Powered by Deep Web Technologies
Note: This page contains sample records for the topic "xmcd chamber 6t" 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.


1

XMCD  

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

optics, the term "dichroism" refers to changes in the absorption of optics, the term "dichroism" refers to changes in the absorption of polarized light on passing through a material in two different directions. Since materials typically absorb one color of white light preferentially, the material appears with two different colors for the two light directions - it is di- (two-) c hroic (colored). Today, the term dichroism is used more generally to reflect the dependence of photon absorption of a material on polarization. The origin of the dichroism effect can be anisotropies in the charge or the spin in the material. In the latter case we speak of magnetic dichroism. Here we briefly discuss the principles and applications of magnetic dichroism techniques in the x-ray region, the X-Ray Magnetic Circular Dichroism (XMCD) and X-Ray Magnetic Linear Dichroism (XML D)

2

XMCD experimental station optimized for ultrathin magnetic films at HiSOR-BL14  

Science Conference Proceedings (OSTI)

We have constructed a system for in situ X-ray magnetic circular dichroism (XMCD) measurements of ultrathin magnetic films at the soft X-ray beamline HiSOR-BL14 at Hiroshima Synchrotron Radiation Center. The XMCD experimental station is directly connected to the beamline, and equipped with a sample fabrication chamber where various types of ultrathin magnetic films can be grown with monatomic layer control. XMCD spectra of the as-grown samples can be measured with adequate precision for the analysis of magnetic moments, under proper control of the light polarization in the beamline optics. This system has enabled the investigation of natural magnetic states in the ultrathin magnetic films without the influence of surface oxidation or any cap-layers.

Sawada, Masahiro; Namatame, Hirofumi [Hiroshima Synchrotron Radiation Center, Hiroshima University, 2-313 Kagamiyama, Higashi-Hirohisma, Hiroshima 739-0046 (Japan); Ueno, Tetsuro; Tagashira, Tetsuro [Graduate School of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-0046 (Japan); Taniguchi, Masaki [Hiroshima Synchrotron Radiation Center, Hiroshima University, 2-313 Kagamiyama, Higashi-Hirohisma, Hiroshima 739-0046 (Japan); Graduate School of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-0046 (Japan)

2010-06-23T23:59:59.000Z

3

Probing Strain-Induced Changes in Electronic Structure with XMCD  

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

Structure with XMCD Print Wednesday, 30 March 2011 00:00 The difference in the lattice constant of a substrate compared to a thin film deposited on top of it or a matrix...

4

Probing Strain-Induced Changes in Electronic Structure with XMCD  

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

Probing Strain-Induced Changes in Electronic Structure with XMCD Print Probing Strain-Induced Changes in Electronic Structure with XMCD Print The difference in the lattice constant of a substrate compared to a thin film deposited on top of it or a matrix compared to a nanocolumn embedded in it induces a lattice distortion-i.e., strain-in the nanostructure as compared to the bulk. The strong coupling of electronic properties with structural parameters in transition-metal oxides then allows tuning and ultimately controlling the physical characteristics of nanoarchitectures through strain. A research team from the UK and Berkeley has now demonstrated that soft x-ray magnetic circular dichroism (XMCD) techniques are uniquely suited to provide detailed information about the impact of strain on the electronic properties of magnetic oxide nanoarchitectures.

5

Probing Strain-Induced Changes in Electronic Structure with XMCD  

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

Probing Strain-Induced Changes in Electronic Structure with XMCD Print Probing Strain-Induced Changes in Electronic Structure with XMCD Print The difference in the lattice constant of a substrate compared to a thin film deposited on top of it or a matrix compared to a nanocolumn embedded in it induces a lattice distortion-i.e., strain-in the nanostructure as compared to the bulk. The strong coupling of electronic properties with structural parameters in transition-metal oxides then allows tuning and ultimately controlling the physical characteristics of nanoarchitectures through strain. A research team from the UK and Berkeley has now demonstrated that soft x-ray magnetic circular dichroism (XMCD) techniques are uniquely suited to provide detailed information about the impact of strain on the electronic properties of magnetic oxide nanoarchitectures.

6

Probing Strain-Induced Changes in Electronic Structure with XMCD  

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

Probing Strain-Induced Changes Probing Strain-Induced Changes in Electronic Structure with XMCD Probing Strain-Induced Changes in Electronic Structure with XMCD Print Wednesday, 30 March 2011 00:00 The difference in the lattice constant of a substrate compared to a thin film deposited on top of it or a matrix compared to a nanocolumn embedded in it induces a lattice distortion-i.e., strain-in the nanostructure as compared to the bulk. The strong coupling of electronic properties with structural parameters in transition-metal oxides then allows tuning and ultimately controlling the physical characteristics of nanoarchitectures through strain. A research team from the UK and Berkeley has now demonstrated that soft x-ray magnetic circular dichroism (XMCD) techniques are uniquely suited to provide detailed information about the impact of strain on the electronic properties of magnetic oxide nanoarchitectures.

7

Probing Strain-Induced Changes in Electronic Structure with XMCD  

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

Probing Strain-Induced Changes in Electronic Structure with XMCD Print Probing Strain-Induced Changes in Electronic Structure with XMCD Print The difference in the lattice constant of a substrate compared to a thin film deposited on top of it or a matrix compared to a nanocolumn embedded in it induces a lattice distortion-i.e., strain-in the nanostructure as compared to the bulk. The strong coupling of electronic properties with structural parameters in transition-metal oxides then allows tuning and ultimately controlling the physical characteristics of nanoarchitectures through strain. A research team from the UK and Berkeley has now demonstrated that soft x-ray magnetic circular dichroism (XMCD) techniques are uniquely suited to provide detailed information about the impact of strain on the electronic properties of magnetic oxide nanoarchitectures.

8

Iron site occupancies in magnetite-ulvospinel solid solution: A new approach using XMCD  

Science Conference Proceedings (OSTI)

Ordering of Fe{sup 3+} and Fe{sup 2+} between octahedral (Oh) and tetrahedral (Td) sites in synthetic members of the magnetite (Fe{sub 3}O{sub 4}) - ulvoespinel (Fe{sub 2}TiO{sub 4}) solid-solution series was determined using Fe L{sub 2,3}-edge X-ray magnetic circular dichroism (XMCD) coupled with electron microprobe and chemical analysis, Ti L-edge spectroscopy, Fe K-edge EXAFS and XANES, Fe{sub 57} Moessbauer spectroscopy, and unit cell parameters. Microprobe analysis, cell edges and chemical FeO determinations showed that the bulk compositions of the samples were stoichiometric magnetite-ulvoespinel solid-solutions. Surface sensitive XMCD showed that the surfaces of these oxide minerals were more sensitive to redox conditions and some samples required re-equilibration with suitable solid-solid buffers. Detailed site-occupancy analysis of these samples gave XMCD-Fe{sup 2+}/Fe{sup 3+} ratios very close to stoichiometric values. L{sub 2,3}-edge spectroscopy showed that Ti{sup 4+} was restricted to Oh sites. XMCD results showed that significant Fe{sup 2+} only entered Td when the Ti content was > 0.40 apfu while Fe{sup 2+} in Oh increased from 1 a.p.f.u in magnetite to a maximum of {approx}1.4 apfu in USP45. As the Ti content increased from this point, the steady increase in Fe{sup 2+} in Td sites was clearly observable in the XMCD spectra, concurrent with a slow decrease in Fe{sup 2+} in Oh sites. Calculated magnetic moments showed a steady decrease from magnetite (4.06 {mu}{sub B}) to USP45 (1.5 {mu}{sub B}) and then a slower decrease towards the value for ulvoespinel (0 {mu}{sub B}). Two of the synthesized samples were also partially maghemitized by re-equilibrating with an oxidizing Ni-NiO buffer and XMCD showed that Fe{sup 2+} oxidation only occurred at Oh sites, with concomitant vacancy formation restricted to this site. This study shows the advantage of using XMCD as a direct measurement of Fe oxidation state in these complex magnetic spinels. These results can be used to rationalize the magnetic properties of titanomagnetites, and their oxidized titanomaghemitized analogues, in Earth's crustal rocks.

Pearce, C. I.; Henderson, C. M. B.; Telling, N. D.; Pattrick, R. A.D.; Vaughan, D. J.; Charnock, J. M.; Arenholz, E.; Tuna, F.; Coker, V.S.; Laan, G. van der

2009-06-22T23:59:59.000Z

9

Exposure chamber  

DOE Patents (OSTI)

A chamber for exposing animals, plants, or materials to air containing gases or aerosols is so constructed that catch pans for animal excrement, for example, serve to aid the uniform distribution of air throughout the chamber instead of constituting obstacles as has been the case in prior animal exposure chambers. The chamber comprises the usual imperforate top, bottom and side walls. Within the chamber, cages and their associated pans are arranged in two columns. The pans are spaced horizontally from the walls of the chamber in all directions. Corresponding pans of the two columns are also spaced horizontally from each other. Preferably the pans of one column are also spaced vertically from corresponding pans of the other column. Air is introduced into the top of the chamber and withdrawn from the bottom. The general flow of air is therefore vertical. The effect of the horizontal pans is based on the fact that a gas flowing past the edge of a flat plate that is perpendicular to the flow forms a wave on the upstream side of the plate. Air flows downwardly between the chamber walls and the outer edges of the pan. It also flows downwardly between the inner edges of the pans of the two columns. It has been found that when the air carries aerosol particles, these particles are substantially uniformly distributed throughout the chamber.

Moss, Owen R. (Kennewick, WA)

1980-01-01T23:59:59.000Z

10

Wire chamber  

DOE Patents (OSTI)

A wire chamber or proportional counter device, such as Geiger-Mueller tube or drift chamber, improved with a gas mixture providing a stable drift velocity while eliminating wire aging caused by prior art gas mixtures. The new gas mixture is comprised of equal parts argon and ethane gas and having approximately 0.25% isopropyl alcohol vapor.

Atac, Muzaffer (Wheaton, IL)

1989-01-01T23:59:59.000Z

11

IONIZATION CHAMBER  

DOE Patents (OSTI)

This patent describes a novel ionization chamber which is well suited to measuring the radioactivity of the various portions of a wire as the wire is moved at a uniform speed, in order to produce the neutron flux traverse pattern of a reactor in which the wire was previously exposed to neutron radiation. The ionization chamber of the present invention is characterized by the construction wherein the wire is passed through a tubular, straight electrode and radiation shielding material is disposed along the wire except at an intermediate, narrow area where the second electrode of the chamber is located.

Redman, W.C.; Shonka, F.R.

1958-02-18T23:59:59.000Z

12

Ionization chamber  

DOE Patents (OSTI)

An ionization chamber has separate drift and detection regions electrically isolated from each other by a fine wire grid. A relatively weak electric field can be maintained in the drift region when the grid and another electrode in the chamber are connected to a high voltage source. A much stronger electric field can be provided in the detection region by connecting wire electrodes therein to another high voltage source. The detection region can thus be operated in a proportional mode when a suitable gas is contained in the chamber. High resolution output pulse waveforms are provided across a resistor connected to the detection region anode, after ionizing radiation enters the drift region and ionize the gas.

Walenta, Albert H. (Port Jefferson Station, NY)

1981-01-01T23:59:59.000Z

13

Chamber propagation  

SciTech Connect

Propagation of a heavy ion beam to the target appears possible under conditions thought to be realizable by several reactor designs. Beam quality at the lens is believed to provide adequate intensity at the target -- but the beam must pass through chamber debris and its self fields along the way. This paper reviews present consensus on propagation modes and presents recent results on the effects of photoionization of the beam ions by thermal x-rays from the heated target. Ballistic propagation through very low densities is a conservative mode. The more-speculative self-pinched mode, at 1 to 10 Torr, offers reactor advantages and is being re-examined by others. 13 refs.

Langdon, B.

1991-01-16T23:59:59.000Z

14

Glossary Term - Cloud Chamber  

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

Ceres Previous Term (Ceres) Glossary Main Index Next Term (Composition of the Earth's Atmosphere) Composition of the
Earth's Atmosphere Cloud Chamber A cloud chamber showing the...

15

Performance comparison of CNFET- and CMOS-based 6T SRAM cell in deep submicron  

Science Conference Proceedings (OSTI)

This paper presents a performance comparison of a carbon nanotube-based field effect (CNFET)- and CMOS-based 6T SRAM cell at the 32nm technology node. HSPICE simulations, carried out using Berkeley predictive technology model (BPTM), show that for a ... Keywords: CNFET, Carbon nanotubes, Deep submicron, Nanoelectronics, SRAM

A. K. Kureshi; Mohd. Hasan

2009-06-01T23:59:59.000Z

16

Hupmobile cloud chamber parameters  

SciTech Connect

The accompanying table lists the presently selected parameters for the twelve cloud chambers. The chambers are numbered consecutively from 4 through 15 as they are lined up in the bunker. The lowest number is closest to the source. All except the first chamber have some thin metal filters to attenuate the flux and harden the spectrum. Cloud chambers 10, 12, and 14 are shielded by a collimator with about 200 pinholes in it. The flux in these chambers is attenuated by the ratio of the pinhole area to total beam area which is a factor of 50. Various gases and gas pressures are used to obtain suitable track lengths and interaction cross sections. Neon, argon, and krypton are used to obtain photo electrons. Hydrogen is used to obtain Compton electrons.

Hansen, N. E.

1967-09-28T23:59:59.000Z

17

The Environmental Chamber  

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

2 2 The Environmental Chamber Al Hodgson and Richard Allen test methyl chloride exposures using the environmental chamber. On the second floor of an unremarkable building at LBL, researchers are using a room within a room to smoke out indoor air pollutants. The environmental chamber is a stainless-steel-lined room of 540 ft cubed (20 meters cubed) which can be operated in several ways to meet the needs of different research projects, including studies for which a very low background is required. Scientists of the Indoor Environment Program and their collaborators use the chamber as a controlled indoor environment to study the behavior of a variety of indoor pollutants ranging from cigarette smoke to volatile organic compounds (VOCs) from new carpets. At the moment, four projects use the facility. Principal investigator Al

18

Sleeve reaction chamber system  

DOE Patents (OSTI)

A chemical reaction chamber system that combines devices such as doped polysilicon for heating, bulk silicon for convective cooling, and thermoelectric (TE) coolers to augment the heating and cooling rates of the reaction chamber or chambers. In addition the system includes non-silicon-based reaction chambers such as any high thermal conductivity material used in combination with a thermoelectric cooling mechanism (i.e., Peltier device). The heat contained in the thermally conductive part of the system can be used/reused to heat the device, thereby conserving energy and expediting the heating/cooling rates. The system combines a micromachined silicon reaction chamber, for example, with an additional module/device for augmented heating/cooling using the Peltier effect. This additional module is particularly useful in extreme environments (very hot or extremely cold) where augmented heating/cooling would be useful to speed up the thermal cycling rates. The chemical reaction chamber system has various applications for synthesis or processing of organic, inorganic, or biochemical reactions, including the polymerase chain reaction (PCR) and/or other DNA reactions, such as the ligase chain reaction.

Northrup, M. Allen (Berkeley, CA); Beeman, Barton V. (San Mateo, CA); Benett, William J. (Livermore, CA); Hadley, Dean R. (Manteca, CA); Landre, Phoebe (Livermore, CA); Lehew, Stacy L. (Livermore, CA); Krulevitch, Peter A. (Pleasanton, CA)

2009-08-25T23:59:59.000Z

19

Complete genome sequence of Hydrogenobacter thermophilus type strain (TK-6T)  

DOE Green Energy (OSTI)

Hydrogenobacter thermophilus Kawasumi et al. 1984 is the type species of the genus Hydrogenobacter. H. thermophilus was the first obligate autotrophic organism reported among aerobic hydrogen-oxidizing bacteria. Strain TK-6T is of interest because of the unusually efficient hydrogen-oxidizing ability of this strain, which results in a faster generation time compared to other autotrophs. It is also able to grow anaerobically using nitrate as an electron acceptor when molecular hydrogen is used as the energy source, and able to aerobically fix CO2 via the reductive tricarboxylic acid cycle. This is the fifth completed genome sequence in the family Aquificaceae, and the second genome sequence determined from a strain derived from the original isolate. Here we describe the features of this organism, together with the complete genome sequence and annotation. The 1,742,932 bp long genome with its 1,899 protein-coding and 49 RNA genes is a part of the Genomic Encyclopedia of Bacteria and Archaea project.

Zeytun, Ahmet [Los Alamos National Laboratory (LANL); Sikorski, Johannes [DSMZ - German Collection of Microorganisms and Cell Cultures GmbH, Braunschweig, Germany; Nolan, Matt [Joint Genome Institute, Walnut Creek, California; Lapidus, Alla L. [Joint Genome Institute, Walnut Creek, California; Lucas, Susan [Joint Genome Institute, Walnut Creek, California; Han, James [Joint Genome Institute; Tice, Hope [Joint Genome Institute, Walnut Creek, California; Cheng, Jan-Fang [Joint Genome Institute, Walnut Creek, California; Tapia, Roxanne [Los Alamos National Laboratory (LANL); Goodwin, Lynne A. [Los Alamos National Laboratory (LANL); Pitluck, Sam [Joint Genome Institute, Walnut Creek, California; Liolios, Konstantinos [Joint Genome Institute, Walnut Creek, California; Ivanova, N [U.S. Department of Energy, Joint Genome Institute; Mavromatis, K [U.S. Department of Energy, Joint Genome Institute; Mikhailova, Natalia [U.S. Department of Energy, Joint Genome Institute; Ovchinnikova, Galina [U.S. Department of Energy, Joint Genome Institute; Pati, Amrita [U.S. Department of Energy, Joint Genome Institute; Chen, Amy [Joint Genome Institute, Walnut Creek, California; Palaniappan, Krishna [Joint Genome Institute, Walnut Creek, California; Ngatchou, Olivier Duplex [HZI - Helmholtz Centre for Infection Research, Braunschweig, Germany; Land, Miriam L [ORNL; Hauser, Loren John [ORNL; Chang, Yun-Juan [ORNL; Jeffries, Cynthia [Oak Ridge National Laboratory (ORNL); Han, Cliff [Los Alamos National Laboratory (LANL); Detter, J. Chris [Joint Genome Institute, Walnut Creek, California; Ubler, Susanne [Universitat Regensburg, Regensburg, Germany; Rohde, Manfred [HZI - Helmholtz Centre for Infection Research, Braunschweig, Germany; Tindall, Brian [DSMZ - German Collection of Microorganisms and Cell Cultures GmbH, Braunschweig, Germany; Wirth, Reinhard [Universitat Regensburg, Regensburg, Germany; Woyke, Tanja [Joint Genome Institute, Walnut Creek, California; Bristow, James [Joint Genome Institute, Walnut Creek, California; Eisen, Jonathan [Joint Genome Institute, Walnut Creek, California; Markowitz, Victor [Joint Genome Institute, Walnut Creek, California; Hugenholtz, Philip [U.S. Department of Energy, Joint Genome Institute; Klenk, Hans-Peter [DSMZ - German Collection of Microorganisms and Cell Cultures GmbH, Braunschweig, Germany; Kyrpides, Nikos C [Joint Genome Institute, Walnut Creek, California

2011-01-01T23:59:59.000Z

20

Photo of Spray Combustion Chamber  

Science Conference Proceedings (OSTI)

NIST Spray Combustion Chamber. NIST, National Institute of Standards and Technology, Material Measurement Laboratory, ...

2013-07-15T23:59:59.000Z

Note: This page contains sample records for the topic "xmcd chamber 6t" 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

Improved wire chamber  

DOE Patents (OSTI)

An improved gas mixture for use with proportional counter devices, such as Geiger-Mueller tubes and drift chambers. The improved gas mixture provides a stable drift velocity while eliminating wire aging caused by prior art gas mixtures. The new gas mixture is comprised of equal parts argon and ethane gas and having approximately 0.25% isopropyl alcohol vapor. 2 figs.

Atac, M.

1987-05-12T23:59:59.000Z

22

Multi-chamber deposition system  

DOE Patents (OSTI)

A system for the simultaneous deposition of different coatings onto a thin web within a large volume vacuum chamber is disclosed which chamber is provided with a plurality of deposition chambers in which the different layers are deposited onto the film as its moves from a supply roll to a finished take-up roll of coated web. The deposition chambers provided within the large vacuum chamber are provided with separate seals which minimize back diffusion of any dopant gas from adjacent deposition chambers.

Jacobson, Richard L. (Roseville, MN); Jeffrey, Frank R. (Shoreview, MN); Westerberg, Roger K. (Cottage Grove, MN)

1989-10-17T23:59:59.000Z

23

Multi-chamber deposition system  

DOE Patents (OSTI)

A system for the simultaneous deposition of different coatings onto a thin web within a large volume vacuum chamber is disclosed which chamber is provided with a plurality of deposition chambers in which the different layers are deposited onto the film as its moves from a supply roll to a finished take-up roll of coated web. The deposition chambers provided within the large vacuum chamber are provided with separate seals which minimize back diffusion of any dopant gas from adjacent deposition chambers.

Jacobson, Richard L. (Roseville, MN); Jeffrey, Frank R. (Shoreview, MN); Westerberg, Roger K. (Cottage Grove, MN)

1989-06-27T23:59:59.000Z

24

Three chamber negative ion source  

DOE Patents (OSTI)

A negative ion vessel is divided into an excitation chamber, a negative ionization chamber and an extraction chamber by two magnetic filters. Input means introduces neutral molecules into a first chamber where a first electron discharge means vibrationally excites the molecules which migrate to a second chamber. In the second chamber a second electron discharge means ionizes the molecules, producing negative ions which are extracted into or by a third chamber. A first magnetic filter prevents high energy electrons from entering the negative ionization chamber from the excitation chamber. A second magnetic filter prevents high energy electrons from entering the extraction chamber from the negative ionizing chamber. An extraction grid at the end of the negative ion vessel attracts negative ions into the third chamber and accelerates them. Another grid, located adjacent to the extraction grid, carries a small positive voltage in order to inhibit positive ions from migrating into the extraction chamber and contour the plasma potential. Additional electrons can be suppressed from the output flux using ExB forces provided by magnetic field means and the extractor grid electric potential.

Leung, Ka-Ngo (Hercules, CA); Ehlers, Kenneth W. (Alamo, CA); Hiskes, John R. (Livermore, CA)

1985-01-01T23:59:59.000Z

25

CONTINUOUSLY SENSITIVE BUBBLE CHAMBER  

DOE Patents (OSTI)

A radiation detector of the bubble chamber class is described which is continuously sensitive and which does not require the complex pressure cycling equipment characteristic of prior forms of the chamber. The radiation sensitive element is a gas-saturated liquid and means are provided for establishing a thermal gradient across a region of the liquid. The gradient has a temperature range including both the saturation temperature of the liquid and more elevated temperatures. Thus a supersaturated zone is created in which ionizing radiations may give rise to visible gas bubbles indicative of the passage of the radiation through the liquid. Additional means are provided for replenishing the supply of gas-saturated liquid to maintaincontinuous sensitivity.

Good, R.H.

1959-08-18T23:59:59.000Z

26

Argus target chamber  

SciTech Connect

A target chamber for application in the laser fusion program must satisfy some very basic requirements. (1) Provide a vacuum on the order of 10$sup -6$ torr. (2) Support a microscopically small target in a fixed point in space and verify its location within 5 micrometers. (3) Contain an adjustable beam focusing system capable of delivering a number of laser beams onto the target simultaneously, both in time and space. (4) Provide access for diagnostics to evaluate the results of target irradiation. (5) Have flexibility to allow changes in targets, focusing optics and number of beams. The ARGUS laser which is now under construction at LLL will have a target chamber which meets these requirements in a simple economic manner. The chamber and auxiliary equipment are described, with reference to two double beam focusing systems; namely, lenses and ellipsoidal mirrors. Provision is made for future operation with four beams, using ellipsoidal mirrors for two-sided illumination and lens systems for tetragonal and tetrahedral irradiation. (auth)

Rienecker, F. Jr.; Glaros, S.S.; Kobierecki, M.

1975-11-12T23:59:59.000Z

27

Vertical two chamber reaction furnace  

DOE Patents (OSTI)

A vertical two chamber reaction furnace is disclosed. The furnace comprises a lower chamber having an independently operable first heating means for heating the lower chamber and a gas inlet means for admitting a gas to create an ambient atmosphere, and an upper chamber disposed above the lower chamber and having an independently operable second heating means for heating the upper chamber. Disposed between the lower chamber and the upper chamber is a vapor permeable diffusion partition. The upper chamber has a conveyor means for conveying a reactant there through. Of particular importance is the thallinating of long-length thallium-barium-calcium copper oxide (TBCCO) or barium-calcium-copper oxide (BCCO) precursor tapes or wires conveyed through the upper chamber to thereby effectuate the deposition of vaporized thallium (being so vaporized as the first reactant in the lower chamber at a temperature between about 700 and 800 C) on TBCCO or BCCO tape or wire (the second reactant) at its simultaneous annealing temperature in the upper chamber of about 800 to 950 C to thereby replace thallium oxide lost from TBCCO tape or wire because of the high annealing temperature or to deposit thallium on BCCO tape or wire. Continuously moving the tape or wire provides a single-step process that effectuates production of long-length TBCCO superconducting product. 2 figs.

Blaugher, R.D.

1999-03-16T23:59:59.000Z

28

Multi-anode ionization chamber  

DOE Patents (OSTI)

The present invention includes a high-energy detector having a cathode chamber, a support member, and anode segments. The cathode chamber extends along a longitudinal axis. The support member is fixed within the cathode chamber and extends from the first end of the cathode chamber to the second end of the cathode chamber. The anode segments are supported by the support member and are spaced along the longitudinal surface of the support member. The anode segments are configured to generate at least a first electrical signal in response to electrons impinging thereon.

Bolotnikov, Aleksey E. (South Setauket, NY); Smith, Graham (Port Jefferson, NY); Mahler, George J. (Rocky Point, NY); Vanier, Peter E. (Setauket, NY)

2010-12-28T23:59:59.000Z

29

HVAC&R Equipment Environmental Chambers  

Science Conference Proceedings (OSTI)

... with relative humidity controlled within 2 %. Small Appliance and Refrigerator Chamber. This chamber is used to test small ...

2011-11-15T23:59:59.000Z

30

A MODIFIED LUNDEGARDH SPRAY CHAMBER  

SciTech Connect

Operation of an apparatus for analysis of solutions by the Lundegardh flame technique was greatiy facilituted by the modification of a spray chamber. Samples can be introduced and removed from the modified spray chamber without extinguishing the flame or dismantling the assembly. (auth)

Palin, P.C.

1951-04-01T23:59:59.000Z

31

LRL 25-inch Bubble Chamber  

DOE R&D Accomplishments (OSTI)

The recently completed 25-inch hydrogen bubble chamber combines excellent picture quality with a fast operating cycle. The chamber has a unique optical system and is designed to take several pictures each Bevatron pulse, in conjunction with the Bevatron rapid beam ejection system.

Alvarez, L. W.; Gow, J. D.; Barrera, F.; Eckman, G.; Shand, J.; Watt, R.; Norgren, D.; Hernandez, H. P.

1964-07-08T23:59:59.000Z

32

National Ignition Facility Target Chamber  

DOE Green Energy (OSTI)

On June 11, 1999 the Department of Energy dedicated the single largest piece of the National Ignition Facility (NIF) at Lawrence Livermore National Laboratory (LLNL) in Livermore, California. The ten (10) meter diameter aluminum target high vacuum chamber will serve as the working end of the largest laser in the world. The output of 192 laser beams will converge at the precise center of the chamber. The laser beams will enter the chamber in two by two arrays to illuminate 10 millimeter long gold cylinders called hohlraums enclosing 2 millimeter capsule containing deuterium, tritium and isotopes of hydrogen. The two isotopes will fuse, thereby creating temperatures and pressures resembling those found only inside stars and in detonated nuclear weapons, but on a minute scale. The NIF Project will serve as an essential facility to insure safety and reliability of our nation's nuclear arsenal as well as demonstrating inertial fusion's contribution to creating electrical power. The paper will discuss the requirements that had to be addressed during the design, fabrication and testing of the target chamber. A team from Sandia National Laboratories (SNL) and LLNL with input from industry performed the configuration and basic design of the target chamber. The method of fabrication and construction of the aluminum target chamber was devised by Pitt-Des Moines, Inc. (PDM). PDM also participated in the design of the chamber in areas such as the Target Chamber Realignment and Adjustment System, which would allow realignment of the sphere laser beams in the event of earth settlement or movement from a seismic event. During the fabrication of the target chamber the sphericity tolerances had to be addressed for the individual plates. Procedures were developed for forming, edge preparation and welding of individual plates. Construction plans were developed to allow the field construction of the target chamber to occur parallel to other NIF construction activities. This was necessary to achieve the overall schedule. Plans had to be developed for the precise location and alignment of laser beam ports. Upon completion of the fabrication of the aluminum target chamber in a temporary structure the 130 ton sphere was moved from the temporary construction enclosure to its final location in the target building. Prior to the installation of a concrete shield and after completion of the welding of the chamber penetrations vacuum leak checking was performed to insure the vacuum integrity of target chamber. The entire spherical chamber external surface supports a 40 cm thick reinforced concrete shield after installation in the target building. The final task is a total survey of the laser ports and the contour machining of spacer plates so that laser devices attached to these ports meet the alignment criteria.

Wavrik, R W; Cox, J R; Fleming, P J

2000-10-05T23:59:59.000Z

33

Humidity effects in ionization chambers  

SciTech Connect

Capacitance variations due to humidity alterations have been suggested as the cause of ionization chamber current variations. The validity of the arguments is seriously questioned on several points. (auth)

Bengtsson, L.G.

1973-01-01T23:59:59.000Z

34

Light diffusing fiber optic chamber  

DOE Patents (OSTI)

A light diffusion system for transmitting light to a target area. The light is transmitted in a direction from a proximal end to a distal end by an optical fiber. A diffusing chamber is operatively connected to the optical fiber for transmitting the light from the proximal end to the distal end and transmitting said light to said target area. A plug is operatively connected to the diffusing chamber for increasing the light that is transmitted to the target area.

Maitland, Duncan J. (Lafayette, CA)

2002-01-01T23:59:59.000Z

35

Plasma chemistry in wire chambers  

SciTech Connect

The phenomenology of wire chamber aging is discussed and fundamentals of proportional counters are presented. Free-radical polymerization and plasma polymerization are discussed. The chemistry of wire aging is reviewed. Similarities between wire chamber plasma (>1 atm dc-discharge) and low-pressure rf-discharge plasmas, which have been more widely studied, are suggested. Construction and use of a system to allow study of the plasma reactions occurring in wire chambers is reported. A proportional tube irradiated by an {sup 55}Fe source is used as a model wire chamber. Condensable species in the proportional tube effluent are concentrated in a cryotrap and analyzed by gas chromatography/mass spectrometry. Several different wire chamber gases (methane, argon/methane, ethane, argon/ethane, propane, argon/isobutane) are tested and their reaction products qualitatively identified. For all gases tested except those containing methane, use of hygroscopic filters to remove trace water and oxygen contaminants from the gas resulted in an increase in the average molecular weight of the products, consistent with results from low-pressure rf-discharge plasmas. It is suggested that because water and oxygen inhibit polymer growth in the gas phase that they may also reduce polymer deposition in proportional tubes and therefore retard wire aging processes. Mechanistic implications of the plasma reactions of hydrocarbons with oxygen are suggested. Unresolved issues in this work and proposals for further study are discussed.

Wise, J.

1990-05-01T23:59:59.000Z

36

The TESLA Time Projection Chamber  

E-Print Network (OSTI)

A large Time Projection Chamber is proposed as part of the tracking system for a detector at the TESLA electron positron linear collider. Different ongoing R&D studies are reviewed, stressing progress made on a new type readout technique based on Micro-Pattern Gas Detectors.

Nabil Ghodbane

2002-12-12T23:59:59.000Z

37

AN IONIZATION CHAMBER LAUNDRY MONITOR  

SciTech Connect

The determination of the amount of contamination remaining on a garment after it has been washed is an important part of hot laundry operations. In the past garments were monitored by measuring the contamination concentrated in the crotch with a GM tube probe. This type of spot check does not detect any isolated hot spots on other pants of the garment. To monitor the entire garment with a GM tube instrument is excessively time consuming for a large number of garments. To overcome these difficulties a sensitive, large-volume ionization chamber was constructed. It is rectangular in shape, 5 ft high by 2 1/2 ft wide by 4 in. deep. The center electrode is of a grid type and is mounted halfway between the front window and the back of the chamber. In a 0.5-mr/hr field, 180 v is sufficient to saturate toe chamber. In order to insure beta sensitivity, the front window has an equivalent thickness of approximately 7 mg/cm/sup 2/. The measuring device is a line-operated electrometer circuit equipped with an alarm that may be set at the rejection limit for the type of garment being monitored. A fullscale deflection on the most sensitive range is given by 2 to 3 mu C of liquid mixed fission products deposited on a garment. Since the chamber monitors the entire garment, the results are independent of the location of the contarnination. In practice, garments may be monitored at the rate of 7 per min, while only 3 per min may be completely checked with a GM tube probs. Field tests indicate that this instrument is stable and trouble free. Background causes a meter deflection of about 20 divisions, which is low enough to give reliable accuracy for monitoring garments. (auth)

Chester, J.D.; Handloser, J.S.

