:59.000Z

289

How Can a Heavy Higgs Boson be Consistent with the Precision Electroweak Measurements?  

SciTech Connect

The fit of precision electroweak data to the Minimal Standard Model currently gives an upper limit on the Higgs boson mass of 170 GeV at 95% confidence. Nevertheless, it is often said that the Higgs boson could be much heavier in more general models. In this paper, we critically review models that have been proposed in the literature that allow a heavy Higgs boson consistent with the precision electroweak constraints. All have unusual features, and all can be distinguished from the Minimal Standard Model either by improved precision measurements or by other signatures accessible to next-generation colliders.

Peskin, Michael E

2001-02-01T23:59:59.000Z

290

PRECISION CLEANING OF SEMICONDUCTOR SURFACES USING CARBON DIOXIDE-BASED FLUIDS  

SciTech Connect

The Los Alamos National Laboratory, on behalf of the Hewlett-Packard Company, is conducting tests of a closed-loop CO{sub 2}-based supercritical fluid process, known as Supercritical CO{sub 2} Resist Remover (SCORR). We have shown that this treatment process is effective in removing hard-baked, ion-implanted photoresists, and appears to be fully compatible with metallization systems. We are now performing experiments on production wafers to assess not only photoresist removal, but also residual surface contamination due to particulate and trace metals. Dense-phase (liquid or supercritical) CO{sub 2}, since it is non-polar, acts like an organic solvent and therefore has an inherently high volubility for organic compounds such as oils and greases. Also, dense CO{sub 2} has a low-viscosity and a low dielectric constant. Finally, CO{sub 2} in the liquid and supercritical fluid states can solubilize metal completing agents and surfactants. This combination of properties has interesting implications for the removal not only of organic films, but also trace metals and inorganic particulate. In this paper we discuss the possibility of using CO{sub 2} as a precision-cleaning solvent, with particular emphasis on semiconductor surfaces.

J. RUBIN; L. SIVILS; A. BUSNAINA

1999-07-01T23:59:59.000Z

291

Precision Manufacturing of Inertial Confinement Fusion Double Shell Laser Targets for OMEGA  

SciTech Connect

Double shell targets have been built by Lawrence Livermore National Laboratory (LLNL) for inertial confinement fusion (ICF) experiments on the Omega laser at the University of Rochester and as a prelude to similar experiments on NIF. Of particular interest to ICF studies are high-precision double shell implosion targets for demonstrating thermonuclear ignition without the need for cryogenic preparation. Because the ignition tolerance to interface instabilities is rather low, the manufacturing requirements for smooth surface finishes and shell concentricity are particularly strict. This paper describes a deterministic approach to manufacturing and controlling error sources in each component. Included is the design philosophy of why certain manufacturing techniques were chosen to best reduce the errors within the target. The manufacturing plan developed for this effort created a deterministic process that, once proven, is repeatable. By taking this rigorous approach to controlling all error sources during the manufacture of each component and during assembly, we have achieved the overall 5 {micro}m dimensional requirement with sub-micron surface flaws. Strengths and weaknesses of the manufacturing process will be discussed.

Amendt, P A; Bono, M J; Hibbard, R L; Castro, C; Bennett, D W

2003-11-21T23:59:59.000Z

292

Precise system stabilization at SLC using dither techniques  

SciTech Connect

A data acquisition method has been developed at the SLAC Linear Collider (SLC) that provides accurate beam parameter information using sub-tolerance excitation and synchronized detection. This is being applied to several SLC sub-systems to provide high speed feedback on beam parameters such as linac output energy spread. The method has significantly improved control of the linac energy spread. The linac average phase offset ({phi}), used to compensate the effects of longitudinal wakefields, is adjusted {plus_minus}1 control bit (about 0.18{degree} S-band or 20% of tolerance), in a continuous fashion. Properly coordinated beam energy measurements provide a measure of the derivative of the accelerating voltage (dE/d{phi}). The position of the beam on the RF wave can thus be determined to {plus_minus} 0.3{degree} in about 5 seconds. The dithering does not contribute significantly to the energy jitter of the SLC and therefore does not adversely affect routine operation. Future applications include control of the interaction region beam size and orientation.

Ross, M.C.; Hendrickson, L.; Himel, T.; Miller, E.

1993-04-01T23:59:59.000Z

293

Repeat-Sequence Coding for Improved Precision of Doppler Sonar and Sodar  

Science Conference Proceedings (OSTI)

Repeat-sequence coding is a robust method for improving the precision of velocity estimates from incoherent Doppler sounders. The method involves transmitting a number of repeats of a broadband “subcode.” The Doppler shift is estimated from the ...

R. Pinkel; J. A. Smith

1992-04-01T23:59:59.000Z

294

Precise Measurement of Strontium-82 Radioactivity in the Sr-Rb PET  

Office of Science (SC) Website

Precise Measurement of Strontium-82 Precise Measurement of Strontium-82 Radioactivity in the Sr-Rb PET Generator Nuclear Physics (NP) NP Home About Research Facilities Science Highlights Benefits of NP Spinoff Applications Spinoff Archives SBIR/STTR Applications of Nuclear Science and Technology Funding Opportunities Nuclear Science Advisory Committee (NSAC) News & Resources Contact Information Nuclear Physics U.S. Department of Energy SC-26/Germantown Building 1000 Independence Ave., SW Washington, DC 20585 P: (301) 903-3613 F: (301) 903-3833 E: sc.np@science.doe.gov More Information » Spinoff Archives Precise Measurement of Strontium-82 Radioactivity in the Sr-Rb PET Generator Print Text Size: A A A RSS Feeds FeedbackShare Page Application/instrumentation: Precise measurement of 82Sr radioactivity in the Sr-Rb PET generatorm

295

Pneumatic brake control for precision stopping of heavy-duty vehicles  

E-Print Network (OSTI)

stopping” of a 40 foot CNG bus for the Bus Precision Dockingfor two different 40 foot CNG buses (c1 and c2). Althoughpressure of two different CNG buses (c1 and c2) speeds since

Bu, Fanping; Tan, Han-Shue

2007-01-01T23:59:59.000Z

296

Precise orbit determination of the Mars Odyssey spacecraft and geodetic inversion for the Martian gravity field  

E-Print Network (OSTI)

Remote sensing techniques are widely used in planetary science for acquiring precise, global inforniation about an object. One of these techniques consists of the study of the radio signals emitted by a spacecraft, from ...

Mazarico, Erwan Matías Alexandre, 1981-

2004-01-01T23:59:59.000Z

297

Selecting Efficient Phase Estimation With Constant-Precision Phase Shift Operators  

E-Print Network (OSTI)

We investigate the cost of three phase estimation procedures that require only constant-precision phase shift operators. The cost is in terms of the number of elementary gates, not just the number of measurements. Faster phase estimation requires the minimal number of measurements with a \\log * factor of reduction when the required precision n is large. The arbitrary constant-precision approach (ACPA) requires the minimal number of elementary gates with a minimal factor of 14 of reduction in comparison to Kitaev's approach. The reduction factor increases as the precision gets higher in ACPA. Kitaev's approach is with a reduction factor of 14 in comparison to the faster phase estimation in terms of elementary gate counts.

Chen-Fu Chiang

2013-06-12T23:59:59.000Z

298

Argonne CNM Highlight: World?s Most Precise ?Hard X-Ray?  

NLE Websites -- All DOE Office Websites (Extended Search)

World's Most Precise "Hard X-Ray" Nanoprobe Activated X-rays from an APS undulator exiting the front end window of the nanoprobe beamline. X-rays from an APS undulator exiting the...

299

Pages that link to "Hon Hai Precision Industry Co Ltd" | Open...  

Open Energy Info (EERE)

| 500) Retrieved from "http:en.openei.orgwikiSpecial:WhatLinksHereHonHaiPrecisionIndustryCoLtd" Special pages About us Disclaimers Energy blogs Developer services OpenEI...

300

Probabilistic modelling of LORAN-C for non-precision approaches  

E-Print Network (OSTI)

A mathematical model of the expected position errors encountered from LORAN-C during a non precision approach was formulated. From this, position error ellipses were generated that corresponded to two time difference ...

Einhorn, John Kenneth

1985-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "high precision tester" 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

Precision measurement of the neutron spin dependent structure functions  

Science Conference Proceedings (OSTI)

In experiment E154 at the Stanford Linear Accelerator Center the spin dependent structure function g{sub 1}{sup n} (x, Q{sup 2}) of the neutron was measured by scattering longitudinally polarized 48.3 GeV electrons off a longitudinally polarized {sup 3}He target. The high beam energy allowed the author to extend the kinematic coverage compared to the previous SLAC experiments to 0.014 {le} x {le} 0.7 with an average Q{sup 2} of 5 GeV{sup 2}. The author reports the integral of the spin dependent structure function in the measured range to be {integral}{sub 0.014}{sup 0.7} dx g{sub 1}{sup n}(x, 5 GeV{sup 2}) = {minus}0.036 {+-} 0.004(stat.) {+-} 0.005(syst.). The author observes relatively large values of g{sub 1}{sup n} at low x that call into question the reliability of data extrapolation to x {r_arrow} 0. Such divergent behavior disagrees with predictions of the conventional Regge theory, but is qualitatively explained by perturbative QCD. The author performs a Next-to-Leading Order perturbative QCD analysis of the world data on the nucleon spin dependent structure functions g{sub 1}{sup p} and g{sub 1}{sup n} paying careful attention to the experimental and theoretical uncertainties. Using the parameterizations of the helicity-dependent parton distributions obtained in the analysis, the author evolves the data to Q{sup 2} = 5 GeV{sup 2}, determines the first moments of the polarized structure functions of the proton and neutron, and finds agreement with the Bjorken sum rule.

Kolomensky, Y.G.

1997-02-01T23:59:59.000Z

302

The Effect of Mean and Differential Attenuation on the Precision and Accuracy of the Estimates of Reflectivity and Differential Reflectivity  

Science Conference Proceedings (OSTI)

Error propagation analysis is applied to evaluate the effects of correcting horizontal and differential attenuation on the precision of the estimates of reflectivity and differential reflectivity. The analysis shows that the loss of precision on ...

Enrico Torlaschi; Isztar Zawadzki

2003-03-01T23:59:59.000Z

303

Study of precision weak-link stage systems with large travel range and sub-nanometer-scale resolution  

SciTech Connect

To use x-ray optics with nanometer resolution limit, scanning x-ray nanoprobes with corresponding mechanical positioning capability need to be designed. In particular, positioning stages with both sub-nanometer resolution and a positioning/scanning range of several millimeters are required. Based on our design of precision weak-link stages with interferometric encoders for the Center for Nanoscale Materials (CNM) hard x-ray nanoprobe at the Advanced Photon Source (APS) Sector 26, we have developed a new two-dimensional (2-D) weak-link stage system for nanopositioning of a specimen holder. This system provides sub-nanometer resolution, coupled with sub-nanometer metrology at a travel range of several millimeters. The 2-D weak-link stage system is designed with high structure stiffness using laminar overconstrained weak-link mechanisms [4-6]. In this paper we present the study of a linear precision weak-link stage system with sub-centimeter travel range and sub-nanometer positioning resolution. Design of a rotary weak-link stage system with 10-nrad resolution and 10-degree-level travel range is also discussed in this paper.

Shu Deming [Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439 (United States); Maser, Jorg [Center for Nanoscale Materials, Argonne National Laboratory, Argonne, IL 60439 (United States); Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439 (United States)

2010-06-23T23:59:59.000Z

304

Desaturation Maneuvers and Precise Orbit Determination for the BepiColombo Mission  

E-Print Network (OSTI)

The purpose of this work is the analysis of the consequences that desaturation maneuvers can have in the precise orbit determination corresponding to the Radio Science Experiment (MORE) of the BepiColombo mission to Mercury. This mission is an ESA/JAXA joint project with very challenging objectives regarding geodesy, geophysics and fundamental physics. In the neighborhood of Mercury, the s/c will experience strong solar radiation pressure torques; the s/c attitude is controlled by inertial wheels that after some time reach their maximum rotation state. Then they have to be slowed down by means of thruster pulses, inducing a residual acceleration on the s/c, with a desaturation (or off-loading) maneuver. In this paper, we will show how such maneuvers affect the orbit of the s/c and the radio science measurements and, also, how to include them in the orbit determination and parameter estimation procedure. The non linear least squares fit we consider is applied on a set of observational arcs separated by intervals of time where the probe is not visible. With the current baseline of two ground stations, two maneuvers are performed per day, one during the observing session, the other in the dark. To reach the scientific goals of the mission, they have to be treated as "solve for quantities". We have developed a specific methodology based on the deterministic propagation of the orbit, which is able to deal with these variables, by connecting subsequent observational arcs in a smooth way. The numerical simulations we will show demonstrate that this constrained multi-arc strategy is able to determine the maneuvers, including the ones in the dark, together with the other parameters of interest at a high level of accuracy. The future development consists in including accelerometer readings and calibrations in the method.

Elisa Maria Alessi; Stefano Cicalo'; Andrea Milani; Giacomo Tommei

2012-02-15T23:59:59.000Z

305

A Precision Measurement of the Weak Mixing Angle in Moller Scattering at Low Q^2  

DOE Green Energy (OSTI)

The electroweak theory has been probed to a high level of precision at the mass scale of the Z{sup 0} through the joint contributions of LEP at CERN and the SLC at SLAC. The E158 experiment at SLAC complements these results by measuring the weak mixing angle at a Q{sup 2} of 0.026 (GeV/c){sup 2}, far below the weak scale. The experiment utilizes a 48 GeV longitudinally polarized electron beam on unpolarized atomic electrons in a target of liquid hydrogen to measure the parity-violating asymmetry A{sup PV} in Moeller scattering. The tree-level prediction for A{sup PV} is proportional to 1-4 sin{sup 2} {theta}{sub W}. Since sin{sup 2} {theta}{sub W} {approx} 0.25, the effect of radiative corrections is enhanced, allowing the E158 experiment to probe for physics effects beyond the Standard Model at the TeV scale. This work presents the results from the first two physics runs of the experiment, covering data collected in the year 2002. The parity-violating asymmetry A{sup PV} was measured to be A{sup PV} = -158 ppb {+-} 21 ppb (stat) {+-} 17 ppb (sys). The result represents the first demonstration of parity violation in Moeller scattering. The observed value of A{sup PV} corresponds to a measurement of the weak mixing angle of sin{sup 2} {theta}{sub W}{sup eff} = 0.2380 {+-} 0.0016(stat) {+-} 0.0013(sys), which is in good agreement with the theoretical prediction of sin{sup 2} {theta}{sub W}{sup eff} = 0.2385 {+-} 0.0006 (theory).

Jones, G.

2005-01-28T23:59:59.000Z

306

Design, implementation and testing of extended and mixed precisionBLAS  

SciTech Connect

This article describes the design rationale, a C implementation, and conformance testing of a subset of the new Standard for the BLAS (Basic Linear Algebra Subroutines): Extended and Mixed Precision BLAS. Permitting higher internal precision and mixed input/output types and precisions allows us to implement some algorithms that are simpler, more accurate, and sometimes faster than possible without these features. The new BLAS are challenging to implement and test because there are many more subroutines than in the existing Standard, and because we must be able to assess whether a higher precision is used for internal computations than is used for either input or output variables. We have therefore developed an automated process of generating and systematically testing these routines. Our methodology is applicable to languages besides C. In particular, our algorithms used in the testing code will be valuable to all other BLAS implementors. Our extra precision routines achieve excellent performance--close to half of the machine peak Megaflop rate even for the Level 2 BLAS, when the data access is stride one.

Li, X.S.; Demmel, J.W.; Bailey, D.H.; Henry, G.; Hida, Y.; Iskandar, J.; Kahan, W.; Kapur, A.; Martin, M.C.; Tung, T.; Yoo, D.J.

2000-10-20T23:59:59.000Z

307

Aerodyne Develops an Aircraft-Deployable Precision Aerosol Analyzer | U.S.  

Office of Science (SC) Website

Aerodyne Develops an Aircraft-Deployable Precision Aerosol Aerodyne Develops an Aircraft-Deployable Precision Aerosol Analyzer Small Business Innovation Research (SBIR) and Small Business Technology Transfer (STTR) SBIR/STTR Home About Funding Opportunity Announcements (FOAs) Applicant and Awardee Resources Commercialization Assistance Other Resources Awards SBIR/STTR Highlights Reporting Fraud Contact Information Small Business Innovation Research and Small Business Technology Transfer U.S. Department of Energy SC-29/Germantown Building 1000 Independence Ave., SW Washington, DC 20585 P: (301) 903-5707 F: (301) 903-5488 E: sbir-sttr@science.doe.gov More Information » January 2013 Aerodyne Develops an Aircraft-Deployable Precision Aerosol Analyzer Aerodyne Research Inc. develops an aerosol mass spectrometer (AMS) that fills a critical need for size-resolved, quantitative chemical composition

308

Science.gov 3.0 Launched; Offers Increased Precision Searches of Federal  

Office of Science (SC) Website

Science.gov Science.gov 3.0 Launched; Offers Increased Precision Searches of Federal Science Database News Featured Articles Science Headlines 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 Presentations & Testimony News Archives Contact Information Office of Science U.S. Department of Energy 1000 Independence Ave., SW Washington, DC 20585 P: (202) 586-5430 11.15.05 Science.gov 3.0 Launched; Offers Increased Precision Searches of Federal Science Database Print Text Size: A A A Subscribe FeedbackShare Page Offers Increased Precision Searches of Federal Science Database November 15, 2005 WASHINGTON, DC - The latest version of Science.gov External link was launched today allowing more refined queries for searches of federal science databases. While Science.gov 3.0 is available to everyone, these

309

THE AUTOIGNITION OF CYCLOPENTANE IN AN IGNITION QUALITY TESTER  

Science Conference Proceedings (OSTI)

Cyclopentane, a flammable hydrocarbon, is being considered as a working fluid for waste heat recovery applications using Organic Rankine Cycles with Direct Evaporators. A postulated failure mode consisting of a pinhole leak in a heat exchanger tube raises safety concerns due to autoignition of the working fluid. The ignition delay time (IDT) of cyclopentane was measured using an Ignition Quality Test™ (IQT™) device. Hot, vitiated air was used to simulate turbine exhaust gas (TEG). Experiments were conducted in accordance with ASTM D6890 (with exception to charge pressure and temperature) to determine ignition delay of the fuel at atmospheric pressure for vitiated air (13.3% oxygen). The test matrixencompassed equivalence ratios from 0.5 to 5.0 and chamber temperatures ranging from 673 to 823 K to establish a set of ignition delay curves. IDT was observed to decrease with increasing temperature and equivalence ratio. For the cases tested, no ignition was observed at temperatures at or below 723 K or at an equivalence ratio of 0.5.

Donna Post Guillen

2012-08-01T23:59:59.000Z

310

Dual wavelength laser damage testing for high energy lasers.  

Science Conference Proceedings (OSTI)

As high energy laser systems evolve towards higher energies, fundamental material properties such as the laser-induced damage threshold (LIDT) of the optics limit the overall system performance. The Z-Backlighter Laser Facility at Sandia National Laboratories uses a pair of such kiljoule-class Nd:Phosphate Glass lasers for x-ray radiography of high energy density physics events on the Z-Accelerator. These two systems, the Z-Beamlet system operating at 527nm/ 1ns and the Z-Petawatt system operating at 1054nm/ 0.5ps, can be combined for some experimental applications. In these scenarios, dichroic beam combining optics and subsequent dual wavelength high reflectors will see a high fluence from combined simultaneous laser exposure and may even see lingering effects when used for pump-probe configurations. Only recently have researchers begun to explore such concerns, looking at individual and simultaneous exposures of optics to 1064 and third harmonic 355nm light from Nd:YAG [1]. However, to our knowledge, measurements of simultaneous and delayed dual wavelength damage thresholds on such optics have not been performed for exposure to 1054nm and its second harmonic light, especially when the pulses are of disparate pulse duration. The Z-Backlighter Facility has an instrumented damage tester setup to examine the issues of laser-induced damage thresholds in a variety of such situations [2] . Using this damage tester, we have measured the LIDT of dual wavelength high reflectors at 1054nm/0.5ps and 532nm/7ns, separately and spatially combined, both co-temporal and delayed, with single and multiple exposures. We found that the LIDT of the sample at 1054nm/0.5ps can be significantly lowered, from 1.32J/cm{sup 2} damage fluence with 1054/0.5ps only to 1.05 J/cm{sup 2} with the simultaneous presence of 532nm/7ns laser light at a fluence of 8.1 J/cm{sup 2}. This reduction of LIDT of the sample at 1054nm/0.5ps continues as the fluence of 532nm/7ns laser light simultaneously present increases. The reduction of LIDT does not occur when the 2 pulses are temporally separated. This paper will also present dual wavelength LIDT results of commercial dichroic beam-combining optics simultaneously exposed with laser light at 1054nm/2.5ns and 532nm/7ns.