1958-06-01T23:59:59.000Z

38

Chamber Comments on Cybersecurity Green Paper Final  

Science Conference Proceedings (OSTI)

... Using security disclosure as an incentive, its authors ... The Chamber noted that incentives would prove more productive than regulation. ...

2011-08-19T23:59:59.000Z

39

Noise Analysis of Statham Temperature Chamber  

SciTech Connect

A procedure is described to subdue the noise made by the LN2 control valve on a Statham Temperature Chamber.

Mielke, R. L.

1973-01-15T23:59:59.000Z

40

Georges Charpak, Particle Detectors, and Multiwire Chambers  

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

Georges Charpak, Particle Detectors, and Multiwire Chambers Georges Charpak, Particle Detectors, and Multiwire Chambers Resources with Additional Information · Patents Georges Charpak Courtesy of CERN Nobel laureate Georges Charpak [was] a pioneer in the art and science of particle detection ... . [He] developed a host of particle detectors used throughout experimental particle physics. In 1968, he invented and developed the first multiwire proportional chamber, for which he won the [Physics] Nobel Prize in 1992 ... . The multiwire chamber differed from earlier detectors in the speed with which it could record particle tracks from a collision-millions per second, rather than one or two per second for bubble chambers. The speed of the multiwire chamber and its successor technologies, along with their extraordinary precision, led to a revolution in particle physics ... . The technology that Charpak pioneered also finds applications in medicine and industry.

Note: This page contains sample records for the topic "xmcd chamber 6t" 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

Fluidized wall for protecting fusion chamber walls  

DOE Patents (OSTI)

Apparatus for protecting the inner wall of a fusion chamber from microexplosion debris, x-rays, neutrons, etc. produced by deuterium-tritium (DT) targets imploded within the fusion chamber. The apparatus utilizes a fluidized wall similar to a waterfall comprising liquid lithium or solid pellets of lithium-ceramic, the waterfall forming a blanket to prevent damage of the structural materials of the chamber.

Maniscalco, James A. (Danville, CA); Meier, Wayne R. (Livermore, CA)

1982-01-01T23:59:59.000Z

42

Insitu Oxygen Conduction Into Internal Combustion Chamber  

Insitu Oxygen Conduction Into Internal Combustion Chamber Note: The technology described above is an early stage opportunity. Licensing rights to this ...

43

The Mark II Vertex Drift Chamber  

SciTech Connect

We have completed constructing and begun operating the Mark II Drift Chamber Vertex Detector. The chamber, based on a modified jet cell design, achieves 30 {mu}m spatial resolution and <1000 {mu}m track-pair resolution in pressurized CO{sub 2} gas mixtures. Special emphasis has been placed on controlling systematic errors including the use of novel construction techniques which permit accurate wire placement. Chamber performance has been studied with cosmic ray tracks collected with the chamber located both inside and outside the Mark II. Results on spatial resolution, average pulse shape, and some properties of CO{sub 2} mixtures are presented. 10 refs., 12 figs., 1 tab.

Alexander, J.P.; Baggs, R.; Fujino, D.; Hayes, K.; Hoard, C.; Hower, N.; Hutchinson, D.; Jaros, J.A.; Koetke, D.; Kowalski, L.A.

1989-03-01T23:59:59.000Z

44

IFE Chamber Technology Testing Program In NIF and Chamber Development Test Plan Mohamed A. Abdou  

E-Print Network (OSTI)

IFE Chamber Technology Testing Program In NIF and Chamber Development Test Plan Mohamed A. Abdou chamber technology testing program in NIF involoving: criteria for evaluation prior to NIF testing were addressed in this paper. In order to maximize the benefits of testing program

Abdou, Mohamed

45

Ionization-chamber smoke detector system  

DOE Patents (OSTI)

This invention relates to an improved smoke-detection system of the ionization-chamber type. In the preferred embodiment, the system utilizes a conventional detector head comprising a measuring ionization chamber, a reference ionization chamber, and a normally non-conductive gas triode for discharging when a threshold concentration of airborne particulates is present in the measuring chamber. The improved system is designed to reduce false alarms caused by fluctuations in ambient temperature. Means are provided for periodically firing the gas discharge triode and each time recording the triggering voltage required. A computer compares each triggering voltage with its predecessor. The computer is programmed to energize an alarm if the difference between the two compared voltages is a relatively large value indicative of particulates in the measuring chamber and to disregard smaller differences typically resulting from changes in ambient temperature.

Roe, Robert F. (Jackson, OH)

1976-10-19T23:59:59.000Z

46

RADIATION MONITOR CONTAINING TWO CONCENTRIC IONIZATION CHAMBERS AND MEANS FOR INSULATING THE SEPARATE CHAMBERS  

DOE Patents (OSTI)

This invention relates to a portable radiation monitor containing two concentric ionization chambers which permit the use of standard charging and reading devices. It is particularly adapted as a personnel x-ray dosimeter and to this end comprises a small thin walled, cylindrical conductor forming an inner energy dependent chamber, a small thin walled, cylindrical conductor forming an outer energy independent chamber, and polymeric insulation means which insulates said chambers from each other and holds the chambers together with exposed connections in a simple, trouble-free, and compact assembly substantially without variation in directional response. (AEC)

Braestrup, C.B.; Mooney, R.T.

1964-01-21T23:59:59.000Z

47

Commissioning of SLAC SLD 45-Degree Chambers  

E-Print Network (OSTI)

The SLD experiment at the Stanford Linear Accelerator Center had a significant gap in its muon tracking coverage, provided by the Warm Iron Calorimeter. Supplemental planes of limited streamer tube chambers were added to improve the coverage in the vicinity of the gap at 0.65 commissioning of the forty-five degree chamber region of the SLAC SLD Warm Iron Calorimeter is presented. This task involved the completion of the forty-five degree chamber region geometry for the Warm Iron Calorimeter's fitter and swimmer and the changing of the way multiple scattering effects are treated in the fitter algorithm.

V. O. Eschenburg

2002-07-30T23:59:59.000Z

48

A TIME PROJECTION CHAMBER DIGITIZER TEST SYSTEM USING A MICROCOMPUTER  

E-Print Network (OSTI)

R. Nygren, "The Time Projection Chamber", Physics Today, pp.out System for the Time Projection Chamber", IEEE Trans.on Nuclear Science A TIME PROJECTION CHAMBER DIGITIZER TEST

Nunnally, Curtis

2013-01-01T23:59:59.000Z

49

Very high intensity reaction chamber design  

SciTech Connect

The problem of achieving very high intensity irradiation by light in minimal regions was studied. Three types of irradiation chamber are suggested: the common laser-reaction chamber, the folded concentric or near-concentric resonator, and the asymmetric confocal resonator. In all designs the ratio of high-intensity illuminated volume to other volume is highly dependent (to the $sup 3$/$sub 2$ power) on the power and fluence tolerances of optical elements, primarily mirrors. Optimization of energy coupling is discussed for the common cavity. For the concentric cavities, optimization for both coherent and incoherent beams is treated. Formulae and numerical examples give the size of chambers, aspect ratios, maximum pass number, image sizes, fluences, and the like. Similarly for the asymmetric confocal chamber, formulae and numerical examples for fluences, dimensions, losses, and totally contained pass numbers are given. (auth)

Devaney, J.J.

1975-09-01T23:59:59.000Z

50

Searches for charmed particles using bubble chambers  

SciTech Connect

Searches for charm particle production using bubble chambers are summarized. These searches depend on the detection of neutral strange particles. Upper limits are given for the different charmed mass regions and methods of search. (auth)

Harris, R.

1975-10-01T23:59:59.000Z

51

Automated Soil Gas Monitoring Chamber - Oak Ridge National ...  

Automated Soil Gas Monitoring Chamber ... A chamber for trapping soil gases as they evolve from the soil without disturbance to the soil and to the natural

52

The BaBar Drift Chamber  

E-Print Network (OSTI)

The central drift chamber for the BaBar detector at the PEP-II B-factory at SLAC is a cylindrical chamber with a length of 280 cm and outer radius of 81 cm. It consists of 40 layers of small hexagonal cells arranged in 10 axial and stereo super-layers. In order to minimize multiple scattering, light materials are used for the mechanical structure, and the gas mixture is Helium based. The pulse-height and timing electronics are mounted directly on the chamber rear end-plate. A full length prototype of the BaBar drift chamber has been built. The analysis of cosmic ray events measures the spatial resolution averaged in the cell to be 130 m and the dE/dx resolution to be 6.8%, meeting the performance goals for the BaBar central tracker. The mechanical assembly and stringing of the chamber was completed in December 1997 and the detector will be integrated into BaBar during summer 1998. 1

G. Sciolla

1998-01-01T23:59:59.000Z

53

Amplifier Design for Proportional Ionization Chambers  

SciTech Connect

This paper presents the requirements of a nuclear amplifier of short resolving time, designed to accept pulses of widely varying amplitudes. Data are given which show that a proportional ionization chamber loaded with a 1,000-ohm resistor develops pulses of 0.5 microsecond duration and several volts amplitude. Results indicate that seven basic requirements are imposed on the amplifier when counting soft beta and gamma radiation in the presence of alpha particles, without absorbers. It should, (1) have a fast recovery time, (2) have a relatively good low frequency response, (3) accept pulses of widely varying heights without developing spurious pulsed, (4) have a limiting output stage, (5) preserve the inherently short rise time of the chamber, (6) minimize pulse integration, and (7) have sufficient gain to detect the weak pulses well below the chamber voltage at which continuous discharge takes place. The results obtained with an amplifier which meets these requirements is described. A formula is derived which indicates that redesign of the proportional ionization chamber might eliminate the need for an amplifier. This may be possible if the radioactive particles are collimated parallel to the collecting electrode.

Baker, W. H.

1950-08-24T23:59:59.000Z

54

Miniature reaction chamber and devices incorporating same  

DOE Patents (OSTI)

The present invention generally relates to miniaturized devices for carrying out and controlling chemical reactions and analyses. In particular, the present invention provides devices which have miniature temperature controlled reaction chambers for carrying out a variety of synthetic and diagnostic applications, such as PCR amplification, nucleic acid hybridization, chemical labeling, nucleic acid fragmentation and the like.

Mathies, Richard A. (Moraga, CA); Woolley, Adam T. (Albany, CA)

2000-10-17T23:59:59.000Z

55

Development of bakelite based Resistive Plate Chambers  

E-Print Network (OSTI)

A Comparative study has been performed on Resistive Plate Chambers made of different grades of bakelite paper laminates, produced and commercially available in India. The chambers, operated in the streamer mode using argon : tetrafluroethane : isobutane in 34:59:7 mixing ratio, are tested with cosmic rays for the efficiency and the stability with cosmic rays. A particular grade of bakelite (P-120, NEMA LI-1989 Grade XXX), used for high voltage insulation in humid conditions, was found to give satisfactory performance with stable efficiency of > 96% continuously for more than 110 days. A silicone treatment of the inner surfaces of the bakelite RPC is found to be necessary for operation of the detector.

S. Biswas; S. Bhattacharya; S. Bose; S. Chattopadhyay; S. Saha; M. K. Sharan; Y. P. Viyogi

2008-02-20T23:59:59.000Z

56

ILLUMINATION OF 80-INCH BUBBLE CHAMBER  

SciTech Connect

A cylindrical condensing system whose geometry allows light to be collected along the length of narrow tubular sources and to pass through a restricted port area is used. The quantity of light collected is many times that possible to obtain with axially symmetric lenses. The optical arrangement is described. Other unique features include the use of plano reilectors to extend optically the flash tube and condenser lengths and the provision of a spot plate to eliminate surface reflections from the chamber window. (auth)

Rosin, S.

1962-01-01T23:59:59.000Z

57

CALCULATION OF PULSED KICKER MAGNETIC FIELD ATTENUATION INSIDE BEAM CHAMBERS  

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

CALCULATION OF PULSED KICKER MAGNETIC FIELD ATTENUATION CALCULATION OF PULSED KICKER MAGNETIC FIELD ATTENUATION INSIDE BEAM CHAMBERS S. H. Kim January 8, 2001 1. Introduction and Summary The ceramic beam chambers in the sections of the kicker magnets for the beam injection and extraction in the Advanced Photon Source (APS) are made of alumina. The inner surface of the ceramic chamber is coated with a conductive paste. The choice of coating thickness is intended to reduce the shielding of the pulsed kicker magnetic field while containing the electromagnetic fields due to the beam bunches inside the chamber, and minimize the Ohmic heating due to the fields on the chamber [1]. The thin coating generally does not give a uniform surface resistivity for typical dimensions of the ceramic chambers in use. The chamber cross section is a circular or

58

Vacuum chamber with a supersonic flow aerodynamic window  

DOE Patents (OSTI)

A supersonic flow aerodynamic window, whereby a steam ejector situated in a primary chamber at vacuum exhausts superheated steam toward an orifice to a region of higher pressure, creating a barrier to the gas in the region of higher pressure which attempts to enter through the orifice. In a mixing chamber outside and in fluid communication with the primary chamber, superheated steam and gas are combined into a mixture which then enters the primary chamber through the orifice. At the point of impact of the ejector/superheated steam and the incoming gas/superheated steam mixture, a barrier is created to the gas attempting to enter the ejector chamber. This barrier, coupled with suitable vacuum pumping means and cooling means, serves to keep the steam ejector and primary chamber at a negative pressure, even though the primary chamber has an orifice to a region of higher pressure.

Hanson, Clark L. (Livermore, CA)

1982-01-01T23:59:59.000Z

59

Vacuum chamber with a supersonic-flow aerodynamic window  

DOE Patents (OSTI)

A supersonic flow aerodynamic window is disclosed whereby a steam ejector situated in a primary chamber at vacuum exhausts superheated steam toward an orifice to a region of higher pressure, creating a barrier to the gas in the region of higher pressure which attempts to enter through the orifice. In a mixing chamber outside and in fluid communication with the primary chamber, superheated steam and gas are combined into a mixture which then enters the primary chamber through the orifice. At the point of impact of the ejector/superheated steam and the incoming gas/superheated steam mixture, a barrier is created to the gas attempting to enter the ejector chamber. This barrier, coupled with suitable vacuum pumping means and cooling means, serves to keep the steam ejector and primary chamber at a negative pressure, even though the primary chamber has an orifice to a region of higher pressure.

Hanson, C.L.

1980-10-14T23:59:59.000Z

60

Vacuum chamber for containing particle beams  

DOE Patents (OSTI)

A vacuum chamber for containing a charged particle beam in a rapidly changing magnetic environment comprises a ceramic pipe with conducting strips oriented along the longitudinal axis of the pipe and with circumferential conducting bands oriented perpendicular to the longitudinal axis but joined with a single longitudinal electrical connection. When both strips and bands are on the outside of the ceramic pipe, insulated from each other, a high-resistance conductive layer such as nickel can be coated on the inside of the pipe.

Harvey, A.

1985-11-26T23:59:59.000Z

Note: This page contains sample records for the topic "xmcd chamber 6t" 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

Dielectric liquid ionization chambers for detecting fast neutrons  

E-Print Network (OSTI)

Three ionization chambers with different geometries have been constructed and filled with dielectric liquids for detection of fast neutrons. The three dielectric liquids studied were Tetramethylsilane (TMS), Tetramethylpentane ...

Boyd, Erin M

2008-01-01T23:59:59.000Z

62

The hydrogen bubble chamber and the strange resonances  

SciTech Connect

The author's recollections of his experience in the use of bubble chambers and the discoveries of strange resonances are given. (LEW)

Alvarez, L.W.

1985-06-01T23:59:59.000Z

63

DOSIMETRY, INSTRUMENTATION AND EXPOSURE CHAMBERS FOR DC MAGNETIC HELD STUDIES  

E-Print Network (OSTI)

C. -K. Yen ENGINEERING AND INSTRUMENTATION C. Dols D. NelsonLaboratory DOSIMETRY, INSTRUMENTATION AND EXPOSURE CHAMBERSLBL-9554 DOSIMETRY, INSTRUMENTATION AND EXPOSURE CHAMBERS

Tenforde, T.S.

2010-01-01T23:59:59.000Z

64

The hydrogen bubble chamber and the strange resonances  

DOE Green Energy (OSTI)

The author's recollections of his experience in the use of bubble chambers and the discoveries of strange resonances are given. (LEW)

Alvarez, L.W.

1985-06-01T23:59:59.000Z

65

Luis Alvarez, the Hydrogen Bubble Chamber, Tritium, and Dinosaurs  

Office of Scientific and Technical Information (OSTI)

Luis Alvarez, the Hydrogen Bubble Chamber, Tritium, and Dinosaurs Resources with Additional Information Patents Luis Alvarez Courtesy Lawrence Berkeley National Laboratory 'Luis...

66

China New Energy Chamber of Commerce CNECC | Open Energy Information  

Open Energy Info (EERE)

China Zip 100052 Product A Chinese non-profit membership organization specializing in new energy industry, which is supervised by Chinese National Chamber of Commerce. References...

67

NIF Target Chamber Dedicated | National Nuclear Security Administratio...  

National Nuclear Security Administration (NNSA)

NNSA Archive Federal Employment Apply for Our Jobs Our Jobs Working at NNSA Blog Home > About Us > Our History > NNSA Timeline > NIF Target Chamber Dedicated NIF Target...

68

Numerical Simulation on Forced Swirl Combustion Chamber in Diesel Engine  

Science Conference Proceedings (OSTI)

A concept of forced swirl combustion chamber in diesel engine is proposed in this paper. It can be used to enhance the intensity of swirl flow in the cylinder and accelerate the rate of air-fuel mixture process by designing the special structure in the ... Keywords: diesel engine, forced swirl, combustion chamber, simulation

Yong Shang; Fu-shui Liu; Xiang-rong Li

2010-12-01T23:59:59.000Z

69

Numerical Simulation on Forced Swirl Combustion Chamber in Diesel Engine  

Science Conference Proceedings (OSTI)

A concept of forced swirl combustion chamber in diesel engine is proposed in this paper. It can be used to enhance the intensity of swirl flow in the cylinder and accelerate the rate of air-fuel mixture process by designing the special structure in the ... Keywords: diesel engine, forced swirl, combustion chamber, simulation

Shang Yong; Liu Fu-shui; Li Xiang-rong

2011-02-01T23:59:59.000Z

70

Jet engine's speed controller with constant pressure chamber  

Science Conference Proceedings (OSTI)

The paper deals with an automatic system meant to control a jet engine's rotation speed, through the fuel injection's control, based on a constant pressure chamber controller. One has established the non-linear mathematical model (based on the motion ... Keywords: actuator, control, fuel injection, fuel pump, jet-engine, pressure chamber

Alexandru Nicolae Tudosie

2008-06-01T23:59:59.000Z

71

Chemistry of radiation damage to wire chambers  

SciTech Connect

Proportional counters are used to study aspects of radiation damage to wire chambers (wire aging). Principles of low-pressure, rf plasma chemistry are used to predict the plasma chemistry in electron avalanches (1 atm, dc). (1) Aging is studied in CF{sub 4}/iC{sub 4}H{sub 10} gas mixtures. Wire deposits are analyzed by Auger electron spectroscopy. An apparent cathode aging process resulting in loss of gain rather than in a self-sustained current is observed in CF{sub 4}-rich gases. A four-part model considering plasma polymerization of the hydrocarbon, etching of wire deposits by CF{sub 4}, acceleration of deposition processes in strongly etching environments, and reactivity of the wire surface is developed to understand anode wire aging in CF{sub 4}/iC{sub 4}H{sub 10} gases. Practical guidelines suggested by the model are discussed. (2) Data are presented to suggest that trace amounts of Freons do not affect aging rates in either dimethyl ether or Ar/C{sub 2}H{sub 6}. Apparent loss of gain is explained by attachment of primary electrons to a continuously increasing concentration of Freon 11 (CCl{sub 3}F) in the counter gas. An increase in the concentration of Freon 11 in dimethyl ether is caused by a distillation process in the gas supply bottle and is a natural consequence of the unequal volatilities of the two compounds.

Wise, J.

1992-08-01T23:59:59.000Z

72

NIF Target Chamber Dedicated | National Nuclear Security Administration  

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

NIF Target Chamber Dedicated | National Nuclear Security Administration NIF Target Chamber Dedicated | National Nuclear Security Administration Our Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear Navy Emergency Response Recapitalizing Our Infrastructure Continuing Management Reform Countering Nuclear Terrorism About Us Our Programs Our History Who We Are Our Leadership Our Locations Budget Our Operations Media Room Congressional Testimony Fact Sheets Newsletters Press Releases Speeches Events Social Media Video Gallery Photo Gallery NNSA Archive Federal Employment Apply for Our Jobs Our Jobs Working at NNSA Blog Home > About Us > Our History > NNSA Timeline > NIF Target Chamber Dedicated NIF Target Chamber Dedicated June 11, 1999 Livermore, CA NIF Target Chamber Dedicated Secretary Richardson dedicates the National Ignition Facility target

73

QN_CloudChamberV1.4  

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

How to Build a Cosmic-Ray Cloud Chamber How to Build a Cosmic-Ray Cloud Chamber October 2008, Version 1.4 * QuarkNet version. Fermi National Accelerator Laboratory. * Instructions written by Jeremy Paschke, York High School and Anne Mary Teichert, Fermilab. * Model initially designed and built by Robert Peterson, Fermilab. If you have further questions, or improvements of your own you would like to share with the QuarkNet group, please contact: Jeremy Paschke, York High School Physics Instructor (jpaschke@elmhurst205.org), or Bob Peterson, Fermilab Education Specialist, (rspete@fnal.gov). Justification: Showing your class a working cloud chamber is one of the best ways to generate student interest in modern physics. The cloud chamber described below will display natural background radiation (muons generated by

74

SMALL CHAMBER MEASUREMENT OF CHEMICAL SPECIFIC EMISSION FACTORS...  

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

temperature environmental chamber. The tests were all run at 25 C, 50% relative humidity (RH) and with an area-specific ventilation rate of 1.5 cubic meters per square meter...

75

BSA 08-14: A Multi-Anode Ionization Chamber  

BSA 08-14: A Multi-Anode Ionization Chamber. BNL Reference Number: BSA 08-14. Patent Status: U.S. Patent Number 7,858,949 was issued on December 28, 2010

76

A New Horizontal Gradient, Continuous Flow, Ice Thermal Diffusion Chamber  

Science Conference Proceedings (OSTI)

A continuous-flow, horizontal gradient, ice thermal diffusion chamber has been developed and tested for heterogeneous ice nucleation of aerosol particles under accurately controlled supersaturations and supercooling in the absence of a substrate. ...

E. M. Tomlinson; N. Fukuta

1985-12-01T23:59:59.000Z

77

Single chamber fuel cells: Flow geometry, rate and composition considerations  

E-Print Network (OSTI)

the key technical hurdles in SOFC development. Furthermore,bellow those of dual chamber SOFC, and increase even moresmaller than that of other SOFC, but the heat generated by

Stefan, Ionel C.; Jacobson, Craig P.; Visco, Steven J.; De Jonghe, Lutgard C.

2003-01-01T23:59:59.000Z

78

Modeling chamber transport for heavy-ion fusion  

E-Print Network (OSTI)

representation of the molten-salt jets. Acknowledgments Thisto the target. Since molten-salt jets are planned to protectshielding, two meters of molten-salt jets inside the chamber

2002-01-01T23:59:59.000Z

79

A self-triggered readout for a time projection chamber  

E-Print Network (OSTI)

A self-triggering readout for a time projection chamber (TPC) is presented, with applications to novel forms of data acquisition for high energy physics application. The construction and initial testing of the readout ...

Werner, Andrew Thompson, 1981-

2004-01-01T23:59:59.000Z

80

Aging in the large CDF axial drift chamber  

DOE Green Energy (OSTI)

The Central Outer Tracker (COT) is a large axial drift chamber in the Collider Detector at Fermilab operating with a gas mixture that is 50/50 argon/ethane with an admixture of 1.7% isopropanol. In its first two years of operation the COT showed unexpected aging with the worst parts of the chamber experiencing a gain loss of {approx}50% for an accumulated charge of {approx}35 mC/cm. By monitoring the pulse height of hits on good tracks, it was possible to determine the gain as a function of time and location in the chamber. In addition, the currents of the high voltage supplies gave another monitor of chamber gain and its dependence on the charge deposition rate. The aging was worse on the exhaust end of the chamber consistent with polymer buildup as the gas flows through the chamber. The distribution in azimuth suggests that aging is enhanced at lower temperatures, but other factors such as gas flow patterns may be involved. Elemental and molecular analysis of the sense wires found a coating that is mostly carbon and hydrogen with a small amount of oxygen; no silicon or other contaminants were identified. High resolution electron microscope pictures of the wire surface show that the coating is smooth with small sub-micron nodules. In the course of working with the chamber gas system, we discovered a small amount of O{sub 2} is enough to reverse the aging. Operating the chamber with {approx}100 ppm of O{sub 2} reversed almost two years of gain loss in less than 10 days while accumulating {le} 2 mC/cm.

Allspach, D.; Ambrose, D.; Binkley, M.; /Fermilab; Bromberg, C.; /Michigan State U.; Burkett, K.; Kephart, R.; Madrak, R.; Miao, T.; Mukherjee, A.; Roser, R.; Wagner, R.L. /Fermilab

2004-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "xmcd chamber 6t" 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

Broadband impedance calculations of the TAN vacuum chamber for the Large Hadron Collider (LHC)  

E-Print Network (OSTI)

CHAMBER FOR THE LARGE HADRON COLLIDER (LHC) ? D. Li , G.chamber for the Large Hadron Collider (LHC). The TAN is the

Li, D.; Lambertson, G.; Turner, W.

2001-01-01T23:59:59.000Z

82

Dark matter limits froma 15 kg windowless bubble chamber  

SciTech Connect

The COUPP collaboration has successfully used bubble chambers, a technology previously applied only to high-energy physics experiments, as direct dark matter detectors. It has produced the world's most stringent spin-dependent WIMP limits, and increasingly competitive spin-independent limits. These limits were achieved by capitalizing on an intrinsic rejection of the gamma background that all other direct detection experiments must address through high-density shielding and empirically-determined data cuts. The history of COUPP, including its earliest prototypes and latest results, is briefly discussed in this thesis. The feasibility of a new, windowless bubble chamber concept simpler and more inexpensive in design is discussed here as well. The dark matter limits achieved with a 15 kg windowless chamber, larger than any previous COUPP chamber (2 kg, 4 kg), are presented. Evidence of the greater radiopurity of synthetic quartz compared to natural is presented using the data from this 15 kg device, the first chamber to be made from synthetic quartz. The effective reconstruction of the three-dimensional positions of bubbles in a highly distorted optical field, with ninety-degree bottom lighting similar to cloud chamber lighting, is demonstrated. Another innovation described in this thesis is the use of the sound produced by bubbles recorded by an array of piezoelectric sensors as the primary means of bubble detection. In other COUPP chambers, cameras have been used as the primary trigger. Previous work on bubble acoustic signature differentiation using piezos is built upon in order to further demonstrate the ability to discriminate between alpha- and neutron-induced events.

Szydagis, Matthew Mark; /Chicago U.

2010-12-01T23:59:59.000Z

83

Method to calibrate fission chambers in Campbelling mode  

Science Conference Proceedings (OSTI)

Fission chambers are neutron detectors which are widely used to instrument experimental reactors such as material testing reactors or zero power reactors. In the presence of a high level mixed gamma and neutron flux, fission chambers can be operated in Campbelling mode (also known as 'fluctuation mode' or 'mean square voltage mode') to provide reliable and precise neutron related measurements. Fission chamber calibration in Campbelling mode (in terms of neutron flux) is usually done empirically using a calibrated reference detector. A major drawback of this method is that calibration measurements have to be performed in a neutron environment very similar to the one in which the calibrated detector will be used afterwards. What we propose here is a different approach based on characterizing the fission chamber response in terms of fission rate. This way, the detector calibration coefficient is independent from the neutron spectrum and can be determined prior to the experiment. The fissile deposit response to the neutron spectrum can then be assessed independently by other means (experimental or numerical). In this paper, the response of CEA made miniature fission chambers in Campbelling mode is studied. We use a theoretical model of the signal to calculate the calibration coefficient. Input parameters of the model come from statistical distribution of individual pulses. Supporting measurements have been made in the CEA Cadarache zero power reactor MINERVE. Results are compared to an empirical Campbelling mode calibration.

Benoit Geslot; Troy C. Unruh; Philippe Filliatre; Christian Jammes; Jacques Di Salvo; Stphane Braud; Jean-Franois Villard

2011-06-01T23:59:59.000Z

84

Investigation of Argon Gas as a Potential Shock Attenuator in Z-IFE Chambers Using ALEGRA  

Science Conference Proceedings (OSTI)

Technical Paper / The Technology of Fusion Energy - Inertial Fusion Technology: Targets and Chambers

Sal B. Rodriguez; Jason Cook

85

A Continuous, In-Chamber Target Tracking and Engagement Approach for Laser Fusion  

Science Conference Proceedings (OSTI)

Technical Paper / The Technology of Fusion Energy - Inertial Fusion Technology: Targets and Chambers

Ron Petzoldt; Neil Alexander; Lane Carlson; Graham Flint; Dan Goodin; Jon Spalding; Mark Tillack

86

Federation of Indian Chambers of Commerce & Industry (FICCI) | Department  

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

Federation of Indian Chambers of Commerce & Industry (FICCI) Federation of Indian Chambers of Commerce & Industry (FICCI) Federation of Indian Chambers of Commerce & Industry (FICCI) March 20, 2007 - 11:37am Addthis Thank you Geoff (Pyatt) for that introduction. I'd like to thank FICCI for hosting this event and thank its leadership for their kind words. I'm very pleased to be here in India - and to be with all of you today. Since his very first days in office, President Bush has considered growing and strengthening the United States' bilateral relationship with India to be a top priority. The shared commitment of President Bush and Prime Minister Singh to building our relationship was evidenced by the historic strategic partnership initiatives announced during the President's visit here in March of last year.

87

Challenge Met as APS Sends Final Chambers to LCLS  

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

A Marriage of Hardware and Hard Work A Marriage of Hardware and Hard Work Shaken but Not Stirred 2008 Rosalind Franklin Young Investigator Award The 2008 3-Way Meeting In R&D, Super X-rays Mark Many Spots APS News Archives: 2012 | 2011 | 2010 | 2009 2008 | 2007 | 2006 | 2005 2004 | 2003 | 2002 | 2001 2000 Subscribe to APS News rss feed Challenge Met as APS Sends Final Chambers to LCLS MAY 21, 2008 Bookmark and Share The final five (of 40) extruded aluminum vacuum chambers for the Linac Coherent Light Source (LCLS) undulator system have been shipped from Argonne National Laboratory - where the chambers were designed and assembled - to the Stanford Linear Accelerator Center, where the LCLS "will be the world's first x-ray free electron laser when it becomes operational in 2009. Pulses of x-ray laser light from LCLS will be many

88

Electromagnetic pulse generation within a petawatt laser target chamber  

Science Conference Proceedings (OSTI)

Recent work has been undertaken to characterize the electromagnatic pulse (EMP) generated by the high temperature high density plasma produced by a petawatt laser. This was to evaluate the susceptibility to malfunction and damage of equipment and diagnostics for the new Orion laser. EMP measurement were made using moebius loop antennas fitted inside the target chamber of the Vulcan petawatt laser at the Rutherford Appleton Laboratory. These show the EMP as a 63 MHz transient which decays from a peak magnetic field of around 4.3 A/m. A theoretical model presented assumes the EMP is produced by an impulse of 10{sup 12} electron emanating from the target, which charge the chamber wall causing it to ring at natural frequency. The theoretical model provides an estimate of the EMP measured in the Vulcan petawatt target chamber and will be used for the design of the Orion laser.

Mead, M.J.; Neely, D.; Gauoin, J.; Heathcote, R.; Patel, P. [Atomic Weapons Establishment, Aldermaston, Reading, RG7 4PR (United Kingdom); CLRC Rutherford Appleton Laboratory, Chilton, Didcot, OX11 0QX (United Kingdom); Lawrence Livermore National Laboratory, Livermore, California 94550 (United States)

2004-10-01T23:59:59.000Z

89

Chamber Design for the Laser Inertial Fusion Energy (LIFE) Engine  

Science Conference Proceedings (OSTI)

The Laser Inertial Fusion Energy (LIFE) concept is being designed to operate as either a pure fusion or hybrid fusion-fission system. The present work focuses on the pure fusion option. A key component of a LIFE engine is the fusion chamber subsystem. It must absorb the fusion energy, produce fusion fuel to replace that burned in previous targets, and enable both target and laser beam transport to the ignition point. The chamber system also must mitigate target emissions, including ions, x-rays and neutrons and reset itself to enable operation at 10-15 Hz. Finally, the chamber must offer a high level of availability, which implies both a reasonable lifetime and the ability to rapidly replace damaged components. An integrated design that meets all of these requirements is described herein.

Latkowski, J F; Abbott, R P; Aceves, S; Anklam, T; Badders, D; Cook, A W; DeMuth, J; Divol, L; El-Dasher, B; Farmer, J C; Flowers, D; Fratoni, M; ONeil, R G; Heltemes, T; Kane, J; Kramer, K J; Kramer, R; Lafuente, A; Loosmore, G A; Morris, K R; Moses, G A; Olson, B; Pantano, C; Reyes, S; Rhodes, M; Roe, K; Sawicki, R; Scott, H; Spaeth, M; Tabak, M; Wilks, S

2010-11-30T23:59:59.000Z

90

Fuel subassembly leak test chamber for a nuclear reactor  

DOE Patents (OSTI)

A container with a valve at one end is inserted into a nuclear reactor coolant pool. Once in the pool, the valve is opened by a mechanical linkage. An individual fuel subassembly is lifted into the container by a gripper; the valve is then closed providing an isolated chamber for the subassembly. A vacuum is drawn on the chamber to encourage gaseous fission product leakage through any defects in the cladding of the fuel rods comprising the subassembly; this leakage may be detected by instrumentation, and the need for replacement of the assembly ascertained.

Divona, Charles J. (Santa Ana, CA)

1978-04-04T23:59:59.000Z

91

The Laser Calibration System of the ALICE Time Projection Chamber  

E-Print Network (OSTI)

Collider (LHC) dedicated to the study of heavy ion collisions. The Time Projection Chamber (TPC) is the main tracking detector covering the pseudo rapidity range |? | laser system is to simulate ionizing tracks at predifined positions throughout the drift volume in order to monitor the TPC response to a known source. In particular, the alignment of the read-out chambers will be performed, and variations of the drift velocity due to drift field imperfections can be measured and used as calibration data in the physics data analysis. In this paper we present the design of the pulsed UV laser and optical system, together with the control and monitoring systems.

G. Renault; B. S. Nielsen; J. Westergaard; J. J. Gaardhje For The

2005-01-01T23:59:59.000Z

92

Single chamber fuel cells: Flow geometry, rate and composition considerations  

DOE Green Energy (OSTI)

Four different single chamber fuel cell designs were compared using propane-air gas mixtures. Gas flow around the electrodes has a significant influence on the open circuit voltage and the power density of the cell. The strong influence of flow geometry is likely due to its effect on gas composition, particularly on the oxygen chemical potential at the two electrodes as a result of gas mixing. The chamber design which exposes the cathode first to the inlet gas was found to yield the best performance at lower flow rates, while the open tube design with the electrodes equally exposed to the inlet gas worked best at higher flow rates.

Stefan, Ionel C.; Jacobson, Craig P.; Visco, Steven J.; De Jonghe, Lutgard C.

2003-11-17T23:59:59.000Z

93

April 10, 2002 A. R. Raffray, et al., Dynamic Chamber Armor Behavior in IFE and MFE 1 Dynamic Chamber Armor Behavior in IFE and MFE  

E-Print Network (OSTI)

April 10, 2002 A. R. Raffray, et al., Dynamic Chamber Armor Behavior in IFE and MFE 1 Dynamic Chamber Armor Behavior in IFE and MFE A. R. Raffray1, G. Federici2, A. Hassanein3, D. Haynes4 1University Diego April 10, 2002 #12;April 10, 2002 A. R. Raffray, et al., Dynamic Chamber Armor Behavior in IFE

Raffray, A. René

94

Right/left assignment in drift chambers and proportional multiwire chambers (PWC's) using induced signals  

DOE Patents (OSTI)

Improved multiwire chamber having means for resolving the left/right ambiguity in the location of an ionizing event. The chamber includes a plurality of spaced parallel anode wires positioned between spaced planar cathodes. Associated with each of the anode wires are a pair of localizing wires, one positioned on either side of the anode wire. The localizing wires are connected to a differential amplifier whose output polarity is determined by whether the ionizing event occurs to the right or left of the anode wire.

Walenta, Albert H. (Upton, NY)

1979-01-01T23:59:59.000Z

95

Modeling Chamber Transport for Heavy-Ion Fusion  

DOE Green Energy (OSTI)

In a typical thick-liquid-wall scenario for heavy-ion fusion (HIF), between seventy and two hundred high-current beams enter the target chamber through ports and propagate about three meters to the target. Since molten-salt jets are planned to protect the chamber wall, the beams move through vapor from the jets, and collisions between beam ions and this background gas both strip the ions and ionize the gas molecules. Radiation from the preheated target causes further beam stripping and gas ionization. Due to this stripping, beams for heavy-ion fusion are expected to require substantial neutralization in a target chamber. Much recent research has, therefore, focused on beam neutralization by electron sources that were neglected in earlier simulations, including emission from walls and the target, photoionization by the target radiation, and pre-neutralization by a plasma generated along the beam path. When these effects are included in simulations with practicable beam and chamber parameters, the resulting focal spot is approximately the size required by a distributed radiator target.

Sharp, W M; Niller, D A C; Tabak, M; Yu, S S; Peterson, P F; Welch, D R; Rose, D V; Olson, C L

2002-08-02T23:59:59.000Z

96

Computation of azimuthal combustion instabilities in an helicopter combustion chamber  

E-Print Network (OSTI)

Computation of azimuthal combustion instabilities in an helicopter combustion chamber C. Sensiau to compute azimuthal combustion instabilities is presented. It requires a thermoacoustic model using a n - formulation for the coupling between acoutics and combustion. The parameters n and are computed from a LES

Nicoud, Franck

97

ARIES INERTIAL FUSION CHAMBER ASSESSMENT M. S. Tillack, F. Najmabadi  

E-Print Network (OSTI)

Washington, DC 20375 L. M. Waganer Boeing Company P.O. Box 516 St Louis, MO 63166-0516 and the ARIES Team to define design windows and explore in detail the tradeoffs for various chamber concepts. The work to better understand fundamental tradeoffs, characterize design windows and offer additional guidance to R

California at San Diego, University of

98

Combustion chamber and thermal vapor stream producing apparatus and method  

DOE Patents (OSTI)

A new and improved method and apparatus for burning a hydrocarbon fuel for producing a high pressure thermal vapor stream comprising steam and combustion gases for injecting into a subterranean formation for the recovery of liquefiable minerals therefrom, wherein a high pressure combustion chamber having multiple refractory lined combustion zones of varying diameters is provided for burning a hydrocarbon fuel and pressurized air in predetermined ratios injected into the chamber for producing hot combustion gases essentially free of oxidizing components and solid carbonaceous particles. The combustion zones are formed by zones of increasing diameters up a final zone of decreasing diameter to provide expansion zones which cause turbulence through controlled thorough mixing of the air and fuel to facilitate complete combustion. The high pressure air and fuel is injected into the first of the multiple zones where ignition occurs with a portion of the air injected at or near the point of ignition to further provide turbulence and more complete combustion.

Sperry, John S. (Houston, TX); Krajicek, Richard W. (Sugar Land, TX); Cradeur, Robert R. (Spring, TX)

1978-01-01T23:59:59.000Z

99

Study of the response of low pressure ionization chambers  

E-Print Network (OSTI)

The Beam Loss Monitoring System (BLM) of the Large Hadron Collider (LHC) is based on parallel plate Ionization Chambers (IC) with active volume 1.5l and a nitrogen filling gas at 0.1 bar overpressure. At the largest loss locations, the ICs generate signals large enough to saturate the read-out electronics. A reduction of the active volume and filling pressure in the ICs would decrease the amount of charge collected in the electrodes, and so provide a higher saturation limit using the same electronics. This makes Little Ionization Chambers (LIC) with both reduced pressure and small active volume a good candidate for these high radiation areas. In this contribution we present measurements performed with several LIC monitors with reduced active volume and various filling pressures. These detectors were tested under various conditions with different beam setups, with standard LHC ICs used for calibration purposes

Nebot Del Busto, E; Effinger, E; Grishin, V; Herranz Alvarez, J

2012-01-01T23:59:59.000Z

100

Destruction of nuclear graphite using closed chamber incineration  

Science Conference Proceedings (OSTI)

Closed chamber incineration (CCI) is a novel technique by which irradiated nuclear graphite may be destroyed without the risk of radioactive cation release into the environment. The process utilizes an enclosed combustion chamber coupled with molten carbonate fuel cells (MCFCs). The transport of cations is intrinsically suppressed by the MCFCs, such that only the combustion gases are conducted through for release to the environment. An example CCI design was developed which had as its goal the destruction of graphite fuel elements from the Fort St. Vrain reactor (FSVR). By employing CCI, the volume of high level waste from the FSVR will be reduced by approximately 87 percent. Additionally, the incineration process will convert the SiC coating on the FSVR fuel particles to SiO{sub 2}, thus creating a form potentially suitable for direct incorporation in a vitrification process stream. The design is compact, efficient, and makes use of currently available technology.

Senor, D.J.; Hollenberg, G.W.; Morgan, W.C. [Pacific Northwest Lab., Richland, WA (United States); Marianowski, L.G. [Institute of Gas Technology, Chicago, IL (United States)

1994-03-01T23:59:59.000Z

Note: This page contains sample records for the topic "xmcd chamber 6t" 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

Using sputter coated glass to stabilize microstrip gas chambers  

DOE Patents (OSTI)

By sputter coating a thin-layer of low-resistive, electronically-conductive glass on various substrates (including quartz and ceramics, thin-film Pestov glass), microstrip gas chambers (MSGC) of high gain stability, low leakage current, and a high rate capability can be fabricated. This design can make the choice of substrate less important, save the cost of ion-implantation, and use less glass material.

Gong, Wen G. (Albany, CA)

1997-01-01T23:59:59.000Z

102

Aging Chamber Report Tool (ACRT) Version 5.0  

Science Conference Proceedings (OSTI)

The 230kV Accelerated Aging Chamber is a multi-year test of more than 50 polymer and fiberglass components. Photographic inspections occur twice a year. Thousands of photographs accumulate making conventional reports difficult to read. This reporting tool enables the reader to jump from component to component and inspection to inspection. The reader can easily compare components at different levels of aging. This tool will make reviewing the important results of this ...

2012-09-20T23:59:59.000Z

103

Aging Chamber Report Tool (ACRT) v6.0  

Science Conference Proceedings (OSTI)

The 230kV Accelerated Aging Chamber is a multi-year test of more than 50 polymer and fiberglass components. Photographic inspections occur twice a year. Thousands of photographs accumulate making conventional reports difficult to read. This reporting tool enables the reader to jump from component to component and inspection to inspection. The reader can easily compare components at different levels of aging. This tool will make reviewing the important results of this ...

2013-12-10T23:59:59.000Z

104

High Rate Resistive Plate Chamber for LHC detector upgrades  

E-Print Network (OSTI)

The limitation of the detection rate of standard bakelite resistive plate chambers (RPC) used as muon detectors in the LHC experiments has prevented the use of such detectors in the high rate regions in both CMS and ATLAS detectors. One alternative to these detectors are RPCs made with low resistivity glass plates ($10^{10} {\\rm \\Omega .cm}$), a beam test at DESY has shown that such detectors can operate at few thousand Hz/cm$^2$ with high efficiency(> 90%)

Y. Haddad; G. Grenier; I. Laktineh; N. Lumb; S. Cauwenbergh

2012-11-24T23:59:59.000Z

105

LAYOUT AND SIZING OF ESF ALCOVES AND REFUGE CHAMBERS  

SciTech Connect

The purpose of this analysis is to establish size requirements and approximate locations of Exploratory Studies Facility (ESF) test and operations alcoves, including refuge chambers during construction of the Topopah Spring (TS) loop. Preliminary conceptual layouts for non-deferred test alcoves will be developed to examine construction feasibility based on current test plans and available equipment. The final location and configuration layout for alcoves will be developed when in-situ rock conditions can be visually determined. This will be after the TBM has excavated beyond the alcove location and the rock has been exposed. The analysis will examine the need for construction of walkways and electrical alcoves in the ramps and main drift. Niches that may be required to accommodate conveyor booster drives and alignments are not included in this analysis. The analysis will develop design criteria for refuge chambers to meet MSHA requirements and will examine the strategic location of refuge chambers based on their potential use in various ESF fire scenarios. This document supersedes DI:BABE00000-01717-0200-00003 Rev 01, ''TS North Ramp Alcove and Stubout Location Analysis'' in its entirety (Reference 5-6).

John Beesley and Romeo S. Jurani

1995-08-25T23:59:59.000Z

106

Tobacco smoke aging in the presence of ozone: a room-sized chamber...  

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

Tobacco smoke aging in the presence of ozone: a room-sized chamber study Title Tobacco smoke aging in the presence of ozone: a room-sized chamber study Publication Type Journal...

107

A Continuous-Flow Diffusion Chamber for Airborne Measurements of Ice Nuclei  

Science Conference Proceedings (OSTI)

A continuous-flow thermal gradient diffusion chamber was developed for operating in an aircraft and detecting ice nucleating aerosol particles in real time. The chamber volume is the annular space between two vertically oriented concentric ...

David C. Rogers; Paul J. DeMott; Sonia M. Kreidenweis; Yalei Chen

2001-05-01T23:59:59.000Z

108

Test with cosmic rays of the GEM chambers for the LHCb muon system produced in Cagliari  

E-Print Network (OSTI)

The inner region of the first LHCb muon station will be equipped with twelve Gas Electron Multiplier chambers. The seven chambers produced in Cagliari were studied for several days each using cosmic rays. We measured the efficiency, timing resolution, and uniformity, cluster-size and out-of-time multiplicity. We find all seven chambers perform well.

Bonivento, W; Oldeman, R G C

2007-01-01T23:59:59.000Z

109

Los Alamos honored by Española Valley Chamber of Commerce  

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

LANL Honored By Española Valley Chamber of Commerce LANL Honored By Española Valley Chamber of Commerce Community Connections: Our link to Northern New Mexico Communities Latest Issue:Dec. 2013 - Jan. 2014 All Issues » submit Los Alamos honored by Española Valley Chamber of Commerce The Espanola Valley Chamber of Commerce recognized the Lab for its support to the chamber and the entire Espanola Valley with a President's Choice Award. February 1, 2013 dummy image Read our archives. Contacts Editor Linda Anderman Email Community Programs Office Kurt Steinhaus Email The Lab received the award for efforts in a variety of areas. In late January, the Espanola Valley Chamber of Commerce recognized the Lab for its support to the chamber and the entire Espanola Valley with a President's Choice Award. Kurt Steinhaus with the Lab's Community

110

Long ion chamber systems for the SLC (Stanford Linear Collider)  

Science Conference Proceedings (OSTI)

A Panofsky Long Ion Chamber (PLIC) is essentially a gas-filled coaxial cable, and has been used to protect the Stanford Linear Accelerator from damage caused by its electron beam, and as a sensitive diagnostic tool. This old technology has been updated and has found renewed use in the SLC. PLIC systems have been installed as beam steering aids in most parts of the SLC and are a part of the system that protects the SLC from damage by errant beams in several places. 5 refs., 3 figs., 1 tab.

Rolfe, J.; Gearhart, R.; Jacobsen, R.; Jenkins, T.; McComick, D.; Nelson, R.; Reagan, D.; Ross, M.

1989-03-01T23:59:59.000Z

111

The Time Projection Chamber for the ALICE Experiment  

E-Print Network (OSTI)

The Time Projection Chamber of the ALICE Experiment has been installed in the experimental setup in the underground area at the Large Hadron Collider at CERN in Geneva. The Alice TPC ReadOut (ALTRO) chip implements intelligent signal processing on the Front-End-Electronics. During the years of 2007 and 2008 commissioning and calibration of the TPC have been carried out with cosmic rays, radioactive Krypton isotopes and with tracks produced by a UV laser system. In addition to these in this publication we present first results on energy loss measurements and on the momentum resolution.

C. Lippmann; the ALICE TPC collaboration

2008-09-30T23:59:59.000Z

112

Anechoic Chamber of the National Research Council of Canada  

Science Conference Proceedings (OSTI)

The anechoic chamber built recently by the National Research Council (approximately 241717 ft) incorporates a number of design features which reduce substantially the cost of the structure with no sacrifice in performance. An appreciable part of the saving was achieved by a simplification in the preparation and mounting of the wedges. (The cost of treatment was $3.53 per square foot.) The wedges were sprayed with three coats of lacquer to improve the binding of the Fiberglas and thus facilitate handling and avoid shedding. The only appreciable effect on the absorption coefficient for normal incidence was to lower the cutoff frequency from 85 cps to 80 cps. The wedges were wrapped in cheese cloth which was then stitched by means of hot paraffin. Instead of pre?mounting the wedges on a base individual holders were stamped out of sheet metal and stapled to the furring strips. The wedges could then be mounted in about 8 sec each. The inner room is of frame construction with a removable catwalk hung from the ceiling. The performance of the completed chamber was measured by the standard inverse square law method.

N. Olson; G. J. Thiessen; E. A. G. Shaw; T. F. W. Embleton

1959-01-01T23:59:59.000Z

113

Wire-chamber radiation detector with discharge control  

DOE Patents (OSTI)

A wire chamber; radiation detector has spaced apart parallel electrodes and grids defining an ignition region in which charged particles or other ionizing radiations initiate brief localized avalanche discharges and defining an adjacent memory region in which sustained glow discharges are initiated by the primary discharges. Conductors of the grids at each side of the memory section extend in orthogonal directions enabling readout of the X-Y coordinates of locations at which charged particles were detected by sequentially transmitting pulses to the conductors of one grid while detecting transmissions of the pulses to the orthogonal conductors of the other grid through glow discharges. One of the grids bounding the memory region is defined by an array of conductive elements each of which is connected to the associated readout conductor through a separate resistance. The wire chamber avoids ambiguities and imprecisions in the readout of coordinates when large numbers of simultaneous or; near simultaneous charged particles have been detected. Down time between detection periods and the generation of radio frequency noise are also reduced.

Perez-Mendez, V.; Mulera, T.A.

1982-03-29T23:59:59.000Z

114

Slag monitoring system for combustion chambers of steam boilers  

SciTech Connect

The computer-based boiler performance system presented in this article has been developed to provide a direct and quantitative assessment of furnace and convective surface cleanliness. Temperature, pressure, and flow measurements and gas analysis data are used to perform heat transfer analysis in the boiler furnace and evaporator. Power boiler efficiency is calculated using an indirect method. The on-line calculation of the exit flue gas temperature in a combustion chamber allows for an on-line heat flow rate determination, which is transferred to the boiler evaporator. Based on the energy balance for the boiler evaporator, the superheated steam mass flow rate is calculated taking into the account water flow rate in attemperators. Comparing the calculated and the measured superheated steam mass flow rate, the effectiveness of the combustion chamber water walls is determined in an on-line mode. Soot-blower sequencing can be optimized based on actual cleaning requirements rather than on fixed time cycles contributing to lowering of the medium usage in soot blowers and increasing of the water-wall lifetime.

Taler, J.; Taler, D. [Cracow University of Technology, Krakow (Poland)

2009-07-01T23:59:59.000Z

115

BIO-BAG Type Cfj Environmental Chamber DESCRIPTION  

E-Print Network (OSTI)

BIO-BAG Type Cfj is a disposable, individual environmental chamber and a gas generator, consisting of one tablet of potassium borohydride-sodium bicarbonate and an ampule of hydrochloric acid, which when activated in the sealed BIO-BAG chamber provides a microaerophilic atmosphere. INTENDED USE BIO-BAG Type Cfj is designed to provide a microaerophilic environment suitable for the isolation of Campylobacter jejuni, formerly known as C. fetus subsp. jejuni (Cfj), from clinical specimens or subcultures from selective media. When used as directed, BIO-BAG Type Cfj will provide an atmosphere that has been shown to provide optimum growth of C. jejuni. 1,2 SUMMARY AND EXPLANATION Campylobacter jejuni has been recognized as a common enteric pathogen. 2,4,7,8 This organism is a true microaerophile and a capnophilic atmosphere has been shown to enhance growth. 5 Use of a selective medium containing 5 % sheep blood and a combination of antimicrobial agents and incubation at 42C provides conditions favorable for the selective isolation of C. jejuni from intestinal flora. 3,6 Under ideal conditions, characteristic colonies may be observed in 24 to 48 h, 1,2,5 Each BIO-BAG Type Cfj system allows cultures to be set up and observed for growth individually, so that appropriate atmospheric conditions are not interrupted. Exposure to atmospheric oxygen may interfere with the growth of more oxygen-sensitive strains. 5 PRINCIPLE OF THE PROCEDURE A microaerophilic-capnophilic atmosphere is provided in each sealed BIO-BAG Type Cfj system. A self-contained generator consists of an ampule of a weak hydrochloric acid solution and a gas generator tablet. When the ampule is crushed, the tablet is then activated. A portion of atmospheric oxygen in the chamber is utilized in the reaction. The resulting atmosphere is conducive to the isolation and cultivation of C. jejuni. 1,2 Each BIO-BAG Type Cfj system is disposable and designed to be used only once.

unknown authors

1999-01-01T23:59:59.000Z

116

Charge-Focusing Readout of Time Projection Chambers  

E-Print Network (OSTI)

Time projection chambers (TPCs) have found a wide range of applications in particle physics, nuclear physics, and homeland security. For TPCs with high-resolution readout, the readout electronics often dominate the price of the final detector. We have developed a novel method which could be used to build large-scale detectors while limiting the necessary readout area. By focusing the drift charge with static electric fields, we would allow a small area of electronics to be sensitive to particle detection for a much larger detector volume. The resulting cost reduction could be important in areas of research which demand large-scale detectors, including dark matter searches and detection of special nuclear material. We present simulations made using the software package Garfield of a focusing structure to be used with a prototype TPC with pixel readout. This design should enable significant focusing while retaining directional sensitivity to incoming particles. We also present first experimental results and compare them with simulation.

S. J. Ross; M. T. Hedges; I. Jaegle; M. D. Rosen; I. S. Seong; T. N. Thorpe; S. E. Vahsen; J. Yamaoka

2013-04-02T23:59:59.000Z

117

Charge-Focusing Readout of Time Projection Chambers  

E-Print Network (OSTI)

Time projection chambers (TPCs) have found a wide range of applications in particle physics, nuclear physics, and homeland security. For TPCs with high-resolution readout, the readout electronics often dominate the price of the final detector. We have developed a novel method which could be used to build large-scale detectors while limiting the necessary readout area. By focusing the drift charge with static electric fields, we would allow a small area of electronics to be sensitive to particle detection for a much larger detector volume. The resulting cost reduction could be important in areas of research which demand large-scale detectors, including dark matter searches and detection of special nuclear material. We present simulations made using the software package Garfield of a focusing structure to be used with a prototype TPC with pixel readout. This design should enable significant focusing while retaining directional sensitivity to incoming particles. We also present first experimental results and com...

Ross, S J; Jaegle, I; Rosen, M D; Seong, I S; Thorpe, T N; Vahsen, S E; Yamaoka, J

2013-01-01T23:59:59.000Z

118

Radiation damage control in the BNL hypernuclear spectrometer drift chamber system  

SciTech Connect

A high rate drift chamber system has been in use at the BNL hypernuclear spectrometer system for the past three years. Some of the chambers have accumulated charge doses up to about 0.2 C/cm-wire without showing external signs of aging. The system design and performance will be discussed as well as the results of some laboratory drift chamber aging tests. 5 refs., 9 figs.

Pile, P.H.

1986-01-01T23:59:59.000Z

119

Dynamic chamber armor behavior in IFE and MFE A.R. Raffray a,  

E-Print Network (OSTI)

Dynamic chamber armor behavior in IFE and MFE A.R. Raffray a, 1, G. Federici b , A. Hassanein c , D., Madison, WI 53706-1687, USA Abstract The chamber wall armor is subject to demanding conditions in both the requirements on armor imposed by the operating conditions in IFE and MFE, including energy deposition density

Raffray, A. René

120

Combustion in Meso-scale Vortex Chambers Ming-hsun Wu*  

E-Print Network (OSTI)

1 Combustion in Meso-scale Vortex Chambers Ming-hsun Wu* , Yanxing Wang, Vigor Yang and Richard A) #12;2 COMBUSTION IN MESO-SCALE VORTEX CHAMBERS Ming-hsun Wu, Yanxing Wang, Vigor Yang and Richard A with the chemical energy varying from 25 to 174W. For the largest combustion volume, hydrogen and hydrocarbons

Yang, Vigor

Note: This page contains sample records for the topic "xmcd chamber 6t" 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

Ionization statistics and diffusion: analytical estimate of their contribution to spatial resolution of drift chambers  

SciTech Connect

The spatial resolution of a drift chamber often is the foremost design parameter. The calculation described here - a design tool - permits us to estimate the contributions of ionization statistics and diffusion to the spatial resolution when actually sampling the drift pulse waveform. Useful formulae are derived for the cylindrical and jet-chamber cell geometries.

Tarnopolsky, G.J.

1983-01-01T23:59:59.000Z

122

Commissioning an animal preference chamber for behavioral studies with laying hens exposed to atmospheric ammonia  

Science Conference Proceedings (OSTI)

An environmental preference chamber (EPC) with four double-tiered compartments (C1-C4), each capable of being controlled to distinct ammonia (NH"3) concentrations and temperature, was designed, fabricated and commissioned. Preference chambers are commonly ... Keywords: Ambient conditions, Animal welfare, Automatic control, Cross-contamination

G. T. Sales, A. R. Green, R. S. Gates

2013-07-01T23:59:59.000Z

123

OPERATIONAL WINDOWS FOR DRY-WALL AND WETTED-WALL IFE CHAMBERS  

E-Print Network (OSTI)

OPERATIONAL WINDOWS FOR DRY-WALL AND WETTED-WALL IFE CHAMBERS F. NAJMABADI* University the trade- offs, to develop operational windows for chamber con- cepts, and to identify high the injection process; (d) for relatively low yield targets ( 250 MJ), an operational window with no buffer gas

California at San Diego, University of

124

Geologic evidence for a magma chamber beneath Newberry Volcano, Oregon  

SciTech Connect

At Newberry Volcano, central Oregon, more than 0.5 m.y. of magmatic activity, including caldera collapse and renewed caldera-filling volcanism, has created a structural and thermal chimney that channels magma ascent. Holocene rhyolitic eruptions (1) have been confined mainly within the caldera in an area 5 km in diameter, (2) have been very similar in chemical composition, phenocryst mineralogy, and eruptive style, and (3) have occurred as recently as 1300 years ago, with repose periods of 2000--3000 years between eruptions. Holocene basaltic andesite eruptions are widespread on the flanks but are excluded from the area of rhyolitic volcanism. Basaltic andesite in fissures at the edge of the rhyolite area has silicic inclusions and shows mixed basalt-rhyolite magma relations. These geologic relations and the high geothermal gradient that characterizes the lower part of a drill hole in the caldera (U.S. Geological Survey Newberry 2) indicate that a rhyolitic magma chamber has existed beneath the caldera throughout the Holocene. Its longevity probably is a result of intermittent underplating by basaltic magma.

Macleod, N.S.; Sherrod, D.R.

1988-09-10T23:59:59.000Z

125

Atlas chamber, power flow channel, and diagnostic interface design  

DOE Green Energy (OSTI)

The Atlas pulsed-power machine, presently being designed at Los Alamos, will deliver a pulse of {approximately} 45 MA, in 4--5 {micro}sec, with energies of up to 6 MJ (from a bank of 36 MJ maximum) to a load assembly, located in vacuum. Design considerations for the vacuum vessel, power flow channel from the vessel inward, are presented. In contrast to Sandia`s PBFA II-Z, where 20 MA currents and 2--2.5 MJ of energy are delivered to ({approximately} 15 mg) loads in {approximately} 100 nsec, the Atlas structures will have to be designed for longer timescales and higher energies to drive heavy lines ({approximately} 70 g). Design issues for the chamber include materials stresses, formation of (and protection from) debris and molten jets, impulse loading, and survivability and ease of replacement of internal structures. For the power flow channel designs, issues are minimizing inductance, preventing movement of conductors during and after firing, damage mitigation, reducing the cost of materials and installation, and electrical insulation. A key issue for damage mitigation is the radius within which total destruction of material objects occurs. Choices of vessel size, insulator materials, cost and ease of manufacturing, and mechanical stability issues are presently in the conceptual design phase. Typical access requirements for diagnostics (including radial and axial X-ray backlighting, flux loops, spectroscopy, interferometry, bolometry, etc.) are provided for in the design.

Wurden, G.A.; Davis, H.A.; Taylor, A.; Bowman, D.; Ballard, E.; Ney, S.; Scudder, D.; Trainor, J.

1997-09-01T23:59:59.000Z

126

U.S. Chamber of Commerce Biofuels Dialogue Series: Outlook for an Emerging  

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

Chamber of Commerce Biofuels Dialogue Series: Outlook for an Chamber of Commerce Biofuels Dialogue Series: Outlook for an Emerging Global Biofuels Market U.S. Chamber of Commerce Biofuels Dialogue Series: Outlook for an Emerging Global Biofuels Market January 29, 2008 - 10:53am Addthis Remarks as Prepared For Delivery by Secretary Bodman Thank you very much, Bruce, for that kind introduction. My thanks also to Tom Donahue and the leadership of the Chamber for inviting me to be with you today. I was quite pleased to hear that the Chamber was sponsoring this event. As anyone who knows me - or has heard me speak recently - can tell you, the biofuels industry is a favorite topic of mine. In my view, advanced biofuels offer tremendous promise for helping our nation to bring about a new energy future-one that is cleaner, more sustainable, more affordable,

127

The American Chamber of Commerce of Trinidad & Tobago | Department of  

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

The American Chamber of Commerce of Trinidad & Tobago The American Chamber of Commerce of Trinidad & Tobago The American Chamber of Commerce of Trinidad & Tobago May 13, 2008 - 12:00pm Addthis Remarks As Prepared for Delivery by Secretary Bodman Thank you, Raymond. I appreciate the Chamber organizing this gathering this morning. The American Chamber here on Trinidad and Tobago is an important regional voice in support of the free market, so I want to commend you for hosting the Business Future of the Americas conference next month. Having spent most of my career in the private sector, it is always rewarding to be among colleagues from the business community. I'm also quite pleased to be back in Trinidad & Tobago, having done business here during my time at Cabot Corporation. I've always been impressed with this nation's government, its people and

128

MHK Technologies/Multi Resonant Chambers MRC 1000 | Open Energy Information  

Open Energy Info (EERE)

Resonant Chambers MRC 1000 Resonant Chambers MRC 1000 < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage Multi Resonant Chambers MRC 1000.jpg Technology Profile Primary Organization ORECon Technology Resource Click here Wave Technology Type Click here Oscillating Water Column Technology Readiness Level Click here TRL 5 6 System Integration and Technology Laboratory Demonstration Technology Description A 1 5MW Multi Resonant Chamber MRC using Oscillating Water Column OWC principles Consists of 3 x 500kW independent chambers each with a Dresser Rand HydroAir turbine driving an induction generator Full power conversion system delivers grid compliant power 1 5MW 33kV 60Hz to shore Device is tension moored to maximise power capture and minimise footprint All maintenance is done on board No moving parts in the water Turbines are low speed 300rpm high efficiency 75 and low noise

129

Integrated Chamber Design for the Laser Inertial Fusion Energy (LIFE) Engine  

SciTech Connect

The Laser Inertial Fusion Energy (LIFE) concept is being designed to operate as either a pure fusion or hybrid fusion-fission system. A key component of a LIFE engine is the fusion chamber subsystem. The present work details the chamber design for the pure fusion option. The fusion chamber consists of the first wall and blanket. This integrated system must absorb the fusion energy, produce fusion fuel to replace that burned in previous targets, and enable both target and laser beam transport to the ignition point. The chamber system also must mitigate target emissions, including ions, x-rays and neutrons and reset itself to enable operation at 10-15 Hz. Finally, the chamber must offer a high level of availability, which implies both a reasonable lifetime and the ability to rapidly replace damaged components. An integrated LIFE design that meets all of these requirements is described herein.