Atherton, Briggs W.; Rambo, Patrick K.; Schwarz, Jens; Kimmel, Mark W.

2010-05-01T23:59:59.000Z

311

Impact on Grain Quality Parameters when Nitrogen Is `Sensor Applied' by the `Hydro Precise System'  

E-Print Network (OSTI)

Yield and grain quality maps have been produced at full-scale field trials within a 10.5 ha field for four different nitrogen strategies. Grain samples have been collected directly from the grain flow of a combine harvester and analysed for quality in the laboratory and merged with the yield meter registrations. Within the field great variance was observed in yield and grain quality. This paper evaluates the impact on yield and grain quality -- protein when nitrogen is sensor applied by the Hydro-Precise N-Sensor system. The results are discussed in terms of a potential new precision nitrogen application strategy for Danish winter wheat

R.N. Jørgensen; R. N. Jørgensen

2001-01-01T23:59:59.000Z

312

Precision mass measurements of very short-lived, neutron-rich Na isotopes using a radiofrequency spectrometer  

E-Print Network (OSTI)

Mass measurements of high precision have been performed on sodium isotopes out to $^{30}$Na using a new technique of radiofrequency excitation of ion trajectories in a homogeneous magnetic field. This method, especially suited to very short-lived nuclides, has allowed us to significantly reduce the uncertainty in mass of the most exotic Na isotopes: a relative error of 5\\audi was achieved for $^{28}$Na having a half-life of only 30.5 ms and 9\\audi for the weakly produced $^{30}$Na. Verifying and minimizing binding energy uncertainties in this region of the nuclear chart is important for clarification of a long standing problem concerning the strength of the $N~=~20$ magic shell closure. These results are the fruit of the commissioning of the new experimental program Mistral.

Lunney, M D; Doubre, H; Henry, S; Monsanglant, C; De Saint-Simon, M; Thibault, C; Toader, C F; Borcea, C; Bollen, G

2001-01-01T23:59:59.000Z

313

Elementary Yet Precise Worst-Case Analysis of Floyd's Heap-Construction Program  

Science Conference Proceedings (OSTI)

The worst-case behavior of the heap-construction phase of Heapsort escaped mathematically precise characterization by a closed-form formula for almost five decades. This paper offers a proof that the exact number of comparisons of keys performed in the ... Keywords: Heapsort, sum of digits, worst-case analysis

Marek A. Suchenek

2012-01-01T23:59:59.000Z

314

Testing the Standard Model Precision Measurements of the Z and W; Search for the Higgs  

E-Print Network (OSTI)

13 Testing the Standard Model Precision Measurements of the Z and W; Search for the Higgs electrons lose en- ergy rapidly through synchrotron radiation, which varies as E4/, where is the radius first (Ref. 13.1), but with a disappointing luminosity. In July 1989, Mark II reported for the Z a mass

Murayama, Hitoshi

315

Data fusion of multi-sensor for IOT precise measurement based on improved PSO algorithms  

Science Conference Proceedings (OSTI)

This work proposes an improved particle swarm optimization (PSO) method to increase the measurement precision of multi-sensors data fusion in the Internet of Things (IOT) system. Critical IOT technologies consist of a wireless sensor network, RFID, various ... Keywords: Data fusion, Internet of things, Particle swarm optimization, RFID, Wireless sensor network

Wen-Tsai Sung; Ming-Han Tsai

2012-09-01T23:59:59.000Z

316

ProPane: fast and precise video browsing on mobile phones  

Science Conference Proceedings (OSTI)

Studies show that every fourth smartphone user watches videos on their device. However, because of increasing camera and encoding quality more and more smartphones are providing an attractive tool for creating and editing videos. The demand for smooth ... Keywords: Android, handheld devices, interface design, mobile video, multimedia, navigation, precise, touch, video browsing

Roman Ganhör

2012-12-01T23:59:59.000Z

317

GPS/INS navigation precision and its effect on airborne radio occultation retrieval accuracy  

Science Conference Proceedings (OSTI)

An airborne radio occultation (RO) system has been developed to retrieve atmospheric profiles of refractivity, moisture, and temperature. The long-term objective of such a system is deployment on commercial aircraft to increase the quantity of moisture ... Keywords: Airborne radio occultation, GPS/INS precision, Retrieval accuracy

Paytsar Muradyan; Jennifer S. Haase; Feiqin Xie; James L. Garrison; Justin Voo

2011-07-01T23:59:59.000Z

318

Precise asymptotics for the linear processes generated by associated random variables in Hilbert spaces  

Science Conference Proceedings (OSTI)

Let {@e"k,k@?Z} be a strictly stationary associated sequence of random variables taking values in a real separable Hilbert space, and {a"k;k@?Z} be a sequence of bounded linear operators. For a linear process X"k=@?"i"="-"~^~a"i(@e"k"-"i), the precise ... Keywords: Association, Bounded operator, Convergence rates, Hilbert space, Linear processes

Ke-Ang Fu; Jie Li; Ya-Juan Dong; Hui Zhou

2012-09-01T23:59:59.000Z

319

Quantifying trade-os between pest sampling time and precision in commercial  

E-Print Network (OSTI)

will increase the cost of the sampling pro- gram, where cost is measured in terms of time, labor, equipment of the resulting pest management decision. Using con- sperse stink bug (Euschistus conspersus Uhler) in processing of samples required for a precise population estimate. An insect pest with uniform ®eld dis- tribution lends

Sheridan, Jennifer

320

User boresight calibration precision for large-format head-up displays  

Science Conference Proceedings (OSTI)

The postural sway in 24 subjects performing a boresight calibration task on a large format head-up display is studied to estimate the impact of human limits on boresight calibration precision and ultimately on static registration errors. The dependent ... Keywords: augmented reality, boresight, calibration, line of sight, postural sway

Magnus Axholt; Stephen Peterson; Stephen R. Ellis

2008-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "high precision tester" 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

Precision Dual-Aquifer Dewatering at a Low Level Radiological Cleanup in New Jersey  

SciTech Connect

Cleanup of low-level radioactive wastes at the Wayne Interim Storage Site (WISS), Wayne, New Jersey during the period October, 2000 through November, 2001 required the design, installation and operation of a dual-aquifer dewatering system to support excavation of contaminated soils. Waste disposal pits from a former rare-earth processing facility at the WISS had been in contact with the water table aquifer, resulting in moderate levels of radionuclides being present in the upper aquifer groundwater. An uncontaminated artesian aquifer underlies the water table aquifer, and is a localized drinking water supply source. The lower aquifer, confined by a silty clay unit, is flowing artesian and exhibits potentiometric heads of up to 4.5 meters above grade. This high potentiometric head presented a strong possibility that unloading due to excavation would result in a ''blowout'', particularly in areas where the confining unit was < 1 meter thick. Excavation of contaminated materials w as required down to the surface of the confining unit, potentially resulting in an artesian aquifer head of greater than 8 meters above the excavation surface. Consequently, it was determined that a dual-aquifer dewatering system would be required to permit excavation of contaminated material, with the water table aquifer dewatered to facilitate excavation, and the deep aquifer depressurized to prevent a ''blowout''. An additional concern was the potential for vertical migration of contamination present in the water table aquifer that could result from a vertical gradient reversal caused by excessive pumping in the confined system. With these considerations in mind, a conceptual dewatering plan was developed with three major goals: (1) dewater the water table aquifer to control radionuclide migration and allow excavation to proceed; (2) depressurize the lower, artesian aquifer to reduce the potential for a ''blowout''; and (3) develop a precise dewatering level control mechanism to insure a vertical gradient reversal did not result in cross-contamination. The plan was executed through a hydrogeologic investigation culminating with the design and implementation of a complex, multi-phased dual-aquifer dewatering system equipped with a state of the art monitoring network.

Gosnell, A. S.; Langman, J. W. Jr.; Zahl, H. A.; Miller, D. M.

2002-02-27T23:59:59.000Z

322

Forecast for the Planck precision on the tensor to scalar ratio and other cosmological parameters  

E-Print Network (OSTI)

The Planck satellite is right now measuring with unprecedented accuracy the primary Background CMB anisotropies. The Standard Model of the Universe (including inflation) provides the context to analyze the CMB and other data. The Planck performance for r, the tensor to scalar ratio related to primordial B mode polarization, will depend on the quality of the data analysis. The Ginsburg Landau approach to inflation allows to take high benefit of the CMB data. The fourth degree double well inflaton potential gives an excellent fit to the current CMB+LSS data. We evaluate the Planck precision to the recovery of cosmological parameters within a reasonable toy model for residuals of systematic effects of instrumental and astrophysical origin based on publicly available information.We use and test two relevant models: the LambdaCDMr model, i.e. the standard LambdaCDM model augmented by r, and the LambdaCDMrT model, where the scalar spectral index, n_s, and r are related through the theoretical `banana-shaped' curve r = r(n_s) coming from the double-well inflaton potential. In the latter case, r = r(n_s) is imposed as a hard constraint in the MCMC data analysis. We take into account the white noise sensitivity of Planck in the 70, 100 and 143 GHz channels as well as the residuals from systematics errors and foregrounds. Foreground residuals turn to affect only the cosmological parameters sensitive to the B modes. The best value for r in the presence of residuals turns to be about r simeq 0.04 for both the LambdaCDMr and the LambdaCDMrT models. We compute the B mode detection probability by the most sensitive HFI-143 channel. At the level of foreground residual equal to 30% of our toy model only a 68% CL detection of r is very likely. For a 95% CL detection the level of foreground residual should be reduced to 10% or lower of the adopted toy model (ABRIDGED).

C. Burigana; C. Destri; H. J. de Vega; A. Gruppuso; N. Mandolesi; P. Natoli; N. G. Sanchez

2010-03-31T23:59:59.000Z

323

SAND2011-6616A Page 1 Session 2: High Energy Density, Plasmas...  

National Nuclear Security Administration (NNSA)

on Sandia's Z Machine: Obtaining Data with High Precision at HED Conditions Thomas R. Mattsson and Seth Root Sandia National Laboratories, Albuquerque, NM USA Summary: The Z...

324

Cost-efficient drilling using industrial robots with high-bandwidth force feedback  

Science Conference Proceedings (OSTI)

Here we present a method for high-precision drilling using an industrial robot with high-bandwidth force feedback, which is used for building up pressure to clamp-up an end-effector to the work-piece surface prior to drilling. The focus is to eliminate ... Keywords: Feedback, Force control, High-precision drilling, Industrial robotics, Motion control

Tomas Olsson; Mathias Haage; Henrik Kihlman; Rolf Johansson; Klas Nilsson; Anders Robertsson; Mats Björkman; Robert Isaksson; Gilbert Ossbahr; Torgny Brogårdh

2010-02-01T23:59:59.000Z

325

Proceedings of the meeting for coordinating precision machining of optics research and requirements  

SciTech Connect

The meeting for ''Coordinating Precision Machining of Optics Research and Requirements'' on September 18, 1975, was sponsored by the Air Force Weapons Laboratory at Kirtland AFB, NM. These proceedings contain an introduction to the meeting including a brief description of the participants and the objectives. The developments and capabilities of Union Carbide Y-12 plant are described in detail. A short summary of the new Moore no. 5 machine at Bendix, Kansas City, Mo. is included as well as a description of using light scattering for roughness characterization at Rockwell International, Rocky Flats, Colorado. The executive summary of the meeting mentions some of the discussions that also followed. Important conclusions of the meeting were that a 5 y lead time is required to obtain a machine and acquire the necessary skills for precision machining, and that demands for diamond turning optics will be increasing. (auth)

Saito, T.T.

1975-12-01T23:59:59.000Z

326

Post-buckling analysis for the precisely controlled buckling of thin film encapsulated by elastomeric subsrates.  

SciTech Connect

The precisely controlled buckling of stiff thin films (e.g., Si or GaAs nano ribbons) on the patterned surface of elastomeric substrate (e.g., poly(dimethylsiloxane) (PDMS)) with periodic inactivated and activated regions was designed by Sun et al. [Sun, Y., Choi, W.M., Jiang, H., Huang, Y.Y., Rogers, J.A., 2006. Controlled buckling of semiconductor nanoribbons for stretchable electronics. Nature Nanotechnology 1, 201-207] for important applications of stretchable electronics. We have developed a post-buckling model based on the energy method for the precisely controlled buckling to study the system stretchability. The results agree with Sun et al.'s (2006) experiments without any parameter fitting, and the system can reach 120% stretchability.

Jiang, H.; Sun, Y.; Rogers, J. A.; Huang, Y.; Arizona State Univ.; Univ. of Illinois; Northwestern Univ.

2008-04-01T23:59:59.000Z

327

Brookhaven High Energy Physics  

NLE Websites -- All DOE Office Websites (Extended Search)

High-Energy Physics High-Energy Physics High-energy physicists probe the properties and behavior of the most elementary particles in the universe. At the Alternating Gradient Synchrotron (AGS), they perform experiments of unique sensitivity using high-intensity, intermediate-energy beams. The AGS currently provides the world's most intense high-energy proton beam. It is also the world's most versatile accelerator, accelerating protons, polarized protons, and heavy ions to near the speed of light. Magnet system at Brookhaven used to measure the magnetic moment of the muon. Important discoveries in high-energy physics were made at the AGS within the last decade. An international collaboration, including key physicists from Brookhaven, performed a very high-precision measurement of a property

328

Novel Water-Neutral Diesel Fuel Processor and Sulfur Trap„Precision Combustion  

NLE Websites -- All DOE Office Websites (Extended Search)

Novel Water-Neutral Diesel Fuel Novel Water-Neutral Diesel Fuel Processor and Sulfur Trap-Precision Combustion Background Solid-Oxide Fuel Cell (SOFC) technology for auxiliary power units (APUs) offers the potential for major contributions toward Department of Energy (DOE) objectives such as clean energy deployment and improved efficiency. Reforming of conventional liquid fuels to produce synthesis gas (syngas) fuel for SOFC stacks is a practical approach for operating fuel cell APUs

329

Precise Measurements of the Kilohertz Quasi-Periodic Oscillations in 4U 1728-34  

E-Print Network (OSTI)

We have analyzed seventeen observations of the low-mass X-ray binary and atoll source 4U 1728-34, carried out by the Rossi X-ray Timing Explorer in 1996 and 1997. We obtain precise measurements of the frequencies of the two simultaneous kilohertz quasi-periodic oscillations (kHz QPOs) in this source. We show that the frequency separation between the two QPO, $\\Delta \

Mariano Mendez; Michiel van der Klis

1999-03-19T23:59:59.000Z

330

Precision Beam Parameter Monitoring in a Measurement of the Weak Mixing Angle in Moeller Scattering  

DOE Green Energy (OSTI)

A precision measurement of the parity nonconserving left-right asymmetry, A{sub LR}, in Moeller scattering (e{sup -}e{sup -} {yields} e{sup -}e{sup -}) is currently in progress at the Stanford Linear Accelerator Center (SLAC). This experiment, labeled SLAC-E158, scatters longitudinally polarized electrons off atomic electrons in an unpolarized hydrogen target at a Q{sup 2} of 0.03 (GeV/c){sup 2}. The asymmetry, which is the fractional difference in the scattering cross-sections, measures the effective pseudo-scalar weak neutral current coupling, g{sub ee}, governing Moeller scattering. This quantity is in turn proportional to (1/4 - sin{sup 2} {theta}{sub w}), where {theta}{sub w} is the electroweak mixing angle. The goal is to measure the asymmetry to a precision of 1 x 10{sup -8} which corresponds to {delta}(sin{sup 2} {theta}{sub w}) {approx} 0.0007. Since A{sub LR} is a function of the cross-sections, and the cross-sections depend on the beam parameters, the desired precision of A{sub LR} places stringent requirements on the beam parameters. This paper investigates the requirements on the beam parameters and discusses the means by which they are monitored and accounted for.

Cooke, M.S.

2005-04-11T23:59:59.000Z

331

Precision grid and hand motion for accurate needle insertion in brachytherapy  

Science Conference Proceedings (OSTI)

Purpose: In prostate brachytherapy, a grid is used to guide a needle tip toward a preplanned location within the tissue. During insertion, the needle deflects en route resulting in target misplacement. In this paper, 18-gauge needle insertion experiments into phantom were performed to test effects of three parameters, which include the clearance between the grid hole and needle, the thickness of the grid, and the needle insertion speed. Measurement apparatus that consisted of two datum surfaces and digital depth gauge was developed to quantify needle deflections. Methods: The gauge repeatability and reproducibility (GR and R) test was performed on the measurement apparatus, and it proved to be capable of measuring a 2 mm tolerance from the target. Replicated experiments were performed on a 2{sup 3} factorial design (three parameters at two levels) and analysis included averages and standard deviation along with an analysis of variance (ANOVA) to find significant single and two-way interaction factors. Results: Results showed that grid with tight clearance hole and slow needle speed increased precision and accuracy of needle insertion. The tight grid was vital to enhance precision and accuracy of needle insertion for both slow and fast insertion speed; additionally, at slow speed the tight, thick grid improved needle precision and accuracy. Conclusions: In summary, the tight grid is important, regardless of speed. The grid design, which shows the capability to reduce the needle deflection in brachytherapy procedures, can potentially be implemented in the brachytherapy procedure.

McGill, Carl S.; Schwartz, Jonathon A.; Moore, Jason Z.; McLaughlin, Patrick W.; Shih, Albert J. [Biomedical Engineering Department, University of Michigan, Ann Arbor, Michigan 48109 (United States); Mechanical Engineering Department, University of Michigan, Ann Arbor, Michigan 48109 (United States); Department of Radiation Oncology, University of Michigan, Ann Arbor, Michigan 48109 (United States); Biomedical Engineering and Mechanical Engineering Departments, University of Michigan, Ann Arbor, Michigan 48109 (United States)

2011-08-15T23:59:59.000Z

332

Constraint-based 3D direct manipulations for intuitive and precise solid modelling in a virtual reality environment  

Science Conference Proceedings (OSTI)

The absence of constraints when interacting with virtual objects is one of the major limitations in the current Virtual Reality (VR) environments. Without constraints, it is difficult to perform precise interactive manipulations and precise solid modelling ... Keywords: allowable motions, constraint recognition, constraint solving, constraint-based manipulations, solid modelling, virtual reality

Y. Zhong; W. Müller-Wittig

2002-09-01T23:59:59.000Z

333

Introduction NMR 2-D Ion Arrays Electronic Networking Conclusions An investigation of precision and scaling issues in  

E-Print Network (OSTI)

Introduction NMR 2-D Ion Arrays Electronic Networking Conclusions An investigation of precision Department of Physics Massachusetts Institute of Technology 11 March 2009 (1/50) #12;Introduction NMR 2-D Ion precision (2/50) #12;Introduction NMR 2-D Ion Arrays Electronic Networking Conclusions Digital simulation

Raizen, Mark G.

334

Identifying the sources of subsurface contamination at the Hanford site in Washington using high-precision uranium isotopic measurements  

E-Print Network (OSTI)

enrichment for nuclear applications or to changes resulting from the burn up of natural or enriched uranium

Christensen, John N.; Dresel, P. Evan; Conrad, Mark E.; Maher, Kate; DePaolo, Donald J.

2004-01-01T23:59:59.000Z

335

OPTICAL TIMING RECEIVER FOR THE NASA SPACEBORNE RANGING SYSTEM, PART II: HIGH PRECISION EVENT-TIMING DIGITIZER  

E-Print Network (OSTI)

Commands: NI : NI F(24)A(0)Sl: NIF (25)A(0) : NI F(25)A(0)Sl: NI F(26)A(0)Sl: NIF (27)A(O) : ZSl: X: Q: Tandem

Leskovar, B.

2011-01-01T23:59:59.000Z

336

OPTICAL TIMING RECEIVER FOR THE NASA SPACEBORNE RANGING SYSTEM, PART II: HIGH PRECISION EVENT-TIMING DIGITIZER  

E-Print Network (OSTI)

Register only. Rear panel: TTL, (20 ns min. ) pusle clearsMISSION CLEAR connector: TTL (20 ns min. ) pulse clearsconnectors for the slow (TTL) signals. Front panels have

Leskovar, B.

2011-01-01T23:59:59.000Z

337

A high precision instrument to measure angular and binocular deviation introduced by aircraft windscreens by using a shadow casting technique  

SciTech Connect

Objects viewed through transparent sheets with residual non-parallelism and irregularity appear shifted and distorted. This distortion is measured in terms of angular and binocular deviation of an object viewed through the transparent sheet. The angular and binocular deviations introduced are particularly important in the context of aircraft windscreens and canopies as they can interfere with decision making of pilots especially while landing, leading to accidents. In this work, we have developed an instrument to measure both the angular and binocular deviations introduced by transparent sheets. This instrument is especially useful in the qualification of aircraft windscreens and canopies. It measures the deviation in the geometrical shadow cast by a periodic dot pattern trans-illuminated by the distorted light beam from the transparent test specimen compared to the reference pattern. Accurate quantification of the shift in the pattern is obtained by cross-correlating the reference shadow pattern with the specimen shadow pattern and measuring the location of the correlation peak. The developed instrument is handy to use and computes both angular and binocular deviation with an accuracy of less than {+-}0.1 mrad ( Almost-Equal-To 0.036 mrad) and has an excellent repeatability with an error of less than 2%.