Latkowski, J F; Kramer, K J; Abbott, R P; Morris, K R; DeMuth, J; Divol, L; El-Dasher, B; Lafuente, A; Loosmore, G; Reyes, S; Moses, G A; Fratoni, M; Flowers, D; Aceves, S; Rhodes, M; Kane, J; Scott, H; Kramer, R; Pantano, C; Scullard, C; Sawicki, R; Wilks, S; Mehl, M

2010-12-07T23:59:59.000Z

130

Characterization of a multi-axis ion chamber array  

Science Conference Proceedings (OSTI)

Purpose: The aim of this work was to characterize a multi-axis ion chamber array (IC PROFILER; Sun Nuclear Corporation, Melbourne, FL USA) that has the potential to simplify the acquisition of LINAC beam data. Methods: The IC PROFILER (or panel) measurement response was characterized with respect to radiation beam properties, including dose, dose per pulse, pulse rate frequency (PRF), and energy. Panel properties were also studied, including detector-calibration stability, power-on time, backscatter dependence, and the panel's agreement with water tank measurements [profiles, fractional depth dose (FDD), and output factors]. Results: The panel's relative deviation was typically within ({+-}) 1% of an independent (or nominal) response for all properties that were tested. Notable results were (a) a detectable relative field shape change of {approx}1% with linear accelerator PRF changes; (b) a large range in backscatter thickness had a minimal effect on the measured dose distribution (typically less than 1%); (c) the error spread in profile comparison between the panel and scanning water tank (Blue Phantom, CC13; IBA Schwarzenbruck, DE) was approximately ({+-}) 0.75%. Conclusions: The ability of the panel to accurately reproduce water tank profiles, FDDs, and output factors is an indication of its abilities as a dosimetry system. The benefits of using the panel versus a scanning water tank are less setup time and less error susceptibility. The same measurements (including device setup and breakdown) for both systems took 180 min with the water tank versus 30 min with the panel. The time-savings increase as the measurement load is increased.

Simon, Thomas A.; Kozelka, Jakub; Simon, William E.; Kahler, Darren; Li, Jonathan; Liu, Chihray [Department of Nuclear and Radiological Engineering, University of Florida, 202 Nuclear Science Building, Gainesville, Florida 32611-8300 (United States); Department of Radiation Oncology, Health Science Center, University of Florida, P.O. Box 100385, Gainesville, Florida 32610-0385 (United States) and Sun Nuclear Corporation, 425-A Pineda Court, Melbourne, Florida 32940 (United States); Sun Nuclear Corporation, 425-A Pineda Court, Melbourne, Florida 32940 (United States); Department of Radiation Oncology, Health Science Center, University of Florida, P.O. Box 100385, Gainesville, Florida 32610-0385 (United States)

2010-11-15T23:59:59.000Z

131

Resistive wall heating due to image current on the beam chamber for a superconducting undulator.  

SciTech Connect

The image-current heating on the resistive beam chamber of a superconducting undulator (SCU) was calculated based on the normal and anomalous skin effects. Using the bulk resistivity of copper for the beam chamber, the heat loads were calculated for the residual resistivity ratios (RRRs) of unity at room temperature to 100 K at a cryogenic temperature as the reference. Then, using the resistivity of the specific aluminum alloy 6053-T5, which will be used for the SCU beam chamber, the heat loads were calculated. An electron beam stored in a storage ring induces an image current on the inner conducting wall, mainly within a skin depth, of the beam chamber. The image current, with opposite charge to the electron beam, travels along the chamber wall in the same direction as the electron beam. The average current in the storage ring consists of a number of bunches. When the pattern of the bunched beam is repeated according to the rf frequency, the beam current may be expressed in terms of a Fourier series. The time structure of the image current is assumed to be the same as that of the beam current. For a given resistivity of the chamber inner wall, the application ofthe normal or anomalous skin effect will depend on the harmonic numbers of the Fourier series of the beam current and the temperature of the chamber. For a round beam chamber with a ratius r, much larger than the beam size, one can assume that the image current density as well as the density square, may be uniform around the perimeter 2{pi}r. For the SCU beam chamber, which has a relatively narrow vertical gap compared to the width, the effective perimeter was estimated since the heat load should be proportional to the inverse of the perimeter.

Kim, S. H. (Accelerator Systems Division (APS))

2012-03-27T23:59:59.000Z

132

Four-Button BPM Coefficients in Cylindrical and Elliptic Beam Chambers  

E-Print Network (OSTI)

Beam position monitor (BPM) coefficients are calculated from induced charges on four-button BPMs in circular and elliptic beam chambers for ?>> 1. Since the beam chamber cross-section for the APS storage ring is different from an exact elliptic geometry, numerical values of the BPM coefficients and their inversions are computed from two-dimensional electrostatic field distributions inside an exact geometry of the beam chamber. Utilizing Greens reciprocation theorem, a potential value is applied to the buttons rather than changing the beam position, and potential distributions corresponding to the beam positions are then computed. 1. Cylindrical Chamber A charged particle beam of short bunches induces charges on the beam chamber wall. Due to the Lorentz contraction, for ?>> 1, where ? is the relativistic factor, these charges have the same longitudinal intensity modulation as the beam. The electromagnetic fields associated with the beam are obtained by the Lorentz transformation from the fixed lab frame F to a moving reference frame F', where the charged beam is at rest [1, 2]. The field distribution inside the beam chamber becomes an electrostatic problem in the moving reference frame. Here we assume that the buttons are installed flush with the inner surface of the beam chamber, with the chamber having constant crosssection and the chamber wall at a uniform potential. For the charge density of a filament beam located at (xo,yo) in the transverse plane of the Cartesian coordinates and moving with a wave number k in the longitudinal direction z in the lab frame F, ? = ? ( x, y) cos k( z ? vt); (1) k

S. H. Kim

1999-01-01T23:59:59.000Z

133

Four-button BPM coefficients in cylindrical and elliptic beam chambers.  

Science Conference Proceedings (OSTI)

Beam position monitor (BPM) coefficients are calculated from induced charges on four-button BPMs in circular and elliptic beam chambers for {gamma} >>1. Since the beam chamber cross-section for the APS storage ring is different from an exact elliptic geometry, numerical values of the BPM coefficients and their inversions are computed from two-dimensional electrostatic field distributions inside an exact geometry of the beam chamber. Utilizing Green's reciprocation theorem, a potential value is applied to the buttons rather than changing the beam position, and potential distributions corresponding to the beam positions are then computed.

Kim, S.H.

1999-04-08T23:59:59.000Z

134

Enclosed Chambers for Humidity Control And Sample Containment in Fiber Diffraction  

Science Conference Proceedings (OSTI)

A chamber and stretch frame for making fibers for diffraction is described. The chamber is made from a simple plastic cuvette with silicon nitride windows. It is suitable for maintaining constant humidity during fiber drying and data collection, and allows stretching of the fiber and exposure to magnetic fields during sample preparation. If necessary, it provides primary containment for toxic and infectious biological materials. The chamber has been used in fiber diffraction experiments with filamentous plant viruses and a yeast prion protein, and is shown to produce excellent orientation and to maintain hydration and order at the molecular level.

McDonald, M.; Kendall, A.; Tanaka, M.; Weissman, J.S.; Stubbs, G.

2009-05-26T23:59:59.000Z

135

High Accuracy, Two-Dimensional Read-Out in Multiwire Proportional Chambers  

DOE R&D Accomplishments (OSTI)

In most applications of proportional chambers, especially in high-energy physics, separate chambers are used for measuring different coordinates. In general one coordinate is obtained by recording the pulses from the anode wires around which avalanches have grown. Several methods have been imagined for obtaining the position of an avalanche along a wire. In this article a method is proposed which leads to the same range of accuracies and may be preferred in some cases. The problem of accurate measurements for large-size chamber is also discussed.

Charpak, G.; Sauli, F.

1973-02-14T23:59:59.000Z

136

On the property of measurements with the PTW microLion chamber in continuous beams  

Science Conference Proceedings (OSTI)

Purpose: The performance of liquid ionization chambers, which may prove to be useful tools in the field of radiation dosimetry, is based on several chamber and liquid specific characteristics. The present work investigates the performance of the PTW microLion liquid ionization chamber with respect to recombination losses and perturbations from ambient electric fields at various dose rates in continuous beams. Methods: In the investigation, experiments were performed using two microLion chambers, containing isooctane (C{sub 8}H{sub 18}) and tetramethylsilane [Si(CH{sub 3}){sub 4}] as the sensitive media, and a NACP-02 monitor chamber. An initial activity of approximately 250 GBq {sup 18}F was employed as the radiation source in the experiments. The initial dose rate in each measurement series was estimated to 1.0 Gy min{sup -1} by Monte Carlo simulations and the measurements were carried out during the decay of the radioactive source. In the investigation of general recombination losses, employing the two-dose-rate method for continuous beams, the liquid ionization chambers were operated at polarizing voltages 25, 50, 100, 150, 200, and 300 V. Furthermore, measurements were also performed at 500 V polarizing voltage in the investigation of the sensitivity of the microLion chamber to ambient electric fields. Results: The measurement results from the liquid ionization chambers, corrected for general recombination losses according to the two-dose-rate method for continuous beams, had a good agreement with the signal to dose linearity from the NACP-02 monitor chamber for general collection efficiencies above 70%. The results also displayed an agreement with the theoretical collection efficiencies according to the Greening theory, except for the liquid ionization chamber containing isooctane operated at 25 V. At lower dose rates, perturbations from ambient electric fields were found in the microLion chamber measurement results. Due to the perturbations, measurement results below an estimated dose rate of 0.2 Gy min{sup -1} were excluded from the present investigation of the general collection efficiency. The perturbations were found to be more pronounced when the chamber polarizing voltage was increased. Conclusions: By using the two-dose-rate method for continuous beams, comparable corrected ionization currents from experiments in low and medium energy photon beams can be achieved. However, the valid range of general collection efficiencies has been found to vary in a comparison between experiments performed in continuous beams of 120 kVp x ray, and the present investigation of 511 keV annihilation photons. At very high dose rates in continuous beams, there are presently no methods that can be used to correct for general recombination losses and at low dose rates the microLion chamber may be perturbed by ambient electric fields. Increasing the chamber polarizing voltage, which diminishes the general recombination effect, was found to increase the microLion chamber sensitivity to ambient electric fields. Prudence is thus advised when employing the microLion chamber in radiation dosimetry, as ambient electric fields of the strength observed in the present work may be found in many common situations. Due to uncertainties in the theoretical basis for recombination losses in liquids, further studies on the underlying theories for the initial and general recombination effect are needed if liquid ionization chambers are to become a viable option in high precision radiation dosimetry.

Andersson, Jonas; Johansson, Erik; Toelli, Heikki [Department of Radiation Sciences, Radiation Physics, Umea University, SE-901 85 Umea (Sweden); Swedish Defense Research Agency, FOI CBRN Defense and Security, SE-901 82 Umea (Sweden); Department of Radiation Sciences, Radiation Physics, Umea University, SE-901 85 Umea (Sweden)

2012-08-15T23:59:59.000Z

137

Neutron And Gamma Detector Using An Ionization Chamber With An Integrated  

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

Neutron And Gamma Detector Using An Ionization Chamber Neutron And Gamma Detector Using An Ionization Chamber Neutron And Gamma Detector Using An Ionization Chamber With An Integrated Body And Moderator A detector for detecting neutrons and gamma radiation includes a cathode that defines an interior surface and an interior volume. Available for thumbnail of Feynman Center (505) 665-9090 Email Neutron And Gamma Detector Using An Ionization Chamber With An Integrated Body And Moderator A detector for detecting neutrons and gamma radiation includes a cathode that defines an interior surface and an interior volume. A conductive neutron-capturing layer is disposed on the interior surface of the cathode and a plastic housing surrounds the cathode. A plastic lid is attached to the housing and encloses the interior volume of the cathode forming an

138

Method of correcting eddy current magnetic fields in particle accelerator vacuum chambers  

DOE Patents (OSTI)

A method for correcting magnetic field aberrations produced by eddy currents induced in a particle accelerator vacuum chamber housing is provided wherein correction windings are attached to selected positions on the housing and the windings are energized by transformer action from secondary coils, which coils are inductively coupled to the poles of electro-magnets that are powered to confine the charged particle beam within a desired orbit as the charged particles are accelerated through the vacuum chamber by a particle-driving rf field. The power inductively coupled to the secondary coils varies as a function of variations in the power supplied by the particle-accelerating rf field to a beam of particles accelerated through the vacuum chamber, so the current in the energized correction coils is effective to cancel eddy current flux fields that would otherwise be induced in the vacuum chamber by power variations in the particle beam.

Danby, Gordon T. (Wading River, NY); Jackson, John W. (Shoreham, NY)

1991-01-01T23:59:59.000Z

139

Method of correcting eddy current magnetic fields in particle accelerator vacuum chambers  

DOE Patents (OSTI)

A method for correcting magnetic field aberrations produced by eddy currents induced in a particle accelerator vacuum chamber housing is provided wherein correction windings are attached to selected positions on the housing and the windings are energized by transformer action from secondary coils, which coils are inductively coupled to the poles of electro-magnets that are powered to confine the charged particle beam within a desired orbit as the charged particles are accelerated through the vacuum chamber by a particle-driving rf field. The power inductively coupled to the secondary coils varies as a function of variations in the power supplied by the particle-accelerating rf field to a beam of particles accelerated through the vacuum chamber, so the current in the energized correction coils is effective to cancel eddy current flux fields that would otherwise be induced in the vacuum chamber by power variations (dB/dt) in the particle beam.

Danby, G.T.; Jackson, J.W.

1990-03-19T23:59:59.000Z

140

Space Chamber Reaches Cold Target at Unprecedented Efficiency | U.S. DOE  

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

Space Chamber Reaches Cold Target at Unprecedented Efficiency Space Chamber Reaches Cold Target at Unprecedented Efficiency Nuclear Physics (NP) NP Home About Research Facilities Science Highlights Benefits of NP 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 » October 2012 Space Chamber Reaches Cold Target at Unprecedented Efficiency Thomas Jefferson Laboratory lends expertise in cryogenics developments. Print Text Size: A A A Subscribe FeedbackShare Page Click to enlarge photo. Enlarge Photo Image courtesy of NASA NASA's Space Environment Simulation Lab Chamber A, which is used by the

Note: This page contains sample records for the topic "xmcd chamber 6t" 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

A Rapid-Circulation Evaporation Chamber for Measuring Bulk Stomatal Resistance  

Science Conference Proceedings (OSTI)

A relatively simple method is described for determining evaporation of short vegetation at any moment of time. The method is based on the measurement of bulk stomatal resistance of the crop with an evaporation chamber. Once this quantity is known,...

W. Kohsiek

1981-01-01T23:59:59.000Z

142

Condensation Coefficient Measurement for Water in the UMR Cloud Simulation Chamber  

Science Conference Proceedings (OSTI)

A systematic series of condensation coefficient measurements of water have been made using the University of MissouriRolla cooled-wall expansion chamber which simulates the thermodynamics of cloud. This coefficient is seen to decrease from a ...

D. E. Hagen; J. Schmitt; M. Trueblood; J. Carstens; D. R. White; D. J. Alofs

1989-03-01T23:59:59.000Z

143

Potential applications of the natural design of internal explosion chambers in the bombardier beetle (Carabidae, Brachinus)  

E-Print Network (OSTI)

The Bombardier Beetle (Carabidae, Brachinus) has a unique form of defense mechanism which involves the explosive mixing of hydroquinones and hydrogen peroxide in its internal explosion chambers and using the resultant high ...

Lai, Changquan

2010-01-01T23:59:59.000Z

144

Dual-chamber plasma deposition of A-Si:H solar cells at high rates using disilane  

SciTech Connect

The use of a separated chamber deposition system for the fabrication of a-Si:H solar cells from disilane at high deposition rates results in a substantial improvement in short circuit current compared to that obtained from a single-chamber system. The spectral responses of cells fabricated in the dual-chamber mode are compared to those made in the single-chamber mode. The results are interpreted by assuming that the rate of removal of boron contaminants from the chamber is independent of deposition rate.

Rajeswaran, G.; Vanier, P.E.; Corderman, R.R.; Kampas, F.J.

1985-01-01T23:59:59.000Z

145

Directional Detection of Fast Neutrons Using a Time Projection Chamber  

Science Conference Proceedings (OSTI)

Spontaneous fission in Special Nuclear Material (SNM) such as plutonium and highly enriched uranium (HEU) results in the emission of neutrons with energies in the MeV range (hereafter 'fast neutrons'). These fast neutrons are largely unaffected by the few centimeters of intervening high-Z material that would suffice for attenuating most emitted gamma rays, while tens of centimeters of hydrogenous materials are required to achieve substantial attenuation of neutron fluxes from SNM. Neutron detectors are therefore an important complement to gamma-ray detectors in SNM search and monitoring applications. The rate at which SNM emits fast neutrons varies from about 2 per kilogram per second for typical HEU to some 60,000 per kilogram per second for metallic weapons grade plutonium. These rates can be compared with typical sea-level (cosmogenic) neutron backgrounds of roughly 5 per second per square meter per steradian in the relevant energy range [1]. The fact that the backgrounds are largely isotropic makes directional neutron detection especially attractive for SNM detection. The ability to detect, localize, and ultimately identify fast neutron sources at standoff will ultimately be limited by this background rate. Fast neutrons are particularly well suited to standoff detection and localization of SNM or other fast neutrons sources. Fast neutrons have attenuation lengths of about 60 meters in air, and retain considerable information about their source direction even after one or two scatters. Knowledge of the incoming direction of a fast neutron, from SNM or otherwise, has the potential to significantly improve signal to background in a variety of applications, since the background arriving from any one direction is a small fraction of the total background. Imaging or directional information therefore allows for source detection at a larger standoff distance or with shorter dwell times compared to nondirectional detectors, provided high detection efficiency can be maintained. Directional detection of neutrons has been previously considered for applications such as controlled fusion neutron imaging [2], nuclear fuel safety research [3], imaging of solar neutrons and SNM [4], and in nuclear science [5]. The use of scintillating crystals and fibers has been proposed for directional neutron detection [6]. Recently, a neutron scatter camera has been designed, constructed, and tested for imaging of fast neutrons, characteristic for SNM material fission [7]. The neutron scatter camera relies on the measurement of the proton recoil angle and proton energy by time of flight between two segmented solid-state detectors. A single-measurement result from the neutron scatter camera is a ring containing the possible incident neutron direction. Here we describe the development and commissioning of a directional neutron detection system based on a time projection chamber (TPC) detector. The TPC, which has been widely used in particle and nuclear physics research for several decades, provides a convenient means of measuring the full 3D trajectory, specific ionization (i.e particle type) and energy of charged particles. For this application, we observe recoil protons produced by fast neutron scatters on protons in hydrogen or methane gas. Gas pressures of a few ATM provide reasonable neutron interaction/scattering rates.

Bowden, N; Heffner, M; Carosi, G; Carter, D; Foxe, M; Jovanovic, I

2009-06-03T23:59:59.000Z

146

Photon stimulated desorption measurement of an extruded aluminum beam chamber for the Advanced Photon Source  

DOE Green Energy (OSTI)

The Advanced Photon Source (APS), presently being commisioned, will produce X-ray s of unprecedented brightness. The high energy ring of the APS is a 7 GeV positron storage ring, 1104 meters in circumference designed to operate at less than 10{sup {minus}9} Torr with 300 ma of beam and a greater than 10 hour lifetime. The storage ring vacuum chamber is constructed from an extruded 6063 aluminum alloy. During the construction phase, a 2.34 m long section of the APS extruded aluminum chamber was set up on National Synchrotron Light Source (NSLS) X-ray Beamlline X28A and Photon Stimulated Desorption (PSD) was measured. Cleaning and preparation of the chamber was identical to that of the APS construction. In addition to the chamber, small samples of M, Be, and Cu were also exposed to white light having a critical energy of 5 keV. In addition to PSD, measurements were made of specular and diffuse scattering of photons. The chamber and samples were each exposed to a dose greater than 10{sup 23} photons per meter. Desorption yields for H{sub 2}, CO, CO{sub 2}, CH{sub 4} and H{sub 2}0 are reported as a function of accumulated flux, critical energy, incidence angle, and preparation. These results are compared with previous results for aluminum on NSLS Beamlline U1OB and PSD results of other laboratories published for aluminum.

Foerster, C.L.; Lanni, C. [Brookhaven National Lab., Upton, NY (United States); Noonan, J.R.; Rosenberg, R.A. [Argonne National Lab., IL (United States)

1995-12-31T23:59:59.000Z

147

Vacuum chamber of the injector synchrotron for the Advanced Photon Source  

Science Conference Proceedings (OSTI)

The 40 chambers of the 368 m, 7-GeV injector synchrotron of the Advanced Photon Source are made from 1 mm-thick, 316LN stainless steel tubing. Tubes are cold-drawn to an elliptical shape with inside major and minor axes of 6 cm and 3.7 cm, respectively. This results in a thin metallic chamber without corrugations, which allows maximum beam space in the magnets and withstands atmospheric pressure. Sections of the chamber are bent to match the radius of curvature (33.3 m) of the beam over the entire effective length of the dipole magnets. A modified orbital welder is used to join sections of tubing. The chambers and the pumping system required to achieve a pressure of 10{sup {minus}9} Torr are described. A straight section of chamber tubing was tested under external pressure up to 60 psig. At 15 psig, the resulting deflection at the minor half axis was 0.2mm and a maximum compressive stress of 13,500 psi was measured. Tube deformation remained in the elastic region up to {approximately}38 psig. 4 refs., 2 figs.

Benaroya, R.; Dortwegt, R.

1991-01-01T23:59:59.000Z

148

Single Particle Laser Mass Spectrometry Applied to Differential Ice Nucleation Experiments at the AIDA Chamber  

SciTech Connect

Experiments conducted at the Aerosol Interactions and Dynamics in the Atmosphere (AIDA) chamber located in Karlsruhe, Germany permit investigation of particle properties that affect the nucleation of ice at temperature and water vapor conditions relevant to cloud microphysics and climate issues. Ice clouds were generated by heterogeneous nucleation of Arizona test dust (ATD), illite, and hematite and homogeneous nucleation of sulfuric acid. Ice crystals formed in the chamber were inertially separated from unactivated, or interstitial aerosol particles with a pumped counterflow virtual impactor (PCVI), then evaporated. The ice residue (i.e., the aerosol which initiated ice nucleation plus any material which was scavenged from the gas- and/or particle-phase), was chemically characterized at the single particle level using a laser ionization mass spectrometer. In this manner the species that first nucleated ice could be identified out of a mixed aerosol population in the chamber. Bare mineral dust particles were more effective ice nuclei (IN) than similar particles with a coating. Metallic particles from contamination in the chamber initiated ice nucleation before other species but there were few enough that they did not compromise the experiments. Nitrate, sulfate, and organics were often detected on particles and ice residue, evidently from scavenging of trace gas-phase species in the chamber. Hematite was a more effective ice nucleus than illite. Ice residue was frequently larger than unactivated test aerosol due to the formation of aggregates due to scavenging, condensation of contaminant gases, and the predominance of larger aerosol in nucleation.

Gallavardin, S. J.; Froyd, Karl D.; Lohmann, U.; Moehler, Ottmar; Murphy, Daniel M.; Cziczo, Dan

2008-08-26T23:59:59.000Z

149

OSTIblog Posts by Kathy Chambers | OSTI, US Dept of Energy, Office of  

Office of Scientific and Technical Information (OSTI)

Kathy Chambers Kathy Chambers Kathy Chambers's picture Senior STI Specialist, Information International Associates, Inc. Enjoy the benefits of LED lighting Source: http://www.flickr.com/photos/uscapitol/6309229615/in/photostream/ Published on Dec 30, 2013 Every day we are bombarded with advertisements in every form and format telling us that our lives will be improved if we buy a particular product because it will save us money, reduce our work effort, save us energy, or benefit the environment. We are justifiably skeptical because we know from experience that if something sounds too good to be true, usually it is. Light-emitting diode (LED) lighting is one of the exceptions. LEDs benefits are so powerful that they seem too good to be true; however, they actually do save us money, reduce our work effort, save us energy and benefit our environment.

150

U.S. Chamber of Commerce Biofuels Dialogue Series: Outlook for an Emerging  

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

Commerce Biofuels Dialogue Series: Outlook for an Commerce Biofuels Dialogue Series: Outlook for an Emerging Global Biofuels Market U.S. Chamber of Commerce Biofuels Dialogue Series: Outlook for an Emerging Global Biofuels Market January 29, 2008 - 10:53am Addthis Remarks as Prepared For Delivery by Secretary Bodman Thank you very much, Bruce, for that kind introduction. My thanks also to Tom Donahue and the leadership of the Chamber for inviting me to be with you today. I was quite pleased to hear that the Chamber was sponsoring this event. As anyone who knows me - or has heard me speak recently - can tell you, the biofuels industry is a favorite topic of mine. In my view, advanced biofuels offer tremendous promise for helping our nation to bring about a new energy future-one that is cleaner, more sustainable, more affordable,

151

Stability of A-150 plastic ionization chamber response over a ~30 year period  

SciTech Connect

At the NIU Institute for Neutron Therapy at Fermilab, the clinical tissue-equivalent ionization chamber response is measured every treatment day using a cesium source that was configured to match readings obtained at the National Bureau of Standards. Daily measurements are performed in air using the air-to-tissue dose conversion factors given in AAPM Report no. 7. The measured exposure calibration factors have been tabulated and graphed as a function of time from 1978 to present. For A-150 plastic ionization chambers, these factors exhibit a sinusoidal variation with a period of approximately one year and amplitude of {+-} 1%. This variation, attributable to the hygroscopic nature of A-150 plastic, is correlated with the relative humidity of the facility, and is greater than the humidity corrections for gas described in the literature. Our data suggest that chamber calibration should be performed at least weekly to accommodate these variations.

Kroc, Thomas K.; Lennox, Arlene J.; /Fermilab

2007-08-01T23:59:59.000Z

152

Small-Chamber Measurements of Chemical-Specific Emission Factors for  

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

Small-Chamber Measurements of Chemical-Specific Emission Factors for Small-Chamber Measurements of Chemical-Specific Emission Factors for Drywall Title Small-Chamber Measurements of Chemical-Specific Emission Factors for Drywall Publication Type Report Year of Publication 2010 Authors Maddalena, Randy L., Marion L. Russell, Moya Melody, and Michael G. Apte Publisher Lawrence Berkeley National Laboratory City Berkeley Abstract Imported drywall installed in U.S. homes is suspected of being a source of odorous and potentially corrosive indoor pollutants. To support an investigation of those building materials by the Consumer Products Safety Commission (CPSC), Lawrence Berkeley National Laboratory (LBNL) measured chemical-specific emission factors for 30 samples of drywall materials. Emission factors are reported for 75 chemicals and 30 different drywall samples encompassing both domestic and imported stock and incorporating natural, synthetic, or mixed gypsum core material. CPSC supplied all drywall materials. First the drywall samples were isolated and conditioned in dedicated chambers, then they were transferred to small chambers where emission testing was performed. Four sampling and analysis methods were utilized to assess (1) volatile organic compounds, (2) low molecular weight carbonyls, (3) volatile sulfur compounds, and (4) reactive sulfur gases. LBNL developed a new method that combines the use of solid phase microextraction (SPME) with small emission chambers to measure the reactive sulfur gases, then extended that technique to measure the full suite of volatile sulfur compounds. The testing procedure and analysis methods are described in detail herein. Emission factors were measured under a single set of controlled environmental conditions. The results are compared graphically for each method and in detailed tables for use in estimating indoor exposure concentrations

153

Calibration and performance of a secondary emission chamber as a beam intensity monitor  

DOE Green Energy (OSTI)

We report on a study of the behavior of a secondary emission chamber (SEC). We show the dependence of the SEC signal on the charge and velocity of the primary beam for beams of protons, and heavy ions including Helium, Neon, Chlorine and Iron. We fill the SEC with a selection of different gases including Hydrogen, Helium, Nitrogen, Argon, and air, studying the SEC response when it is acting as an ion chamber. We also investigate the behavior of the SEC at intermediate pressures between 10{sup -8} torr and atmospheric pressure. The SEC uses thin conducting foils as the source and collector of electrons in a vacuum chamber. When charged particles traverse the vacuum chamber, they pass through a series of thin conducting foils, alternating anode and cathode. Ionization produced in the cathode foils travels across the intervening gap due to an applied high voltage and is collected on the anode foils. Electron production is very inefficient because most of the ionization in the foils remains trapped within the foil due to the short range of most delta-rays and the work function of the foil. It is this inefficiency that allows the SEC to operate at high dose rates and short pulse duration where the standard ion chambers cannot function reliably. The SEC was placed in the NSRL ion beam to receive a variety of heavy ion beams under different beam conditions. We used these ion beams to study the response of the SEC to different species of heavy ion, comparing with proton beams. We studied the response to beam of different energies, and as a function of different counting rate. We compared the behaviour of the SEC when operating under positive and negative high voltage. The SEC can operate as an ion chamber if it is filled with gas. We measured the response of the SEC when filled with a variety of gases, from Hydrogen to Helium, Nitrogen, Argon and air. The performance of the SEC as an ion chamber is compared with the standard NSRL ion chamber, QC3. By evacuating the SEC and filling it with Nitrogen through an adjustable leak valve, we were able to measure the response of the SEC to beam as a function of gas pressure. Many interesting features of the SEC were revealed in these tests.

Sivertz, M.; Chiang, I-H,; Rusek, A.

2011-03-28T23:59:59.000Z

154

Investigation of long drift chambers for a nucleon-decay detector  

SciTech Connect

The use of long drift chambers for a nucleon-decay detector is discussed as a means of achieving a detector with very fine tracking, but with a modest number of readout channels. Strategies for reducing the attenuation of drifting electrons are considered, particularly the necessity of shaping the electric field to reduce the effects of diffusion and of nearby grounded conductors. Measured results are presented for a chamber with 1 cm drift gap and 50 cm maximum drift distance. The measured attenuation is 12%.

Price, L.E.; Dawson, J.; Ayres, D.; Denis, R.S.

1981-01-01T23:59:59.000Z

155

Numerical Simulation of Earth Pressure on Head Chamber of Shield Machine with FEM  

SciTech Connect

Model parameters of conditioned soils in head chamber of shield machine are determined based on tree-axial compression tests in laboratory. The loads acting on tunneling face are estimated according to static earth pressure principle. Based on Duncan-Chang nonlinear elastic constitutive model, the earth pressures on head chamber of shield machine are simulated in different aperture ratio cases for rotating cutterhead of shield machine. Relationship between pressure transportation factor and aperture ratio of shield machine is proposed by using aggression analysis.

Li Shouju; Kang Chengang [State Key Laboratory of structural analysis for industrial equipment, Dalian University of Technology, Dalian 116023 (China); Sun, Wei [School of Mechanical Engineering, Dalian University of Technology, Dalian 116023 (China); Shangguan Zichang [School of Civil and Hydraulic Engineering, Dalian University of Technology, Dalian 116023 (China); Institute of Civil Engineering, Dalian Fishery University, Dalian 116023 (China)

2010-05-21T23:59:59.000Z

156

THE TREATMENT OF THE TRUMPET IN SELECTED JAZZ-INFLUENCED CLASSICAL CHAMBER WORKS OF THE TWENTIETH CENTURY.  

E-Print Network (OSTI)

??The trumpet has always maintained a central role in the jazz genre. However, throughout the history of chamber music the trumpet was overlooked until the (more)

Harrison, Kathleen Elizabeth

2009-01-01T23:59:59.000Z

157

Dynamics of neutralizing electrons during the focusing of intense heavy ions beams inside a heavy fusion reactor chamber  

E-Print Network (OSTI)

beams inside a heavy ion fusion reactor chamber * Agustin F.of a Heavy Ion Fusion reactor heavily depends on the maximum

Lifschitz, Agustin F.; Maynard, Gilles; Vay, Jean-Luc; Lenglet, Andrian

2006-01-01T23:59:59.000Z

158

Dynamics of neutralizing electrons during the focusing of intense heavy ions beams inside a heavy fusion reactor chamber  

E-Print Network (OSTI)

beams inside a heavy ion fusion reactor chamber * Agustin F.efficiency of a Heavy Ion Fusion reactor heavily depends on

Lifschitz, Agustin F.; Maynard, Gilles; Vay, Jean-Luc; Lenglet, Andrian

2006-01-01T23:59:59.000Z

159

Neutronics Assessment of Blanket Options for the HAPL Laser Inertial Fusion Energy Chamber  

E-Print Network (OSTI)

on lasers, direct drive targets and a dry wall chamber [1]. A primary focus is the development of a tungsten-armored-explosion. Only a thin region of the armor (10-100 µm) will experience the highly cyclic x-ray and ion energy deposition transients. The FW structure behind the armor as well as the blanket will operate under quasi

Raffray, A. René

160

Report on Fission Time Projection Chamber M3FT-12IN0210052  

Science Conference Proceedings (OSTI)

The Time Projection Chamber is a collaborative effort to implement an innovative approach and deliver unprecedented fission measurements to DOE programs. This 4?-detector system will provide unrivaled 3-D data about the fission process. Shown here is a half populated TPC (2?) at the LLNL TPC laboratory as it undergoes testing before being shipped to LANSCE for beam experiments.