Shivananju, B. N.; Yamdagni, S. [Department of Instrumentation and Applied Physics, Indian Institute of Science, Bangalore 560012 (India); Vasu, R. M. [Department of Instrumentation and Applied Physics, Indian Institute of Science, Bangalore 560012 (India); Applied Photonics Initiative, Indian Institute of Science, Bangalore 560012 (India); Asokan, S. [Department of Instrumentation and Applied Physics, Indian Institute of Science, Bangalore 560012 (India); Applied Photonics Initiative, Indian Institute of Science, Bangalore 560012 (India); Robert Bosch Centre for Cyber Physical Systems, Indian Institute of Science, Bangalore 560012 (India)

2012-12-15T23:59:59.000Z

338

New line classifications in Ho I based on high-precision hyperfine-structure measurement of low levels  

Science Conference Proceedings (OSTI)

Doppler-free laser-fluorescence and laser-rf double-resonance studies have been made of the hyperfine structure (hfs) of four strong, previously unclassified visible lines in Ho I; all are shown to connect with low levels. The hfs of the 4f/sup 11/6s/sup 2/ /sup 4/I/sub 11/2,9/2/ levels is measured in detail, allowing evaluation of the dipole (a/sup 01/, a/sup 12/, a/sup 10/) and quadrupole (b/sup 02/,b/sup 11/,b/sup 13/) hfs radial integrals. The results are in close agreement with the ab initio values of Lindgren and Rosen (Case Stud. Atom. Phys. 4, 93--292 (1974). The value found for b/sup 02/ in the 4f/sup 11/6s/sup 2/ configuration is in reasonable agreement with that of Wyart and Camus (Physica 93C, 227-236 (1978)), thereby confirming their finding of a substantial dependence of this parameter on the number of 4f electrons in the core.

Childs, W.J.; Cok, D.R.; Goodman, L.S.

1983-02-01T23:59:59.000Z

339

High?precision ? decay half?life measurements of proton?rich nuclei for testing the CVC hypothesis  

Science Conference Proceedings (OSTI)

The experimental study of super?allowed nuclear ? decays serves as a sensitive probe of the conservation of the weak vector current (CVC) and allows tight limits to be set on the presence of scalar or right?handed currents. Once CVC is verified

T. Kurtukian?Nieto; NEX group of CENBG

2011-01-01T23:59:59.000Z

340

Identifying the sources of subsurface contamination at the Hanford site in Washington using high-precision uranium isotopic measurements  

E-Print Network (OSTI)

Batches Processed Through Hanford Separations Plants, 1944Rev. 0, Lockheed Martin Hanford Corporation, Richland, WA,11) Hartman, M.J. , ed. Hanford Site Groundwater Monitoring:

Christensen, John N.; Dresel, P. Evan; Conrad, Mark E.; Maher, Kate; DePaolo, Donald J.

2004-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "high precision tester" 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

Identifying the sources of subsurface contamination at the Hanford site in Washington using high-precision uranium isotopic measurements  

E-Print Network (OSTI)

Secretary of the Office of Environmental Management,Office of Science and Technology, Environmental Management

Christensen, John N.; Dresel, P. Evan; Conrad, Mark E.; Maher, Kate; DePaolo, Donald J.

2004-01-01T23:59:59.000Z

342

Quest for precision in hadronic cross sections at low energy: Monte Carlo tools vs. experimental data  

E-Print Network (OSTI)

We present the achievements of the last years of the experimental and theoretical groups working on hadronic cross section measurements at the low energy e+e- colliders in Beijing, Frascati, Ithaca, Novosibirsk, Stanford and Tsukuba and on tau decays. We sketch the prospects in these fields for the years to come. We emphasise the status and the precision of the Monte Carlo generators used to analyse the hadronic cross section measurements obtained as well with energy scans as with radiative return, to determine luminosities and tau decays. The radiative corrections fully or approximately implemented in the various codes and the contribution of the vacuum polarisation are discussed.

Actis, S; Arbuzov, A; Balossini, G; Beltrame, P; Bignamini, C; Bonciani, R; Carloni Calame, C M; Cherepanov, V; Czakon, M; Czyz, H; Denig, A; Eidelman, S; Fedotovich, G V; Ferroglia, A; Gluza, J; Grzeli nska, A; Gunia, M; Hafner, A; Ignatov, F; Jadach, S; Jegerlehner, F; Kalinowski, A; Kluge, W; Korchin, A; Kuhn, J H; Kuraev, E A; Lukin, P; Mastrolia, P; Montagna, G; Muller, S E; Nguyen, F; Nicrosini, O; Nomura, D; Pakhlova, G; Pancheri, G; Passera, M; Penin, A; Piccinini, F; Placzek, W; Przedzinski, T; Remiddi, E; Riemann, T; Rodrigo, G; Roig, P; Shekhovtsova, O; Shen, C P; Sibidanov, A L; Teubner, T; Trentadue, L; Venanzoni, G; van der Bij, J J; Wang, P; Ward, B F L; Was, Z; Worek, M; Yuan, C Z

2010-01-01T23:59:59.000Z

343

Testing the Standard Model by precision measurement of the weak charges of quarks  

SciTech Connect

In a global analysis of the latest parity-violating electron scattering measurements on nuclear targets, we demonstrate a significant improvement in the experimental knowledge of the weak neutral-current lepton-quark interactions at low-energy. The precision of this new result, combined with earlier atomic parity-violation measurements, limits the magnitude of possible contributions from physics beyond the Standard Model - setting a model-independent, lower-bound on the scale of new physics at ~1 TeV.

Ross Young; Roger Carlini; Anthony Thomas; Julie Roche

2007-05-01T23:59:59.000Z

344

Precise Measurements of Beam Spin Asymmetries in Semi-Inclusive ?^0 production  

DOE Green Energy (OSTI)

We present studies of single-spin asymmetries for neutral pion electroproduction in semi-inclusive deep-inelastic scattering of 5.776 GeV polarized electrons from an unpolarized hydrogen target, using the CEBAF Large Acceptance Spectrometer (CLAS) at the Thomas Jefferson National Accelerator Facility. A substantial sin {phi}{sub h} amplitude has been measured in the distribution of the cross section asymmetry as a function of the azimuthal angle {phi}{sub h} of the produced neutral pion. The dependence of this amplitude on Bjorken x and on the pion transverse momentum is extracted with significantly higher precision than previous data and is compared to model calculations.

Holtrop, M; Hyde, C E; Ireland, D G; Isupov, E L; Jawalkar, S S; Jenkins, D; Jo, H S; Joo, K; Keller, D; Khandaker, M; Khetarpal, P; Kim, A; Kimy, W; Klein, A; Klein, F J; Kubarovsky, V; Kuhn, S E; Kuleshov, S V; Kuznetsov, V; Kvaltine, N D; Livingston, K; Lu, H Y; MacGregor, I.J. D.; Markov, N; Mayer, M; McAndrew, J; McKinnon, B; Meyer, C A; Micherdzinska, A.M.; Mokeev, V; Moreno, B; Moutarde, H; Munevar, E; Nadel-Turonski, P; Ni, A; Niccolai, S; Niculescu, G; Niculescu, I; Osipenko, M; Ostrovidov, A I; Paolone, M; Pappalardo, L; Paremuzyan, R; Park, K; Park, S; Pasyuk, E; Anefalos Pereira, S; Phelps, E; Pisano, S; Pogorelko, O; Pozdniakov, S; Price, J W; Procureur, S; Prok, Y; Protopopescu, D; Raue, B A; Ricco, G; Rimal, D; Ripani, M; Rosner, G; Sabatio, F; Saini, M S; Salgado, C; Schott, D; Schumacher, R A; Seder, E; Seraydaryan, H; Sharabian, Y G; Smith, G D; Sober, D I; Stepanyan, S S; Stepanyan, S; Stoler, P; Strakovsky, I; Strauch, S; Taiuti, M; Tang, W; Taylor, C E; Tkachenko, S; Ungaro, M; Voskanyan, H; Voutier, E; Watts, D; Weinstein, L B; Weygand, D P; Wood, M H; Zana, L; Zhang, J; Zhao, B; Zhao, Z W

2011-10-25T23:59:59.000Z

345

Plasma etching of cavities into diamond anvils for experiments at high pressures and high temperatures  

Science Conference Proceedings (OSTI)

We describe a method for precisely etching small cavities into the culets of diamond anvils for the purpose of providing thermal insulation for samples in experiments at high pressures and high temperatures. The cavities were fabricated using highly directional oxygen plasma to reactively etch into the diamond surface. The lateral extent of the etch was precisely controlled to micron accuracy by etching the diamond through a lithographically fabricated tungsten mask. The performance of the etched cavities in high-temperature experiments in which the samples were either laser heated or electrically heated is discussed.

Weir, S.T.; Cynn, H.; Falabella, S.; Evans, W.J.; Aracne-Ruddle, C.; Farber, D.; Vohra, Y.K. (LLNL); (UAB)

2012-10-23T23:59:59.000Z

346

Precision Determination of Atmospheric Extinction at Optical and Near IR Wavelengths  

SciTech Connect

The science goals for future ground-based all-sky surveys, such as the Dark Energy Survey, PanSTARRS, and the Large Synoptic Survey Telescope, require calibration of broadband photometry that is stable in time and uniform over the sky to precisions of a per cent or better, and absolute calibration of color measurements that are similarly accurate. This performance will need to be achieved with measurements made from multiple images taken over the course of many years, and these surveys will observe in less than ideal conditions. This paper describes a technique to implement a new strategy to directly measure variations of atmospheric transmittance at optical wavelengths and application of these measurements to calibration of ground-based observations. This strategy makes use of measurements of the spectra of a small catalog of bright 'probe' stars as they progress across the sky and back-light the atmosphere. The signatures of optical absorption by different atmospheric constituents are recognized in these spectra by their characteristic dependences on wavelength and airmass. State-of-the-art models of atmospheric radiation transport and modern codes are used to accurately compute atmospheric extinction over a wide range of observing conditions. We present results of an observing campaign that demonstrate that correction for extinction due to molecular constituents and aerosols can be done with precisions of a few millimagnitudes with this technique.

Burke, David L.; /SLAC; Axelrod, T.; /Arizona U., Astron. Dept. - Steward Observ.; Blondin, Stephane; /European Southern Observ. /Marseille, CPPM; Claver, Chuck; /NOAO, Tucson; Ivezic, Zeljko; Jones, Lynne; /Washington U., Seattle, Astron. Dept.; Saha, Abhijit; /NOAO, Tucson; Smith, Allyn; /Austin Peay State U.; Smith, R.Chris; /Cerro-Tololo InterAmerican Obs.; Stubbs, Christopher W.; /Harvard-Smithsonian Ctr. Astrophys.

2011-08-24T23:59:59.000Z

347

Soil chemical sensor and precision agricultural chemical delivery system and method  

DOE Patents (OSTI)

A real time soil chemical sensor and precision agricultural chemical delivery system includes a plurality of ground-engaging tools in association with individual soil sensors which measure soil chemical levels. The system includes the addition of a solvent which rapidly saturates the soil/tool interface to form a conductive solution of chemicals leached from the soil. A multivalent electrode, positioned within a multivalent frame of the ground-engaging tool, applies a voltage or impresses a current between the electrode and the tool frame. A real-time soil chemical sensor and controller senses the electrochemical reaction resulting from the application of the voltage or current to the leachate, measures it by resistivity methods, and compares it against pre-set resistivity levels for substances leached by the solvent. Still greater precision is obtained by calibrating for the secondary current impressed through solvent-less soil. The appropriate concentration is then found and the servo-controlled delivery system applies the appropriate amount of fertilizer or agricultural chemicals substantially in the location from which the soil measurement was taken.

Colburn, Jr., John W. (Houston, TX)

1991-01-01T23:59:59.000Z

348

Soil chemical sensor and precision agricultural chemical delivery system and method  

DOE Patents (OSTI)

A real time soil chemical sensor and precision agricultural chemical delivery system includes a plurality of ground-engaging tools in association with individual soil sensors which measure soil chemical levels. The system includes the addition of a solvent which rapidly saturates the soil/tool interface to form a conductive solution of chemicals leached from the soil. A multivalent electrode, positioned within a multivalent frame of the ground-engaging tool, applies a voltage or impresses a current between the electrode and the tool frame. A real-time soil chemical sensor and controller senses the electrochemical reaction resulting from the application of the voltage or current to the leachate, measures it by resistivity methods, and compares it against pre-set resistivity levels for substances leached by the solvent. Still greater precision is obtained by calibrating for the secondary current impressed through solvent-less soil. The appropriate concentration is then found and the servo-controlled delivery system applies the appropriate amount of fertilizer or agricultural chemicals substantially in the location from which the soil measurement was taken. 5 figures.

Colburn, J.W. Jr.

1991-07-23T23:59:59.000Z

349

Precision Measurement of the Decay Rate of 7Be in Host Materials  

E-Print Network (OSTI)

A controlled and precise determination of the cross-sections of the fusion reactions 7Be(p,gamma)8B and 3He(4He,gamma)7Be, which play an important role in determining the solar neutrino flux, necessitates the knowledge of a precise value of the electron-capture half-life of 7Be. This half-life may depend on the material hosting the 7Be atoms via small modifications of the electron density around the 7Be nucleus. In this brief communication we report on the measurement of 7Be implanted in four materials: copper, aluminum, sapphire and PVC. The four results are consistent with a null host dependence within two standard deviations and their weighted average of 53.236(39)d agrees very well with the adopted value in the literature, 53.22(6)d. The present results may exhibit a slight (0.22%) increase of the half-life at room temperature for metals compared to insulators that requires further studies.

Y. Nir-El; G. Haquin; Z. Yungreiss; M. Hass; G. Goldring; S. K. Chamoli; B. S. Nara Singh; S. Lakshmi; U. Koester; N. Champault; A. Dorsival; G. Georgiev; V. N. Fedoseyev; B. A. Marsh; D. Schumann; G. Heidenreich; S. Teichmann

2006-12-03T23:59:59.000Z

350

The use of alternative forms of graphical analysis to balance bias and precision in PET images  

SciTech Connect

Graphical analysis (GA) is an efficient method for estimating total tissue distribution volume (V{sub T}) from positron emission tomography (PET) uptake data. The original GA produces a negative bias in V{sub T} in the presence of noise. Estimates of V{sub T} using other GA forms have less bias but less precision. Here, we show how the bias terms are related between the GA methods and how using an instrumental variable (IV) can also reduce bias. Results are based on simulations of a two-compartment model with V{sub T}'s ranging from 10.5 to 64 mL/cm{sub 3} and from PET image data with the tracer [{sup 11}C]DASB ([{sup 11}C]-3-amino-4-(2-dimethylaminomethyl-phenylsulfanyl) benzonitrile). Four estimates of V{sub T} (or distribution volume ratio (DVR) using a reference tissue) can be easily computed from different formulations of GA including the IV. As noise affects the estimates from all four differently, they generally do not provide the same estimates. By taking the median value of the four estimates, we can decrease the bias and reduce the effect of large values contributing to noisy images. The variance of the four estimates can serve as a guide to the reliability of the median estimate. This may provide a general method for the generation of parametric images with little bias and good precision.

Logan, J.; Logan, J.; Alexoff, D.; Fowler, J.S.

2010-09-01T23:59:59.000Z

351

Annular precision linear shaped charge flight termination system for the ODES program  

SciTech Connect

The work for the development of an Annular Precision Linear Shaped Charge (APLSC) Flight Termination System (FTS) for the Operation and Deployment Experiment Simulator (ODES) program is discussed and presented in this report. The Precision Linear Shaped Charge (PLSC) concept was recently developed at Sandia. The APLSC component is designed to produce a copper jet to cut four inch diameter holes in each of two spherical tanks, one containing fuel and the other an oxidizer that are hyperbolic when mixed, to terminate the ODES vehicle flight if necessary. The FTS includes two detonators, six Mild Detonating Fuse (MDF) transfer lines, a detonator block, detonation transfer manifold, and the APLSC component. PLSCs have previously been designed in ring components where the jet penetrating axis is either directly away or toward the center of the ring assembly. Typically, these PLSC components are designed to cut metal cylinders from the outside inward or from the inside outward. The ODES program requires an annular linear shaped charge. The (Linear Shaped Charge Analysis) LESCA code was used to design this 65 grain/foot APLSC and data comparing the analytically predicted to experimental data are presented. Jet penetration data are presented to assess the maximum depth and reproducibility of the penetration. Data are presented for full scale tests, including all FTS components, and conducted with nominal 19 inch diameter, spherical tanks.

Vigil, M.G.; Marchi, D.L.

1994-06-01T23:59:59.000Z

352

Optical Science and Engineering Program Center for High Technology Materials  

E-Print Network (OSTI)

for high-precision tests of fundamental physical laws, modern communication and imaging systems.89% 44.19% Data Source:Data Compiled from extract from old IBM system (pre-2006) and Banner (2006

New Mexico, University of

353

Development and optimization of high-throughput zebrafish screening platform  

E-Print Network (OSTI)

The high-throughput zebrafish screening platform is a revolutionary tool that enables subcellular precision in vivo whole animal screening of Danio Rerio. It can perform laser surgery and/or imaging in less than twenty ...

Koo, Bryan Kyo

2010-01-01T23:59:59.000Z

354

Elements for the design of precision machine tools and their application to a prototype 450mm Si-wafer grinder  

E-Print Network (OSTI)

Next generation precision machines will require ever more rigid elements to achieve the required machining tolerances. The presented work focuses on the application of ultra stiff servo-controllable kinematic couplings and ...

Rothenhöfer, Gerald S. (Gerald Sven)

2010-01-01T23:59:59.000Z

355

A New Look at Calibration and Use of Eppley Precision Infrared Radiometers. Part I: Theory and Application  

Science Conference Proceedings (OSTI)

The calibration and accuracy of the Eppley precision infrared radiometer (PIR) is examined both theoretically and experimentally. A rederivation of the fundamental energy balance of the PIR indicates that the calibration equation in common use in ...

C. W. Fairall; P. O. G. Persson; E. F. Bradley; R. E. Payne; S. P. Anderson

1998-12-01T23:59:59.000Z

356

Precise Measurement of the e(+)e(-)->pi(+)pi(-)(gamma) Cross Section with the Initial State Radiation Method at BABAR  

E-Print Network (OSTI)

A precise measurement of the cross section of the process e[superscript +]e[superscript -]??[superscript +]?[superscript -](?) from threshold to an energy of 3 GeV is obtained with the initial state radiation (ISR) method ...

Cowan, Ray Franklin

357

Precision leveling and gravity studies at the Roosevelt Hot Springs KGRA, Utah. Final report: Volume 77-9  

DOE Green Energy (OSTI)

The objective of the precision leveling and gravity surveys in the Roosevelt Hot Springs KGRA, Utah, is to provide a baseline for detecting mass reduction or movement (displacement) related to injection or withdrawal of geofluids or to changes in tectonic strain, or both of these effects. The precision leveling and gravity data obtained during the period September 1975 through October 31, 1977 are presented, and interpretations of the data are made. (MHR)

Cook, K.L.; Carter, J.A.

1978-03-01T23:59:59.000Z

358

Validation of a New Soil VOC Sampler: Precision of the Performance of the En Core Sampler to Store Low VOC Concentrations  

Science Conference Proceedings (OSTI)

Soil sampling and storage practices for volatile organic analysis must be designed to minimize loss of volatile organic compounds (VOCs) from samples. The En Core{reg_sign} sampler is designed to collect and store soil samples in a manner that minimizes loss of contaminants due to volatilization and/or biodegradation. An American Society for Testing and Materials (ASTM) standard practice, D 6418, Standard Practice for Using the Disposable En Core Sampler for Sampling and Storing Soil for Volatile Organic Analysis, describes use of the En Core sampler to collect and store a soil sample of approximately 5 grams or 25 grams for volatile organic analysis. To support the ASTM practice, four studies have been performed to evaluate the performance of the En Core sampler for storage of soil samples spiked with VOCs. The first study was conducted to evaluate the performance of the device to store soil samples spiked with VOCs at high-level concentrations of approximately 2,500 {micro}g/Kg under various conditions. This analyte concentration in the soil was selected to limit the influence of the analytical method on the data. A second study was conducted to answer questions on the performance of the En Core sampler for storage of soil samples containing low-level (TCLP), volatile organic analytes under various conditions for 14 days. The low-level performance data and TCLP analyte storage data are included in appendices to the ASTM practice, and the ASTM research report describing the high-level study is referenced in the practice. The fourth study, which is described in this report, was performed to estimate the precision of the performance of the 5-gram and 25-gram En Core samplers to store soil samples spiked with low concentrations of VOCs. This was done so that information on the precision of the performance of the devices can be added to the ASTM practice. Data generated in the precision validation study show very good precision of the performance of the En Core samplers to store soil samples spiked with low concentrations of a variety of VOCs.