James K. Jewell

2012-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "xmcd chamber 6t" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

Fault Detection and Isolation of a Cryogenic Rocket Engine Combustion Chamber Using a Parity Space Approach  

Science Conference Proceedings (OSTI)

his paper presents a parity space (PS) approach for fault detection and isolation (FDI) of a cryogenic rocket engine combustion chamber. Nominal and non-nominal simulation data for three engine set points have been provided. The PS approach uses three ... Keywords: Fault Detection, Fault Isolation, Fault Diagnosis, Parity Space, Rocket Engine

Paul van Gelder; Andr Bos

2009-07-01T23:59:59.000Z

162

Modeling and Simulation of 1025t/h CFBB Combustion Chamber  

Science Conference Proceedings (OSTI)

This paper takes CFBB as simulating object, which has characters of DG1025/17.4-II1 two legs furnace and with external heat exchanger. Combined with thermal process and combustion chamber working characteristics of practical unit, a general dynamic model ... Keywords: CFB, combustion, modeling, simulation

Chang-liang Liu; Yuan-liang Ma; Lin Chen

2008-10-01T23:59:59.000Z

163

In situ reduction and evaluation of anode supported single chamber solid oxide fuel cells  

E-Print Network (OSTI)

cracking (reaction VII) CH4 + H2O CO + 3H2 steam reforming (reaction VIII) CH4 + CO2 2CO + 2H2 dry.05.118 #12;Abstract Single chamber anode-supported fuel cells are investigated under several methane analyses of anode reduction are performed at 700°C. Carbon deposition is observed under diluted methane

164

Combustion chamber for gas turbines and the like having a fluidized burner bed  

SciTech Connect

A combustion chamber with a fluidized burner bed preferably for gas turbines is described. It contains means for controlling the supply of fuel, combustion air and a cooling medium for the fluidized bed to maintain a predetermined proportional relationship between combustion air and cooling air under varying load conditions.

Harboe, H.

1975-12-09T23:59:59.000Z

165

Nested reactor chamber and operation for Hg-196 isotope separation process  

DOE Patents (OSTI)

The present invention is directed to an apparatus for use in .sup.196 Hg separation and its method of operation. Specifically, the present invention is directed to a nested reactor chamber useful for .sup.196 Hg isotope separation reactions avoiding the photon starved condition commonly encountered in coaxial reactor systems.

Grossman, Mark W. (Belmont, MA)

1991-01-01T23:59:59.000Z

166

A Diffusion Cloud Chamber Study of Very Slow Mesons. II. Beta Decay of the Muon  

DOE R&D Accomplishments (OSTI)

The spectrum of electrons arising from the decay of the negative mu meson has been determined. The muons are arrested in the gas of a high pressure hydrogen filled diffusion cloud chamber. The momenta of the decay electrons are determined from their curvature in a magnetic field of 7750 gauss. The spectrum of 415 electrons has been analyzed according to the theory of Michel.

Lederman, L. M.; Sargent, C. P.; Rinehart, M.; Rogers, K.

1955-03-00T23:59:59.000Z

167

Pulse mode readout techniques for use with non-gridded industrial ionization chambers  

SciTech Connect

Highly sensitive readout technique for precision long-term radiation measurements has been developed and tested in the Radiation Control Department at Jefferson Lab. The new electronics design is used to retrieve ionization data in a pulse mode. The dedicated data acquisition system works with M=Audio Audiophile 192 High-Definition 24-bit/192 kHz audio cards, taking data in continuous waveform recording mode. The on-line data processing algorithms extract signals of the ionization events from the data flow and measure the ionization value for each event. Two different ion chambers are evaluated. The first is a Reuter-Stokes Argon-filled (at 25 atm) High Pressure Ionization Chamber (HPIC), commonly used as a detector part in many GE Reuter-Stokes instruments of the RSS series. The second is a VacuTec Model 70181, 5 atm Xenon-filled ionization chamber. Results for both chambers indicate that the techniques allow using industrial ICs for high sensitivity and precision long-term radiation measurements, while at the same time providing information about spectral characteristics of the radiation fields.

Popov, Vladimir E. [JLAB; Degtiarenko, Pavel V. [JLAB

2011-10-01T23:59:59.000Z

168

LASER IFE DIRECT DRIVE CHAMBER CONCEPTS WITH MAGNETIC INTERVENTION A. R. Raffray1  

E-Print Network (OSTI)

, Washington, DC 20375, aerobson@earthlink.net 3 Naval Research Laboratory, Washington, DC 20375, john, Washington, D.C. REFERENCES 1. J. SETHIAN, et al., "An Overview of the Development of the First Wall. RAFFRAY and the HAPL Team, "Threats, Design Limits and Design Windows for Laser IFE Dry Wall Chambers," J

Raffray, A. René

169

Improving the performance and fuel consumption of dual chamber stratified charge spark ignition engines  

DOE Green Energy (OSTI)

A combined experimental and theoretical investigation of the nature of the combustion processes in a dual chamber stratified charge spark ignition engine is described. This work concentrated on understanding the mixing process in the main chamber gases. A specially constructed single cylinder engine was used to both conduct experiments to study mixing effects and to obtain experimental data for the validation of the computer model which was constructed in the theoretical portion of the study. The test procedures are described. Studies were conducted on the effect of fuel injection timing on performance and emissions using the combination of orifice size and prechamber to main chamber flow rate ratio which gave the best overall compromise between emissions and performance. In general, fuel injection gave slightly higher oxides of nitrogen, but considerably lower hydrocarbon and carbon monoxide emissions than the carbureted form of the engine. Experiments with engine intake port redesign to promote swirl mixing indicated a substantial increase in the power output from the engine and, that an equivalent power levels, the nitric oxide emissions are approximately 30% lower with swirl in the main chamber than without swirl. The development of a computer simulation of the combustion process showed that a one-dimensional combustion model can be used to accurately predict trends in engine operation conditions and nitric oxide emissions even though the actual flame in the engine is not completely one-dimensional, and that a simple model for mixing of the main chamber and prechamber intake gases at the start of compression proved adequate to explain the effects of swirl, ignition timing, overall fuel air ratio, volumetric efficiency, and variations in prechamber air fuel ratio and fuel rate percentage on engine power and nitric oxide emissions. (LCL)

Sorenson, S.C.; Pan, S.S.; Bruckbauer, J.J.; Gehrke, G.R.

1979-09-01T23:59:59.000Z

170

Fabrication of The Multi-PCR Chamber With Inner Heat-Sink Materials Using a Micro-Blaster Etching Technique  

Science Conference Proceedings (OSTI)

In this paper, we propose a new design for a PCR (Polymerase Chain Reaction) chamber with a temperature sensor under a top glass wafer and heaters on the bottom glass wafer. These chamber sensors are thermally isolated from the heater. The multi PCR ...

Hyoung-Jin Park; Duk-Soo Eun; Dae-Young Kong; Seong-Jin Kong; Seong-Ho Kong; Jong-Hyun Lee

2005-07-01T23:59:59.000Z

171

LS-266 OPTIMIZATION OF FOUR-BUTTON BEAM POSITION MONITOR CONFIGURATION FOR SMALL-GAP VACUUM CHAMBERS  

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

LS-266 LS-266 OPTIMIZATION OF FOUR-BUTTON BEAM POSITION MONITOR CONFIGURATION FOR SMALL-GAP VACUUM CHAMBERS S. H. Kim March 27, 1998 Summary - Induced charges on a four-button beam position monitor (BPM) system attached on a beam chamber of narrow rectangular cross sections are calculated as a 2-D electrostatic problem of image charges. The calculation shows that for a narrow chamber of width/height (2w/2h) >> 1, over 90% of the induced charges are distributed within a distance of 2h from the charged beam position in the direction of the chamber width. Therefore, a four-button system with a button diameter of (2 ~ 2.5)h and no button offset from the beam position is the most efficient configuration. The four-button BPMs used for 8-mm and 5-mm chambers in the APS have relatively low sensitivities because the button locations are outside

172

Beamline 4.0.2  

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

4.0.2 Print 4.0.2 Print Magnetic spectroscopy Scientific disciplines: Magnetism, materials science Endstations: Eight-pole electromagnet XMCD chamber (6T, 2K) L-edge chamber with superconducting spectrometer GENERAL BEAMLINE INFORMATION Operational Yes Proposal cycle Proposals for General Sciences Beamlines (6-month cycle) Source characteristics 5.0-cm period elliptical polarization undulator (EPU5) Energy range 100-2000 eV Monochromator Variable-included-angle PGM Calculated flux (1.9 GeV, 400 mA) 1 x 1013 photons/s/0.1%BW at 800 eV [Value reported is the merit function, flux = total flux x (degree of circular polarization)2.] Resolving power (E/ΔE) 5,000-10,000 (at source-size limit; energy-dependent) >25,000 (64 eV, 10-mm entrance/exit slits) Special notes Polarization is user selectable; linear polarization continuously variable from horizontal to vertical; left and right elliptical (or circular) polarization.

173

Beamline 4.0.2  

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

2 Print 2 Print Magnetic spectroscopy Scientific disciplines: Magnetism, materials science Endstations: Eight-pole electromagnet XMCD chamber (6T, 2K) L-edge chamber with superconducting spectrometer GENERAL BEAMLINE INFORMATION Operational Yes Proposal cycle Proposals for General Sciences Beamlines (6-month cycle) Source characteristics 5.0-cm period elliptical polarization undulator (EPU5) Energy range 100-2000 eV Monochromator Variable-included-angle PGM Calculated flux (1.9 GeV, 400 mA) 1 x 1013 photons/s/0.1%BW at 800 eV [Value reported is the merit function, flux = total flux x (degree of circular polarization)2.] Resolving power (E/ΔE) 5,000-10,000 (at source-size limit; energy-dependent) >25,000 (64 eV, 10-mm entrance/exit slits) Special notes Polarization is user selectable; linear polarization continuously variable from horizontal to vertical; left and right elliptical (or circular) polarization.

174

Beamline 4.0.2  

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

2 Print 2 Print Magnetic spectroscopy Scientific disciplines: Magnetism, materials science Endstations: Eight-pole electromagnet XMCD chamber (6T, 2K) L-edge chamber with superconducting spectrometer GENERAL BEAMLINE INFORMATION Operational Yes Proposal cycle Proposals for General Sciences Beamlines (6-month cycle) Source characteristics 5.0-cm period elliptical polarization undulator (EPU5) Energy range 100-2000 eV Monochromator Variable-included-angle PGM Calculated flux (1.9 GeV, 400 mA) 1 x 1013 photons/s/0.1%BW at 800 eV [Value reported is the merit function, flux = total flux x (degree of circular polarization)2.] Resolving power (E/ΔE) 5,000-10,000 (at source-size limit; energy-dependent) >25,000 (64 eV, 10-mm entrance/exit slits) Special notes Polarization is user selectable; linear polarization continuously variable from horizontal to vertical; left and right elliptical (or circular) polarization.

175

Beamline 4.0.2  

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

2 Print 2 Print Magnetic spectroscopy Scientific disciplines: Magnetism, materials science Endstations: Eight-pole electromagnet XMCD chamber (6T, 2K) L-edge chamber with superconducting spectrometer GENERAL BEAMLINE INFORMATION Operational Yes Proposal cycle Proposals for General Sciences Beamlines (6-month cycle) Source characteristics 5.0-cm period elliptical polarization undulator (EPU5) Energy range 100-2000 eV Monochromator Variable-included-angle PGM Calculated flux (1.9 GeV, 400 mA) 1 x 1013 photons/s/0.1%BW at 800 eV [Value reported is the merit function, flux = total flux x (degree of circular polarization)2.] Resolving power (E/ΔE) 5,000-10,000 (at source-size limit; energy-dependent) >25,000 (64 eV, 10-mm entrance/exit slits) Special notes Polarization is user selectable; linear polarization continuously variable from horizontal to vertical; left and right elliptical (or circular) polarization.

176

Beamline 4.0.2  

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

2 Print 2 Print Magnetic spectroscopy Scientific disciplines: Magnetism, materials science Endstations: Eight-pole electromagnet XMCD chamber (6T, 2K) L-edge chamber with superconducting spectrometer GENERAL BEAMLINE INFORMATION Operational Yes Proposal cycle Proposals for General Sciences Beamlines (6-month cycle) Source characteristics 5.0-cm period elliptical polarization undulator (EPU5) Energy range 100-2000 eV Monochromator Variable-included-angle PGM Calculated flux (1.9 GeV, 400 mA) 1 x 1013 photons/s/0.1%BW at 800 eV [Value reported is the merit function, flux = total flux x (degree of circular polarization)2.] Resolving power (E/ΔE) 5,000-10,000 (at source-size limit; energy-dependent) >25,000 (64 eV, 10-mm entrance/exit slits) Special notes Polarization is user selectable; linear polarization continuously variable from horizontal to vertical; left and right elliptical (or circular) polarization.

177

Beamline 4.0.2  

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

2 Print 2 Print Magnetic spectroscopy Scientific disciplines: Magnetism, materials science Endstations: Eight-pole electromagnet XMCD chamber (6T, 2K) L-edge chamber with superconducting spectrometer GENERAL BEAMLINE INFORMATION Operational Yes Proposal cycle Proposals for General Sciences Beamlines (6-month cycle) Source characteristics 5.0-cm period elliptical polarization undulator (EPU5) Energy range 100-2000 eV Monochromator Variable-included-angle PGM Calculated flux (1.9 GeV, 400 mA) 1 x 1013 photons/s/0.1%BW at 800 eV [Value reported is the merit function, flux = total flux x (degree of circular polarization)2.] Resolving power (E/ΔE) 5,000-10,000 (at source-size limit; energy-dependent) >25,000 (64 eV, 10-mm entrance/exit slits) Special notes Polarization is user selectable; linear polarization continuously variable from horizontal to vertical; left and right elliptical (or circular) polarization.

178

Beamline 4.0.2  

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

2 Print 2 Print Magnetic spectroscopy Scientific disciplines: Magnetism, materials science Endstations: Eight-pole electromagnet XMCD chamber (6T, 2K) L-edge chamber with superconducting spectrometer GENERAL BEAMLINE INFORMATION Operational Yes Proposal cycle Proposals for General Sciences Beamlines (6-month cycle) Source characteristics 5.0-cm period elliptical polarization undulator (EPU5) Energy range 100-2000 eV Monochromator Variable-included-angle PGM Calculated flux (1.9 GeV, 400 mA) 1 x 1013 photons/s/0.1%BW at 800 eV [Value reported is the merit function, flux = total flux x (degree of circular polarization)2.] Resolving power (E/ΔE) 5,000-10,000 (at source-size limit; energy-dependent) >25,000 (64 eV, 10-mm entrance/exit slits) Special notes Polarization is user selectable; linear polarization continuously variable from horizontal to vertical; left and right elliptical (or circular) polarization.

179

Processing of O.F.E. copper beam chambers for PEP-II high energy ring  

DOE Green Energy (OSTI)

Using laboratory scale and full size PEP-II vacuum chambers, chemical cleaning, glow discharge and thermal process effects were evaluated using surface analysis by x-ray photoelectron spectroscopy (XPS). These processes were optimized to reduce surface carbon and thereby minimize photodesorption gas loads. The relation of surface carbon to ion dose was investigated and compared for pure argon, 5% oxygen in argon, and pure hydrogen plasmas. Argon incorporation was noted only when the copper was oxidized in the mixed gas. Surfaces, stable in ambient atmosphere, were obtained having surface carbon values less than 10%. These optimized recipes will be used in processing copper vacuum chambers for the PEP-II B-Factory.

Hoyt, E.; Hoyt, M.; Kirby, R.; Perkins, C.; Wright, D.; Farvid, A.

1995-08-01T23:59:59.000Z

180

HYDROGEN OUTGASSING AND SURFACE PROPERTIES OF TIN COATED STAINLESS STEEL CHAMBERS.  

DOE Green Energy (OSTI)

The stainless steel vacuum chambers of the 248m accumulator ring of Spallation Neutron Source (SNS) are coated with {approx} 100 nm of titanium nitride (TiN) to reduce the secondary electron yield. The coating is produced by DC magnetron sputtering using a long cathode imbedded with permanent magnets. The outgassing rates of several SNS half-cell chambers were measured with and without TiN coating, and before and after in-situ bake. One potential benefit of a TiN coating is to serve as hydrogen permeation barrier that reduces the ultimate outgassing rate. By varying the coating parameters, films of different surface roughness were produced and analyzed by Auger electron spectroscopy, scanning electron microscopy and atomic force microscopy to illustrate the dependence of the outgassing on the film structure.

HE,P.; HSEUH,H.C.; MAPES,M.; TODD,R.; WEISS,D.; WILSON,D.

2002-11-11T23:59:59.000Z

Note: This page contains sample records for the topic "xmcd chamber 6t" 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

Model of High Current Breakdown from Cathode Field Emission in Aged Wire Chambers  

SciTech Connect

Observing single electron pulses provides insight into the mechanism that leads to sudden high current jumps (breakdown) in aged wire chambers. This single electron activity is found to be consistent with the Fowler-Nordheim equation for field emission of electrons from a cathode surface in a high electric field. The high electric field arises from the positive ion buildup on a very thin insulating layer on the cathode surface. A model is presented to explain the transient behavior of single electron pulses in response to abrupt changes in chamber ionization, as well as the steady state rate during a long term aging run. The model is based on properties of the insulating layer (dielectric constant, conductivity, and hole-mobility) as well as the Fowler-Nordheim equation.

Boyarski, A

2004-02-25T23:59:59.000Z

182

Apparatus for monitoring tritium in tritium-contaminating environments using a modified Kanne chamber  

DOE Patents (OSTI)

A conventional Kanne tritium monitor has been redesigned to reduce its sensitivity to such contaminants as tritiated water vapor and tritiated oil. The high voltage electrode has been replaced by a wire cylinder and the collector electrode has been reduced in diameter. The area sensitive to contamination has thereby been reduced by about a factor of forty while the overall apparatus sensitivity and operation has not been affected. The design allows for in situ decontamination of the chambers, if necessary.

Anderson, D.F.

1981-01-27T23:59:59.000Z

183

Challenges Surrounding the Injection and Arrival of Targets at LIFE Fusion Chamber Center  

SciTech Connect

IFE target designers must consider several engineering requirements in addition to the physics requirements for successful target implosion. These considerations include low target cost, high manufacturing throughput, the ability of the target to survive the injection into the fusion chamber and arrive in a condition and physical position consistent with proper laser-target interaction and ease of post-implosion debris removal. This article briefly describes these considerations for the Laser Inertial Fusion-based Energy (LIFE) targets currently being designed.

Miles, R; Spaeth, M; Manes, K; Amendt, P; Tabak, M; Bond, T; Kucheyev, S; Latkowski, J; Loosmore, G; Bliss, E; Baker, K; Bhandarkar, S; Petzoldt, R; Alexander, N; Tillack, M; Holdener, D

2010-12-01T23:59:59.000Z

184

PRE-SW Aging Chamber Report Tool (ACRT) Version 6.0, Beta  

Science Conference Proceedings (OSTI)

The 230kV Accelerated Aging Chamber is a multi-year test of more than 50 polymer and fiberglass components. Photographic inspections occur twice a year. Thousands of photographs accumulate making conventional reports difficult to read. This reporting tool enables the reader to jump from component to component and inspection to inspection. The reader can easily compare components at different levels of aging. This tool will make reviewing the important results of this ...

2013-08-11T23:59:59.000Z

185

Performance of Glass Resistive Plate Chambers for a high granularity semi-digital calorimeter  

E-Print Network (OSTI)

A new design of highly granular hadronic calorimeter using Glass Resistive Plate Chambers (GRPCs) with embedded electronics has been proposed for the future International Linear Collider (ILC) experiments. It features a 2-bit threshold semi-digital read-out. Several GRPC prototypes with their electronics have been successfully built and tested in pion beams. The design of these detectors is presented along with the test results on efficiency, pad multiplicity, stability and reproducibility.

Bedjidian, M; Boudry, V; Combaret, C; Decotigny, D; Gil, E Cortina; de la Taille, C; Dellanegra, R; Gapienko, V A; Grenier, G; Jauffret, C; Kieffer, R; Fouz, M -C; Han, R; Laktineh, I; Lumb, N; Manai, K; Mannai, S; Mathez, H; Mirabito, L; Pelayo, J Puerta; Ruan, M; Schirra, F; Seguin-Moreau, N; Tromeur, W; Tytgat, M; Donckt, M Vander; Zaganidis, N

2010-01-01T23:59:59.000Z

186

Apparatus for monitoring tritium in tritium contaminating environments using a modified Kanne chamber  

SciTech Connect

A conventional Kanne tritium monitor has been redesigned to reduce its sensitivity to such contaminants as tritiated water vapor and tritiated oil. The high voltage electrode has been replaced by a wire cylinder and the collector electrode has been reduced in diameter. The area sensitive to contamination has thereby been reduced by about a factor of forty while the overall apparatus sensitivity and operation has not been affected. The design allows for in situ decontamination of the chambers, if necessary.

Anderson, David F. (Los Alamos, NM)

1984-01-01T23:59:59.000Z

187

Fusion Engineering and Design 42 (1998) 537548 Chamber technology concepts for inertial fusion energy--three  

E-Print Network (OSTI)

to 650°C and has a low enough vapor pressure. Li and Li17Pb83 would also work but must be 1.5 m thick and increased pumping power features required by use of Li or Li17Pb83 suggest Flibe might be the lowest cost to a large variety of chamber design concepts for inertial fusion energy (IFE). Refs. [1­8] provide

Abdou, Mohamed

188

Interpretation of Secondary Organic Aerosol Formation from Diesel Exhaust Photooxidation in an Environmental Chamber  

Science Conference Proceedings (OSTI)

Secondary organic aerosol (SOA) formation from diesel exhaust in a smog chamber was investigated. Particle volume measurement based on mobility diameter is shown to underestimate SOA formation from diesel exhaust due to the external void space of agglomerate particles, in which case mass-based measurement technique is necessary. Rapid determination of particle effective density as a function of particle mass was performed by an Aerosol Particle Mass analyzer Scanning Mobility Particle Sizer (APM-SMPS) to obtain particle mass concentration and fractal dimension. Continuous aging of aerosol was observed in terms of atomic ratio (O/C), from 0.05 to 0.25 in 12 hours, underscoring the importance of multi-generational oxidation of low-volatile organic vapors emitted from diesel engine as the significant source of oxygenated SOA. Experimental conditions possibly have strong impacts on physical evolution of diesel particulates in a smog chamber. Higher particle effective densities were observed when raw exhaust was injected into a full bag as opposed to filling a bag with diluted exhaust using an ejector diluter. When longer transfer line was used for injecting diesel exhaust into the smog chamber, rapid particle coagulation was observed, leading to increasing particle volume concentration in dark while its mass concentration is decreasing.

Nakao, Shunsuke; Shrivastava, ManishKumar B.; Nguyen, Anh; Jung, Hee-Jung; Cocker, David R.

2011-04-14T23:59:59.000Z

189

Inertial confinement fusion reaction chamber and power conversion system study. Final report  

Science Conference Proceedings (OSTI)

This report summarizes the results of the second year of a two-year study on the design and evaluation of the Cascade concept as a commercial inertial confinement fusion (ICF) reactor. We developed a reactor design based on the Cascade reaction chamber concept that would be competitive in terms of both capital and operating costs, safe and environmentally acceptable in terms of hazard to the public, occupational exposure and radioactive waste production, and highly efficient. The Cascade reaction chamber is a double-cone-shaped rotating drum. The granulated solid blanket materials inside the rotating chamber are held against the walls by centrifugal force. The fusion energy is captured in a blanket of solid carbon, BeO, and LiAlO/sub 2/ granules. These granules are circulated to the primary side of a ceramic heat exchanger. Primary-side granule temperatures range from 1285 K at the LiAlO/sub 2/ granule heat exchanger outlet to 1600 K at the carbon granule heat exchanger inlet. The secondary side consists of a closed-cycle gas turbine power conversion system with helium working fluid, operating at 1300 K peak outlet temperature and achieving a thermal power conversion efficiency of 55%. The net plant efficiency is 49%. The reference design is a plant producing 1500 MW of D-T fusion power and delivering 815 MW of electrical power for sale to the utility grid. 88 refs., 44 figs., 47 tabs.

Maya, I.; Schultz, K.R.; Bourque, R.F.; Cheng, E.T.; Creedon, R.L.; Norman, J.H.; Price, R.J.; Porter, J.; Schuster, H.L.; Simnad, M.J.

1985-10-01T23:59:59.000Z

190

Detecting Ice Nuclei with a ContinuousFlow Diffusion Chamber-Some Exploratory Tests of Instrument Response  

Science Conference Proceedings (OSTI)

A few basic experiments were performed with artificial cloud condensation nuclei and ice-nucleating aerosols in a continuous-flow thermal gradient diffusion chamber to investigate the instrument's response. Brief pulses of ice nuclei were input ...

David C. Rogers

1994-08-01T23:59:59.000Z

191

Measurement of the propagation velocity of single plasma channels in a spark chamber for particle track detection  

SciTech Connect

The velocity of growth of single tracks in a spark chamber is described. It is shown thai in the pressure range 300 < p < 760 torr the tracks propagate with the same velocity to the anode and cathode provided that E/p remains below an experimentally determined value. A rise of this value causes an asymmetry, which makes the chamber no longer suited for the track localization of ionizing particles. (GE)

Timm, U.

1972-01-01T23:59:59.000Z

192

Filling the vacuum chamber of a technological system with homogeneous plasma using a stationary glow discharge  

Science Conference Proceedings (OSTI)

Experimental study of a glow discharge with electrostatic confinement of electrons is carried out in the vacuum chamber volume V {approx} 0.12 m{sup 3} of a technological system 'Bulat-6' in argon pressure range 0.005-5 Pa. The chamber is used as a hollow cathode of the discharge with the inner surface area S {approx} 1.5 m{sup 2}. It is equipped with two feedthroughs, which make it possible to immerse in the discharge plasma interchangeable anodes with surface area S{sub a} ranging from {approx}0.001 to {approx}0.1 m{sup 2}, as well as floating electrodes isolated from both the chamber and the anode. Dependences of the cathode fall U{sub c} = 0.4-3 kV on the pressure p at a constant discharge current in the range I = 0.2-2 A proved that aperture of the electron escape out of the electrostatic trap is equal to the sum S{sub o} = S{sub a} + S{sub f} of the anode surface S{sub a} and the floating electrode surface S{sub f}. The sum S{sub o} defines the lower limit p{sub o} of the pressure range, in which U{sub c} is independent of p. At p fall U{sub c} grows up dramatically, when the pressure decreases, and the pressure p tends to the limit p{sup ex}, which is in fact the discharge extinction pressure. At p {approx} p{sup ex} electrons emitted by the cathode and the first generation of fast electrons produced in the cathode sheath spend almost all their energy up to 3 keV on heating the anode and the floating electrode up to 600-800{sup o}C and higher. In this case the gas in the chamber is being ionized by the next generations of electrons produced in the cathode sheath, their energy being one order of magnitude lower. When S{sub a} fall of potential U{sub a} up to 0.5 kV.

Metel, A. S., E-mail: ametel@stankin.ru; Grigoriev, S. N.; Melnik, Yu. A.; Panin, V. V. [Moscow State University of Technology 'Stankin' (Russian Federation)

2009-12-15T23:59:59.000Z

193

Voltage Pulse Profile Characteristics with Space Charge of a Loaded Pulsed Ionization Chamber  

Science Conference Proceedings (OSTI)

An analytical model describing the voltage pulse profile of a pulsed ionization chamber and its relationship to the electron density in a field drift dominated plasma is formulated. The differential equation derived from the equations of motion and conservation of electron density combined with Poisson's equation for the electric space?charge field in the system is solved analytically for the cylindrical?electrode geometry with an external RC circuit. The numerical analysis for the given initial and boundary conditions yields the anode voltage?signal pulse profiles for the period of electron collection as a function of the initial electron density

S.H. Kim; W.H. Ellis

1972-01-01T23:59:59.000Z

194

Direct measurement of the impulse in a magnetic thrust chamber system for laser fusion rocket  

Science Conference Proceedings (OSTI)

An experiment is conducted to measure an impulse for demonstrating a magnetic thrust chamber system for laser fusion rocket. The impulse is produced by the interaction between plasma and magnetic field. In the experiment, the system consists of plasma and neodymium permanent magnets. The plasma is created by a single-beam laser aiming at a polystyrene spherical target. The impulse is 1.5 to 2.2 {mu}Ns by means of a pendulum thrust stand, when the laser energy is 0.7 J. Without magnetic field, the measured impulse is found to be zero. These results indicate that the system for generating impulse is working.

Maeno, Akihiro; Yamamoto, Naoji; Nakashima, Hideki [Interdisciplinary Graduate School of Engineering Science, Kyushu University, 6-1 Kasuga-kouen, Kasuga, Fukuoka 816-8580 (Japan); Fujioka, Shinsuke; Johzaki, Tomoyuki [Institute of Laser Engineering, Osaka University, Suita, Osaka 565-087 (Japan); Mori, Yoshitaka [Graduate School for the Creation of New Photonics Industries, Hamamatsu, Shizuoka 431-1202 (Japan); Sunahara, Atsushi [Institute for Laser Technology, Suita, Osaka 565-087 (Japan)

2011-08-15T23:59:59.000Z

195

Analysis of Combustion Chamber Deposits by ESI-TOF-MS and MALDI-TOF-MS  

DOE Green Energy (OSTI)

Combustion chamber deposits (CCDs) in internal combustion engines have been studied by various techniques to understand the relationship of performance degradation with deposit quantity and structure. XPS, XAS, NMR, and elemental analysis have offered insight into the bulk structure of C, H, N, O and metal components [1]. MS has offered some information about compound structure, but results are limited due to the insolubility and complexity of the materials. Recent advances in MS have opened new possibilities for analysis of CCDs. Here we report initial findings on the carbon structure of these deposits determined by ESI-TOF-MS and MADLI-TOF-MS.

Reynolds, J G; Shields, S J; Roos, J W

2001-06-14T23:59:59.000Z

196

Design and optimization of 6li neutron-capture pulse mode ion chamber  

E-Print Network (OSTI)

The purpose of this research is to design and optimize the performance of a unique, inexpensive 6Li neutron-capture pulse-mode ion chamber (LiPMIC) for neutron detection that overcomes the fill-gas contamination stemming from outgas of detector components. This research also provides a demonstration of performance of LiPMICs. Simulations performed with GARFIELD, a drift-chamber simulation package for ion transport in an electrostatic field, have shown that argon-methane mixtures of fill-gas allow maintenance of electron drift velocity through a surprisingly wide range of fill-gas content. During the design stage of LiPMIC development, the thicknesses of lithium metallization layer, the neutron energy conversion site of the detector, and the thickness of neutron moderator, the high-density polyethylene body, are optimized through analytical and MCNPX calculations. Also, a methodology of obtaining the suitable combination of electric field strength, electron drift velocity, and fill-gas mixtures has been tested and simulated using argon-methane gas mixtures. The LiPMIC is shown to have comparable efficiency to 3He proportional counters at a fraction of cost. Six-month long baseline measurements of overall detector performance shows there is a 3% reduction in total counts for 252Cf sources, which provides a good indicator for the longevity of the detector.

Chung, Kiwhan

2008-08-01T23:59:59.000Z

197

A new visible spectroscopy diagnostic for the JET ITER-like wall main chamber  

Science Conference Proceedings (OSTI)

In preparation for ITER, JET has been upgraded with a new ITER-like wall (ILW), whereby the main plasma facing components, previously of carbon, have been replaced by mainly Be in the main chamber and W in the divertor. As part of the many diagnostic enhancements, a new, survey, visible spectroscopy diagnostic has been installed for the characterization of the ILW. An array of eight lines-of-sight (LOS) view radially one of the two JET neutral beam shine through areas (W coated carbon fibre composite tiles) at the inner wall. In addition, one vertical LOS views the solid W tile at the outer divertor. The light emitted from the plasma is coupled to a series of compact overview spectrometers, with overall wavelength range of 380-960 nm and to one high resolution Echelle overview spectrometer covering the wavelength range 365-720 nm. The new survey diagnostic has been absolutely calibrated in situ by means of a radiometric light source placed inside the JET vessel in front of the whole optical path and operated by remote handling. The diagnostic is operated in every JET discharge, routinely monitoring photon fluxes from intrinsic and extrinsic impurities (e.g., Be, C, W, N, and Ne), molecules (e.g., BeD, D{sub 2}, ND) and main chamber and divertor recycling (typically D{alpha}, D{beta}, and D{gamma}). The paper presents a technical description of the diagnostic and first measurements during JET discharges.

Maggi, C. F. [Max-Planck-Institut fuer Plasmaphysik, EURATOM Association, D-85748 Garching (Germany); Brezinsek, S. [Forschungszentrum Juelich GmbH, EURATOM Association, D-52425 Juelich (Germany); Stamp, M. F.; Griph, S.; Heesterman, P.; Hogben, C.; Horton, A.; Meigs, A.; Studholme, W.; Zastrow, K.-D. [EURATOM/CCFE, Fusion Association, Culham Science Centre, Abingdon, OX14 3DB (United Kingdom); Morlock, C. [EFDA-CSU Garching, Boltzmannstrasse 2, 85748 Garching (Germany); Collaboration: JET-EFDA Contributors

2012-10-15T23:59:59.000Z

198

CMS reconstruction improvement for the muon tracking by the RPC chambers  

E-Print Network (OSTI)

The contribution of Resistive Plate Chamber (RPC) to muon reconstruction in CMS has been studied on a sample of muons collected in proton-proton collisions at sqrt(s) = 7 TeV at the LHC in 2011. Muon reconstruction is performed using the all-silicon inner tracker and with up to four stations of gas-ionization muon detectors. Drift Tubes and Cathode Strip Chambers detect muons in the barrel and endcap regions, respectively, and are complemented by the RPC system. Measured distributions of reconstructed hits in the RPCs crossed by muons from Z decays with a transverse momentum pT above 20 GeV/c are well reproduced by the Monte Carlo simulation. From the samples of J/psi and Z events, the efficiencies for muons with and without the inclusion of the RPC hits in the muon track reconstruction are measured and compared with the simulation. Using RPC information in track reconstruction improves up to about 3% of offline reconstruction efficiency for the muons in the region of pT above 7 GeV/c, in good agreement with simulation.

Min Suk Kim on behalf of the CMS Collaboration

2012-09-12T23:59:59.000Z

199

Investigation of Micro Porosity Sintered wick in Vapor Chamber for Fan Less Design  

E-Print Network (OSTI)

Micro Porosity Sintered wick is made from metal injection molding processes, which provides a wick density with micro scale. It can keep more than 53 % working fluid inside the wick structure, and presents good pumping ability on working fluid transmission by fine infiltrated effect. Capillary pumping ability is the important factor in heat pipe design, and those general applications on wick structure are manufactured with groove type or screen type. Gravity affects capillary of these two types more than a sintered wick structure does, and mass heat transfer through vaporized working fluid determines the thermal performance of a vapor chamber. First of all, high density of porous wick supports high transmission ability of working fluid. The wick porosity is sintered in micro scale, which limits the bubble size while working fluid vaporizing on vapor section. Maximum heat transfer capacity increases dramatically as thermal resistance of wick decreases. This study on permeability design of wick structure is 0.5 - 0.7, especially permeability (R) = 0.5 can have the best performance, and its heat conductivity is 20 times to a heat pipe with diameter (Phi) = 10mm. Test data of this vapor chamber shows thermal performance increases over 33 %.

C. S. Yu; W. C. Wei; S. W. Kang

2008-01-07T23:59:59.000Z

200

Extraction of depth-dependent perturbation factors for parallel-plate chambers in electron beams using a plastic scintillation detector  

SciTech Connect

Purpose: This work presents the experimental extraction of the overall perturbation factor P{sub Q} in megavoltage electron beams for NACP-02 and Roos parallel-plate ionization chambers using a plastic scintillation detector (PSD). Methods: The authors used a single scanning PSD mounted on a high-precision scanning tank to measure depth-dose curves in 6, 12, and 18 MeV clinical electron beams. The authors also measured depth-dose curves using the NACP-02 and PTW Roos chambers. Results: The authors found that the perturbation factors for the NACP-02 and Roos chambers increased substantially with depth, especially for low-energy electron beams. The experimental results were in good agreement with the results of Monte Carlo simulations reported by other investigators. The authors also found that using an effective point of measurement (EPOM) placed inside the air cavity reduced the variation of perturbation factors with depth and that the optimal EPOM appears to be energy dependent. Conclusions: A PSD can be used to experimentally extract perturbation factors for ionization chambers. The dosimetry protocol recommendations indicating that the point of measurement be placed on the inside face of the front window appear to be incorrect for parallel-plate chambers and result in errors in the R{sub 50} of approximately 0.4 mm at 6 MeV, 1.0 mm at 12 MeV, and 1.2 mm at 18 MeV.

Lacroix, Frederic; Guillot, Mathieu; McEwen, Malcolm; Cojocaru, Claudiu; Gingras, Luc; Beddar, A. Sam; Beaulieu, Luc [Departement de Radio-Oncologie, Centre hospitalier de l'Universite de Montreal (CHUM), 1560 Sherbrooke Est, Montreal, Quebec H2L 4M1 (Canada) and Departement de Physique, Universite de Montreal, Pavillon Roger-Gaudry (D-428), 2900 Boul. Edouard-Montpetit, Montreal, Quebec H3T 1J4 (Canada); Departement de Physique, de Genie Physique et d'Optique, Universite Laval, Quebec, Quebec G1K 7P4 (Canada) and Departement de Radio-Oncologie, Ho circumflex tel-Dieu de Quebec, Centre hospitalier Universitaire de Quebec (CHUQ), Quebec, Quebec G1R 2J6 (Canada); Ionizing Radiation Standards, Institute for National Measurement Standards, National Research Council (NRC), Ottawa, Ontario K1A 0R6 (Canada); Departement de Physique, de Genie Physique et d'Optique, Universite Laval, Quebec, Quebec G1K 7P4 (Canada) and Departement de Radio-Oncologie, Ho circumflex tel-Dieu de Quebec, Centre hospitalier Universitaire de Quebec (CHUQ), Quebec, Quebec G1R 2J6 (Canada); Department of Radiation Physics, Unit 94, University of Texas M. D. Anderson Cancer Center, 1515 Holcombe Boulevard, Houston, Texas 77030 (United States); Departement de Physique, de Genie Physique et d'Optique, Universite Laval, Quebec, Quebec G1K 7P4 (Canada) and Departement de Radio-Oncologie, Hotel-Dieu de Quebec, Centre hospitalier Universitaire de Quebec (CHUQ), Quebec, Quebec G1R 2J6 (Canada)

2010-08-15T23:59:59.000Z

Note: This page contains sample records for the topic "xmcd chamber 6t" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

U.S. Chamber of Commerce's 4th Annual North America Forum | Department of  

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

Commerce's 4th Annual North America Forum Commerce's 4th Annual North America Forum U.S. Chamber of Commerce's 4th Annual North America Forum June 16, 2008 - 1:30pm Addthis Remarks As Prepared for Delivery for Secretary Bodman Thank you very much, Ron, for that kind introduction and for the critically important work that you and your colleagues do at Lawrence Livermore. I also want to thank my good friend Secretary George Shultz - along with his esteemed co-chairs for this event, Peter Lougheed and Pedro Aspe, for inviting me to be with you. It's a pleasure to be here. The way I see it, this event could not come at a better time. With its focus on enhancing cooperation among the United States, Canada and Mexico - and on bringing together representatives of our governments and the private sector - you are helping to develop and achieve real and lasting solutions

202

Formation of metal nanoparticles by short-distance sputter deposition in a reactive ion etching chamber  

Science Conference Proceedings (OSTI)

A new method is reported to form metal nanoparticles by sputter deposition inside a reactive ion etching chamber with a very short target-substrate distance. The distribution and morphology of nanoparticles are found to be affected by the distance, the ion concentration, and the sputtering time. Densely distributed nanoparticles of various compositions were fabricated on the substrates that were kept at a distance of 130 mum or smaller from the target. When the distance was increased to 510 mum, island structures were formed, indicating the tendency to form continuous thin film with longer distance. The observed trend for nanoparticle formation is opposite to the previously reported mechanism for the formation of nanoparticles by sputtering. A new mechanism based on the seeding effect of the substrate is proposed to interpret the experimental results.

Nie Min; Meng, Dennis Desheng [Department of Mechanical Engineering and Engineering Mechanics, Michigan Technological University, Houghton, Michigan 49931 (United States); Sun Kai [Department of Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109 (United States)

2009-09-01T23:59:59.000Z

203

Length and Straightness of the Tubes for the BOS Prototype Chamber  

E-Print Network (OSTI)

We have measured length and straightness of 50 tubes of 3.8~m length, after cleaning, wiring and testing from a batch that was used in the construction of the BOS prototype chamber. The specifi ed length (aluminum tube only, without endplug) was 3800~mm with a tolerance of $\\pm$1~mm. We found a mean value of (3805$\\pm$2)~mm with a standard deviation of (0.3$\\pm$0.1)~mm. The measureme nts of the straightness of the 50 BOS MDT tubes gave a mean of the maximum deviation of 150~$\\mu$m for 10 measured points along the tubes at 0$^{\\circ}$, 90$^{\\circ}$, 180$^{\\circ}$ and 270$^{\\circ }$ around the tube diameter and a mean value of all deviations of 20~$\\mu$m with a measuring accuracy of 10~$\\mu$m.

Lagouri, T

1998-01-01T23:59:59.000Z

204

Chamber Surface Roughness and Electron Cloud for the Advanced Photon Source Superconducting Undulator  

E-Print Network (OSTI)

The electron cloud is a possible heat source in the superconducting undulator (SCU) designed for the Advanced Photon Source (APS), a 7-GeV electron synchrotron radiation source at Argonne National Laboratory. In electron cloud generation extensive research has been done, and is continuing, to understand the secondary electron component. However, little work has been done to understand the parameters of photoemission in the accelerator environment. To better understand the primary electron generation in the APS; a beamline at the Australian Light Source synchrotron was used to characterize two samples of the Al APS vacuum chamber. The total photoelectron yield and the photoemission spectra were measured. Four parameters were varied: surface roughness, sample temperature, incident photon energy, and incident photon angle, with their results presented here.

Boon, Laura

2013-01-01T23:59:59.000Z

205

Analysis of Combustion Chamber Deposits by ESI-TOF-MS and MALDI-TOF-MS  

DOE Green Energy (OSTI)

Combustion chamber deposits (CCD) in internal combustion engines have been studied by various techniques to understand the relationship of performance degradation with deposit quantity and structure. XPS, XAS, NMR, and elemental analysis have offered insight into the bulk structure of C, H, N, O and metal components. MS has offered some information about compound structure, but results are limited due to the insolubility and complexity of the materials. Recently, we have reported on the metal structure by XPS and XAS of several deposits from a GM 3800 engine generated using a standard fuel and one that contains low levels of the gasoline anti-knock additive, MMT. Here we report the initial findings on the carbon structure of these deposits determined by ESI-TOF-MS and MADLI-TOF-MS.

Reynolds, J G; Shields, S J; Roos, J W

2001-06-14T23:59:59.000Z

206

Measurement of electrical properties of electrode materials for the bakelite Resistive Plate Chambers  

E-Print Network (OSTI)

Single gap (gas gap 2 mm) bakelite Resistive Plate Chamber (RPC) modules of various sizes from 10 cm \\times 10 cm to 1 m \\times 1 m have been fabricated, characterized and optimized for efficiency and time resolution. Thin layers of different grades of silicone compound are applied to the inner electrode surfaces to make them smooth and also to reduce the surface resistivity. In the silicone coated RPCs an efficiency > 90% and time resolution \\sim 2 ns (FWHM) have been obtained for both the streamer and the avalanche mode of operation. Before fabrication of detectors the electrical properties such as bulk resistivity and surface resistivity of the electrode materials are measured carefully. Effectiveness of different silicone coating in modifying the surface resistivity was evaluated by an instrument developed for monitoring the I-V curve of a high resistive surface. The results indicate definite correlation of the detector efficiency for the atmospheric muons and the RPC noise rates with the surface resistiv...

Meghna, K K; Biswas, S; Bhattacharya, S; Bose, S; Chattopadhyay, S; Das, G; Marick, C; Saha, S; Viyogi, Y P

2012-01-01T23:59:59.000Z

207

SEY and Surface Analysis Measurements on FNAL Main Injector Ring S/S Beam Chamber Material  

DOE Green Energy (OSTI)

Material was provided by Dr. Weiren Chou, FNAL. Both mildly-activated used, and new sections of stainless steel (type 316L) beam chamber were measured. Centimeter-sized coupons were cleanly dry-cut from the large flat surface (called ''flat side'' in the plots) and from the ID end (inside diameter of the ring, in the case of the used material) and narrow end (in the case of the new material). The unused material was ultra-soniced in acetone (to remove storage residue), then rinsed with ethanol and blown dry with filtered N{sub 2}-gas, to simulate new chamber installation final rinse. Used material was installed, as cut. Surface chemistry was measured using x-ray photoelectron spectroscopy (sometimes called ''ESCA''). With this technique, soft x-rays (1486 eV) illuminate the sample, penetrating into the surface ten microns. Photoelectrons are generated from energy levels of the constituent compounds/elements present. Those electrons, within 5 nm or so of the surface, escape without energy loss and preserve valence information about the atomic levels from which they were generated. An electron energy analyzer, of good energy resolution, measures the photoelectron energy, thereby yielding both valence (chemical) information and relative atomic abundances in the top 5 nm of surface. Using appropriate sensitivity factors, these intensities are converted to a semi-quantitative (surface atom %) concentration in the analyzed layer. As a benchmark, the limit for carbon contamination on vacuum components for UHV use at SLAC is 50 at%. That corresponds to about 8-10 monolayers of elemental carbon. XPS does not detect hydrogen because it has no electrons after bonding. Generally, hydrides do not show evidence of ''chemical shift'' of the binding energy of the metal lines.

Kirby, Robert E.; /SLAC

2006-09-18T23:59:59.000Z

208

Usiing NovoCOS cleaning equipment in repairing the furnace-chamber lining in coke batteries 4 & 5 at OAO Koks  

SciTech Connect

Experience with a new surface-preparation technology for the ceramic resurfacing of the refractory furnace-chamber lining in coke batteries is described.

S.G. Protasov; R. Linden; A. Gross [OAO Koks, Kemerovo (Russian Federation)

2009-05-15T23:59:59.000Z

209

A Study of Homogeneous Condensation-Freezing Nucleation of Small Water Droplets in an Expansion Cloud Chamber  

Science Conference Proceedings (OSTI)

Observations of the homogeneous nucleation of water vapor in an expansion cloud chamber have been carried out for the temperature range ?50 to +17C in the carrier gases argon and helium. We have found that the onset of the ice phase in freshly ...

Rodney J. Anderson; Ronald C. Miller; James L. Kassner Jr.; Donald E. Hagen

1980-11-01T23:59:59.000Z

210

Large-eddy simulations of air flow and turbulence within and around low aspect ratio cylindrical open-top chambers  

Science Conference Proceedings (OSTI)

The flow around cylindrical open-top chambers (OTCs) with aspect ratios (i.e., height-to-diameter ratios) much less than unity is investigated using a large-eddy simulation (LES) model. The solid structures are represented using the immersed ...

Philip Cunningham; Rodman R. Linn; Eunmo Koo; Cathy J. Wilson

211

Tests of Micro-Pattern Gaseous Detectors for Active1 Target Time Projection Chambers in nuclear physics2  

E-Print Network (OSTI)

Tests of Micro-Pattern Gaseous Detectors for Active1 Target Time Projection Chambers in nuclear the gas used as the detection medium10 is also a target for nuclear reactions, have been used for a wide variety of11 nuclear physics applications since the eighties. Improvements in MPGD (Mi-12 cro Pattern

Recanati, Catherine

212

The Effect of Oxygen to Methane Ratio on the Methane-wet Air Autothermal Reforming and Carbon Deposition in the Micro-chamber  

Science Conference Proceedings (OSTI)

Considering the problems of catalyst carbon deposition and reforming endothermic reaction in micro-reforming chamber, coupled methane catalyst partial oxidation and steam methane reforming can make the micro-reforming system auto-supply heat and inhibit ... Keywords: micro-chamber, autothermal reforming, carbon deposition, oxygen to methane ratio

Ran Jingyu; Tu Weifeng

2011-01-01T23:59:59.000Z

213

Advanced radiation techniques for inspection of diesel engine combustion chamber materials components. Final report  

DOE Green Energy (OSTI)

Heavy duty truck engines must meet stringent life cycle cost and regulatory requirements. Meeting these requirements has resulted in convergence on 4-stroke 6-in-line, turbocharged, and after-cooled engines with direct-injection combustion systems. These engines provide much higher efficiencies (42%, fuel consumption 200 g/kW-hr) than automotive engines (31%, fuel consumption 270 g/kW-hr), but at higher initial cost. Significant near-term diesel engine improvements are necessary and are spurred by continuing competitive, Middle - East oil problems and Congressional legislation. As a result of these trends and pressures, Caterpillar has been actively pursuing a low-fuel consumption engine research program with emphasis on product quality through process control and product inspection. The goal of this project is to combine the nondestructive evaluation and computational resources and expertise available at LLNL with the diesel engine and manufacturing expertise of the Caterpillar Corporation to develop in-process monitoring and inspection techniques for diesel engine combustion chamber components and materials. Early development of these techniques will assure the optimization of the manufacturing process by design/inspection interface. The transition from the development stage to the manufacturing stage requires a both a thorough understanding of the processes and a way of verifying conformance to process standards. NDE is one of the essential tools in accomplishing both elements and in this project will be integrated with Caterpillar`s technological and manufacturing expertise to accomplish the project goals.

NONE

1995-10-09T23:59:59.000Z

214

Performance of a Drift Chamber Candidate for a Cosmic Muon Tomography System  

SciTech Connect

In the last decade, many groups around the world have been exploring different ways to probe transport containers which may contain illicit Special Nuclear Materials such as uranium. The muon tomography technique has been proposed as a cost effective system with an acceptable accuracy. A group of Canadian institutions (see above), funded by Defence Research and Development Canada, is testing different technologies to track the cosmic muons. One candidate is the single wire Drift Chamber. With the capability of a 2D impact position measurement, two detectors will be placed above and two below the object to be probed. In order to achieve a good 3D image quality of the cargo content, a good angular resolution is required. The simulation showed that 1mrad was required implying the spatial resolution of the trackers must be in the range of 1 to 2 mm for 1 m separation. A tracking system using three prototypes has been built and tested. The spatial resolution obtained is 1.7 mm perpendicular to the wire and 3 mm along the wire.

Anghel, V.; Jewett, C.; Jonkmans, G.; Thompson, M. [Atomic Energy of Canada Limited, Chalk River, Ontario (Canada); Armitage, J.; Botte, J.; Boudjemline, K.; Erlandson, A.; Oakham, G. [Ottawa-Carleton Institute for Physics, Department of Physics, Carleton University, Ottawa, Ontario (Canada); Bueno, J.; Bryman, D.; Liu, Z. [Advanced Applied Physics Solutions, Vancouver, British Columbia (Canada); Charles, E.; Gallant, G. [Canada Border Services Agency, Ottawa, Ontario (Canada); Cousins, T.; Noel, S. [International Safety Research, Ottawa, Ontario (Canada); Drouin, P.-L.; Waller, D. [Defence Research and Development Canada, Ottawa, Ontario (Canada); Stocki, T. J. [Health Canada, Ottawa, Ontario (Canada)

2011-12-13T23:59:59.000Z

215

Observations of Secondary Organic Aerosol Production and Soot Aging under Atmospheric Conditions Using a Novel Environmental Aerosol Chamber  

E-Print Network (OSTI)

Secondary organic aerosols (SOA) comprise a substantial fraction of the total global aerosol budget. While laboratory studies involving smog chambers have advanced our understanding of the formation mechanisms responsible for SOA, our knowledge of the processes leading to SOA production under ambient gaseous and particulate concentrations as well as the impact these aerosol types have on climate is poorly understood. Although the majority of atmospheric aerosols scatter radiation either directly or indirectly by serving as cloud condensation nuclei, soot is thought to have a significant warming effect through absorption. Like inorganic salts, soot may undergo atmospheric transformation through the vapor condensation of non-volatile gaseous species which will alter both its chemical and physical properties. Typical smog chamber studies investigating the formation and growth of SOA as well as the soot aging process are temporally limited by the initial gaseous concentrations injected into the chamber environment. Furthermore, data interpretation from such experiments is generally restricted to the singular gaseous species under investigation. This dissertation discusses the use of a new aerosol chamber designed to study the formation and growth of SOA and soot aging under atmospherically relevant conditions. The Ambient Aerosol Chamber for Evolution Studies (AACES) was deployed at three field sites where size and hygroscopic growth factor (HGF) of ammonium sulfate seed particles was monitored over time to examine the formation and growth of SOA. Similar studies investigating the soot aging process were also conducted in Houston, TX. It is shown that during the ambient growth of ammonium sulfate seed particles, as particle size increases, hygroscopic growth factors decrease considerably resulting in a significant organic mass fraction in the particle phase concluding an experiment. Observations of soot aging show an increase in measured size, HGF, mass and single scattering albedo. Ambient growth rate comparisons with chamber growth yielded similar trends verifying the use of AACES to study aerosol aging. Based on the results from this study, it is recommended that AACES be employed in future studies involving the production and growth of SOA and soot aging under ambient conditions in order to bridge the gaps in our current scientific knowledge.

Glen, Crystal

2010-12-01T23:59:59.000Z

216

Scintillation counter and wire chamber front end modules for high energy physics experiments  

SciTech Connect

This document describes two front-end modules developed for the proposed MIPP upgrade (P-960) experiment at Fermilab. The scintillation counter module was developed for the Plastic Ball detector time and charge measurements. The module has eight LEMO 00 input connectors terminated with 50 ohms and accepts negative photomultiplier signals in the range 0.25...1000 pC with the maximum input voltage of 4.0 V. Each input has a passive splitter with integration and differentiation times of {approx}20 ns. The integrated portion of the signal is digitized at 26.55 MHz by Analog Devices AD9229 12-bit pipelined 4-channel ADC. The differentiated signal is discriminated for time measurement and sent to one of the four TMC304 inputs. The 4-channel TMC304 chip allows high precision time measurement of rising and falling edges with {approx}100 ps resolution and has internal digital pipeline. The ADC data is also pipelined which allows deadtime-less operation with trigger decision times of {approx}4 {micro}s. The wire chamber module was developed for MIPP EMCal detector charge measurements. The 32-channel digitizer accepts differential analog signals from four 8-channel integrating wire amplifiers. The connection between wire amplifier and digitizer is provided via 26-wire twist-n-flat cable. The wire amplifier integrates input wire current and has sensitivity of 275 mV/pC and the noise level of {approx}0.013 pC. The digitizer uses the same 12-bit AD9229 ADC chip as the scintillator counter module. The wire amplifier has a built-in test pulser with a mask register to provide testing of the individual channels. Both modules are implemented as a 6Ux220 mm VME size board with 48-pin power connector. A custom europack (VME) 21-slot crate is developed for housing these front-end modules.

Baldin, Boris; DalMonte, Lou; /Fermilab

2011-01-01T23:59:59.000Z

217

Hydrocarbon-fuel/combustion-chamber-liner materials compatibility. Interim final report, 7 November 1986-31 October 1989  

SciTech Connect

Results of material compatibility experiments using hydrocarbon fuels in contact with copper-based combustion chamber liner materials are presented. Mil-Spec RP-1, n- dodecane, propane, and methane fuels were tested in contact with OFHC, NASA-Z, and ZrCu coppers. Two distinct test methods were employed. Static tests, in which copper coupons were exposed to fuel for long durations at constant temperature and pressure, provided compatibility data in a precisely controlled environment. Dynamic tests, using the Aerojet Carbothermal Test Facility, provided fuel and copper compatibility data under realistic booster engine service conditions. Tests were conducted using very pure grades of each fuel and fuels to which a contaminant, e.g., ethylene or methyl mercaptan, was added to define the role played by fuel impurities. Conclusions are reached as to degradation mechanisms and effects, methods for the elimination of these mechanisms, selection of copper alloy combustion chamber liners, and hydrocarbon fuel purchase specifications.

Gage, M.L.

1990-04-01T23:59:59.000Z

218

Forward Drift Chamber for the GlueX Experiment at the 12 GeV CEBAF Machine  

Science Conference Proceedings (OSTI)

The GlueX experiment will search for exotic mesons produced by 9 GeV linearly polarized photons from the upgraded CEBAF machine. It is critical to detect and measure the four-momenta of all the charged particles and photons resulting from the decays of the mesons. The solenoid-based detector system includes tracking detectors and calorimeters. The Forward Drift Chamber, FDC, consists of 24 circular planar drift chambers of 1m diameter. Additional cathode readout is required to achieve efficient pattern recognition. The detection of photons by the electromagnetic calorimeters imposes constraints on the amount of material used in the FDC. The specific features of the detector and the readout electronics will be described. Results from the tests of the full scale prototype will be presented, as well.

Pentchev, Lubomir; Zihlmann, Benedikt [Thomas Jefferson National Accelerator Facility, 12000 Jefferson Ave., Newport News, VA 23606 (United States)

2011-06-01T23:59:59.000Z

219

Forward Drift Chamber for the GlueX experiment at the 12 GeV CEBAF machine  

Science Conference Proceedings (OSTI)

The GlueX experiment will search for exotic mesons produced by 9 GeV linearly polarized photons from the upgraded CEBAF machine. It is critical to detect and measure the four-momenta of all the charged particles and photons resulting from the decays of the mesons. The solenoid-based detector system includes tracking detectors and calorimeters. The Forward Drift Chamber, FDC, consists of 24 circular planar drift chambers of 1m diameter. Additional cathode readout is required to achieve efficient pattern recognition. The detection of low energy photons by the electromagnetic calorimeters imposes constraints on the amount of material used in the FDC. The specific features of the detector and the readout electronics will be described. Results from the tests of the full scale prototype will be presented, as well.

Lubomir Pentchev, Benedikt Zihlmann

2011-06-01T23:59:59.000Z

220

A Measurement of the holographic minimum observable beam branching ratio in the Fermilab 15-foot bubble chamber  

SciTech Connect

Holography has been used successfully in combination with conventional optics for the first time in a large cryogenic bubble chamber, the 15-Foot Bubble Chamber at Fermilab, during a physics run. The innovative system combined the reference beam with the object beam, illuminating a conical volume of {approx} 1.4 m{sup 3}. Bubble tracks from neutrino interactions with a width of {approx} 120 {micro}m have been recorded with good contrast. The ratio of intensities of the object light to the reference light striking the film is called the Beam Branching Ratio. We obtained in our experiment an exceedingly small minimum-observable ratio of (0.54 {+-} 0.21) x 10{sup -7}. The technology has the potential for a wide range of applications.

Aderholz, M.; Aggarwal, M.M.; Akbari, H.; Allport, P.P.; Badyal, S.K.; Ballagh, H.C.; Barth, M.; Baton, J.P.; Bingham, H.H.; Bjelkhagen, H.; Brucker, E.B.; Burnstein, R.A.; Campbell, J.R.; Cence, R.J.; Chatterjee, T.K.; Clayton, E.F.; Corrigan, G.; Coutures, C.; DeProspo, D.; Devanand,; De Wolf, E.A.; /UC, Berkeley /Birmingham U. /Brussels U., IIHE /CERN /Punjab U. /Fermilab /Hawaii U. /Imperial Coll., London /IIT, Chicago /Jammu U. /Munich, Max Planck Inst. /Oxford U. /Rutgers U., Piscataway /Rutherford /DAPNIA, Saclay /Stevens Tech. /Tufts U.

1997-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "xmcd chamber 6t" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

EDDY CURRENT EFFECT OF THE BNL-AGS VACUUM CHAMBER ON THE OPTICS OF THE BNL-AGS SYNCHROTRON.  

Science Conference Proceedings (OSTI)

During the acceleration cycle of the AGS synchrotron, eddy currents are generated within the walls of the vacuum chambers of the AGS main magnets. The vacuum chambers have elliptical cross section, are made of inconel material with a wall thickness of 2 mm and are placed within the gap of the combined-function main magnets of the AGS synchrotron. The generation of the eddy currents in the walls of the vacuum chambers, creates various magnetic multipoles, which affect the optics of the AGS machine. In this report these magnetic multipoles are calculated for various time interval starting at the acceleration cycle, where the magnetic field of the main magnet is {approx}0.1 T, and ending before the beam extraction process, where the magnetic field of the main magnet is almost constant at {approx}1.1 T. The calculations show that the magnetic multipoles generated by the eddy-currents affect the optics of the AGS synchrotron during the acceleration cycle and in particular at low magnetic fields of the main magnet. Their effect is too weak to affect the optics of the AGS machine during beam extraction at the nominal energies.

TSOUPAS,N.; AHRENS,L.; BROWN,K.A.; GLENN,J.W.; GARDNER,K.

1999-03-29T23:59:59.000Z

222

Blood meal host preferences of Culex salinarius Coquillett (Diptera : culicidae) in Chambers County, Texas  

E-Print Network (OSTI)

Bloodmeal host preferences were assessed for Culex salinarius populations occurring along the upper Gulf Coast region of East Texas. Over a one-year period beginning in September 1991, blood-engorged female Cx. salinarius specimens were collected on a monthly basis from three field sites in Chambers County, TX. The source of blood contained in each specimen was determined using a modified precipitin test. The results were used to calculate seasonal foraging ratios for mosquito populations sampled at each site. No noticeable changes in bloodmeal host preferences occurred for Cx. salinarius populations sampled at the coastal marsh site during the study period. Mammals were the primary sources of bloodmeals for these populations, with most mosquitoes collected having fed on cattle. There was an increase in specimens testing positive for avian blood during winter (Dec.-Feb.) commensurate with the arrival of migratory goose populations in the vicinity. The overall foraging ratio, however, did not change. Culex salinarius populations sampled at the upper marsh site also demonstrated a preference for mammalian blood throughout the year. However, forage ratios indicated these populations varied in the mammals upon which they fed, with a number of specimens having fed on armadillos. Cx. salinarius populations sampled at the up-county site demonstrated greater tendency to select birds as bloodmeal sources. Mosquito specimens at this site tested positive for either passeriiform or ciconiiform birds, with a few specimens testing positive for rabbits and cattle. A preference was shown for ciconiiform birds during the spring (March-May). During the rest of the year, passeriiform birds served more as a source of bloodmeals for Cx. salinarius populations. Forage ratios indicated the use of passeriiform birds was not a function of preference, but rather a result of these birds being abundant at the up-county site. Results of this study substantiate earlier findings that Cx. salinarius females will use both mammals and birds as sources of bloodmeals. Females of this species are generalistic feeders and will utilize hosts that are in greatest abundance or which require the least amount of energy on the part of the mosquito to acquire.

Grieco, John Paul

1994-01-01T23:59:59.000Z

223

Toward an In Vitro Vasculature: Differentiation of Mesenchymal Stromal Cells Within an Endothelial Cell-Seeded Modular Construct in a Microfluidic Flow Chamber  

E-Print Network (OSTI)

An in vitro tissue construct amenable to perfusion was formed by randomly packing mesenchymal stromal cell (MSC)-embedded, endothelial cell (EC)-coated collagen cylinders (modules) into a microfluidic chamber. The interstices ...

Chamberlain, M. Dean

224

The Segregation of Aerosols by Cloud-Nucleating Activity. Part I: Design, Construction, and Testing of A High-Flux Thermal Diffusion Cloud Chamber for Mass Separation  

Science Conference Proceedings (OSTI)

We describe a thermal diffusion cloud chamber operated in series with an aerodynamic dichotomous separator that can segregate aerosol particles by their abilities to nucleate cloud droplets. The apparatus takes advantage of compensating gradients ...

Lee Harrison; Halstead Harrison

1985-04-01T23:59:59.000Z

225

Photon stimulated desorption (PSD) measurements of extruded copper and of welded copper beam chambers for the PEP II asymmetric B-factory  

DOE Green Energy (OSTI)

PEP II is being built as a higher luminosity electron-positron collider, with asymmetric beams of 9 GeV and 3.1 GeV, having maximum currents of 3.0 A. Based on the previous work on the NSLS VUV beamline U10B, a copper was selected for construction of UHV beam chambers and absorbers to minimize the pressure rise from synchrotron radiation during operation. An extruded beam chamber and a welded beam chamber were fabricated from the selected copper for PSD measurements on NSLS X-ray beamline X28A. The chambers were exposed to white light with a critical energy of 5 KeV, both direct and through a 0.010 inch thick Beryllium filter. Each chamber was exposed to a dose of approximately 10{sup 23} photons per meter at an incidence angle of 25 mrad, after argon glow conditioning and a 150 C vacuum bake. Desorption yields for H{sub 2} CO, CO{sub 2}, and CH{sub 4} are reported as a function of accumulated photon flux, critical energy, and chamber preparation. The results are compared with the previous work on beamline U10B and with those of other published work for copper.