Susan S. Sorini; John F. Schabron; Joseph F. Rovani

2002-06-01T23:59:59.000Z

359

Improve Industrial Temperature Measurement Precision for Cost-Effective Energy Usage  

E-Print Network (OSTI)

Temperature measurement and energy efficiencies have always been tightly interrelated. Recent years have seen substantial advancements in the ability to make industrial temperature measurements with absolute accuracy. This capability should continue to have a great impact on industrial energy efficiency. "Absolute Accuracy" is a new concept in industrial temperature measurement. Making a measurement with "Absolute Accuracy" has enormous advantages in major industrial processes from heat-transfer to combustion thermal efficiency. Absolute measurement accuracy is especially critical when one temperature measurement is to be compared to another temperature measurement or if the measurement is to be used as part of a calculation formula such as BTU usage or compensated flow. The thermocouple and the RTD sensor continue to be the workhorse sensors for industrial measurements, but the precision measurement capability of the RTD sensor is showing real value in new installations. For temperature measurements under 1,000°F, the RTD is extremely stable and repeatable in almost all measurement conditions. There have been significant advances in the ability to accurately read these sensors, particularly in industrial applications where the temperature sensor is installed in a remote location. Four-wire sensor measurement techniques can now be used for reading RTD's in industrial applications. These four-wire measurement techniques have improved the practical measurement accuracy in industrial applications to better than ±0.1°C. This is at least ten times better than any practical industrial temperature measurement accuracy made prior to 1980. These significant accuracy improvements have been matched by similar improvements in measurement stability, particularly from smart temperature transmitters. Measurement accuracy and stability improvements have allowed for similar advances in process control strategies and in precision energy use studies. Until recently, the inaccuracy of process temperature measurements have stymied implementation of sophisticated control algorithms. With the advent of precise, stable temperature measurements, a number of process control strategies can be implemented using real-time enthalpy balances for control of batch and continuous reactions. These control strategies can result in very significant improvements in both throughput and quality. Similar improvements can be made where it is important to compare an industrial temperature measurements. These comparisons are frequent in energy use studies to identify and isolate potential energy savings. This article examines the advances in remote temperature measurement techniques for the process and utility industries. It offers several examples of the significance of the on-line control techniques.

Lewis, C. W.

1999-05-01T23:59:59.000Z

360

Deep Trek High Temperature Electronics Project  

Science Conference Proceedings (OSTI)

This report summarizes technical progress achieved during the cooperative research agreement between Honeywell and U.S. Department of Energy to develop high-temperature electronics. Objects of this development included Silicon-on-Insulator (SOI) wafer process development for high temperature, supporting design tools and libraries, and high temperature integrated circuit component development including FPGA, EEPROM, high-resolution A-to-D converter, and a precision amplifier.

Bruce Ohme

2007-07-31T23:59:59.000Z

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361

Precision calculation of blackbody radiation shifts for metrology at the 18th decimal place  

E-Print Network (OSTI)

We present a theoretical method to accurately treat correlation corrections in atoms with a few valence electrons, and apply it to calculate polarizabilities and the blackbody radiation (BBR) shifts of atomic frequency standards. The method combines the relativistic many-body all-order approach that is currently used in precision calculations for monovalent atoms, with the configuration-interaction approach that is applicable to many-electron systems. Our calculated polarizabilities are used to evaluate the blackbody radiation (BBR) shifts at 300K in the ns^2 - nsnp ^3P_0 clock transitions in Al+, B+, and In+. We estimate that our calculation reduces the relative uncertainty due to BBR shift at 300K in Al+ to 4x10^{-19}.

Safronova, M S; Clark, Charles W

2011-01-01T23:59:59.000Z

362

Precise measurement of the top quark mass in the dilepton channel at D0  

E-Print Network (OSTI)

We measure the top quark mass (mt) in ppbar collisions at a center of mass energy of 1.96 TeV using dilepton ttbar->W+bW-bbar->l+nubl-nubarbbar events, where l denotes an electron, a muon, or a tau that decays leptonically. The data correspond to an integrated luminosity of 5.4 fb-1 collected with the D0 detector at the Fermilab Tevatron Collider. We obtain mt = 174.0 +- 1.8(stat) +- 2.4(syst) GeV, which is in agreement with the current world average mt = 173.3 +- 1.1 GeV. This is currently the most precise measurement of mt in the dilepton channel.

D0 Collaboration; V. M. Abazov; B. Abbott; B. S. Acharya; M. Adams; T. Adams; G. D. Alexeev; G. Alkhazov; A. Alton; G. Alverson; G. A. Alves; L. S. Ancu; M. Aoki; M. Arov; A. Askew; B. Åsman; O. Atramentov; C. Avila; J. BackusMayes; F. Badaud; L. Bagby; B. Baldin; D. V. Bandurin; S. Banerjee; E. Barberis; P. Baringer; J. Barreto; J. F. Bartlett; U. Bassler; V. Bazterra; S. Beale; A. Bean; M. Begalli; M. Begel; C. Belanger-Champagne; L. Bellantoni; S. B. Beri; G. Bernardi; R. Bernhard; I. Bertram; M. Besançon; R. Beuselinck; V. A. Bezzubov; P. C. Bhat; V. Bhatnagar; G. Blazey; S. Blessing; K. Bloom; A. Boehnlein; D. Boline; E. E. Boos; G. Borissov; T. Bose; A. Brandt; O. Brandt; R. Brock; G. Brooijmans; A. Bross; D. Brown; J. Brown; X. B. Bu; M. Buehler; V. Buescher; V. Bunichev; S. Burdin; T. H. Burnett; C. P. Buszello; B. Calpas; E. Camacho-Pérez; M. A. Carrasco-Lizarraga; B. C. K. Casey; H. Castilla-Valdez; S. Chakrabarti; D. Chakraborty; K. M. Chan; A. Chandra; G. Chen; S. Chevalier-Théry; D. K. Cho; S. W. Cho; S. Choi; B. Choudhary; S. Cihangir; D. Claes; J. Clutter; M. Cooke; W. E. Cooper; M. Corcoran; F. Couderc; M. -C. Cousinou; A. Croc; D. Cutts; A. Das; G. Davies; K. De; S. J. de Jong; E. De La Cruz-Burelo; F. Déliot; M. Demarteau; R. Demina; D. Denisov; S. P. Denisov; S. Desai; C. Deterre; K. DeVaughan; H. T. Diehl; M. Diesburg; A. Dominguez; T. Dorland; A. Dubey; L. V. Dudko; D. Duggan; A. Duperrin; S. Dutt; A. Dyshkant; M. Eads; D. Edmunds; J. Ellison; V. D. Elvira; Y. Enari; H. Evans; A. Evdokimov; V. N. Evdokimov; G. Facini; T. Ferbel; F. Fiedler; F. Filthaut; W. Fisher; H. E. Fisk; M. Fortner; H. Fox; S. Fuess; A. Garcia-Bellido; V. Gavrilov; P. Gay; W. Geng; D. Gerbaudo; C. E. Gerber; Y. Gershtein; G. Ginther; G. Golovanov; A. Goussiou; P. D. Grannis; S. Greder; H. Greenlee; Z. D. Greenwood; E. M. Gregores; G. Grenier; Ph. Gris; J. -F. Grivaz; A. Grohsjean; S. Grünendahl; M. W. Grünewald; T. Guillemin; F. Guo; G. Gutierrez; P. Gutierrez; A. Haas; S. Hagopian; J. Haley; L. Han; K. Harder; A. Harel; J. M. Hauptman; J. Hays; T. Head; T. Hebbeker; D. Hedin; H. Hegab; A. P. Heinson; U. Heintz; C. Hensel; I. Heredia-De La Cruz; K. Herner; G. Hesketh; M. D. Hildreth; R. Hirosky; T. Hoang; J. D. Hobbs; B. Hoeneisen; M. Hohlfeld; Z. Hubacek; N. Huske; V. Hynek; I. Iashvili; R. Illingworth; A. S. Ito; S. Jabeen; M. Jaffré; D. Jamin; A. Jayasinghe; R. Jesik; K. Johns; M. Johnson; D. Johnston; A. Jonckheere; P. Jonsson; J. Joshi; A. W. Jung; A. Juste; K. Kaadze; E. Kajfasz; D. Karmanov; P. A. Kasper; I. Katsanos; R. Kehoe; S. Kermiche; N. Khalatyan; A. Khanov; A. Kharchilava; Y. N. Kharzheev; D. Khatidze; M. H. Kirby; J. M. Kohli; A. V. Kozelov; J. Kraus; S. Kulikov; A. Kumar; A. Kupco; T. Kur?a; V. A. Kuzmin; J. Kvita; S. Lammers; G. Landsberg; P. Lebrun; H. S. Lee; S. W. Lee; W. M. Lee; J. Lellouch; L. Li; Q. Z. Li; S. M. Lietti; J. K. Lim; D. Lincoln; J. Linnemann; V. V. Lipaev; R. Lipton; Y. Liu; Z. Liu; A. Lobodenko; M. Lokajicek; R. Lopes de Sa; H. J. Lubatti; R. Luna-Garcia; A. L. Lyon; A. K. A. Maciel; D. Mackin; R. Madar; R. Magaña-Villalba; S. Malik; V. L. Malyshev; Y. Maravin; J. Martínez-Ortega; R. McCarthy; C. L. McGivern; M. M. Meijer; A. Melnitchouk; D. Menezes; P. G. Mercadante; M. Merkin; A. Meyer; J. Meyer; F. Miconi; N. K. Mondal; G. S. Muanza; M. Mulhearn; E. Nagy; M. Naimuddin; M. Narain; R. Nayyar; H. A. Neal; J. P. Negret; P. Neustroev; S. F. Novaes; T. Nunnemann; G. Obrant; J. Orduna; N. Osman; J. Osta; G. J. Otero y Garzón; M. Padilla; A. Pal; N. Parashar; V. Parihar; S. K. Park; J. Parsons; R. Partridge; N. Parua; A. Patwa; B. Penning; M. Perfilov; K. Peters; Y. Peters; K. Petridis; G. Petrillo; P. Pétroff; R. Piegaia; J. Piper; M. -A. Pleier; P. L. M. Podesta-Lerma; V. M. Podstavkov; P. Polozov; A. V. Popov; M. Prewitt; D. Price; N. Prokopenko; S. Protopopescu; J. Qian; A. Quadt; B. Quinn; M. S. Rangel; K. Ranjan; P. N. Ratoff; I. Razumov; P. Renkel; M. Rijssenbeek; I. Ripp-Baudot; F. Rizatdinova; M. Rominsky; A. Ross; C. Royon; P. Rubinov; R. Ruchti; G. Safronov; G. Sajot; P. Salcido; A. Sánchez-Hernández; M. P. Sanders; B. Sanghi; A. S. Santos; G. Savage; L. Sawyer; T. Scanlon; R. D. Schamberger; Y. Scheglov; H. Schellman; T. Schliephake; S. Schlobohm; C. Schwanenberger; R. Schwienhorst; J. Sekaric; H. Severini; E. Shabalina; V. Shary; A. A. Shchukin; R. K. Shivpuri; V. Simak; V. Sirotenko; P. Skubic; P. Slattery; D. Smirnov; K. J. Smith; G. R. Snow; J. Snow; S. Snyder; S. Söldner-Rembold; L. Sonnenschein; K. Soustruznik; J. Stark; V. Stolin; D. A. Stoyanova; M. Strauss; D. Strom; L. Stutte; L. Suter; P. Svoisky; M. Takahashi; A. Tanasijczuk; W. Taylor; M. Titov; V. V. Tokmenin; Y. -T. Tsai; D. Tsybychev; B. Tuchming; C. Tully; L. Uvarov; S. Uvarov; S. Uzunyan; R. Van Kooten; W. M. van Leeuwen; N. Varelas; E. W. Varnes

2011-05-02T23:59:59.000Z

363

Precision Study of the {eta}{sup 3}He System Using the dp{yields}{sup 3}He{eta} Reaction  

Science Conference Proceedings (OSTI)

The differential and total cross sections for the dp{yields}{sup 3}He{eta} reaction have been measured in a high precision high statistics COSY-ANKE experiment near threshold using a continuous beam energy ramp up to an excess energy Q of 11.3 MeV with essentially 100% acceptance. The kinematics allowed the mean value of Q to be determined to about 9 keV. Evidence is found for the effects of higher partial waves for Q > or approx. 4 MeV. The very rapid rise of the total cross section to its maximum value within 0.5 MeV of threshold implies a very large {eta}{sup 3}He scattering length and hence the presence of a quasibound state extremely close to threshold.

Mersmann, T.; Khoukaz, A.; Mielke, M.; Papenbrock, M.; Rausmann, T.; Taeschner, A. [Institut fuer Kernphysik, Universitaet Muenster, 48149 Muenster (Germany); Buescher, M.; Hartmann, M.; Hejny, V.; Ohm, H.; Prasuhn, D.; Rathmann, F.; Schleichert, R.; Stein, H.-J.; Stroeher, H. [Institut fuer Kernphysik, Forschungszentrum Juelich, 52425 Juelich (Germany); Chiladze, D.; Keshelashvili, I. [Institut fuer Kernphysik, Forschungszentrum Juelich, 52425 Juelich (Germany); High Energy Physics Institute, Tbilisi State University, 0186 Tbilisi (Georgia); Dymov, S.; Serdyuk, V. [Laboratory of Nuclear Problems, JINR, 141980 Dubna (Russian Federation); Kacharava, A. [High Energy Physics Institute, Tbilisi State University, 0186 Tbilisi (Georgia); Physikalisches Institut II, Universitaet Erlangen-Nuernberg, 91058 Erlangen (Germany)] (and others)

2007-06-15T23:59:59.000Z

364

Method and system using power modulation for maskless vapor deposition of spatially graded thin film and multilayer coatings with atomic-level precision and accuracy  

DOE Patents (OSTI)

A method and system for producing a film (preferably a thin film with highly uniform or highly accurate custom graded thickness) on a flat or graded substrate (such as concave or convex optics), by sweeping the substrate across a vapor deposition source operated with time-varying flux distribution. In preferred embodiments, the source is operated with time-varying power applied thereto during each sweep of the substrate to achieve the time-varying flux distribution as a function of time. A user selects a source flux modulation recipe for achieving a predetermined desired thickness profile of the deposited film. The method relies on precise modulation of the deposition flux to which a substrate is exposed to provide a desired coating thickness distribution.

Montcalm, Claude (Livermore, CA); Folta, James Allen (Livermore, CA); Tan, Swie-In (San Jose, CA); Reiss, Ira (New City, NY)

2002-07-30T23:59:59.000Z

365

Towards a Precision Measurement of Parity-Violating e-p Elastic Scattering at Low Momentum Transfer  

Science Conference Proceedings (OSTI)

The goal of the Q-weak experiment is to make a measurement of the proton's weak charge Q{sub W}{sup p} = 1 - 4 sin{sup 2}({theta}{sub W}) to an accuracy of {approx} 4%. This would represent a {approx} 0.3% determination of the weak mixing angle sin{sup 2}({theta}{sub W}) at low energy. The measurement may be used for a precision test of the Standard Model (SM) prediction on the running of sin{sup 2}({theta}{sub W}) with energy scale. The Q-weak experiment operates at Thomas Jefferson National Accelerator Facility (Jefferson Lab). The experiment determines Q{sub W}{sup p} by measuring the parity violating asymmetry in elastic electron-proton scattering at low momentum transfer Q{sup 2} = 0.026 (GeV/c){sup 2} and forward angles (?8 degrees). The anticipated size of the asymmetry, based on the SM, is about 230 parts per billion (ppb). With the proposed accuracy, the experiment may probe new physics beyond Standard Model at the TeV scale. This thesis focuses on my contributions to the experiment, including track reconstruction for momentum transfer determination of the scattering process, and the focal plane scanner, a detector I designed and built to measure the flux profile of scattered electrons on the focal plane of the Q-weak spectrometer to assist in the extrapolation of low beam current tracking results to high beam current. Preliminary results from the commissioning and the first run period of the Q-weak experiment are reported and discussed.

Jie Pan

2012-05-31T23:59:59.000Z

366

Scientists combine X-rays and microscopes for precise experiments | Argonne  

NLE Websites -- All DOE Office Websites (Extended Search)

This insulator-coated "smart tip" for synchrotron X-ray scanning tunneling microscopy confines the signal detection to a tiny region of a sample. The nanofabricated tips have been developed by an Argonne team led by Argonne nanoscientist Volker Rose to improve the sensitivity of the SXSTM technique. To view a larger version of the image, click on it. This insulator-coated "smart tip" for synchrotron X-ray scanning tunneling microscopy confines the signal detection to a tiny region of a sample. The nanofabricated tips have been developed by an Argonne team led by Argonne nanoscientist Volker Rose to improve the sensitivity of the SXSTM technique. To view a larger version of the image, click on it. This insulator-coated "smart tip" for synchrotron X-ray scanning tunneling microscopy confines the signal detection to a tiny region of a sample. The nanofabricated tips have been developed by an Argonne team led by Argonne nanoscientist Volker Rose to improve the sensitivity of the SXSTM technique. To view a larger version of the image, click on it. Scientists combine X-rays and microscopes for precise experiments

367

Precise evaluation of thermal response functions by optimized density matrix renormalization group schemes  

E-Print Network (OSTI)

This paper provides a study and discussion of earlier as well as novel more efficient schemes for the precise evaluation of finite-temperature response functions of strongly correlated quantum systems in the framework of the time-dependent density matrix renormalization group (tDMRG). The computational costs and bond dimensions as functions of time and temperature are examined for the example of the spin-1/2 XXZ Heisenberg chain in the critical XY phase and the gapped N\\'eel phase. The matrix product state purifications occurring in the algorithms are in one-to-one relation with corresponding matrix product operators. This notational simplification elucidates implications of quasi-locality on the computational costs. Based on the observation that there is considerable freedom in designing efficient tDMRG schemes for the calculation of dynamical correlators at finite temperatures, a new class of optimizable schemes, as recently suggested in arXiv:1212.3570, is explained and analyzed numerically. A specific novel near-optimal scheme that requires no additional optimization reaches maximum times that are typically increased by a factor of two, when compared against earlier approaches. These increased reachable times make many more physical applications accessible. For each of the described tDMRG schemes, one can devise a corresponding transfer matrix renormalization group (TMRG) variant.

Thomas Barthel

2013-01-10T23:59:59.000Z

368

A Precision Low-Energy Measurement of the Weak Mixing Angle in Moller Scattering  

DOE Green Energy (OSTI)

The E-158 experiment at the Stanford Linear Accelerator Center (SLAC) measures the parity-violating cross-section asymmetry in electron-electron (Moeller) scattering at low Q{sup 2}. This asymmetry, whose Standard Model prediction is roughly -150 parts per billion (ppb), is directly proportional to (1-4 sin{sup 2} {theta}{sub W}), where {theta}{sub W} is the weak mixing angle. Measuring this asymmetry to within 10% provides an important test of the Standard Model at the quantum loop level and probes for new physics at the TeV scale. The experiment employs the SLAC 50 GeV electron beam, scattering it off a liquid hydrogen target. A system of magnets and collimators is used to isolate and focus the Moeller scattering events into an integrating calorimeter. The electron beam is generated at the source using a strained, gradient-doped GaAs photocathode, which produces roughly 5 x 10{sup 11} electrons/pulse (at a beam rate of 120 Hz) with {approx} 80% longitudinal polarization. The helicity of the beam can be rapidly switched, eliminating problems associated with slow drifts. Helicity-correlations in the beam parameters (charge, position, angle and energy) are minimized at the source and corrected for using precision beam monitoring devices.

Mastromarino, P.

2005-01-26T23:59:59.000Z

369

Precise Gravitational Tests via the SEE Mission: A Proposal for Space-Based Measurements  

E-Print Network (OSTI)

The objective of a SEE mission is to support development of unification theory by carrying out sensitive gravitational tests capable of determining whether various alternative theories are compatible with nature. Gravitation is a key "missing link" in unification theory. Nearly all unification theories incorporate gravity at a fundamental level, and therefore precise measurements of gravitational forces will place important constraints on unification theories. Ground-based gravitational measurements to the accuracy required are impossible due to the many sources of noise present in the terrestrial environment. The proposed space-based Satellite Energy Exchange (SEE) mission will measure several important parameters to an accuracy between 100 and 10,000 times better than current or planned measurement capabilities. It will test for time variation of the gravitational "constant" G and for violations of the weak equivalence principle (WEP) and the inverse-square-law (ISL), and it will determine G. It is well-known that the discovery of breakdowns in WEP or ISL and the possible determination of a time-varying G would have significant consequences on virtually all aspects of unification theory.

Alvin J. Sanders; George T. Gillies

2010-05-20T23:59:59.000Z

370

Reconfigurable Assembly Station for Precision Manufacture of Nuclear Fusion Ignition Targets  

SciTech Connect

This paper explores the design and testing of a reconfigurable assembly station developed for assembling the inertial confinement nuclear fusion ignition targets that will be fielded in the National Ignition Facility (NIF) laser [1]. The assembly station, referred to as the Flexible Final Assembly Machine (FlexFAM) and shown in Figure 1, is a companion system to the earlier Final Assembly Machine (FAM) [2]. Both machines consist of a manipulator system integrated with an optical coordinate measuring machine (OCMM). The manipulator system has six groups of stacked axis used to manipulate the millimeter-sized target components with submicron precision, and utilizes the same force and torque feedback sensing as the FAM. Real-time dimensional metrology is provided by the OCMM's vision system and through-the-lens (TTL) laser-based height measuring probe. The manually actuated manipulator system of the FlexFAM provides a total of thirty degrees-of-freedom to the target components being assembled predominantly in a cubic centimeter work zone.

Castro, C; Montesanti, R C; Taylor, J S; Hamza, A V; Dzenitis, E G

2009-08-11T23:59:59.000Z

371

A Precision Measurement of the W Boson Mass with 1 Inverse Femtobarn of DZero Run IIa Data  

SciTech Connect

This thesis is a detailed presentation of a precision measurement of the mass of the W boson. It has been obtained by analyzing W {yields} e{nu} decays. The data used for this analysis was collected from 2002 to 2006 with the D0 detector, during Run IIa of the Fermilab Tevatron collider. It corresponds to a total integrated luminosity of 1 fb{sup -1}. With a sample of 499,830 W {yields} e{nu} candidate events, we obtain a mass measurement of M{sub W} = 80.401 {+-} 0.043 GeV. This is the most precise measurement from a single experiment to date.

Osta, Jyotsna; /Notre Dame U.

2009-10-01T23:59:59.000Z

372

Locating TeV Gamma-Ray Sources with Sub-Arcminute Precision: the Pointing Calibration of the HEGRA System of Imaging Atmospheric Cherenkov Telescopes  

E-Print Network (OSTI)

Stereoscopic viewing of TeV gamma-ray air showers with systems of Imaging Atmospheric Cherenkov Telescopes (IACTs) allows to reconstruct the origin of individual primary particles with an accuracy of 0.1 degree or better. The shower impact point can be determined within 15 meters. To actually achieve this resolution, the pointing of the telescopes of an IACT system needs to be controlled with high precision. For the HEGRA IACT system, a procedure to calibrate telescope pointing was established, using bright stars distributed over the sky as references. On the basis of these measurements, one determines parameters of a correction function which is valid for the complete hemisphere. After correction a pointing accuracy of 0.01 degree is achieved.

G. Puehlhofer; A. Daum; G. Hermann; M. Hess; W. Hofmann; C. Koehler; M. Panter

1998-01-12T23:59:59.000Z

373

A ZigBee multi-powered wireless acquisition device for remote sensing applications in precision viticulture  

Science Conference Proceedings (OSTI)

This paper is part of a long-term effort to introduce precision viticulture in the region of Demarcated Region of Douro. It presents the architecture, hardware and software of a platform designed for that purpose, called MPWiNodeZ. A major feature of ... Keywords: Acquisition device, Energy harvesting, Remote sensing, Viticulture, Wireless sensor network, ZigBee

Raul Morais; Miguel A. Fernandes; Samuel G. Matos; Carlos Serôdio; P. J. S. G. Ferreira; M. J. C. S. Reis

2008-07-01T23:59:59.000Z

374

CALCULATIONS OF SHAPE CHANGE AND FRAGMENTATION PARAMETERS USING VERY PRECISE BOLIDE DATA.  

SciTech Connect

Using the theoretical formalism of ReVelle (2001d), we have analyzed 22 European (EN) and US Prairie Network fireballs (PN) with the most precise trajectory information available for shape change and fragmentation effects. For 14 bolides the shape change parameter, {mu}, was always > 0 and for the other 8 cases there were instances of {mu} < 0, but with large oscillations in its sign with height or time. When the shape change parameter, {mu}, was < 0, the fragmentation scale height was > 0 and in a few instances was briefly even smaller than the pressure scale height. This is the necessary condition in addition to the sufficient condition of {mu} < 0 for the onset of the catastrophic fragmentation process ('pancake' break-up). A histogram of all computed {mu} values indicates that an average value was <{mu} > {approx} 0.10, indicating that substantial shape change has taken place during entry for these bolides. This is fully consistent with the recent analyses of ReVelle and Ceplecha (2001g) of the changes in the shape-density coefficient, K, with time as well. Thus, the use of the {mu} = 2/3 (self-similar solution with no shape change) is not recommended for bolide modeling efforts. From our results we can conclude that most of the US DoD bolides can be successfully modeled using single-body theory without resorting to the 'pancake' catastrophic fragmentation model that was 'rediscovered' in the early 1990's by a number of workers. These researchers included Hills and Goda, Chyba, Thomas and Zahnle, etc. who specifically developed this break-up model for studying he impact into Jupiter of the huge Shoemaker Levy-9 comet.

ReVelle, D. O. (Douglas O.); Ceplecha, Zden?k

2001-01-01T23:59:59.000Z

375

Flavor Physics in the Randall-Sundrum Model: I. Theoretical Setup and Electroweak Precision Tests  

E-Print Network (OSTI)

A complete discussion of tree-level flavor-changing effects in the Randall-Sundrum (RS) model with brane-localized Higgs sector and bulk gauge and matter fields is presented. The bulk equations of motion for the gauge and fermion fields, supplemented by boundary conditions taking into account the couplings to the Higgs sector, are solved exactly. For gauge fields the Kaluza-Klein (KK) decomposition is performed in a covariant R_xi gauge. For fermions the mixing between different generations is included in a completely general way. The hierarchies observed in the fermion spectrum and the quark mixing matrix are explained naturally in terms of anarchic five-dimensional Yukawa matrices and wave-function overlap integrals. Detailed studies of the flavor-changing couplings of the Higgs boson and of gauge bosons and their KK excitations are performed, including in particular the couplings of the standard W and Z bosons. A careful analysis of electroweak precision observables including the S and T parameters and the Zbb couplings shows that the simplest RS model containing only Standard Model particles and their KK excitations is consistent with all experimental bounds for a KK scale as low as a few TeV, if one allows for a heavy Higgs boson and/or for an ultra-violet cutoff below the Planck scale. The study of flavor-changing effects includes analyses of the non-unitarity of the quark mixing matrix, anomalous right-handed couplings of the W bosons, tree-level flavor-changing neutral current couplings of the Z and Higgs bosons, the rare decays t-->c(u)+Z and t-->c(u)+h, and the flavor mixing among KK fermions. The results obtained in this work form the basis for general calculations of flavor-changing processes in the RS model and its extensions.

S. Casagrande; F. Goertz; U. Haisch; M. Neubert; T. Pfoh

2008-07-31T23:59:59.000Z

376

Ultra-Precise Assembly of Micro-Electromechanical Systems (MEMS) Components  

SciTech Connect

This report summarizes a three year effort to develop an automated microassembly workcell for the assembly of LIGA (Lithography Galvonoforming Abforming) parts. Over the last several years, Sandia has developed processes for producing surface machined silicon and LIGA parts for use in weapons surety devices. Some of these parts have outside dimensions as small as 100 micron, and most all have submicron tolerances. Parts this small and precise are extremely difficult to assembly by hand. Therefore, in this project, we investigated the technologies required to develop a robotic workcell to assembly these parts. In particular, we concentrated on micro-grippers, visual servoing, micro-assembly planning, and parallel assembly. Three different micro-grippers were tested: a pneumatic probe, a thermally actuated polysilicon tweezer, and a LIGA fabricated tweezer. Visual servoing was used to accuracy position two parts relative to one another. Fourier optics methods were used to generate synthetic microscope images from CAD drawings. These synthetic images are used off-line to test image processing routines under varying magnifications and depths of field. They also provide reference image features which are used to visually servo the part to the desired position. We also investigated a new aspect of fine motion planning for the micro-domain. As parts approach 1-10 {micro}m or less in outside dimensions, interactive forces such as van der Waals and electrostatic forces become major factors which greatly change the assembly sequence and path plans. We developed the mathematics required to determine the goal regions for pick up, holding, and release of a micro-sphere being handled by a rectangular tool. Finally, we implemented and tested the ability to assemble an array of LIGA parts attached to two 3 inch diameter wafers. In this way, hundreds of parts can be assembled in parallel rather than assembling each part individually.

Feddema, J.T.; Simon, R.; Polosky, M.; Christenson, T.

1999-04-01T23:59:59.000Z

377

Composition, microstructure, hardness, and wear properties of high-speed steel rolls  

SciTech Connect

The effects of alloying elements on the microstructural factors, hardness, and wear properties of four high-speed steel (HSS) rolls fabricated by centrifugal casting were investigated. A hot-rolling simulation test was carried out using a high-temperature wear tester capable of controlling speed, load, and temperature. The test results revealed that the HSS roll containing a larger amount of vanadium showed the best wear resistance because it contained a number of hard MC-type carbides. However, it showed a very rough roll surface because of cracking along cell boundaries, the preferential removal of the matrix, and the sticking of the rolled material onto the roll surface during the wear process, thereby leading to an increase in the friction coefficient and rolling force. In order to improve wear resistance with consideration to surface roughness, it is suggested that a reduction in the vanadium content, an increase in solid-solution hardening by adding alloying elements, an increase in secondary hardening by precipitation of fine carbides in the matrix, and formation of refined prior austenite grains by preaustenitization treatment be employed to strengthen the matrix, which can hold hard carbides in it.

Park, J.W.; Lee, H.C. [Kangwon Industries, Ltd., Pohang (Korea, Republic of). Roll Mfg. Div.; Lee, S. [Pohang Univ. of Science and Technology (Korea, Republic of). Center for Advanced Aerospace Materials

1999-02-01T23:59:59.000Z

378

Superallowed 0{sup +}{yields}0{sup +} nuclear {beta} decays: A new survey with precision tests of the conserved vector current hypothesis and the standard model  

Science Conference Proceedings (OSTI)

A new critical survey is presented of all half-life, decay-energy, and branching-ratio measurements related to 20 superallowed 0{sup +}{yields}0{sup +}{beta} decays. Compared with our last review, there are numerous improvements: First, we have added 27 recently published measurements and eliminated 9 references, either because they have been superseded by much more precise modern results or because there are now reasons to consider them fatally flawed; of particular importance, the new data include a number of high-precision Penning-trap measurements of decay energies. Second, we have used the recently improved isospin symmetry-breaking corrections, which were motivated by these new Penning-trap results. Third, our calculation of the statistical rate function f now accounts for possible excitation in the daughter atom, a small effect but one that merits inclusion at the present level of experimental precision. Finally, we have re-examined the systematic uncertainty associated with the isospin symmetry-breaking corrections by evaluating the radial-overlap correction using Hartree-Fock radial wave functions and comparing the results with our earlier calculations, which used Saxon-Woods wave functions; the provision for systematic uncertainty has been changed as a consequence. The new ''corrected''Ft values are impressively constant and their average, when combined with the muon lifetime, yields the up-down quark-mixing element of the Cabibbo-Kobayashi-Maskawa (CKM) matrix, V{sub ud}=0.97425{+-}0.00022. The unitarity test on the top row of the matrix becomes |V{sub ud}|{sup 2}+|V{sub us}|{sup 2}+|V{sub ub}|{sup 2}=0.99995{+-}0.00061. Both V{sub ud} and the unitarity sum have significantly reduced uncertainties compared with our previous survey, although the new value of V{sub ud} is statistically consistent with the old one. From these data we also set limits on the possible existence of scalar interactions, right-hand currents, and extra Z bosons. Finally, we discuss the priorities for future theoretical and experimental work with the goal of making the CKM unitarity test even more definitive.

Hardy, J. C.; Towner, I. S. [Cyclotron Institute, Texas A and M University, College Station, Texas 77843 (United States)

2009-05-15T23:59:59.000Z

379

Application of Precision Mechanical Engineering Techniques to the Design of a Moderate Energy Beam Transport for the FAA Explosive Detection System  

E-Print Network (OSTI)

Application of Precision Mechanical Engineering Techniques to the Design of a Moderate Energy Beam Transport for the FAA Explosive Detection System

Lujan, R

1993-01-01T23:59:59.000Z

380

Producing microchannels using graduated diffusion bonding of a stack of precision machined foils or sheets (laminates) to make a micro-channel reactor  

This patented invention is a method for producing microchannels using graduated diffusion bonding of a stack of precision machined foils or sheets ...

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381

A Precision Agriculture Approach to Managing Cotton Fiber Quality as a Function of Variable Soil Properties  

E-Print Network (OSTI)

Cotton producers can maximize yield and fiber quality by understanding soil variability throughout the fields, thus receiving premium prices for the cotton lint. A better understanding of how soil water holding capacity affects cotton lint yield and quality can result in improved management practices that can maximize fiber quality while minimizing inputs. The objectives of this study were to 1) create management zones using a soil ECa map, 2) test the usefulness of this map using measurements of lint quality and lint quantity in both irrigated and dryland fields, and 3) determine a relationship between soil water holding capacity fiber quality parameters. The selected site was Texas A&M University s IMPACT center which is located nine miles west of College Station, TX in the Brazos River floodplain. In the 2006 and 2007 growing seasons, 24 measurement locations were selected in a dryland and irrigated cotton field, 12 locations in each field. The sites were selected using a map of soil ECa, three ECa categories and four replications. At each location soil texture, soil water holding capacity, and lint quality (HVI) and quantity were measured. The ECa categories successfully identified significant differences in clay content water holding capacity, lint yield, lint quality, and loan values. The 2006 season was relatively dry. Weather, soil variability, and management affected the yield and yield quality responses. Water availability was not a factor for lint yield or quality in 2007. In this situation, the soil was the primary factor for field heterogeneity. The cotton yield still responded to soil variability but lint quality and loan value was uniform. The uniformity of lint quality and non-uniformity of lint quantity leads to the conclusion that these soils have individual yield thresholds, but without water stress the quality threshold is uniform. This conclusion illuminates opportunities for precision management strategies. One management strategy that may result from this work is to reduce seeding rates in lower production areas of the field, if the plants will compensate for yield to still reach the soils yield potential, perhaps less competition for water would improve lint quality.

Stanislav, Scott

2011-08-04T23:59:59.000Z

382

Improved efficiency and precise temperature control of low-frequency induction-heating pure iron vapor source on ECR ion source  

SciTech Connect

Multiply charged ions to be used prospectively are produced from solid pure material in an electron cyclotron resonance ion source (ECRIS). Recently a pure iron source is also required for the production of caged iron ions in the fullerene in order to control cells in vivo in bio-nano science and technology. We adopt directly heating iron rod by induction heating (IH) because it has non-contact with insulated materials which are impurity gas sources. We choose molybdenum wire for the IH coils because it doesn't need water cooling. To improve power efficiency and temperature control, we propose to the new circuit without previously using the serial and parallel dummy coils (SPD) for matching and safety. We made the circuit consisted of inductively coupled coils which are thin-flat and helix shape, and which insulates the IH power source from the evaporator. This coupling coils circuit, i.e. insulated induction heating coil transformer (IHCT), can be move mechanically. The secondary current can be adjusted precisely and continuously. Heating efficiency by using the IHCT is much higher than those of previous experiments by using the SPD, because leakage flux is decreased and matching is improved simultaneously. We are able to adjust the temperature in heating the vapor source around melting point. And then the vapor pressure can be controlled precisely by using the IHCT. We can control {+-}10K around 1500 Degree-Sign C by this method, and also recognize to controlling iron vapor flux experimentally in the extreme low pressures. Now we come into next stage of developing induction heating vapor source for materials with furthermore high temperature melting points above 2000K with the IHCT, and then apply it in our ECRIS.

Kato, Y.; Takenaka, T.; Yano, K.; Kiriyama, R.; Kurisu, Y.; Nozaki, D.; Muramatsu, M.; Kitagawa, A.; Uchida, T.; Yoshida, Y.; Sato, F.; Iida, T. [Osaka Univ., 2-1 Yamadaoka, Suita, Osaka, 565-0871 (Japan); National Institute of Radiological Science (NIRS), 4-9-1 Anagawa, Inage, Chiba, 263-8555 (Japan); Bio-Nano Electronics Research Centre, Toyo Univ., 2100 Kuzirai, Kawagoe, Saitama, 350-8585 (Japan); Osaka Univ., 2-1 Yamadaoka, Suita, Osaka, 565-0871 (Japan)

2012-11-06T23:59:59.000Z

383

PermaDAQ: A scientific instrument for precision sensing and data recovery in environmental extremes  

Science Conference Proceedings (OSTI)

The PermaSense project has set the ambitious goal of gathering real-time environmental data for high-mountain permafrost in unattended operation over multiple years. This paper discusses the specialized sensing and data recovery architecture tailored ...

Jan Beutel; Stephan Gruber; Andreas Hasler; Roman Lim; Andreas Meier; Christian Plessl; Igor Talzi; Lothar Thiele; Christian Tschudin; Matthias Woehrle; Mustafa Yuecel

2009-04-01T23:59:59.000Z

384

Dynamic tailoring and tuning for space-based precision optical structures  

E-Print Network (OSTI)

Next-generation space telescopes in NASA's Origins missions require use of advanced imaging techniques to achieve high optical performance with limited launch mass. Structurally-connected Michelson interferometers meet ...

Masterson, Rebecca A. (Rebecca Ann)

2005-01-01T23:59:59.000Z

385

Assessment of precise surface-gravity measurements for monitoring the response of a geothermal reservoir to exploitation  

Science Conference Proceedings (OSTI)

Recommendations for carrying out surveys which achieve 15, 10 and 5 microgal precisions are presented. Achieving the smaller standard deviations will require more field effort and will be more costly. For a 60 station survey, at commercial rates in 1981, typical costs are estimated to be $20,000, $26,000 and $35,000 respectively, for data collection, reduction and interpretation. These figures exclude instrument purchase or rental. Twenty geothermal areas in the western United States which might be suitable for precise repetitive gravity monitoring were evaluated. The evaluation criteria included capability for subsidence on a geological basis, estimated electrical production, environmental impact, and anticipation of production in the near future. It is felt that the most promising areas in order of priority are: (1) the Salton Sea field, California; (2) Valles Caldera, New Mexico; (3) The Geysers-Clear Lake; and (4) Westmorland, California; (5) Roosevelt Hot Springs, Utah; and (6) Heber; (7) Brawley; and (8) Long Valley, California.

Grannell, R.B.; Whitcomb, J.H.; Aronstam, P.S.; Clover, R.C.

1981-06-01T23:59:59.000Z

386

New Precision Mass Measurements of Neutron-Rich Calcium and Potassium Isotopes and Three-Nucleon Forces  

Science Conference Proceedings (OSTI)

We present precision Penning trap mass measurements of neutron-rich calcium and potassium isotopes in the vicinity of neutron number N=32. Using the TITAN system, the mass of 51K was measured for the first time, and the precision of the 51,52Ca mass values were improved significantly. The new mass values show a dramatic increase of the binding energy compared to those reported in the atomic mass evaluation. In particular, 52Ca is more bound by 1.74 MeV, and the behavior with neutron number deviates substantially from the tabulated values. An increased binding was predicted recently based on calculations that include three-nucleon (3N) forces. We present a comparison to improved calculations, which agree remarkably with the evolution of masses with neutron number, making neutron-rich calcium isotopes an exciting region to probe 3N forces.

Gallant, A. T. [TRIUMF, University of British Columbia; Bale, J. C. [TRIUMF, University of British Columbia/Simon Fraser University-Canada; Brunner, T. [TRIUMF, University of British Columbia; Chowdhury, U. [TRIUMF, University of British Columbia/ University of Manitoba-Canada; Ettenauer, S. [TRIUMF, University of British Columbia; Lennarz, A. [TRIUMF, University of British Columbia/Westfälische Wilhelms-Universität-Germany; Robertson, D. [TRIUMF, University of British Columbia; Simon, V. V. [TRIUMF-Canada/Ruprecht-Karls-Universität Heidelberg/Max-Planck-Inst.-Heidelberg, Germany; Chaudhuri, A. [TRIUMF, University of British Columbia; Holt, J. D. [UTK/ORNL; Kwiatkowski, A. A. [TRIUMF, University of British Columbia; Mané, E. [TRIUMF, University of British Columbia; Menéndez, J. [Inst. für Kernphysik, Tech. Univ. Darmstadt-Germany/ExtreMe Matter Inst., GSI-Darmstadt; Schultz, B. E. [TRIUMF, University of British Columbia; Simon, M. C. [TRIUMF, University of British Columbia; Andreoiu, C. [Simon Fraser University, Canada; Delheij, P. [TRIUMF, University of British Columbia; Pearson, M. [TRIUMF, University of British Columbia; Savajols, H. [GANIL, Caen cedex, France; Schwenk, A. [Inst. für Kernphysik, Tech. Univ. Darmstadt-Germany/ExtreMe Matter Inst., GSI-Darmstadt; Dilling, J. [TRIUMF, University of British Columbia

2012-01-01T23:59:59.000Z

387

Laboratory Directed Research and Development Final Report Intelligent Tools for On-Machine Acceptance of Precision Machined Components  

E-Print Network (OSTI)

On-Machine Acceptance (OMA) is an agile manufacturing concept being developed for machine tools at SNL. The concept behind OMA is the integration of product design, fabrication, and qualification processes by using the machining center as a fabrication and inspection tool. This report documents the final results of a Laboratory Directed Research and Development effort to qualify OMA. Intelligent Tools for On-Machine Acceptance of Precision Machined Components 2 Acknowledgments Thanks to Don Sheaffer, Department 8120, Mark Powell, Department 9611, and Marcey Abate, Department 12323, for their contributions to this final report. Thanks to Tony Bryce, and Dennis Clingan, Department 1484, Phil Skogmo, Department 2645, and Charles Steinhaus, Department 8240, for their assistance in writing this report. Intelligent Tools for On-Machine Acceptance of Precision Machined Components 3 Contents 1.0 Introduction .................................................................................