Foerster, C.L.; Lanni, C. [Brookhaven National Lab., Upton, NY (United States). NSLS; Perkins, C. [Stanford Linear Accelerator Center, Menlo Park, CA (United States); Calderon, M.; Barletta, W. [Lawrence Livermore National Lab., CA (United States)

1994-12-31T23:59:59.000Z

226

Cl atom recombination on silicon oxy-chloride layers deposited on chamber walls in chlorine-oxygen plasmas  

SciTech Connect

Chlorine atom recombination coefficients were measured on silicon oxy-chloride surfaces deposited in a chlorine inductively coupled plasma (ICP) with varying oxygen concentrations, using the spinning wall technique. A small cylinder embedded in the walls of the plasma reactor chamber was rapidly rotated, repetitively exposing its surface to the plasma chamber and a differentially pumped analysis chamber housing a quadruple mass spectrometer for line-of-sight desorbing species detection, or an Auger electron spectrometer for in situ surface analysis. The spinning wall frequency was varied from 800 to 30 000 rpm resulting in a detection time, t (the time a point on the surface takes to rotate from plasma chamber to the position facing the mass or Auger spectrometer), of {approx}1-40 ms. Desorbing Cl{sub 2}, due to Langmuir-Hinshelwood (LH) Cl atom recombination on the reactor wall surfaces, was detected by the mass spectrometer and also by a pressure rise in one of the differentially pumped chambers. LH Cl recombination coefficients were calculated by extrapolating time-resolved desorption decay curves to t = 0. A silicon-covered electrode immersed in the plasma was either powered at 13 MHz, creating a dc bias of -119 V, or allowed to electrically float with no bias power. After long exposure to a Cl{sub 2} ICP without substrate bias, slow etching of the Si wafer coats the chamber and spinning wall surfaces with an Si-chloride layer with a relatively small amount of oxygen (due to a slow erosion of the quartz discharge tube) with a stoichiometry of Si:O:Cl = 1:0.38:0.38. On this low-oxygen-coverage surface, any Cl{sub 2} desorption after LH recombination of Cl was below the detection limit. Adding 5% O{sub 2} to the Cl{sub 2} feed gas stopped etching of the Si wafer (with no rf bias) and increased the oxygen content of the wall deposits, while decreasing the Cl content (Si:O:Cl = 1:1.09:0.08). Cl{sub 2} desorption was detectable for Cl recombination on the spinning wall surface coated with this layer, and a recombination probability of {gamma}{sub Cl} = 0.03 was obtained. After this surface was conditioned with a pure oxygen plasma for {approx}60 min, {gamma}{sub Cl} increased to 0.044 and the surface layer was slightly enriched in oxygen fraction (Si:O:Cl = 1:1.09:0.04). This behavior is attributed to a mechanism whereby Cl LH recombination occurs mainly on chlorinated oxygen sites on the silicon oxy-chloride surface, because of the weak Cl-O bond compared to the Cl-Si bond.

Khare, Rohit; Srivastava, Ashutosh; Donnelly, Vincent M. [Department of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas 77204 (United States)

2012-09-15T23:59:59.000Z

227

Turbulent particle deposition in a rectangular chamber: Study of the effect of particle size and ventilation regimes  

SciTech Connect

The interaction of aerosol particles with wall surfaces is important in modeling their behavior. This interaction is usually represented in theoretical models as a loss term. The loss rate is the rate at which particles deposit or react with the surfaces. This loss term is important in many branches of aerosol science including human health and indoor air quality. Increased surface deposition usually means lower concentrations of airborne particles and hence, lower exposure to the inhabitants. If the efficiency of the particle deposition is influenced by factors other than the particle size, such as a natural convection of the air, this has to be taken into account to evaluate the results. In this research, test aerosol sized from 15 nm to 3 {micro}m are produced by several different aerosol generators; the gas burner, the Collison nebulizer, the condensation aerosol generator, the orifice atomizer and the Vibrating Orifice Aerosol Generator (VOAG). A rectangular chamber whose dimensions are 75 x 75 x 180 cm{sup 3} was used in this study. The particles were injected into the chamber, with a known ventilation and the concentration decay was monitored by the Ultrafine Condensation Particle Counter (UCPC) and Optical Particle Counter (OPC). During the measurement, the air inside the chamber is moved by natural convection and ventilation effect. The results shows that the particle loss rate under the higher air exchange rate is larger and this is not only due to air exchange itself but also the wall deposition. The theoretical model presented by Benes and Holub (1996) agree with the experimental data better than the Crump and Seinfield (1981) model with the hypothesis of Plandtl`s mixing length. 118 refs.

Nomura, Yoshio

1996-04-01T23:59:59.000Z

228

Second coordinate readout in drift chambers by timing of the electromagnetic wave propagating along the anode wire  

Science Conference Proceedings (OSTI)

The feasibility of using an anode wire and surrounding electrodes in drift chambers as a transmission line for second coordinate readout has been studied. The method is based on propagation of the electromagnetic wave along the anode wire is determined by measurement, in an optimized electronic readout system, of the time difference between the arrivals of the signal to the ends of the wire. The resolution obtained on long wires (approx. 2 meters) is about 2 cm FWHM for minimum ionizing particles at a gas gain of approx. = 10/sup 5/.

Boie, R.A.; Radeka, V.; Rehak, P.; Xi, D.M.

1980-11-01T23:59:59.000Z

229

Test and evaluation of the Argonne BPAC10 Series air chamber calorimeter designed for 20 minute measurements  

SciTech Connect

This paper is the final report on DOE-OSS Task ANLE88002 Fast Air Chamber Calorimetry.'' The task objective was to design, construct, and test an isothermal air chamber calorimeter for plutonium assay of bulk samples that would meet the following requirements for sample power measurement: average sample measurement time less than 20 minutes. Measurement of samples with power output up to 10 W. Precision of better than 1% RSD for sample power greater than 1 W. Precision better than 0.010 watt SD, for sample power less than 1 W. This report gives a description of the calorimeter hardware and software and discusses the test results. The instrument operating procedure, included as an appendix, gives examples of typical input/output and explains the menu driven software. Sample measurement time of less than 20 minutes was attained by pre-equilibration of the samples in low cost precision preheaters and by prediction of equilibrium measurements. Tests at the TA55 Plutonium Facility at Los Alamos National Laboratory, on typical samples, indicates that the instrument meets all the measurement requirements.

Perry, R.B.; Fiarman, S.; Jung, E.A. (Argonne National Lab., IL (USA)); Cremers, T. (Los Alamos National Lab., NM (USA))

1990-10-01T23:59:59.000Z

230

Characterization and performances of a monitoring ionization chamber dedicated to IBA-universal irradiation head for Pencil Beam Scanning  

E-Print Network (OSTI)

Every radiotherapy center has to be equipped with real-time beam monitoring devices. In 2008, the medical application group from the Laboratory of Corpuscular Physics (LPC Caen) developed an Ionization Chamber in collaboration with the company IBA (Ion Beam Applications). This monitoring device called IC2/3 was developed to be used in IBAs universal irradiation head for Pencil Beam Scanning (PBS). The objectives presented in this article are to characterize the IC2/3 monitor in the energy and ux ranges used in protontherapy. The equipment has been tested with an IBAs cyclotronable to deliver proton beams from 70 to 230 MeV. This beam monitoring device has been validated and is now installed at the Westdeutsches Protonentherapiezentrum Essen protontherapy center (WPE, Germany). The results obtained in both terms of spatial resolution and dose measurements are at least equal to the initials speci cations needed for PBS purposes. The detector measures the dose with a relative precision better than 1% in the range 0.5 Gy/min to 8 Gy/min while the spatial resolution is higher than 250 m. The technology has been patented and ve IC2/3 chambers were delivered to IBA. Nowadays, IBA produces the IC2/3 beam monitoring device as part of its Proteus 235 product

C. Courtois; G. Boissonnat; C. Brusasco; J. Colin; D. Cussol; J. M. Fontbonne; B. Marchand; T. Mertens; S. De Neuter; J. Perronnel

2013-06-28T23:59:59.000Z

231

Integration of a broad beam ion source with a high-temperature x-ray diffraction vacuum chamber  

Science Conference Proceedings (OSTI)

Here, the integration of a low energy, linearly variable ion beam current density, mechanically in situ adjustable broad beam ion source with a high-temperature x-ray diffraction (XRD) vacuum chamber is reported. This allows in situ XRD investigation of phase formation and evolution processes induced by low energy ion implantation. Special care has been taken to an independent adjustment of the ion beam for geometrical directing towards the substrate, a 15 mm small ion source exit aperture to avoid a secondary sputter process of the chamber walls, linearly variable ion current density by using a pulse length modulation (PLM) for the accelerating voltages without changing the ion beam density profile, nearly homogeneous ion beam distribution over the x-ray footprint, together with easily replaceable Kapton{sup Registered-Sign} windows for x-rays entry and exit. By combining a position sensitive x-ray detector with this PLM-modulated ion beam, a fast and efficient time resolved investigation of low energy implantation processes is obtained in a compact experimental setup.

Manova, D.; Bergmann, A.; Maendl, S.; Neumann, H.; Rauschenbach, B. [Leibniz-Institut fuer Oberflaechenmodifizierung e. V., Permoserstr. 15, 04318 Leipzig (Germany)

2012-11-15T23:59:59.000Z

232

Improved blue response and efficiency of A-Si:H solar cells deposited from disilane using a dual-chamber plasma system  

DOE Green Energy (OSTI)

Thin film amorphous silicon solar cells with glass/SnO/sub 2//p/i/n/Al structures and 6 to 7% AM1 conversion efficiencies were fabricated at rapid deposition rates in a newly constructed dual-chamber glow discharge deposition system. The 500 nm thick intrinsic layer was deposited at the rate of 1.7 nm/s using disilane (Si/sub 2/H/sub 6/)-helium mixtures. This deposition rate is an order of magnitude greater than conventional high efficiency amorphous silicon solar cell depositions. Residual boron doping effects at the p/i interface can severely degrade cell performance particularly when the intrinsic layer is deposited in one chamber of the dual-chamber system and the intrinsic layer is deposited in the other chamber that is free of boron contaminants. Parameters such as electrode spacing, Si/sub 2/H/sub 6/ partial pressure and flow rate were optimized to produce uniform deposition over large areas. At the substrate temperature T/sub s/ selected for solar cell intrinsic layer deposition, the spin density was measured to be a minimum at 5 x 10/sup 15//cm/sup 3/. For a given T/sub s/, an intrinsic layer deposited from Si/sub 2/H/sub 6/ absorbs fewer photons and can generate less current under solar simulation than a similar film produced from monosilane. Identical solar cells were deposited in either the single-chamber mode or the dual-chamber mode for comparison. Single-chamber mode cells perform poorly over the visible wavelengths and hence produce low short circuit currents. The dual-chamber mode cells show a significant improvement in blue response and a factor of two increase in short circuit current over the single-chamber mode cells. Under short circuit conditions, 15 mA/cm/sup 2/ was generated from rapidly deposited (1.7 nm/s) cells from disilane and 18 mA/cm/sup 2/ from low deposition rate (0.18 nm/s) monosilane cells. These values are comparable to or better than those reported for similar cells by other groups.

Rajeswaran, G.; Vanier, P.E.; Corderman, R.R.; Kampas, F.J.

1985-01-01T23:59:59.000Z

233

ENVIRONMENTAL CHAMBER STUDIES OF OZONE IMPACTS OF COATINGS VOCs Final Report to the California Air Resources Board Contract No. 07-339 By  

E-Print Network (OSTI)

An environmental chamber and modeling study was conducted to reduce uncertainties in atmospheric ozone impacts for volatile organic compounds (VOCs) emitted from coatings. Some coatings VOCs (Texanol and low-aromatic petroleum distillates) have near-zero or negative incremental ozone reactivities in chamber experiments, but calculations show positive ozone impacts in the atmosphere. Modeling indicated that experiments with increased light intensity and added H2O2 should give reactivities that better correlate with those in the atmosphere. After upgrading our chambers light source, experiments to test the new method performed as expected, and gave good correlations between experimental and atmospheric MIR values for the VOCs tested. These experiments also appear to be more sensitive to effects of VOCs on secondary organic aerosol (SOA) formation than previous experiments. Such experiments should be included in future environmental chamber reactivity studies, though other types of experiments are also needed for adequate mechanism evaluation. Experiments were also conducted to assess ozone impacts of ethyl methyl ketone oxime (EMKO), and soy ester solvents. The EMKO results indicated it has both radical sinks and NOx sources in its mechanism, and has no measurable impact on SOA formation. The EMKO mechanism that simulated the data gave a negative MIR of-1.27 gm O3 /gm VOC, but positive MOIR and EBIR values of

William P. L. Carter

2011-01-01T23:59:59.000Z

234

Complete genome sequence of Halopiger xanaduensis type strain (SH6T)  

SciTech Connect

Halopiger xanaduensis is the type species of the genus Halopiger and belongs to the euryarchaeal family Halobacteriaceae. H. xanaduensis strain SH-6, which is designated as the type strain, was isolated from the sediment of a salt lake in Inner Mongolia, Lake Shangmatala. Like other members of the family Halobacteriaceae, it is an extreme halophile requiring at least 2.5 M salt for growth. We report here the sequencing and annotation of the 4,355,268 bp genome, which includes one chromosome and three plasmids. This genome is part of a Joint Genome Institute (JGI) Community Sequencing Program (CSP) project to sequence diverse haloarchaeal genomes.

Anderson, Iain [U.S. Department of Energy, Joint Genome Institute; Tindall, Brian [DSMZ - German Collection of Microorganisms and Cell Cultures GmbH, Braunschweig, Germany; Rohde, Manfred [HZI - Helmholtz Centre for Infection Research, Braunschweig, Germany; Lucas, Susan [U.S. Department of Energy, Joint Genome Institute; Han, James [U.S. Department of Energy, Joint Genome Institute; Lapidus, Alla L. [U.S. Department of Energy, Joint Genome Institute; Cheng, Jan-Fang [U.S. Department of Energy, Joint Genome Institute; Goodwin, Lynne A. [Los Alamos National Laboratory (LANL); Pitluck, Sam [U.S. Department of Energy, Joint Genome Institute; Peters, Lin [U.S. Department of Energy, Joint Genome Institute; Pati, Amrita [U.S. Department of Energy, Joint Genome Institute; Mikhailova, Natalia [U.S. Department of Energy, Joint Genome Institute; Pagani, Ioanna [U.S. Department of Energy, Joint Genome Institute; Teshima, Hazuki [Los Alamos National Laboratory (LANL); Han, Cliff [Los Alamos National Laboratory (LANL); Tapia, Roxanne [Los Alamos National Laboratory (LANL); Land, Miriam L [ORNL; Woyke, Tanja [U.S. Department of Energy, Joint Genome Institute; Klenk, Hans-Peter [DSMZ - German Collection of Microorganisms and Cell Cultures GmbH, Braunschweig, Germany; Kyrpides, Nikos C [U.S. Department of Energy, Joint Genome Institute; Ivanova, N [U.S. Department of Energy, Joint Genome Institute

2012-01-01T23:59:59.000Z

235

S T A T E OF CONNECTICUT E X E C U T I V E CHAMBERS M  

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

T T A T E OF CONNECTICUT E X E C U T I V E CHAMBERS M . JODI R E L L GOVERNOR The Honorable Steven Chu, Secretary United States Department of Energy 1000 Independence Avenue, S. W. Washington, D.C. 20585 March 23,2009 Dear Secretary Chu: Re: State Energy Program Assurances In accordance with Section 41 0 of the American Recovery and Reinvestment Act of 2009,I hereby notify you that I have obtained necessary assurances that each of the following will occur: (1) The applicable State regulatory authority will seek to implement, in appropriate proceedings for each electric and gas utility, with respect to which the State regulatory authority has ratemaking authority, a general policy that ensures that utility financial incentives are aligned with helping their customers use energy more efficiently and that provide timely cost recovery

236

Hybrid bubble chamber studies of K+ p and K- p interactions at 75-GeV/c  

DOE Green Energy (OSTI)

We propose to expose the FNAL 30' liquid hydrogen bubble chamber to K{sup +} and K{sup -} beams both at 75 GeV/c. Each exposure consists of 100,000 equivalent K pictures. We plan to use the upstream tagging system currently in place and a downstream spectrometer with acceptance considerably increased over that of the current PHC system. This new downstream system will also be equipped with a lead glass photon detector with good spatial and energy resolution. We will study comparison of K{sup +} and K{sup -} results, as well as results from {pi}{sup +}, {pi}{sup -} , and {bar p} beams at this energy which are the subject of separate proposals.

Bugg, W.M.; Condo, G.T.; Hart, E.L.; Handler, T.; /Tennessee U.; Cohn, H.O.; McCulloch, R.D.; /Oak Ridge; Bachman, L.; Chien, C.Y.; Lucas, P.; Pevsner, A.; /Johns Hopkins; Jones, M.D.; /Rutgers U., Piscataway /Stevens Inst.

1975-01-01T23:59:59.000Z

237

A study of the link between cosmic rays and clouds with a cloud chamber at the CERN PS  

E-Print Network (OSTI)

Recent satellite data have revealed a surprising correlation between galactic cosmic ray (GCR) intensity and the fraction of the Earth covered by clouds. If this correlation were to be established by a causal mechanism, it could provide a crucial step in understanding the long-sought mechanism connecting solar and climate variability. The Earth's climate seems to be remarkably sensitive to solar activity, but variations of the Sun's electromagnetic radiation appear to be too small to account for the observed climate variability. However, since the GCR intensity is strongly modulated by the solar wind, a GCR-cloud link may provide a sufficient amplifying mechanism. Moreover if this connection were to be confirmed, it could have profound consequences for our understanding of the solar contributions to the current global warming. The CLOUD (Cosmics Leaving OUtdoor Droplets) project proposes to test experimentally the existence a link between cosmic rays and cloud formation, and to understand the microphysical mechanism. CLOUD plans to perform detailed laboratory measurements in a particle beam at CERN, where all the parameters can be precisely controlled and measured. The beam will pass through an expansion cloud chamber and a reactor chamber where the atmosphere is to be duplicated by moist air charged with selected aerosols and trace condensable vapours. An array of external detectors and mass spectrometers is used to analyse the physical and chemical characteristics of the aerosols and trace gases during beam exposure. Where beam effects are found, the experiment will seek to evaluate their significance in the atmosphere by incorporating them into aerosol and cloud models.

The Cloud Collaboration

2001-04-16T23:59:59.000Z

238

Intercomparison of active, passive and continuous instruments for radon and radon progeny measurements in the EML chamber and test facility  

SciTech Connect

Results are presented from the Fifth Intercomparison of Active, Passive and Continuous Instruments for Radon and Radon Progeny Measurements conducted in the EML radon exposure and test facility in May 1996. In total, thirty-four government, private and academic facilities participated in the exercise with over 170 passive and electronic devices exposed in the EML test chamber. During the first week of the exercise, passive and continuous measuring devices were exposed (usually in quadruplicate) to about 1,280 Bq m{sup {minus}3} {sup 222}Rn for 1--7 days. Radon progeny measurements were made during the second week of the exercise. The results indicate that all of the tested devices that measure radon gas performed well and fulfill their intended purpose. The grand mean (GM) ratio of the participants` reported values to the EML values, for all four radon device categories, was 0.99 {plus_minus} 0.08. Eighty-five percent of all the radon measuring devices that were exposed in the EML radon test chamber were within {plus_minus}1 standard deviation (SD) of the EML reference values. For the most part, radon progeny measurements were also quite good as compared to the EML values. The GM ratio for the 10 continuous PAEC instruments was 0.90 {plus_minus} 0.12 with 75% of the devices within 1 SD of the EML reference values. Most of the continuous and integrating electronic instruments used for measuring the PAEC underestimated the EML values by about 10--15% probably because the concentration of particles onto which the radon progeny were attached was low (1,200--3,800 particles cm{sup {minus}3}). The equilibrium factor at that particle concentration level was 0.10--0.22.

Scarpitta, S.C.; Tu, K.W.; Fisenne, I.M.; Cavallo, A.; Perry, P.

1996-10-01T23:59:59.000Z

239

Large-Eddy Simulations of Air Flow and Turbulence within and around Low-Aspect-Ratio Cylindrical Open-Top Chambers  

Science Conference Proceedings (OSTI)

The flow around cylindrical open-top chambers (OTCs) with aspect ratios (i.e., height-to-diameter ratios) much less than unity is investigated using a large-eddy simulation (LES) model. The solid structures are represented using the immersed ...

Philip Cunningham; Rodman R. Linn; Eunmo Koo; Cathy J. Wilson

2013-08-01T23:59:59.000Z

240

Ion-driver fast ignition: Reducing heavy-ion fusion driver energy and cost, simplifying chamber design, target fab, tritium fueling and power conversion  

E-Print Network (OSTI)

also be correspondingly higher than at 3.5 m: RRc 9 := 6 ?Fc 9 (Hz) RRc 9 = 14.6 (Hz) , this chamber pulse M := 1.18multiplier Pth 9 := Y 2d ? M ? RRc 9 Pth 9 = 740 (MWth).

1998-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "xmcd chamber 6t" 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

Accuracy of EGSnrc calculations at {sup 60}Co energies for the response of ion chambers configured with various wall materials and cavity dimensions  

SciTech Connect

In this investigation, five experimental data sets are used to evaluate the ability of the EGSnrc Monte Carlo code to calculate the change in chamber response associated with changes in wall material and cavity dimension at {sup 60}Co energies. Calculations of the ratios of response per unit mass of air as a function of cavity volume for walls ranging from polystyrene to lead are generally within 1%-3% of experiments. A few exceptions, which are discussed, include 20%-30% discrepancies with experiments involving lead-walled chambers used by Attix et al. [J. Res. Natl. Bur. Stand. 60, 235-243 (1958)] and Cormack and Johns [Radiat. Res. 1, 133-157 (1954)], and 5% discrepancies for the graphite chamber of Attix et al. (relative to data for other wall materials). Simulations of the experiment by Whyte [Radiat. Res. 6, 371-379 (1957)], which varied cavity air pressure in a large cylindrical chamber, are generally within 0.5% (wall/electrode materials ranging from beryllium to copper). In all cases, the agreement between measurements and EGSnrc calculations is much better when the response as a function of cavity height or air pressure is considered for each wall material individually. High-precision measurements [Burns et al., Phys. Med. Biol. 52, 7125-7135 (2007)] of the response per unit mass as a function of cavity height for a graphite chamber are also accurately reproduced, and validate previous tests of the transport mechanics of EGSnrc. Based on the general agreement found in this work between corresponding experimental results and EGSnrc calculations it can be concluded that EGSnrc can reliably be used to calculate changes in response with changes in various wall materials and cavity dimensions at {sup 60}Co energies within a accuracy of a few percent or less.

La Russa, Daniel J.; Rogers, D. W. O. [Carleton Laboratory for Radiotherapy Physics, Ottawa Carleton Institute of Physics, Carleton University Campus, Ottawa, Ontario K1S 5B6 (Canada)

2008-12-15T23:59:59.000Z

242

www.mdpi.com/journal/ijms A Single-Chamber Microbial Fuel Cell without an Air Cathode  

E-Print Network (OSTI)

treatment with electricity production. Electricity generation with simultaneous nitrate reduction in a single-chamber MFC without air cathode was studied, using glucose (1 mM) as the carbon source and nitrate (1 mM) as the final electron acceptor employed by Bacillus subtilis under anaerobic conditions. Increasing current as a function of decreased nitrate concentration and an increase in biomass were observed with a maximum current of 0.4 mA obtained at an external resistance (Rext) of 1 K? without a platinum catalyst of air cathode. A decreased current with complete nitrate reduction, with further recovery of the current immediately after nitrate addition, indicated the dependence of B. subtilis on nitrate as an electron acceptor to efficiently produce electricity. A power density of 0.0019 mW/cm 2 was achieved at an Rext of 220 ?. Cyclic voltammograms (CV) showed direct electron transfer with the involvement of mediators in the MFC. The low coulombic efficiency (CE)

Vanita Roshan Nimje; Chien-cheng Chen; Hau-ren Chen; Chien-yen Chen; Min-jen Tseng; Kai-chien Cheng; Ruey-chyuan Shih; Young-fo Chang

2012-01-01T23:59:59.000Z

243

Neutrino--deuterium reactions in the 7-foot bubble chamber. [Strangeness, CVC theory, V-A theory  

DOE Green Energy (OSTI)

Recent results are reported from the analysis of 569,000 ..nu.. pictures taken in the BNL 7-ft bubble chamber filled with D/sub 2/ (and an additional 204,000 pictures in H/sub 2/). The statistics of current analysis include 648 quasielastic ..nu../sub ..mu../ d ..-->.. ..mu../sup -/pp/sub s/ events and 25 events with visible strangeness present. Using the quasielastic events in the framework of the conventional V-A theory, the values M/sub V/ = 0.87 +- 0.09 GeV and M/sub A/ = 1.03 +- 0.19 GeV are found. The value is in good agreement with the CVC prediction of M/sub V/ = 0.84 GeV. With the fixed value of M/sub V/ = 0.84 GeV, a one-parameter fit yields M/sub A/ = 1.08 +- 0.08 GeV. Also 8 events are found in the exclusive channel ..nu..n ..-->.. ..mu../sup -/K/sup +/..lambda.. in agreement with a theoretical calculation using the generalized Born approximation. 30 references.

Cnops, A M; Connolly, P L; Kahn, S A; Kirk, H G; Murtagh, M J; Palmer, R B; Samios, N P; Tanaka, M

1978-01-01T23:59:59.000Z

244

First determination of an astrophysical cross section with a bubble chamber: the 15N(?,?)19F reaction  

E-Print Network (OSTI)

We have devised a technique for measuring some of the most important nuclear reactions in stars which we expect to provide considerable improvement over previous experiments. Adapting ideas from dark matter search experiments with bubble chambers, we have found that a superheated liquid is sensitive to recoils produced from \\gamma-rays photodisintegrating the nuclei of the liquid. The main advantage of the new target-detector system is a gain in yield of six orders of magnitude over conventional gas targets due to the higher mass density of liquids. Also, the detector is practically insensitive to the \\gamma-ray beam itself, thus allowing it to detect only the products of the nuclear reaction of interest. The first set of tests of a superheated target with a narrow bandwidth \\gamma-ray beam was completed and the results demonstrate the feasibility of the scheme. The new data are successfully described by an R-matrix model using published resonance parameters. With the increase in luminosity of the next generation \\gamma-ray beam facilities, the measurement of thermonuclear rates in the stellar Gamow window would become possible.

C. Ugalde; B. DiGiovine; D. Henderson; R. J. Holt; K. E. Rehm; A. Sonnenschein; A. Robinson; R. Raut; G. Rusev; A. P. Tonchev

2012-12-31T23:59:59.000Z

245

Characterization and performances of a monitoring ionization chamber dedicated to IBA-universal irradiation head for Pencil Beam Scanning  

E-Print Network (OSTI)

Every radiotherapy center has to be equipped with real-time beam monitoring devices. In 2008, the medical application group from the Laboratory of Corpuscular Physics (LPC Caen) developed an Ionization Chamber in collaboration with the company IBA (Ion Beam Applications). This monitoring device called IC2/3 was developed to be used in IBAs universal irradiation head for Pencil Beam Scanning (PBS). The objectives presented in this article are to characterize the IC2/3 monitor in the energy and ux ranges used in protontherapy. The equipment has been tested with an IBAs cyclotronable to deliver proton beams from 70 to 230 MeV. This beam monitoring device has been validated and is now installed at the Westdeutsches Protonentherapiezentrum Essen protontherapy center (WPE, Germany). The results obtained in both terms of spatial resolution and dose measurements are at least equal to the initials speci cations needed for PBS purposes. The detector measures the dose with a relative precision better than 1% in the rang...

Courtois, C; Brusasco, C; Colin, J; Cussol, D; Fontbonne, J M; Marchand, B; Mertens, T; De Neuter, S; Peronnel, J

2013-01-01T23:59:59.000Z

246

First Dark Matter Search Results from a 4-kg CF$_3$I Bubble Chamber Operated in a Deep Underground Site  

SciTech Connect

New data are reported from the operation of a 4.0 kg CF{sub 3}I bubble chamber in the 6800 foot deep SNOLAB underground laboratory. The effectiveness of ultrasound analysis in discriminating alpha decay background events from single nuclear recoils has been confirmed, with a lower bound of >99.3% rejection of alpha decay events. Twenty single nuclear recoil event candidates and three multiple bubble events were observed during a total exposure of 553 kg-days distributed over three different bubble nucleation thresholds. The effective exposure for single bubble recoil-like events was 437.4 kg-days. A neutron background internal to the apparatus, of known origin, is estimated to account for five single nuclear recoil events and is consistent with the observed rate of multiple bubble events. This observation provides world best direct detection constraints on WIMP-proton spin-dependent scattering for WIMP masses >20 GeV/c{sup 2} and demonstrates significant sensitivity for spin-independent interactions.

Behnke, E.; /Indiana U., South Bend; Behnke, J.; /Indiana U., South Bend; Brice, S.J.; /Fermilab; Broemmelsiek, D.; /Fermilab; Collar, J.I.; /Chicago U., EFI; Conner, A.; /Indiana U., South Bend; Cooper, P.S.; /Fermilab; Crisler, M.; /Fermilab; Dahl, C.E.; /Chicago U., EFI; Fustin, D.; /Chicago U., EFI; Grace, E.; /Indiana U., South Bend /Fermilab

2012-04-01T23:59:59.000Z

247

Optical Readout Time Projection Chamber (O-TPC) for a Study of Oxygen Formation In Stellar Helium Burning  

E-Print Network (OSTI)

We are developing an Optical Readout Time Projection Chamber (O-TPC) detector for the study of the 12C(a,g)16O reaction that determines the ratio of carbon to oxygen in helium burning. This ratio is crucial for understanding the final fate of a progenitor star and the nucleosynthesis of elements prior to a Type II supernova; an oxygen rich star is predicted to collapse to a black hole, and a carbon rich star to a neutron star. Type Ia supernovae (SNeIa) are used as standard candles for measuring cosmological distances with the use of an empirical light curve-luminosity stretching factor. It is essential to understand helium burning that yields the carbon/oxygen white dwarf and thus the initial stage of SNeIa. The O-TPC is intended for use with high intensity photon beams extracted from the HIgS/TUNL facility at Duke University to study the 16O(g,a)12C reaction, and thus the direct reaction at energies as low as 0.7 MeV. We are conducting a systematical study of the best oxygen containing gas with light emitting admixture(s) for use in such an O-TPC. Preliminary results with CO_2 + TEA mixture were obtained

Moshe Gai; Amos Breskin; Rachel Chechik; Volker Dangendorf; Henry R. Weller

2005-04-01T23:59:59.000Z

248

Cerebral imaging using $sup 68$Ga DTPA and the U.C.S.F. multiwire proportional chamber positron camera  

SciTech Connect

A multiwire proportional chamber positron camera consisting of four 48 x 48 cm$sup 2$ detectors linked to a small digital computer has been designed, constructed, and characterized. Initial clinical application to brain imaging using $sup 68$Ga DTPA in 10 patients with brain tumors is described. Tomographic image reconstruction is accomplished by an algorithm determining the intersection of the annihilation photon paths in planes of interest. Final image processing utilizes uniformity correction, simple thresholding, and smoothing. The positron brain images were compared to conventional scintillation brain scans and x-ray computerized axial tomograms (CAT) in each case. The positron studies have shown significant mitigation of confusing superficial activity resulting from craniotomy in comparison to conventional brain scans. Central necrosis of lesions observed in the positron images, but not in the conventional scans, has been confirmed in CAT. Modifications of the camera are being implemented to improve image quality, and these changes combined with the tomography inherent in the positron scans are anticipated to result in images superior in information content to conventional brain scans. (auth)

Hattner, R.S.; Lim, C.B.; Swann, S.J.; Kaufman, L.; Perez-Mendez, V.; Chu, D.; Huberty, J.P.; Price, D.C.; Wilson, C.B.

1975-12-01T23:59:59.000Z

249

Avian inhalation exposure chamber  

DOE Patents (OSTI)

An exposure system is designed for delivering gaseous material ranging in particle size from 0.4 micrometers to 20.0 micrometers uniformly to the heads of experimental animals, primarily birds. The system includes a vertical outer cylinder and a central chimney with animal holding bottles connected to exposure ports on the vertical outer cylinder. 2 figs.

Briant, J.K.; Driver, C.J.

1992-05-05T23:59:59.000Z

250

Avian inhalation exposure chamber  

DOE Patents (OSTI)

An exposure system for delivering gaseous material ranging in particle size from 0.4 micrometers to 20.0 micrometers uniformly to the heads of experimental animals, primarily birds. The system includes a vertical outer cylinder and a central chimney with animal holding bottles connected to exposure ports on the vertical outer cylinder.

Briant, James K. (P.O. Box 999, Richland, WA 99352); Driver, Crystal J. (P.O. Box 999, Richland, WA 99352)

1992-01-01T23:59:59.000Z

251

NIOSH tests refuge chambers  

Science Conference Proceedings (OSTI)

A NIOSH report questions the viability of the shelters already certified by West Virginia. 1 tab., 6 photos.

Fiscor, S.