Naomi Christensen Precision; Naomi G. Christensen; Lane D. Harwell; Andrew Hazelton

1996-01-01T23:59:59.000Z

388

Double Precision Computation of the Logistic Map Depends on Computational Modes of the Floating-point Processing Unit  

E-Print Network (OSTI)

Today's most popular CPU can operate in two different computational modes for double precision computations. This fact is not very widely recognized among scientific computer users. The present paper reports the differences the modes bring about using the most thoroughly studied system in chaos theory, the logistic map. Distinct virtual periods due to finite precision come about depending on the computational modes for the parameter value corresponding to fully developed chaos. For other chaotic regime various virtual periods emerge depending on the computational modes and the mathematical expressions of the map. Differences in the bifurcation diagrams due to the modes and the expressions are surveyed exhaustively. A quantity to measure those differences is defined and calculated.

Michiro Yabuki; Takashi Tsuchiya

2013-05-14T23:59:59.000Z

389

FY07 LDRD Final Report Precision, Split Beam, Chirped-Pulse, Seed Laser Technology  

Science Conference Proceedings (OSTI)

The goal of this LDRD ER was to develop a robust and reliable technology to seed high-energy laser systems with chirped pulses that can be amplified to kilo-Joule energies and recompressed to sub-picosecond pulse widths creating extremely high peak powers suitable for petawatt class physics experiments. This LDRD project focused on the development of optical fiber laser technologies compatible with the current long pulse National Ignition Facility (NIF) seed laser. New technologies developed under this project include, high stability mode-locked fiber lasers, fiber based techniques for reduction of compressed pulse pedestals and prepulses, new compact stretchers based on chirped fiber Bragg gratings (CFBGs), new techniques for manipulation of chirped pulses prior to amplification and new high-energy fiber amplifiers. This project was highly successful and met virtually all of its goals. The National Ignition Campaign has found the results of this work to be very helpful. The LDRD developed system is being employed in experiments to engineer the Advanced Radiographic Capability (ARC) front end and the fully engineered version of the ARC Front End will employ much of the technology and techniques developed here.

Dawson, J W; Messerly, M J; Phan, H H; Crane, J K; Beach, R J; Siders, C W; Barty, C J

2009-11-12T23:59:59.000Z

390

A High-Rate, Heterogeneous Data Set from the Darpa Urban Challenge  

E-Print Network (OSTI)

This paper describes a data set collected by MIT’s autonomous vehicle Talos during the 2007 DARPA Urban Challenge. Data from a high-precision navigation system, five cameras, 12 SICK planar laser range scanners, and a ...

Huang, Albert S.

391

Real-Time High Resolution Quantitative Imaging by Three Wavelength Digital Holography  

An optical system capable of reproducing three-dimensional images was invented atORNL. This system can detect height changes of a few nanometers or less and renderclear, single shot images. These types of precise, high speed measurements are ...

392

Thin optic surface analysis for high resolution X-ray telescopes  

E-Print Network (OSTI)

The art of glass developed throughout the years has covered artifacts ranging from crude ornaments to high precision optics used in flat panel displays, hard disk drives, and x-ray telescopes. Methods for manufacturing ...

Akilian, Mireille

2004-01-01T23:59:59.000Z

393

J9: Preparation of Oriented by High Magnetic Field BNBT  

Science Conference Proceedings (OSTI)

A18: Effect of Local Alendronate Delivery on In Vivo Osteogenesis From PCL ... A7: On-the-fly System Design for High Precision/Ultra Fast/Wide Area Fabrication .... C19: Dissolution Behavior of Cu Under Bump Metallization in Ball Grid Array ... High Volume and Fast Turnaround Automated Inline TEM Sample Preparation.

394

Online piece-wise linear approximation of numerical streams with precision guarantees  

Science Conference Proceedings (OSTI)

Continuous "always-on" monitoring is beneficial for a number of applications, but potentially imposes a high load in terms of communication, storage and power consumption when a large number of variables need to be monitored. We introduce two new filtering ...

Hazem Elmeleegy; Ahmed K. Elmagarmid; Emmanuel Cecchet; Walid G. Aref; Willy Zwaenepoel

2009-08-01T23:59:59.000Z

395

MRST2001: Partons and alpha(s) from precise deep inelastic scattering and Tevatron jet data.  

E-Print Network (OSTI)

data is (very roughly) ? ?S(E2T /4)g(x,ET/2), then g(x, µ2) for µ2 of order 103 GeV2 is roughly inversely proportional to ?S(M2Z). However, at high x the gluon distribution decreases more rapidly with increasing Q2, the larger the value of the coupling...

Martin, A D; Roberts, R G; Stirling, W James; Thorne, Robert S

396

An Investigation of Precision and Scaling Issues in Nuclear Spin and Trapped-Ion Quantum Simulators  

E-Print Network (OSTI)

be appreciably larger than in existing intermediate size scale experiments. As a consequence there may be a lower in intermediate size experiments. Also, there may be a turbulent "sea" of high-n modes which is not encountered in present intermediate size experiments. Another important effect of energetic alpha particles

Raizen, Mark G.

397

Precise Measurement of the Absolute Yield of Fluorescence Photons in Atmospheric Gases  

SciTech Connect

We have performed a measurement of the absolute yield of fluorescence photons at the Fermilab Test Beam. A systematic uncertainty at 5% level was achieved by the use of Cherenkov radiation as a reference calibration light source. A cross-check was performed by an independent calibration using a laser light source. A significant improvement on the energy scale uncertainty of Ultra-High Energy Cosmic Rays is expected.

Ave, M.; /Karlsruhe, Inst. Technol.; Bohacova, M.; /Chicago U., EFI; Daumiller, K.; /Karlsruhe, Inst. Technol.; Di Carlo, P.; /INFN, Aquila; Di Giulio, C.; /INFN, Rome; Luis, P.Facal San; /Chicago U., EFI; Gonzales, D.; /Karlsruhe U., EKP; Hojvat, C.; /Fermilab; Horandel, J.R.; /Nijmegen U., IMAPP; Hrabovsky, M.; /Palacky U.; Iarlori, M.; /INFN, Aquila /Karlsruhe, Inst. Technol.

2011-01-01T23:59:59.000Z

398

High School  

NLE Websites -- All DOE Office Websites (Extended Search)

High School Please click on the title for more information about each program. Nano*High Nano High Saturday presentations for Bay Area high school students Science Bowl Science...

399

A Liquid Hydrogen Target for Precision Measurement of the Weak Mixing Angle in Moller Scattering at SLAC  

DOE Green Energy (OSTI)

A 150 cm long liquid hydrogen target has been built for the SLAC End Station A E158 experiment. The target loop volume is 55 liters, and the maximum target heat load deposited by the electron beam is {approx} 700 W. The liquid hydrogen density fluctuation with full beam current (120 Hz repetition rate, 6 x 10{sup 11} electrons/spill) on target is well below 10{sup -4} level, which fulfills the requirement for a precision measurement of the weak mixing angle in the polarized electron-electron scattering process.

Weisend, John G

2002-11-07T23:59:59.000Z

400

Very Long Baseline Neutrino Oscillation Experiment for Precise Determination of Oscillation Parameters and Search for nu_mu -> nu_e Appearance and CP Violation  

E-Print Network (OSTI)

The possibility of making a low cost, very intense (1MW) high energy proton source at the Brookhaven Alternating Gradient Synchrotron (BNL-AGS) along with the forthcoming new large underground detectors (approaching 1 MT in mass) at the National Underground Science and Engineering Laboratory (NUSEL) in Homestake, South Dakota or at the Waste Isolation Pilot Plant (WIPP) in Carlsbad, New Mexico, allows us to propose a program of experiments that will address fundamental aspects of neutrino oscillations and CP-invariance violation. This program is unique because of the very long baseline of more than 2500 km from BNL to the underground laboratory in the West. We used the running scenario of a low energy, wide band neutrino beam with 1 MW AGS, 500 kT of fiducial mass water Cherenkov detector, and 5x10^7 seconds of running time. In this report we show that with these conditions we precisely measure dm^2_32 and sin^2(2theta_23) and have excellent sensitivity to sin^2(2theta_13) with a distinctive signal spectrum. If sin^2(2theta_13) > 0.01 the experiment is sensitive to the CP-violating phase in the mixing matrix with only neutrino running. By running in the anti-neutrino mode we distinguish between the cases dm^2_31 > 0 versus dm^2_31 nu_e appearance channel.

BNL Neutrino Working Group; M. Diwan

2002-10-31T23:59:59.000Z

Note: This page contains sample records for the topic "high precision tester" 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

Lithium Polarization Spectroscopy: Making Precision Plasma Current Measurements in the DIII-D National Fusion Facility  

SciTech Connect

Due to several favorable atomic properties (including a simple spectral structure, the existence of a visible resonance line, large excitation cross section, and ease of beam formation), beams of atomic lithium have been used for many years to diagnose various plasma parameters. Using techniques of active (beam-based) spectroscopy, lithium beams can provide localized measurements of plasma density, ion temperature and impurity concentration, plasma fluctuations, and intrinsic magnetic fields. In this paper we present recent results on polarization spectroscopy from the LIBEAM diagnostic, a 30 keV, multi-mA lithium beam system deployed on the DIII-D National Fusion Facility tokamak. In particular, by utilizing the Zeeman splitting and known polarization characteristics of the collisionally excited 670.8 nm Li resonance line we are able to measure accurately the spatio-temporal dependence of the edge current density, a parameter of basic importance to the stability of high performance tokamaks. We discuss the basic atomic beam performance, spectral lineshape filtering, and polarization analysis requirements that were necessary to attain such measurements. Observations made under a variety of plasma conditions have demonstrated the close relationship between the edge current and plasma pressure, as expected from neoclassical theory.

Thomas, D. M. [General Atomics, P.O. Box 85608, San Diego, California 92186-5608 (United States)

2007-08-02T23:59:59.000Z

402

Measurement of damping and temperature: Precision bounds in Gaussian dissipative channels  

Science Conference Proceedings (OSTI)

We present a comprehensive analysis of the performance of different classes of Gaussian states in the estimation of Gaussian phase-insensitive dissipative channels. In particular, we investigate the optimal estimation of the damping constant and reservoir temperature. We show that, for two-mode squeezed vacuum probe states, the quantum-limited accuracy of both parameters can be achieved simultaneously. Moreover, we show that for both parameters two-mode squeezed vacuum states are more efficient than coherent, thermal, or single-mode squeezed states. This suggests that at high-energy regimes, two-mode squeezed vacuum states are optimal within the Gaussian setup. This optimality result indicates a stronger form of compatibility for the estimation of the two parameters. Indeed, not only the minimum variance can be achieved at fixed probe states, but also the optimal state is common to both parameters. Additionally, we explore numerically the performance of non-Gaussian states for particular parameter values to find that maximally entangled states within d-dimensional cutoff subspaces (d{<=}6) perform better than any randomly sampled states with similar energy. However, we also find that states with very similar performance and energy exist with much less entanglement than the maximally entangled ones.

Monras, Alex; Illuminati, Fabrizio [Dipartimento di Matematica e Informatica, Universita degli Studi di Salerno, CNR-SPIN, Unita di Salerno, CNISM Unita di Salerno, and INFN Sezione di Napoli, Gruppo Collegato di Salerno, Via Ponte don Melillo, I-84084 Fisciano (Italy)

2011-01-15T23:59:59.000Z

403

Measurement of damping and temperature: Precision bounds in Gaussian dissipative channels  

E-Print Network (OSTI)

We present a comprehensive analysis of the performance of different classes of Gaussian states in the estimation of Gaussian phase-insensitive dissipative channels. In particular, we investigate the optimal estimation of the damping constant and reservoir temperature. We show that, for two-mode squeezed vacuum probe states, the quantum-limited accuracy of both parameters can be achieved simultaneously. Moreover, we show that for both parameters two-mode squeezed vacuum states are more efficient than either coherent, thermal or single-mode squeezed states. This suggests that at high energy regimes two-mode squeezed vacuum states are optimal within the Gaussian setup. This optimality result indicates a stronger form of compatibility for the estimation of the two parameters. Indeed, not only the minimum variance can be achieved at fixed probe states, but also the optimal state is common to both parameters. Additionally, we explore numerically the performance of non-Gaussian states for particular parameter values to find that maximally entangled states within D-dimensional cutoff subspaces perform better than any randomly sampled states with similar energy. However, we also find that states with very similar performance and energy exist with much less entanglement than the maximally entangled ones.

A. Monras; F. Illuminati

2010-10-03T23:59:59.000Z

404

The socio-technical construction of precision bombing : a study of shared control and cognition by humans, machines, and doctrine during World War II  

E-Print Network (OSTI)

This dissertation examines the creation and initial use of the precision bombing system employed by the United States Army Air Forces during World War II in the opening phase of the Combined Bomber Offensive against Germany. ...

O'Mara, Raymond P. (Raymond Patrick)

2011-01-01T23:59:59.000Z

405

Precise measurement of the e[superscript +]e[superscript -]??[superscript +]?[superscript -](?) cross section with the initial-state radiation method at BABAR  

E-Print Network (OSTI)

A precise measurement of the cross section of the process e[superscript +]e[superscript -]??[superscript +]?[superscript -](?) from threshold to an energy of 3 GeV is obtained with the initial-state radiation (ISR) method ...

Sciolla, Gabriella

406

Beams, brightness, and background: Using active spectroscopy techniques for precision measurements in fusion plasma research  

Science Conference Proceedings (OSTI)

The use of an injected neutral beam-either a dedicated diagnostic beam or the main heating beams-to localize and enhance plasma spectroscopic measurements can be exploited for a number of key physics issues in magnetic confinement fusion research, yielding detailed profile information on thermal and fast ion parameters, the radial electric field, plasma current density, and turbulent transport. The ability to make these measurements has played a significant role in much of our recent progress in the scientific understanding of fusion plasmas. The measurements can utilize emission from excited state transitions either from plasma ions or from the beam atoms themselves. The primary requirement is that the beam 'probe' interacts with the plasma in a known fashion. Advantages of active spectroscopy include high spatial resolution due to the enhanced localization of the emission and the use of appropriate imaging optics, background rejection through the appropriate modulation and timing of the beam and emission collection/detection system, and the ability of the beam to populate emitter states that are either nonexistent or too dim to utilize effectively in the case of standard or passive spectroscopy. In addition, some active techniques offer the diagnostician unique information because of the specific quantum physics responsible for the emission. This paper will describe the general principles behind a successful active spectroscopic measurement, emphasize specific techniques that facilitate the measurements and include several successful examples of their implementation, briefly touching on some of the more important physics results. It concludes with a few remarks about the relevance and requirements of active spectroscopic techniques for future burning plasma experiments.

Thomas, Dan M. [General Atomics, P.O. Box 85608, San Diego, California 92186-5608 (United States)

2012-05-15T23:59:59.000Z

407

A High-Precision Fast-Response Airborne CO2 Analyzer for In Situ Sampling from the Surface to the Middle Stratosphere  

Science Conference Proceedings (OSTI)

Two in situ CO2 analyzers have been developed for deployment on the NASA ER-2 aircraft and on stratospheric balloons. The ER-2 instrument has had more than 150 flights during 21 deployments from 1992 to 2000, resulting in a dataset with nearly ...

B. C. Daube Jr.; K. A. Boering; A. E. Andrews; S. C. Wofsy

2002-10-01T23:59:59.000Z

408

On-Site Calibration for High Precision Measurements of Water Vapor Isotope Ratios Using Off-Axis Cavity-Enhanced Absorption Spectroscopy  

Science Conference Proceedings (OSTI)

Stable isotope ratio measurements of atmospheric water vapor (?18Ov and ?2Hv) are scarce relative to those in precipitation. This limitation is rapidly changing due to advances in absorption spectroscopy technology and the development of ...

Joshua Rambo; Chun-Ta Lai; James Farlin; Matt Schroeder; Ken Bible

2011-11-01T23:59:59.000Z

409

Advancing the use of radiocarbon in studies of global and regional carbon cycling with high precision measurements of ¹?C in CO? from the Scripps CO? Program  

E-Print Network (OSTI)

3.8.5 Fossil fuelvariability in fossil fuel emissions . . . . . . . . . 3.7.6pro?les of biogenic and fossil fuel-derived CO 2 from air-

Graven, Heather Dawn

2008-01-01T23:59:59.000Z

410

Advancing the use of radiocarbon in studies of global and regional carbon cycling with high precision measurements of ¹?C in CO? from the Scripps CO? Program  

E-Print Network (OSTI)

50 years ago. As the nuclear weapons tests of the 1950s andexcess 14 C derived from nuclear weapons testing has beenof intensive testing of nuclear weapons during the 1950s and

Graven, Heather Dawn

2008-01-01T23:59:59.000Z

411

Advancing the use of radiocarbon in studies of global and regional carbon cycling with high precision measurements of ¹?C in CO? from the Scripps CO? Program  

E-Print Network (OSTI)

of radiocarbon from nuclear tests. o Nature, 206(4988),weapons tests. After the nuclear test ban treaty in 1963, ?years ago. As the nuclear weapons tests of the 1950s and 60s

Graven, Heather Dawn

2008-01-01T23:59:59.000Z

412

High energy resolution, high angular acceptance crystal monochromator  

DOE Patents (OSTI)

A 4-bounce dispersive crystal monochromator reduces the bandpass of synchrotron radiation to a 10-50 meV range without sacrificing angular acceptance. The monochromator includes the combination of an asymmetrical channel-cut single crystal of lower order reflection and a symmetrical channel-cut single crystal of higher order reflection in a nested geometric configuration. In the disclosed embodiment, a highly asymmetrically cut (.alpha.=20) outer silicon crystal (4 2 2) with low order reflection is combined with a symmetrically cut inner silicon crystal (10 6 4) with high order reflection to condition a hard x-ray component (5-30 keV) of synchrotron radiation down to the .mu.eV-neV level. Each of the crystals is coupled to the combination of a positioning inchworm and angle encoder via a respective rotation stage for accurate relative positioning of the crystals and precise energy tuning of the monochromator.

Alp, Ercan E. (Bolingbrook, IL); Mooney, Timothy M. (Westmont, IL); Toellner, Thomas (Green Bay, WI)

1996-06-04T23:59:59.000Z

413

High energy resolution, high angular acceptance crystal monochromator  

DOE Patents (OSTI)

A 4-bounce dispersive crystal monochromator reduces the bandpass of synchrotron radiation to a 10-50 meV range without sacrificing angular acceptance. The monochromator includes the combination of an asymmetrical channel-cut single crystal of lower order reflection and a symmetrical channel-cut single crystal of higher order reflection in a nested geometric configuration. In the disclosed embodiment, a highly asymmetrically cut ({alpha}=20) outer silicon crystal (4 2 2) with low order reflection is combined with a symmetrically cut inner silicon crystal (10 6 4) with high order reflection to condition a hard x-ray component (5--30 keV) of synchrotron radiation down to the {micro}eV-neV level. Each of the crystals is coupled to the combination of a positioning inchworm and angle encoder via a respective rotation stage for accurate relative positioning of the crystals and precise energy tuning of the monochromator. 7 figs.

Alp, E.E.; Mooney, T.M.; Toellner, T.

1996-06-04T23:59:59.000Z

414

A Novel Two-Step Laser Ranging Technique for a Precision Test of the Theory of Gravity  

E-Print Network (OSTI)

All powered spacecraft experience residual systematic acceleration due to anisotropy of the thermal radiation pressure and fuel leakage. The residual acceleration limits the accuracy of any test of gravity that relies on the precise determination of the spacecraft trajectory. We describe a novel two-step laser ranging technique, which largely eliminates the effects of non-gravity acceleration sources and enables celestial mechanics checks with unprecedented precision. A passive proof mass is released from the mother spacecraft on a solar system exploration mission. Retro-reflectors attached to the proof mass allow its relative position to the spacecraft to be determined using optical ranging techniques. Meanwhile, the position of the spacecraft relative to the Earth is determined by ranging with a laser transponder. The vector sum of the two is the position, relative to the Earth, of the proof mass, the measurement of which is not affected by the residual accelerations of the mother spacecraft. We also describe the mission concept of the Dark Matter Explorers (DMX), which will demonstrate this technology and will use it to test the hypothesis that dark matter congregates around the sun. This hypothesis implies a small apparent deviation from the inverse square law of gravity, which can be detected by a sensitive experiment. We expect to achieve an acceleration resolution of $\\sim 10^{-14} m/s^2$. DMX will also be sensitive to acceleration towards the galactic center, which has a value of $\\sim 10^{-10} m/s^2$. Since dark matter dominates the galactic acceleration, DMX can also test whether dark matter obeys the equivalence principle to a level of 100 ppm by ranging to several proof masses of different composition from the mother spacecraft.

Konstantin Penanen; Talso Chui

2004-06-04T23:59:59.000Z

415

Design and Analysis of Salmonid Tagging Studies in the Columbia Basin, Volume XIV; Appraisal of the Relationship between Tag Detection Efficiency at Bonneville Dam and the Precision in Estuarine and Marine Survival Estimates on Returning PIT Tagged Chinook Salmon, 2000 Technical Report.  

DOE Green Energy (OSTI)

In the advent of the installation of a PIT-tag interrogation system in the Cascades Island fish ladder at Bonneville Dam, this report provides guidance on the anticipated precision of salmonid estuarine and marine survival estimates, for various levels of system-wide adult detection probability at Bonneville Dam. Precision was characterized by the standard error of the survival estimates and the coefficient of variation of the survival estimates. The anticipated precision of salmonid estuarine and marine survival estimates was directly proportional to the number of PIT-tagged smolts released and to the system-wide adult detection efficiency at Bonneville Dam, as well as to the in-river juvenile survival above Lower Granite Dam. Moreover, for a given release size and system-wide adult detection efficiency, higher estuarine and marine survivals did also produce more precise survival estimates. With a system-wide detection probability of P{sub BA} = 1 at Bonneville Dam, the anticipated CVs for the estuarine and marine survival ranged between 41 and 88% with release sizes of 10,000 smolts. Only with the 55,000 smolts being released from sites close to Lower Granite Dam and under high estuarine and marine survival, could CVs of 20% be attained with system detection efficiencies of less than perfect detection (i.e., P{sub BA} < 1).

Perez-Comas, Jose A.; Skalski, John R. (University of Washington, School of Fisheries, Seattle, WA)

2000-07-01T23:59:59.000Z

416

Precise Extraction of the Neutron Magnetic Form Factor from Quasi-elastic 3He(pol)(e(pol),e') at Q^2 = 0.1-0.6 (GeV/c)^2  

SciTech Connect

We have measured the transverse asymmetry A{sub T'} in the quasi-elastic {sup 3}/rvec He/(/rvec e/,e') process with high precision at Q{sup 2}-values from 0.1 to 0.6 (GeV/c){sup 2}. The neutron magnetic form factor G{sub M}{sup n} was extracted at Q{sup 2}-values of 0.1 and 0.2 (GeV/c){sup 2} using a non-relativistic Faddeev calculation which includes both final-state interactions (FSI) and meson-exchange currents (MEC). Theoretical uncertainties due to the FSI and MEC effects were constrained with a precision measurement of the spin-dependent asymmetry in the threshold region of {sup 3}/rvec He/(/rvec e/,e'). We also extracted the neutron magnetic form factor G{sub M}{sup n} at Q{sup 2}-values of 0.3 to 0.6 (GeV/c){sup 2} based on Plane Wave Impulse Approximation calculations.

Jens-ole Hansen; Brian Anderson; Leonard Auerbach; Todd Averett; William Bertozzi; Tim Black; John Calarco; Lawrence Cardman; Gordon Cates; Zhengwei Chai; Jiang-Ping Chen; Seonho Choi; Eugene Chudakov; Steve Churchwell; G Corrado; Christopher Crawford; Daniel Dale; Alexandre Deur; Pibero Djawotho; Dipangkar Dutta; John Finn; Haiyan Gao; Ronald Gilman; Oleksandr Glamazdin; Charles Glashausser; Walter Gloeckle; Jacek Golak; Javier Gomez; Viktor Gorbenko; F. Hersman; Douglas Higinbotham; Richard Holmes; Calvin Howell; Emlyn Hughes; Thomas Humensky; Sebastien Incerti; Piotr Zolnierczuk; Cornelis De Jager; John Jensen; Xiaodong Jiang; Cathleen Jones; Mark Jones; R Kahl; H Kamada; A Kievsky; Ioannis Kominis; Wolfgang Korsch; Kevin Kramer; Gerfried Kumbartzki; Michael Kuss; Enkeleida Lakuriqi; Meihua Liang; Nilanga Liyanage; John LeRose; Sergey Malov; Demetrius Margaziotis; Jeffery Martin; Kathy McCormick; Robert McKeown; Kevin McIlhany; Zein-Eddine Meziani; Robert Michaels; Greg Miller; Joseph Mitchell; Sirish Nanda; Emanuele Pace; Tina Pavlin; Gerassimos Petratos; Roman Pomatsalyuk; David Pripstein; David Prout; Ronald Ransome; Yves Roblin; Marat Rvachev; Giovanni Salme; Michael Schnee; Charles Seely; Taeksu Shin; Karl Slifer; Paul Souder; Steffen Strauch; Riad Suleiman; Mark Sutter; Bryan Tipton; Luminita Todor; M Viviani; Branislav Vlahovic; John Watson; Claude Williamson; H Witala; Bogdan Wojtsekhowski; Feng Xiong; Wang Xu; Jen-chuan Yeh

2006-05-05T23:59:59.000Z

417

Precision flyer initiator  

DOE Green Energy (OSTI)

A propulsion point design is presented for lifting geological samples from Mars. Vehicle complexity is kept low by choosing a monopropellant single stage. Little new development is needed, as miniature pump fed hydrazine has been demonstrated. Loading the propellant just prior to operation avoids structural, thermal, and safety constraints otherwise imposed by earlier mission phases. hardware mass and engineering effort are thereby diminished. The Mars liftoff mass is 7/8 hydrazine, <5% propulsion hardware, and >3% each for the payload and guidance.

Frank, A

1999-04-19T23:59:59.000Z

418

Precision Wire Forming  

SciTech Connect

An air-operated semiautomatic wire former was designed and built at Mound Laboratory to form specific types of electrodes to be molded in plastic parts. Use of the semiautomatic wire former eliminates the sliding action of tooling on the surface of the electrode wire to be formed and properly aligns the crimped electrode surfaces to within required tolerance ranges. These are difficulties which are characteristic of conventional wire forming tooling. Interchangeable tooling is provided with the semiautomatic wire former for forming electrode wires in one plane; secondary tooling was designed and bulit for forming electrode wires in two planes; and a special series of tooling was designed for forming more complex wire forms.

Weeks, J. E.; Osborne, J. M.

1970-08-07T23:59:59.000Z

419

Precision contour gage  

DOE Patents (OSTI)

An apparatus for gaging the contour of a machined part includes a rotary slide assembly and a linear probe assembly supported by the rotary slide assembly. The linear probe assembly is comprised of a suspension arm and a tip assembly including a probe tip for contacting the part. The suspension arm is supported by the rotary slide assembly and includes a slider portion which is capable of sliding upon a complementary rail located on a rotating platform at the top of the rotary slide assembly. By engagement of the slider with the rail, the linear probe assembly is capable of being positioned with respect to the rotary slide assembly. Repositioning is required when a concave part to be measured is substituted for a convex part or vice versa. A kinematic mount supports the entire contour gaging apparatus. A motor drives the rotary slide assembly, and the motor is controlled by a numerical control apparatus. The rotation of the rotary slide assembly is measured by a digital encoder. The probe tip provides a measure of linear displacement of the tip on the surface of the part. As the rotary slide assembly rotates and as the probe tip contact the part, a series of actual data points are generated representing the actual contour of the part. In a numerical controller, the actual contour is compared with a stored ideal contour, and a disparity between the two is calculated. In real-time, the settings of the machining apparatus may be adjusted by the numerical controller, and additional machining operations can continue until the actual contour is as close to the ideal contour as desired. 4 figs.

Bieg, L.F.

1989-02-09T23:59:59.000Z

420

Precision alignment device  

DOE Patents (OSTI)

Apparatus for providing automatic alignment of beam devices having an associated structure for directing, collimating, focusing, reflecting, or otherwise modifying the main beam. A reference laser is attached to the structure enclosing the main beam producing apparatus and produces a reference beam substantially parallel to the main beam. Detector modules containing optical switching devices and optical detectors are positioned in the path of the reference beam and are effective to produce an electrical output indicative of the alignment of the main beam. This electrical output drives servomotor operated adjustment screws to adjust the position of elements of the structure associated with the main beam to maintain alignment of the main beam. 5 figs.

Jones, N.E.

1988-03-10T23:59:59.000Z

Note: This page contains sample records for the topic "high precision tester" 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

Precision wood particle feedstocks  

DOE Patents (OSTI)

Wood particles having fibers aligned in a grain, wherein: the wood particles are characterized by a length dimension (L) aligned substantially parallel to the grain, a width dimension (W) normal to L and aligned cross grain, and a height dimension (H) normal to W and L; the L.times.H dimensions define two side surfaces characterized by substantially intact longitudinally arrayed fibers; the W.times.H dimensions define two cross-grain end surfaces characterized individually as aligned either normal to the grain or oblique to the grain; the L.times.W dimensions define two substantially parallel top and bottom surfaces; and, a majority of the W.times.H surfaces in the mixture of wood particles have end checking.

Dooley, James H; Lanning, David N

2013-07-30T23:59:59.000Z

422

Precision Ratio Measurements  

Science Conference Proceedings (OSTI)

... magnitude and phase angle) of transformers for primary ... If the test conditions and the device under ... the secondary burden for each transformer or for ...

2013-06-27T23:59:59.000Z

423

Elastically averaged precision alignment  

E-Print Network (OSTI)

One of the most important steps in designing a machine is the consideration of the effect of interfaces between components. A badly designed interface can vary from costly difficulties such as additional control or calibration ...

Willoughby, Patrick (Patrick John), 1978-

2005-01-01T23:59:59.000Z

424

Initial stages of high temperature metal oxidation  

Science Conference Proceedings (OSTI)

The application of XPS and UPS to the study of the initial stages of high temperature (> 350/sup 0/C) electrochemical oxidation of iron and nickel is discussed. In the high temperature experiments, iron and nickel electrodes were electrochemically oxidized in contact with a solid oxide electrolyte in the uhv system. The great advantages of this technique are that the oxygen activity at the interface may be precisely controlled and the ability to run the reactions in uhv allows the simultaneous observation of the reactions by XPS.

Yang, C.Y.; O'Grady, W.E.

1981-01-01T23:59:59.000Z

425

High efficiency inverter and ballast circuits  

SciTech Connect

A high efficiency push-pull inverter circuit employing a pair of relatively high power switching transistors is described. The switching on and off of the transistors is precisely controlled to minimize power losses due to common-mode conduction or due to transient conditions that occur in the process of turning a transistor on or off. Two current feed-back transformers are employed in the transistor base drives; one being saturable for providing a positive feedback, and the other being non-saturable for providing a subtractive feedback.

Nilssen, O.K.

1984-02-07T23:59:59.000Z

426

A PRECISION MEASUREMENT OF THE NEUTRINO MIXING ANGLE THETA (SUB 13) USING REACTOR ANTINEUTRINOS AT DAYA BAY.  

Science Conference Proceedings (OSTI)

This document describes the design of the Daya Bay reactor neutrino experiment. Recent discoveries in neutrino physics have shown that the Standard Model of particle physics is incomplete. The observation of neutrino oscillations has unequivocally demonstrated that the masses of neutrinos are nonzero. The smallness of the neutrino masses (<2 eV) and the two surprisingly large mixing angles measured have thus far provided important clues and constraints to extensions of the Standard Model. The third mixing angle, {delta}{sub 13}, is small and has not yet been determined; the current experimental bound is sin{sup 2} 2{theta}{sub 13} < 0.17 at 90% confidence level (from Chooz) for {Delta}m{sub 31}{sup 2} = 2.5 x 10{sup -3} eV{sup 2}. It is important to measure this angle to provide further insight on how to extend the Standard Model. A precision measurement of sin{sup 2} 2{theta}{sub 13} using nuclear reactors has been recommended by the 2004 APS Multi-divisional Study on the Future of Neutrino Physics as well as a recent Neutrino Scientific Assessment Group (NUSAG) report. We propose to perform a precision measurement of this mixing angle by searching for the disappearance of electron antineutrinos from the nuclear reactor complex in Daya Bay, China. A reactor-based determination of sin{sup 2} 2{theta}{sub 13} will be vital in resolving the neutrino-mass hierarchy and future measurements of CP violation in the lepton sector because this technique cleanly separates {theta}{sub 13} from CP violation and effects of neutrino propagation in the earth. A reactor-based determination of sin{sup 2} 2{theta}{sub 13} will provide important, complementary information to that from long-baseline, accelerator-based experiments. The goal of the Daya Bay experiment is to reach a sensitivity of 0.01 or better in sin{sup 2} 2{theta}{sub 13} at 90% confidence level.

KETTELL, S.; ET AL.

2006-10-16T23:59:59.000Z

427

Annual Logging Symposium, June 22-26, 2013 FAST ESTIMATION OF PERMEABILITY FROM FORMATION-TESTER  

E-Print Network (OSTI)

permeability (or mobility) from transient measurements of pressure and fractional flow. We develop a new method was prepared for presentation at the SPWLA 54th Annual Logging Symposium held in New Orleans, Louisiana, June mobility because more streamlines track flow into probes from large-mobility layers. In the presence of 5

Torres-Verdín, Carlos

428

Electrical power subsystem integration and test for the NPS solar cell array tester CubeSat .  

E-Print Network (OSTI)

??The electrical power subsystem is one of the most important elements of any satellite. This system must provide the necessary power to enable the payload… (more)

Fletcher James Martin.

2010-01-01T23:59:59.000Z

429

Annual Logging Symposium, May 25-28, 2008 COMPARISON OF WIRELINE FORMATION-TESTER SAMPLING  

E-Print Network (OSTI)

or an underbalanced drilling environment, there is no difference between the performances of focused or conventional-implicit compositional reservoir simulator is used to model both invasion and filtrate-cleanup processes. Comparison to a variety of circumstances, including the drilling environment, formation properties, and radial extent

Torres-Verdín, Carlos

430

High PRF high current switch  

DOE Green Energy (OSTI)

A triggerable, high voltage, high current, spark gap switch for use in pu power systems. The device comprises a pair of electrodes in a high pressure hydrogen environment that is triggered by introducing an arc between one electrode and a trigger pin. Unusually high repetition rates may be obtained by undervolting the switch, i.e., operating the trigger at voltages much below the self-breakdown voltage of the device.

Moran, Stuart L. (Fredericksburg, VA); Hutcherson, R. Kenneth (College Park, MD)

1990-03-27T23:59:59.000Z

431

HIGH INTENSITY BEAM OPERATION OF THE BROOKHAVEN AGS  

SciTech Connect

For the last few years the Brookhaven AGS has operated at record proton intensities. This high beam intensity allowed for the simultaneous operation of several high precision rare kaon decay experiments. The record beam intensities were achieved after the AGS Booster was commissioned and a transition jump system, a powerful transverse damper, and an rf upgrade in the AGS were completed. The intensity is presently limited by space charge effects at both Booster and AGS injection and transverse instabilities in the AGS.

ROSER,T.

1999-06-28T23:59:59.000Z

432

Spin structure in high energy processes: Proceedings  

Science Conference Proceedings (OSTI)

This report contains papers as the following topics: Spin, Mass, and Symmetry; physics with polarized Z{sup 0}s; spin and precision electroweak physics; polarized electron sources; polarization phenomena in quantum chromodynamics; polarized lepton-nucleon scattering; polarized targets in high energy physics; spin dynamics in storage rings and linear accelerators; spin formalism and applications to new physics searches; precision electroweak physics at LEP; recent results on heavy flavor physics from LEP experiments using 1990--1992 data; precise measurement of the left-right cross section asymmetry in Z boson production by electron-positron collisions; preliminary results on heavy flavor physics at SLD; QCD tests with SLD and polarized beams; recent results from TRISTAN at KEK; recent B physics results from CLEO; searching for the H dibaryon at Brookhaven; recent results from the compton observatory; the spin structure of the deuteron; spin structure of the neutron ({sup 3}HE) and the Bjoerken sum rule; a consumer`s guide to lattice QCD results; top ten models constrained by b {yields} sy; a review of the Fermilab fixed target program; results from the D0 experiment; results from CDF at FNAL; quantum-mechanical suppression of bremsstrahlung; report from the ZEUS collaboration at HERA; physics from the first year of H1 at HERA, and hard diffraction. These papers have been cataloged separately elsewhere.

DePorcel, L.; Dunwoodie, C. [eds.

1994-12-01T23:59:59.000Z

433

APPLIED RESEARCH CENTER HIGH-TECH SOLUTIONS  

E-Print Network (OSTI)

Industrial: Light Emitting Diodes (LED), Precision Cutting, Drilling, Hardening, Marking, Engraving, Melting

434

Figure 1. Current-sensing calibration circuit consisting of an auxiliary switch Qa and a precision sensing resistor Rs in parallel with a main  

E-Print Network (OSTI)

Using a power MOSFET with built-in current-sensing mirror ("SenseFet") CT Using a current transformer Qa and a precision sensing resistor Rs in parallel with a main power switch Q. The auxiliary switch-line Calibration of Lossless Current Sensing Yang Zhang, Regan Zane, Dragan Maksimovic Colorado Power Electronics

435

Optical Observations of GRO J1655-40 in Quiescence I: A Precise Mass for the Black Hole Primary  

E-Print Network (OSTI)

We report photometric and spectroscopic observations of the black hole binary GRO J1655-40 in complete quiescence. In contrast to the 1995 photometry, the light curves from 1996 are almost completely dominated by ellipsoidal modulations from the secondary star. Model fits to the light curves, which take into account the temperature profile of the accretion disk and eclipse effects, yield an inclination of i=69.50 +/- 0.08 degrees and a mass ratio of Q=2.99 +/- 0.08. The precision of our determinations of i and Q allow us to determine the black hole mass to an accuracy of approximately 4% (7.02 +/- 0.22 solar masses). The secondary star's mass is 2.34 +/- 0.12 solar masses. The position of the secondary on the Hertzsprung-Russell diagram is consistent with that of a 2.3 solar mass star which has evolved off the main sequence and is halfway to the start of the giant branch. Using the new spectra we present an improved value of the spectroscopic period (2.62157 +/- 0.00015 days), radial velocity semiamplitude (228.2 +/- 2.2 km/sec), and mass function (3.24 +/- 0.09 solar masses). Evolutionary models suggest an average mass transfer rate for such a system of 3.4E-9 solar masses per year (2.16E+17 grams per second), which is much larger than the average mass transfer rates implied in the other six transient black hole systems, but still barely below the critical mass transfer rate required for stability.

Jerome A. Orosz; Charles D. Bailyn

1996-10-25T23:59:59.000Z

436

The Feynman-Y Statistic in Relation to Shift-Register Neutron Coincidence Counting: Precision and Dead Time  

SciTech Connect

The Feynman-Y statistic is a type of autocorrelation analysis. It is defined as the excess variance-to-mean ratio, Y = VMR - 1, of the number count distribution formed by sampling a pulse train using a series of non-overlapping gates. It is a measure of the degree of correlation present on the pulse train with Y = 0 for Poisson data. In the context of neutron coincidence counting we show that the same information can be obtained from the accidentals histogram acquired using the multiplicity shift-register method, which is currently the common autocorrelation technique applied in nuclear safeguards. In the case of multiplicity shift register analysis however, overlapping gates, either triggered by the incoming pulse stream or by a periodic clock, are used. The overlap introduces additional covariance but does not alter the expectation values. In this paper we discuss, for a particular data set, the relative merit of the Feynman and shift-register methods in terms of both precision and dead time correction. Traditionally the Feynman approach is applied with a relatively long gate width compared to the dieaway time. The main reason for this is so that the gate utilization factor can be taken as unity rather than being treated as a system parameter to be determined at characterization/calibration. But because the random trigger interval gate utilization factor is slow to saturate this procedure requires a gate width many times the effective 1/e dieaway time. In the traditional approach this limits the number of gates that can be fitted into a given assay duration. We empirically show that much shorter gates, similar in width to those used in traditional shift register analysis can be used. Because the way in which the correlated information present on the pulse train is extracted is different for the moments based method of Feynman and the various shift register based approaches, the dead time losses are manifested differently for these two approaches. The resulting estimates for the dead time corrected first and second order reduced factorial moments should be independent of the method however and this allows the respective dead time formalism to be checked. We discuss how to make dead time corrections in both the shift register and the Feynman approaches.

Croft, Stephen [Los Alamos National Laboratory; Santi, Peter A. [Los Alamos National Laboratory; Henzlova, Daniela [Los Alamos National Laboratory; Hauck, Danielle K. [Los Alamos National Laboratory; Favalli, Andrea [Los Alamos National Laboratory

2012-07-13T23:59:59.000Z

437

High intensity performance of the Brookhaven AGS  

SciTech Connect

Experience and results from recent high intensity proton running periods of the Brookhaven AGS, during which a record intensity for a proton synchrotron of 6.3 x 10{sup 13} protons/pulse was reached, is presented. This high beam intensity allowed for the simultaneous operation of three high precision rare kaon decay experiments. The record beam intensities were achieved after the 1.5 GeV Booster was commissioned and a transition jump system, a powerful transverse damper, and an rf upgrade in the AGS were completed. Recently even higher intensity proton synchrotrons are studied for neutron spallation sources or proton driver for a muon collider. Implications of the experiences from the AGS to these proposals and also possible future upgrades for the AGS are discussed.

Brennan, J.M.; Roser, T.

1996-07-01T23:59:59.000Z

438

Design and Control of a Compact 6-Degree-of-Freedom Precision Positioner with Linux- Based Real-Time Control  

E-Print Network (OSTI)

This dissertation presents the design, control, and implementation of a compact highprecision multidimensional positioner. This precision-positioning system consists of a novel concentrated-field magnet matrix and a triangular single-moving part that carries three 3-phase permanent-magnet planar-levitation-motor armatures. Since only a single levitated moving part, namely the platen, generates all required fine and coarse motions, this positioning system is reliable and potentially cost-effective. The three planar levitation motors based on the Lorentz-force law not only produce the vertical force to levitate the triangular platen but also control the platen's position and orientation in the horizontal plane. Three laser distance sensors are used to measure vertical, x-, and yrotation motions. Three 2-axis Hall-effect sensors are used to determine lateral motions and rotation motion about the z-axis by measuring the magnetic flux density generated by the magnet matrix. This positioning system has a total mass of 1.52 kg, which is the minimized mass to produce better dynamic performance. In order to reduce the mass of the moving platen, it is made of Delrin with a mass density of 1.54 g/cm3 by Computer Numerical Controlled (CNC) machining. The platen can be regarded a pure mass, and the spring and damping effects are neglected except for the vertical dynamic. Single-input single-output (SISO) digital lead-lag controllers and a multivariable Linear Quadratic Gaussian (LQG) controller were designed and implemented. Real-time control was performed with the Linux-Ubuntu operating system OS. Real Time Application Interface (RTAI) for Linux works with Comedi and Comedi libraries and enables closed-loop real-time control. One of the key advantages of this positioning stage with Hall-effect sensors is the extended travel range and rotation angle in the horizontal mode. The maximum travel ranges of 220 mm in x and 200 mm in y were achieved experimentally. Since the magnet matrix generates periodical sinusoidal flux densities in the x-y plane, the travel range can be extended by increasing the number of magnet pitches. The rotation angle of 12 degrees was achieved in rotation around z. The angular velocities of 0.2094 rad/s and 4.74 rad/s were produced by a 200-mm-diameter circular motion and a 30-mm-diameter spiral motion, respectively. The maximum velocity of 16.25 mm/s was acquired from over one pitch motion. The maximum velocity of 17.5 mm/s in a 8-mm scanning motion was achieved with the acceleration of 72.4 m/s2. Step responses demonstrated a 10-um resolution and 6-um rms position noise in the translational mode. For the vertical mode, step responses of 5 um in z, 0.001 degrees in roation around x, and 0.001 degrees in rotation around y were achieved. This compact single-moving-part positioner has potential applications for precisionpositioning systems in semiconductor- manufacturing.

Yu, Ho

2009-08-01T23:59:59.000Z

439

American Institute of Aeronautics and Astronautics Violet: A High-Agility Nanosatellite for Demonstrating  

E-Print Network (OSTI)

-precision sensors, such as a star tracker and a fiber-optic rate gyroscope, with high-agility kinematics: 10 o /sec as an experimental platform for Honeywell's plug-and-play momentum-control system, their Mini-MCS8 . Through Control System with Steering Law Highlighted #12;American Institute of Aeronautics and Astronautics 092407

Peck, Mason A.

440

A Mobile High Resolution Gamma Ray Spectrometry System for Radiological Surveys  

Science Conference Proceedings (OSTI)

Surveying nuclear power plant sites for radioactive contamination is an expensive part of the overall decommissioning process. This report details a mobile radiological survey system designed to produce a rapid and cost effective radiological characterization of outdoor land areas. The system combines high resolution gamma ray spectrometry with modern automated surveying techniques to precisely locate areas of contamination.

1998-12-04T23:59:59.000Z

Note: This page contains sample records for the topic "high precision tester" 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

Fundamental Performance Determining Factors of the Ultrahigh-Precision Space-Borne Optical Metrology System for the LISA Pathfinder mission  

E-Print Network (OSTI)

The LISA Pathfinder mission to space employs an optical metrology system (OMS) at its core to measure the distance and attitude between two freely floating test-masses to picometer and nanorad accuracy, respectively, within the measurement band of [1 mHz, 30 mHz]. The OMS is based upon an ultra-stable optical bench with 4 heterodyne interferometers from which interference signals are read-out and processed by a digital phase-meter. Laser frequency noise, power fluctuations and optical path-length variations are suppressed to uncritical levels by dedicated control loops so that the measurement performance approaches the sensor limit imposed by the phase-meter. The system design is such that low frequency common mode noise which affects the read-out phase of all four interferometers is generally well suppressed by subtraction of a reference phase from the other interferometer signals. However, high frequency noise directly affects measurement performance and its common mode rejection depends strongly on the relative signal phases. We discuss how the data from recent test campaigns point towards high frequency phase noise as a likely performance limiting factor which explains some important performance features.

Gerald Hechenblaikner; Reinhold Flatscher

2013-07-30T23:59:59.000Z

442

Neutrino Oscillation Experiments for Precise Measurements of Oscillation Parameters and Search for numu->nue Appearance and CP Violation  

E-Print Network (OSTI)

The possibility of making a low cost, very intense high energy proton source at the Brookhaven Alternating Gradient Synchrotron (AGS) along with the forthcoming new large underground detectors at either the National Underground Science Laboratory (NUSL) in Homestake, South Dakota or at the Waste Isolation Pilot Plant (WIPP) in Carlsbad, New Mexico, allows us to propose a program of experiments that will address fundamental aspects of neutrino oscillations and CP-invariance violation. This program of experiments is unique because of the extra-long baseline of more than 2500 km from Brookhaven National Laboratory to the underground laboratories in the West, the high intensity of the proposed conventional neutrino beam, and the possibility of constructing a very large array of water Cerenkov detectors with total mass approaching 1 Megaton. As part of this program we also consider experiments at moderately long baselines (~400 km) using other detector technologies that can yield valuable and complementary information on neutrino oscillations. This letter of intent focuses on the design and construction of the necessary AGS upgrades and the new neutrino beam which will initially have a proton beam of power ~0.5 MW; the power will then be upgraded to ~1.3 MW in a later phase.

D. Beavis

2002-05-14T23:59:59.000Z

443

New and Underutilized Technology: High Bay LED Lighting | Department of  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

High Bay LED Lighting High Bay LED Lighting New and Underutilized Technology: High Bay LED Lighting October 7, 2013 - 8:55am Addthis The following information outlines key deployment considerations for high bay LED lighting within the Federal sector. Benefits LED light sources offer several potential benefits compared to metal halide or fluorescent lighting, including reduced energy consumption due to the ability to provide a more precise light distribution; longer operating life and lower maintenance requirements; less heat introduced into the space; and greater controllability for dimming and on/off control. Relevant to the cold storage application, LED performance improves in colder temperatures. Application High bay LED lighting is applicable for facilities containing high bay

444

High-emission cold cathode  

DOE Patents (OSTI)

A field-emission cathode having a multitude of field emission points for emitting a copious stream of electrons when subjected to a high field is described. The cathode is constructed by compressing a multitude of tungsten strips alternately arranged with molybdenum strips and copper ribbons or compressing alternately arranged copper plated tungsten and molybdenum strips, heating the arrangement to braze the tungsten and molybdenum strips together with the copper, machining and grinding the exposed strip edges of one side of the brazed arrangement to obtain a precisely planar surface, etching a portion of the molybdenum and copper to leave the edges of the tungsten strips protruding for electron emission, and subjecting the protruding edges of the tungsten strips to a high electric field to degas and roughen the surface to pnovide a large number of emitting points. The resulting structure is particularly useful as a cathode in a transversely excited gaseous laser where the cathode is mounted in a vacuum chamber for emitting electrons under the influence of a high electric field between the cathode and an extractor grid. The electrons pass through the extractor grid, a thin window in the wall of the laser chamber and into the laser chamber which is filled with a gaseous mixture of helium, nitrogen, and carbon dioxide. A second grid is mounted on the gaseous side of the window. The electrons pass into the laser chamber under the influence of a second electric field between the second grid and an anode in the laser chamber to raise selected gas atoms of the gaseous mixture to appropriately excited states so that a subsequent coherent light beam passing through the mixture transversely to the electron stream through windows in opposite ends of the laser chamber stimulates the excited atoms to amplify the beam. (Official Gazette)

Mancebo, L.

1974-01-29T23:59:59.000Z

445

High Temperature Measurements Of Martensitic transformations Using Digital Holography  

SciTech Connect

During thermal cycling of nickel-aluminum-platinum (NiAlPt) and single crystal Fe-15Cr-15Ni alloys, the structural changes associated with the martensite to austenite phase transformation were measured using dual-wavelength digital holography. Real-time in-situ measurements reveal the formation of striations within the NiPtAl alloy at 70 C and the FeCrNi alloy at 520 C. The results demonstrate that digital holography is an effective technique for acquiring non-contact, high precision information of the surface evolution of alloys at high temperatures.

Thiesing, Benjamin [Northern Arizona University; Mann, Christopher J [Northern Arizona University; Dryepondt, Sebastien N [ORNL

2013-01-01T23:59:59.000Z

446

High-speed nanometer-resolved imaging vibrometer and velocimeter  

Science Conference Proceedings (OSTI)

Conventional laser vibrometers are incapable of performing multidimensional vibrometry at high speeds because they build on single-point measurements and rely on beam scanning, significantly limiting their utility and precision. Here we introduce a laser vibrometer that performs high-speed multidimensional imaging-based vibration and velocity measurements with nanometer-scale axial resolution without the need for beam scanning. As a proof-of-concept, we demonstrate real-time microscopic imaging of acoustic vibrations with 1 nm axial resolution, 1200 image pixels, and 30 ps dwell time at 36.7 MHz scan rate.

Mahjoubfar, Ata; Goda, Keisuke; Fard, Ali [Department of Electrical Engineering, Photonics Laboratory, University of California, Los Angeles, California 90095 (United States); California NanoSystems Institute, University of California, Los Angeles, California 90095 (United States); Ayazi, Ali; Kim, Sang Hyup [Department of Electrical Engineering, Photonics Laboratory, University of California, Los Angeles, California 90095 (United States); Jalali, Bahram [Department of Electrical Engineering, Photonics Laboratory, University of California, Los Angeles, California 90095 (United States); California NanoSystems Institute, University of California, Los Angeles, California 90095 (United States); Department of Surgery, David Geffen School of Medicine, University of California, Los Angeles, California 90095 (United States)

2011-03-07T23:59:59.000Z

447

High intensity performance and upgrades at the Brookhaven AGS  

SciTech Connect

For the last two years the Brookhaven AGS has operated the slow extracted beam program at record proton intensities. This high beam intensity allowed for the simultaneous operation of three high precision rare kaon decay experiments. The record beam intensities were achieved after the 1.5 GeV Booster was commissioned and a transition jump system, a powerful transverse damper, and an rf upgrade in the AGS were completed. Recently even higher intensity proton synchrotrons are studied for neutron spallation sources or proton driver for a muon collider. Implications of the experiences from the AGS to these proposals and also possible future upgrades for the AGS are discussed.

Roser, T.

1996-12-31T23:59:59.000Z

448

High-resolution seismic studies applied to injected geothermal fluids  

DOE Green Energy (OSTI)

The application of high-resolution microseismicity studies to the problem of monitoring injected fluids is one component of the Geothermal Injection Monitoring Project at LLNL. The evaluation of microseismicity includes the development of field techniques, and the acquisition and processing of events during the initial development of a geothermal field. To achieve a specific detection threshold and location precision, design criteria are presented for seismic networks. An analysis of a small swarm near Mammoth Lakes, California, demonstrates these relationships and the usefulness of high-resolution seismic studies. A small network is currently monitoring the Mammoth-Pacific geothermal power plant at Casa Diablo as it begins production.

Smith, A.T.; Kasameyer, P.

1985-01-01T23:59:59.000Z

449

High Efficiency Single Photon Detector  

Science Conference Proceedings (OSTI)

... The wire is cooled to less than 2 K and biased with a current precisely set to just below the critical threshold at which the material switches to a ...

2013-03-12T23:59:59.000Z

450

Transportable calorimeter measurements of highly enriched uranium  

SciTech Connect

A sensitive calorimeter has been combined with a small temperature-controlled water bath to compose a transportable system that is capable of measuring multikilogram quantities of highly enriched uranium (HEU). The sample chamber size, 5 in. in diameter by 10 in. high, is large enough to hold sufficient HEU metal or high-grade scrap to provide a measurable thermal signal. Calorimetric measurements performed on well-characterized material indicate that the thermal power generated by 93% {sup 235}U samples with 1.0% {sup 234}U can be measured with a precision of about 1% (1 sigma) for 4-kg samples. The transportable system consists of a twin-bridge calorimeter installed inside a 55-gal. stainless steel drum filled with water with heating and cooling supplied by a removable thermoelectric module attached to the side. Isotopic measurements using high-resolution gamma-ray measurements of the HEU samples and analysis with the FRAM code were used to determine the isotopic ratios and specific power of the samples. This information was used to transform the measured thermal power into grams of HEU. Because no physical standards are required, this system could be used for the verification of plutonium, {sup 238}Pu heat sources, or large quantities of metal or other high-grade matrix forms of HEU.

Rudy, C.; Bracken, D.S.; Staples, P.; Carrillo, L.

1997-11-01T23:59:59.000Z

451

Data Plots of Run I - III Results from SLAC E-158: A precision Measurement of the Weak Mixing Angle in Moller Scattering  

DOE Data Explorer (OSTI)

Three physics runs were made in 2002 and 2003 by E-158. As a result, the E-158 Collaboration announced that it had made "the first observation of Parity Violation in electron-electron (Moller) scattering). This precise Parity Violation measurement gives the best determination of the electron's weak charge at low energy (low momentum transfer between interacting particles). E158's measurement tests the predicted running (or evolution) of this weak charge with energy, and searches for new phenomena at TeV energy scales (one thousand times the proton-mass energy scale).[Copied from the experiment's public home page at http://www-project slac.stanford.edu/3158/Default.htm] See also the E158 page for collaborators at http://www.slac.stanford.edu/exp/e158/. Both websites provide data and detailed information.

None

452

High Performance Computing  

Science Conference Proceedings (OSTI)

High Performance Computing. Summary: High Performance Computing (HPC) enables work on challenging problems that ...

2012-03-05T23:59:59.000Z

453

Recall-Precision Curve Difference from Median in Precision at ...  

Science Conference Proceedings (OSTI)

... 7C3%& A50VAbADQbA('qA2 p(A3121C5 Q0f9C32 drig@f Q0ed9 C32 dri@ds Q0ef9 C32 drea@i Q0id9 C32 dret@g Q0@d9 C32 dresea ...

2003-03-07T23:59:59.000Z

454

Page not found | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

81 - 28290 of 28,904 results. 81 - 28290 of 28,904 results. Page Systems Engineering and Integration The fuel cycle in use today in the United States faces challenges in achieving the goals of sustainability. While used fuel is safely stored at reactor sites, the development of a system to manage... http://energy.gov/ne/fuel-cycle-technologies/systems-engineering-and-integration Download CX-009179: Categorical Exclusion Determination (0675-1511) Ford Motor Company - High Precision Tester for Automotive and Stationary Batteries CX(s) Applied: B3.6 Date: 09/06/2012 Location(s): Michigan, New Mexico, Texas Offices(s): Advanced Research Projects Agency-Energy http://energy.gov/nepa/downloads/cx-009179-categorical-exclusion-determination Download CX-009180: Categorical Exclusion Determination

455

Categorical Exclusion Determinations: Michigan | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

September 6, 2012 September 6, 2012 CX-009185: Categorical Exclusion Determination (0675 -1565) Penn State University - A Multi-Purpose, Intelligent, and Reconfigurable Battery Pack Health Management System CX(s) Applied: B3.6 Date: 09/06/2012 Location(s): Pennsylvania, Michigan, Michigan Offices(s): Advanced Research Projects Agency-Energy September 6, 2012 CX-009179: Categorical Exclusion Determination (0675-1511) Ford Motor Company - High Precision Tester for Automotive and Stationary Batteries CX(s) Applied: B3.6 Date: 09/06/2012 Location(s): Michigan, New Mexico, Texas Offices(s): Advanced Research Projects Agency-Energy September 5, 2012 CX-009189: Categorical Exclusion Determination (0675-1594) Eaton Corporation - Predictive Battery Management for Commercial Hybrid Vehicles

456

PRECISION COSMOGRAPHY WITH STACKED VOIDS  

SciTech Connect

We present a purely geometrical method for probing the expansion history of the universe from the observation of the shape of stacked voids in spectroscopic redshift surveys. Our method is an Alcock-Paczynski (AP) test based on the average sphericity of voids posited on the local isotropy of the universe. It works by comparing the temporal extent of cosmic voids along the line of sight with their angular, spatial extent. We describe the algorithm that we use to detect and stack voids in redshift shells on the light cone and test it on mock light cones produced from N-body simulations. We establish a robust statistical model for estimating the average stretching of voids in redshift space and quantify the contamination by peculiar velocities. Finally, assuming that the void statistics that we derive from N-body simulations is preserved when considering galaxy surveys, we assess the capability of this approach to constrain dark energy parameters. We report this assessment in terms of the figure of merit (FoM) of the dark energy task force and in particular of the proposed Euclid mission which is particularly suited for this technique since it is a spectroscopic survey. The FoM due to stacked voids from the Euclid wide survey may double that of all other dark energy probes derived from Euclid data alone (combined with Planck priors). In particular, voids seem to outperform baryon acoustic oscillations by an order of magnitude. This result is consistent with simple estimates based on mode counting. The AP test based on stacked voids may be a significant addition to the portfolio of major dark energy probes and its potentialities must be studied in detail.

Lavaux, Guilhem [Department of Physics, University of Illinois at Urbana-Champaign, 1002 West Green Street, Urbana, IL 61801 (United States); Wandelt, Benjamin D. [UPMC Univ Paris 06, UMR 7095, Institut d'Astrophysique de Paris, 98 bis, boulevard Arago, 75014 Paris (France)

2012-08-01T23:59:59.000Z

457

Precise null-pointer analysis  

Science Conference Proceedings (OSTI)

In Java, C or C++, attempts to dereference the null value result in an exception or a segmentation fault. Hence, it is important to identify those program points where this undesired behaviour might occur or prove the other program points (and possibly ... Keywords: Abstract interpretation, Automatic software verification, Java bytecode, Null-pointer analysis, Static analysis

Fausto Spoto

2011-05-01T23:59:59.000Z

458

PRECISION TIME-DELAY CIRCUIT  

DOE Patents (OSTI)

A tine-delay circuit which produces a delay time in d. The circuit a capacitor, an te back resistance, connected serially with the anode of the diode going to ground. At the start of the time delay a negative stepfunction is applied to the series circuit and initiates a half-cycle transient oscillatory voltage terminated by a transient oscillatory voltage of substantially higher frequency. The output of the delay circuit is taken at the junction of the inductor and diode where a sudden voltage rise appears after the initiation of the higher frequency transient oscillations.

Creveling, R.

1959-03-17T23:59:59.000Z

459

NIST Boulder's Precision Measurement Laboratory  

Science Conference Proceedings (OSTI)

... Design and construction of the $118.6 million advanced laboratory was funded in part through NIST appropriations, with $84.9 million of that total ...

2012-04-10T23:59:59.000Z

460

Precision zero-home locator  

DOE Patents (OSTI)

A zero-home locator includes a fixed phototransistor switch and a moveable actuator including two symmetrical, opposed wedges, each wedge defining a point at which switching occurs. The zero-home location is the average of the positions of the points defined by the wedges.

Stone, William J. (Kansas City, MO)

1986-01-01T23:59:59.000Z

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