2008-04-15T23:59:59.000Z

252

LOW ENERGY COUNTING CHAMBERS  

DOE Patents (OSTI)

A beta particle counter adapted to use an end window made of polyethylene terephthalate was designed. The extreme thinness of the film results in a correspondingly high transmission of incident low-energy beta particles by the window. As a consequence, the counting efficiency of the present counter is over 40% greater than counters using conventional mica end windows.

Hayes, P.M.

1960-02-16T23:59:59.000Z

253

Numerical Simulation Of Gas-Droplet Flow Around A Nozzle In A Cylindrical Chamber Using A Lagrangian Model Based On A Multigrid Navier-Stokes Solver  

E-Print Network (OSTI)

A numerical simulation of an upward directed, 2-- dimensional, turbulent gas--droplet flow around an axisymmetric nozzle in a cylindrical chamber was made. We use a Lagrangian method, where trajectories of many droplets are calculated from the equations of motion along with the continuity and momentum equations of fluid. Strong coupling effects between the two phases are dealt with. Special algorithms were introduced for particle tracking and interpolation of the fluid flow data at the particle location on the numerical grid, which use multigrid structure for improvement of the speed of droplet trajectory calculation. The Lagrangian solver for the calculation of the trajectory and particle momentum source term was parallelised on a workstation cluster using a host--node programming model. The resulting droplet and fluid velocities at different cross sections of the cylindrical chamber are reported and compared with measurements. 2. INTRODUCTION In many engineering flow situations par...

Thomas Frank; Ingvelde Schulze

1994-01-01T23:59:59.000Z

254

A Multi-Chamber System for Analyzing the Outgassing, Deposition,and Associated Optical Degradation Properties of Materials in a Vacuum  

Science Conference Proceedings (OSTI)

We report on the Camera Materials Test Chamber, a multi-vessel apparatus which analyzes the outgassing consequences of candidate materials for use in the vacuum cryostat of a new telescope camera. The system measures the outgassing products and rates of samples of materials at different temperatures, and collects films of outgassing products to measure the effects on light transmission in six optical bands. The design of the apparatus minimizes potential measurement errors introduced by background contamination.

Singal, Jack; Schindler, Rafe; Chang, Chihway; Czodrowski, Patrick; Kim, Peter; /KIPAC, Menlo Park /SLAC /Stanford U.

2009-12-11T23:59:59.000Z

255

Establishment of very uniform gas-flow pattern in the process chamber for microwave-excited high-density plasma by ceramic shower plate  

SciTech Connect

The authors developed a ceramic upper shower plate used in the microwave-excited high-density plasma process equipment incorporating a dual shower-plate structure to establish a very uniform gas-flow pattern in the process chamber. Thousands of very fine gas-injection holes are implemented on this Al{sub 2}O{sub 3} upper shower plate with optimized allocation to establish a uniform gas-flow pattern of plasma-excitation gases and radical-generation gases for generating intended radicals in the plasma-excitation region. The size of these fine holes must be 50 {mu}m or less in diameter and 8 mm or more in length because these holes perform an essential role: They completely avoid the plasma excitation in these fine holes and upper gas-supply regions resulting from the plasma penetration into these regions from excited high-density plasma, even if very high-density plasma greater than 1x10{sup 12} cm{sup -3} is excited just under the ceramic upper shower plate by microwaves supplied from the radial line slot antenna. On the other hand, various process gases, such as material gases for film formations and etching gases, are supplied from the lower shower plate installed in the diffusion plasma region to this very uniform gas-flow pattern region of plasma-excitation gases and radical-generation gases. As a result, the process gases are supplied to the wafer surface in a very effective manner without excess decomposition of those process gas molecules and undesired reaction-product deposition on the inner surface of the process chamber. The process results are improved drastically by introducing the newly developed ceramic upper shower plate. But also, process uniformity on the entire wafer is improved with drastically reducing reaction-product deposition on the inner surface of the process chamber.

Goto, Tetsuya; Inokuchi, Atsutoshi; Ishibashi, Kiyotaka; Yasuda, Seij; Nakanishi, Toshio; Kohno, Masayuki; Okesaku, Masahiro; Sasaki, Masaru; Nozawa, Toshihisa; Hirayama, Masaki; Ohmi, Tadahiro [New Industry Creation Hatchery Center, Tohoku University, Sendai 980-8579 (Japan); Tokyo Electron Ltd., Tokyo 107-6325 (Japan); Tokyo Electron Technology Development Institute, Inc., Hyogo 660-0891 (Japan); New Industry Creation Hatchery Center, Tohoku University, Sendai 980-8579 (Japan); Tokyo Electron AT Ltd., Hyogo 660-0891 (Japan); Hokuriku Seikei Industrial, Co., Ltd., Ishikawa 923-0157 (Japan); Tokyo Electron Technology Development Institute, Inc., Hyogo 660-0891 (Japan); New Industry Creation Hatchery Center, Tohoku University, Sendai 980-8579 (Japan)

2009-07-15T23:59:59.000Z

256

DESIGN NOTE TRIUMF 4004 WESBROOK MALL, VANCOUVER, B.C. CANADA V6T 2A3  

E-Print Network (OSTI)

: almost any beam we put into it will be spat out a few turns later; but not necessarily at the correct

Koscielniak, Shane

257

JOURNALDE PHYSIQUE IV Colloque C3, supplkmentau Journal de Physique11,Volume3,ao6t 1993  

E-Print Network (OSTI)

Silicon nitride was deposited from disilane and ammonia reactant gases under LPCVD conditions, silicon nitride elaborated by LPCVD is investigated with a particular attention paid to disilane (Si2H6, which were injected through the door of furnace. Disilane (or DS) and ammonia (NHg were used as source

Paris-Sud XI, Université de

258

The suitability of large area drift chambers as the technology choice for the Cosmic Ray Inspection and Passive Tomography (CRIPT) project  

SciTech Connect

The CRIPT project brings together several Canadian institutions, concerned with the detection of Special Nuclear Materials (SNM), addressing a requirement at ports-of-entry for detection of SNM in the many thousands of containers that flow into and out of Canada every day, while at the same time providing a way of monitoring the contents of nuclear waste storage containers, for waste management and non-proliferation reasons. The scale of these applications is large - typically tens of cubic metres, requiring detectors that can cover a large area at a minimum cost. The CRIPT project considered drift chambers adapted from high energy physics experience, as one of its technology choices. We report here on the performance of a full scale prototype, which covers an area of 2.4 m x 1.2 m with only 6 readout channels, and provides a 2D data point with accuracies (in x and z) of around 2 mm. (authors)

Anghel, V. [Atomic Energy Canada Ltd., Chalk River, ON K0J 1J0 (Canada); Armitage, J. [Carleton Univ., Ottawa, ON (Canada); Botte, J.; Boudjemline, K. [Carleton Univ., Ottawa, ON (Canada); Bryman, D.; Bueno, J. [Advanced Applied Physics Solutions, Vancouver, BC (Canada); Charles, E. [Canadian Border Services Agency, Ottawa, ON K1A 0L8 (Canada); Cousins, T. [International Safety Research, Ottawa, ON K2E 7J6 (Canada); Erlandson, A. [Carleton Univ., Ottawa, ON (Canada); Gallant, G. [Canadian Border Services Agency, Ottawa, ON K1A 0L8 (Canada); Jewett, C.; Jonkmans, G. [Atomic Energy Canada Ltd., Chalk River, ON K0J 1J0 (Canada); Liu, Z. [Advanced Applied Physics Solutions, Vancouver, BC (Canada); Noel, S. [International Safety Research, Ottawa, ON K2E 7J6 (Canada); Oakham, F. G. [Carleton Univ., Ottawa, ON (Canada); Stocki, T. J. [Health Canada, Ottawa, ON K1A 0K9 (Canada); Thompson, M. [Atomic Energy Canada Ltd., Chalk River, ON K0J 1J0 (Canada); Waller, D. [Defence Research Development Canada, Ottawa, ON K1A 0Z4 (Canada)

2011-07-01T23:59:59.000Z

259

A 72 channel 125 MSPS analog-to-digital converter module for drift chamber readout for the GlueX detector  

SciTech Connect

We have developed a very high channel density custom A/D converter module for the drift chamber readout requirements of the Glue-X detector at Jefferson Lab Hall-D. This 6U VME64 module has 72 channels, including a low noise differential line receiver, cable frequency response equalization, and signal shaping with a 5th order filter. The signals are digitized at 125 MSPS with an assembly option for either 12 or 14 bit resolution (GlueX will use 12 bit). The digitized data is written continuously to a circular buffer, with an independent read port and pipelined readout path able to extract potentially overlapping signal records at a 200 kHz trigger rate without deadtime. The extracted data is zero suppressed and may be further processed on-board to reduce the data volume, and is then assembled into event records and event block records. Up to 1 MB of output data is buffered on-board and available for readout via 2eSST at up to 320 MByte/s.

G. visser, D. Abbot, F. Barbosa, C. Cuevas, H. Dong, E. Jastrzembski, B. Moffitt, B. Raydo

2011-06-01T23:59:59.000Z

260

A dynamic soil chamber system coupled with a tunable diode laser for online measurements of delta-13C, delta-18O, and efflux rate of soil respired CO2  

Science Conference Proceedings (OSTI)

High frequency observations of the stable isotopic composition of CO(2) effluxes from soil have been sparse due in part to measurement challenges. We have developed an open-system method that utilizes a flow-through chamber coupled to a tunable diode laser (TDL) to quantify the rate of soil CO(2) efflux and its delta(13)C and delta(18)O values (delta(13)C(R) and delta(18)O(R), respectively). We tested the method first in the laboratory using an artificial soil test column and then in a semi-arid woodland. We found that the CO(2) efflux rates of 1.2 to 7.3 micromol m(-2) s(-1) measured by the chamber-TDL system were similar to measurements made using the chamber and an infrared gas analyzer (IRGA) (R(2) = 0.99) and compared well with efflux rates generated from the soil test column (R(2) = 0.94). Measured delta(13)C and delta(18)O values of CO(2) efflux using the chamber-TDL system at 2 min intervals were not significantly different from source air values across all efflux rates after accounting for diffusive enrichment. Field measurements during drought demonstrated a strong dependency of CO(2) efflux and isotopic composition on soil water content. Addition of water to the soil beneath the chamber resulted in average changes of +6.9 micromol m(-2) s(-1), -5.0 per thousand, and -55.0 per thousand for soil CO(2) efflux, delta(13)C(R) and delta(18)O(R), respectively. All three variables initiated responses within 2 min of water addition, with peak responses observed within 10 min for isotopes and 20 min for efflux. The observed delta(18)O(R) was more enriched than predicted from temperature-dependent H(2)O-CO(2) equilibration theory, similar to other recent observations of delta(18)O(R) from dry soils (Wingate L, Seibt U, Maseyk K, Ogee J, Almeida P, Yakir D, Pereira JS, Mencuccini M. Global Change Biol. 2008; 14: 2178). The soil chamber coupled with the TDL was found to be an effective method for capturing soil CO(2) efflux and its stable isotope composition at high temporal frequency.

Powers, Heath H [Los Alamos National Laboratory; Mcdowell, Nate [Los Alamos National Laboratory; Hanson, David [UNM; Hunt, John [LANDCARE RESEARCH

2009-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "xmcd chamber 6t" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

Plenum type crystal growth chamber  

DOE Patents (OSTI)

Crystals are grown in a tank which is divided by a baffle into a crystal growth region above the baffle and a plenum region below the baffle. A turbine blade or stirring wheel is positioned in a turbine tube which extends through the baffle to generate a flow of solution from the crystal growing region to the plenum region. The solution is pressurized as it flows into the plenum region. The pressurized solution flows back to the crystal growing region through return flow tubes extending through the baffle. Growing crystals are positioned near the ends of the return flow tubes to receive a direct flow of solution.

Montgomery, K.E.

1990-12-31T23:59:59.000Z

262

Albright addresses Chamber of Commerce  

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

edge biological sciences and sensor capabilities and new materials developed through additive manufacturing. "We are the secret sauce that makes this country competitive," he...

263

Ion-driver fast ignition: Reducing heavy-ion fusion driver energy and cost, simplifying chamber design, target fab, tritium fueling and power conversion  

DOE Green Energy (OSTI)

Ion fast ignition, like laser fast ignition, can potentially reduce driver energy for high target gain by an order of magnitude, while reducing fuel capsule implosion velocity, convergence ratio, and required precisions in target fabrication and illumination symmetry, all of which should further improve and simplify IFE power plants. From fast-ignition target requirements, we determine requirements for ion beam acceleration, pulse-compression, and final focus for advanced accelerators that must be developed for much shorter pulses and higher voltage gradients than today's accelerators, to deliver the petawatt peak powers and small focal spots ({approx}100 {micro}m) required. Although such peak powers and small focal spots are available today with lasers, development of such advanced accelerators is motivated by the greater likely efficiency of deep ion penetration and deposition into pre-compressed 1000x liquid density DT cores. Ion ignitor beam parameters for acceleration, pulse compression, and final focus are estimated for two examples based on a Dielectric Wall Accelerator; (1) a small target with {rho}r {approx} 2 g/cm{sup 2} for a small demo/pilot plant producing {approx}40 MJ of fusion yield per target, and (2) a large target with {rho}r {approx} 10 g/cm{sup 2} producing {approx}1 GJ yield for multi-unit electricity/hydrogen plants, allowing internal T-breeding with low T/D ratios, >75 % of the total fusion yield captured for plasma direct conversion, and simple liquid-protected chambers with gravity clearing. Key enabling development needs for ion fast ignition are found to be (1) ''Close-coupled'' target designs for single-ended illumination of both compressor and ignitor beams; (2) Development of high gradient (>25 MV/m) linacs with high charge-state (q {approx} 26) ion sources for short ({approx}5 ns) accelerator output pulses; (3) Small mm-scale laser-driven plasma lens of {approx}10 MG fields to provide steep focusing angles close-in to the target (built-in as part of each target); (4) beam space charge-neutralization during both drift compression and final focus to target. Except for (1) and (2), these critical issues may be explored on existing heavy-ion storage ring accelerator facilities.

Logan, G.; Callahan-Miller, D.; Perkins, J.; Caporaso, G.; Tabak, M.; Moir, R.; Meier, W.; Bangerter, Roger; Lee, Ed

1998-04-01T23:59:59.000Z

264

A large liquid argon time projection chamber for long-baseline, off-axis neutrino oscillation physics with the NuMI beam  

Science Conference Proceedings (OSTI)

Results from neutrino oscillation experiments in the last ten years have revolutionized the field of neutrino physics. While the overall oscillation picture for three neutrinos is now well established and precision measurements of the oscillation parameters are underway, crucial issues remain. In particular, the hierarchy of the neutrino masses, the structure of the neutrino mixing matrix, and, above all, CP violation in the neutrino sector are the primary experimental challenges in upcoming years. A program that utilizes the newly commissioned NuMI neutrino beamline, and its planned upgrades, together with a high-performance, large-mass detector will be in an excellent position to provide decisive answers to these key neutrino physics questions. A Liquid Argon time projection chamber (LArTPC) [2], which combines fine-grained tracking, total absorption calorimetry, and scalability, is well matched for this physics program. The few-millimeter-scale spatial granularity of a LArTPC combined with dE/dx measurements make it a powerful detector for neutrino oscillation physics. Scans of simulated event samples, both directed and blind, have shown that electron identification in {nu}{sub e} charged current interactions can be maintained at an efficiency of 80%. Backgrounds for {nu}{sub e} appearance searches from neutral current events with a {pi}{sup 0} are reduced well below the {approx} 0.5-1.0% {nu}{sub e} contamination of the {nu}{sub {mu}} beam [3]. While the ICARUS collaboration has pioneered this technology and shown its feasibility with successful operation of the T600 (600-ton) LArTPC [4], a detector for off-axis, long-baseline neutrino physics must be many times more massive to compensate for the low event rates. We have a baseline concept [5] based on the ICARUS wire plane structure and commercial methods of argon purification and housed in an industrial liquefied-natural-gas tank. Fifteen to fifty kton liquid argon capacity tanks have been considered. A very preliminary cost estimate for a 50-kton detector is $100M (unloaded) [6]. Continuing R&D will emphasize those issues pertaining to implementation of this very large scale liquid argon detector concept. Key hardware issues are achievement and maintenance of argon purity in the environment of an industrial tank, the assembly of very large electrode planes, and the signal quality obtained from readout electrodes with very long wires. Key data processing issues include an initial focus on rejection of cosmic rays for a surface experiment. Efforts are underway at Fermilab and a small number of universities in the US and Canada to address these issues with the goal of embarking on the construction of industrial-scale prototypes within one year. One such prototype could be deployed in the MiniBooNE beamline or in the NuMI surface building where neutrino interactions could be observed. These efforts are complementary to efforts around the world that include US participation, such as the construction of a LArTPC for the 2-km detector location at T2K [7]. The 2005 APS neutrino study [1] recommendations recognize that ''The development of new technologies will be essential for further advances in neutrino physics''. In a recent talk to EPP2010, Fermilab director P. Oddone, discussing the Fermilab program, states on his slides: ''We want to start a long term R&D program towards massive totally active liquid Argon detectors for extensions of NOvA''. [8]. As such, we are poised to enlarge our R&D efforts to realize the promise of a large liquid argon detector for neutrino physics.

Finley, D.; Jensen, D.; Jostlein, H.; Marchionni, A.; Pordes, S.; Rapidis, P.A.; /Fermilab; Bromberg, C.; /Michigan State U.; Lu, C.; McDonald, T.; /Princeton U.; Gallagher, H.; Mann, A.; Schneps, J.; /Tufts U.; Cline, D.; Sergiampietri, F.; Wang, H.; /UCLA; Curioni, A.; Fleming, B.T.; /Yale U.; Menary, S.; /York U., Canada

2005-09-01T23:59:59.000Z

265

DEVELOPMENT OF A 40 mm BORE MAGNET CROSS SECTION WITH HIGH FIELD UNIFORMITY FOR THE 6.6T SSC DIPOLE  

E-Print Network (OSTI)

R. Femow, "KAG 2," Brookhaven National Lab- oratory, BNLDipole with C5 Coils," Brookhaven National Laboratory, SSCR. Fernow and G. Korgan (Brookhaven National Labor- atory)

Caspi, S.

2010-01-01T23:59:59.000Z

266

DEVELOPMENT OF A 40 mm BORE MAGNET CROSS SECTION WITH HIGH FIELD UNIFORMITY FOR THE 6.6T SSC DIPOLE  

E-Print Network (OSTI)

Office of High Energy and Nuclear Physics, High EnergyOffice of High Energy and Nuclear Physics, High Energy

Caspi, S.

2010-01-01T23:59:59.000Z

267

Pyrolysis reactor and fluidized bed combustion chamber  

DOE Patents (OSTI)

A solid carbonaceous material is pyrolyzed in a descending flow pyrolysis reactor in the presence of a particulate source of heat to yield a particulate carbon containing solid residue. The particulate source of heat is obtained by educting with a gaseous source of oxygen the particulate carbon containing solid residue from a fluidized bed into a first combustion zone coupled to a second combustion zone. A source of oxygen is introduced into the second combustion zone to oxidize carbon monoxide formed in the first combustion zone to heat the solid residue to the temperature of the particulate source of heat.

Green, Norman W. (Upland, CA)

1981-01-06T23:59:59.000Z

268

Combustion chamber for a commercial laundry dryer  

SciTech Connect

This patent describes combustion for a laundry article-drying device or the like, comprising: a front wall; a back wall having a flame source mounted thereon; a burner cylinder mounted at one end to the back wall around the flame source, the burner cylinder having an open end facing the front wall; and a heating cylinder coaxial with and slightly overlapping the burner cylinder. The heating cylinder has a larger diameter than the burner cylinder to provide a clearance for fresh air entering between the heating and burner cylinders into the heating cylinder.

Grantham, C.R.

1986-12-02T23:59:59.000Z

269

TRIGGERING THE LBL TIME PROJECTION CHAMBER  

E-Print Network (OSTI)

Majority trigger recording for simulated event. Fig. 13 dE/11 Ripple trigger recording for simulated event. ENDCAP 0The ripple trigger recording for this test event is shown in

Ronan, M.

2010-01-01T23:59:59.000Z

270

Depth Profile of Uncompensated Spins in an Exchange-Bias System  

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

questions remain unanswered or inadequately answered. For example, photoemission electron microscope (PEEM) images and x-ray circular magnetic dichroism (XMCD) studies...

271

TRIUMF 4004 Wesbrook Mall, Vancouver, B.C. V6T 2A3, Canada DESIGN NOTE S.R. Koscielniak June 2003 TRI-DN-97-12 v3.2  

E-Print Network (OSTI)

) = 0 0 xr rr -qhr + uxr + vrr -qer . In the previous relations P is the total gas pres- sure Te x , qer = -ke Te r , with kh equal to the thermal conductivity of the heavy particles and ke equal

Koscielniak, Shane

272

Published by Information Services, University of B.C., 2075 Wesbrook Mail, Vancouver. 6.C: V6T 1W5. 228-3131. J. A. Banham and Judith Walker, editors. VOl. 23, NO. 16.  

E-Print Network (OSTI)

into landfill projects,Dr.Cameron says, and extractionof the gas fromold B.C.garbage dumpsmaybecome feasible was a direct result of limited operating grants, nearly stable overall Continuedon p.2 "Title change" Shearer engineering in the Faculty of Applied Science,says garbage dumplandfills generate methane,an inflammable gas

Farrell, Anthony P.

273

Chambers County, Texas: Energy Resources | Open Energy Information  

Open Energy Info (EERE)

Texas: Energy Resources Texas: Energy Resources Jump to: navigation, search Equivalent URI DBpedia Coordinates 29.7524956°, -94.6863782° 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":29.7524956,"lon":-94.6863782,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

274

www.ornl.gov Environmental Chambers at ORNL  

E-Print Network (OSTI)

-air HVAC system, heat pump water heaters, a dehumidifying water heater, solid-state lighting, hybrid solar for testing appliances such as residential water heaters and refrigerators. · Two large two-room, side temperature cycles to test heat pump/AC equipment under quasi- field conditions. #12;www.ornl.gov Water Heater

Oak Ridge National Laboratory

275

Controlled particle transport in a plasma chamber with striped electrode  

SciTech Connect

The controlled transport of micrometer size dust particles in a parallel-plate radio frequency discharge has been investigated. The lower stainless steel electrode consisted of 100 independently controllable electrical metal stripes. The voltage signals on these stripes were modulated, causing traveling plasma sheath distortions. Because the particles trapped in local potential wells moved according to the direction of the distortion, the transport velocity could be actively controlled by adjusting frequencies and phase shifts of the applied periodic voltage signals. To investigate the detailed principle of this transport, molecular dynamic simulations was performed to reproduce the observations with the plasma background conditions calculated by separated particle-in-cell simulations for the experimental parameters. The findings will help develop novel technologies for investigating large-scale complex plasma systems and techniques for achieving clean environments in plasma processing reactors.

Jiang Ke; Li Yangfang; Shimizu, T.; Konopka, U.; Thomas, H. M.; Morfill, G. E. [Max-Planck-Institute for Extraterrestrial Physics, 85748 Garching (Germany)

2009-12-15T23:59:59.000Z

276

Chambers County, Alabama: Energy Resources | Open Energy Information  

Open Energy Info (EERE)

Alabama: Energy Resources Alabama: Energy Resources Jump to: navigation, search Equivalent URI DBpedia Coordinates 32.9028048°, -85.354965° 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":32.9028048,"lon":-85.354965,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

277

SMALL CHAMBER MEASUREMENT OF CHEMICAL SPECIFIC EMISSION FACTORS...  

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

tests that provide elemental characterization of drywall, characterization of chemical emissions, and in-home air sampling. The chemical emission testing was conducted at...

278

Coal-feeding mechanism for a fluidized bed combustion chamber  

SciTech Connect

The present invention is directed to a fuel-feeding mechanism for a fluidized bed combustor. In accordance with the present invention a perforated conveyor belt is utilized in place of the fixed grid normally disposed at the lower end of the fluidized bed combustion zone. The conveyor belt is fed with fuel, e.g. coal, at one end thereof so that the air passing through the perforations dislodges the coal from the belt and feeds the coal into the fluidized zone in a substantially uniform manner.

Gall, Robert L. (Morgantown, WV)

1981-01-01T23:59:59.000Z

279

CALCULATION OF PULSED KICKER MAGNETIC FIELD ATTENUATION INSIDE BEAM CHAMBERS  

E-Print Network (OSTI)

Petroleum Institute, and CENPES/Petrobrás in Brazil. REFERENCES Agência Nacional do Petróleo (ANP). 1999. http://www.anp.gov.br. Alvarez, P.J.J. and Vogel, T.M. 1995. Degradation of BTEX and their aerobic

Kemner, Ken

280

Overview of Chamber and Power Plant Designs for IFE  

E-Print Network (OSTI)

as primary coolant minimizing need for leak tight blanket structures. · Vacuum boundary was separate from · Z-IFE "Z-Inertial Fusion Energy: Power Plant Final Report FY 2006" SANDIA REPORT SAND2006

Note: This page contains sample records for the topic "xmcd chamber 6t" 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

Thirdhand cigarette smoke in an experimental chamber: evidence...  

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

into the air and undergo chemical changes as it ages. Objectives To test the effects of aging on the concentration of polycyclic aromatic hydrocarbons (PAHs), nicotine and...

282

THE LASER OF THE ALICE TIME PROJECTION CHAMBER  

E-Print Network (OSTI)

The large TPC (95 m 3) of the ALICE detector at the CERN LHC was commissioned in summer 2006. The first tracks were observed both from the cosmic ray muons and from the laser rays injected into the TPC. In this article the basic principles of operating the 266 nm lasers are presented, showing the installation and adjustment of the optical system and describing the control system. To generate the laser tracks, a wide laser beam is split into several hundred narrow beams by fixed micro-mirrors at stable and known positions throughout the TPC. In the drift volume, these narrow beams generate straight tracks at many angles. Here we describe the generation of the first tracks and compare them with simulations. 1.

G. Renault; B. S. Nielsen; J. Westergaard; J. J. Gaardhje

2007-01-01T23:59:59.000Z

283

Laser IFE Direct Drive Chamber Concepts with Magnetic Intervention  

Science Conference Proceedings (OSTI)

High Average Power Laser and Other IFE R&D / Eighteenth Topical Meeting on the Technology of Fusion Energy (Part 1)

A. R. Raffray et al.

284

Proceedings of the Workshop on Radiation Damage to Wire Chambers  

E-Print Network (OSTI)

irradiated Iwire 50 JL 50 JL 6mm 6mm 2150 volts 68 em 1-2 JLamp 1800 volts 62 cm .1 JLamp t run Qaccumulated 10 7z LU W V1 w VI I- w Z VOLTS Fig. 1 Operating characteristics

Kadyk, J.A.

2010-01-01T23:59:59.000Z

285

Response of Ionization Chambers to High-Energy Monoenergetic Neutrons  

Science Conference Proceedings (OSTI)

Detectors / Special Issue on the 11th International Conference on Radiation Shielding and the 15th Topical Meeting of the Radiation Protection and Shielding Division (Part 1) / Radiation Protection

H. Vincke; D. Forkel-Wirth; H. G. Menzel; S. Roesler; C. Theis; M. Widorski; K. Hatanaka; H. Yashima; T. Nakamura; S. Taniguchi; N. Nakao; A. Tamii

286

Chamber Design for the Laser Inertial Fusion Energy (LIFE) Engine  

Science Conference Proceedings (OSTI)

IFE - NIF & LIFE / Proceedings of the Nineteenth Topical Meeting on the Technology of Fusion Energy (TOFE) (Part 1)

Jeffery F. Latkowski et al.

287

Donald Glaser, the Bubble Chamber, and Elementary Particles  

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

at the University of California, Berkeley Research Interests and Current Projects Vision Science Graduate Program Faculty Physics Nobelist and Biotech Pioneer Donald Glaser ......

288

ACPYPE - AnteChamber PYthon Parser interfacE  

E-Print Network (OSTI)

', 'A19', 'A1t', 'A38', 'A3d', 'A43', 'A70', 'A85', 'A9a', 'Aa5', 'Abd', 'Acf', 'Ad6', 'Aeb', 'Ah1', 'Ai', 'Akp', 'Anj', 'Atc', 'Azd', 'Aze', 'Bah', 'Bbr', 'Bcr', 'Bik', 'Biz', 'Blt', 'Bmv', 'Btb', 'Bth', 'C03', 'C1b', 'C7p', 'Ca3', 'Ca5', 'Cbe...

Sousa da Silva, Alan W; Vranken, Wim F

2012-07-23T23:59:59.000Z

289

Realistic modeling of chamber transport for heavy-ion fusion  

E-Print Network (OSTI)

3-m pipe lined with a molten-salt vortex to protect thesurface. This molten-salt layer is modeled as an insulatorand LiF vapor from the molten salt jets used to protect the

2003-01-01T23:59:59.000Z

290

Chamber transport of "foot" pulses for heavy-ion fusion  

E-Print Network (OSTI)

resulting from the molten-salt jets planned for wallin Section III E, the molten-salt jets themselves arechamber transport. A molten salt composed of fluorine,

Sharp, W.M.; Callahan-Miller, D.A.; Tabak, M.; Yu, S.S.; Peterson, P.F.

2002-01-01T23:59:59.000Z

291

Simulation of chamber transport for heavy-ion fusion  

E-Print Network (OSTI)

power plant use jets of molten salt to protect the fusion-environment, particularly the molten-salt jets and multiplecrisscrossed jets of molten salt. Corner beams are omitted

2002-01-01T23:59:59.000Z

292

USE OF A STREAMER CHAMBER FOR LOW ENERGY NUCLEAR PHYSICS  

E-Print Network (OSTI)

in hybrid experiments, where the event trigger consists of aof trigger bias. The fraction of real to random events would

Bibber, K. Van

2010-01-01T23:59:59.000Z

293

STATE OF NEW YORK EXECUTIVE CHAMBER DAVID A. PATERSON GOVERNOR  

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

Department of Energy 1000 Independence Avenue, S. W Washington, D.C. 20585 Re: State Energy Prowam Assistance Dear Secretary Chu: As a condition of receiving New York State's...

294

!#"%$'&)(1023547698@&)(A0BC8EDGF HI"QPR"S476T8@&U(A02WVXDG0Y(`4!FG0Yab47P)47D'#4!c "dF476e6T0eDgf h@iqprits'uviwsrxypp  

E-Print Network (OSTI)

¿TÁT???½Y?¯E¯r¯r¯E¯r¯E¯r¯@¯E¯r¯r¯E¯r¯E¯r¯r¯E¯r¯@¯E¯r¯E¯r¯r¯E¯r¯E¯r¯r¯r¯r¯r¯ ? ®t¯?® ·)???¹»??¼?5²e³Í´eµ7¶·U·¸Ï?¢Ð¾¿9?#¯r¯E¯r¯E¯r¯@¯E¯r¯r¯E¯r¯E¯r¯r¯E¯r¯@¯E¯r¯E¯r¯r¯E¯r¯E¯r¯r¯r¯r¯r¯ ? ®t¯?? ²e³´¬µ7¶·U·¸º?¼Ð??g???m?½??? ¯r¯r¯E¯r¯E¯r¯@¯E¯r¯r¯E¯r¯E¯r¯r¯E¯r¯@¯E¯r¯E¯r¯r¯E¯r¯E¯r¯r¯r¯r¯r¯ ? ®t¯?? ´e?»?Ð?¹»??¼?²e³´¬µ7¶·U·¸ ¯r

Buckingham, Michael

295

Negative plasma potential in a multidipole chamber with a dielectric coated plasma boundary  

SciTech Connect

Negative plasma potentials with respect to a grounded wall that was coated with a dielectric have been achieved in an electropositive plasma confined by a multidipole device. A Langmuir probe was used to measure the density and temperatures of the bi-Maxwellian distribution electrons and an emissive probe was used to measure the plasma potential profile near the plasma boundary. For many discharge parameters, the potential profile was that of a typical electropositive sheath, but it was shifted negative due to negative charge accumulated on the plasma-surface boundary. A virtual cathode was observed near the boundary when the neutral pressure, primary electron energy, and/or discharge current were low ({approx}2 x 10{sup -4} Torr, {approx}60 eV, and 80 mA, respectively). The behavior of the sheath potential was shown to be consistent with that predicted by particle balance and a qualitative mechanism for wall charging is presented.

Sheehan, J. P.; Hershkowitz, Noah [Department of Nuclear Engineering and Engineering Physics, University of Wisconsin-Madison, Madison, Wisconsin 53706 (United States)

2012-05-15T23:59:59.000Z

296

A Continuous, In-Chamber Target Tracking and Engagement Approach for Laser Fusion (A25684)  

E-Print Network (OSTI)

Proc. Of 17th ANS Top. Mtg On Technology Of Fusion Energy (TOFE), Albuquerque, New Mexico, 2006; To Be Published In Fusion Sci. And Technol.17th Topical Meeting on Technology Fusion Energy Albuquerque New Mexico, US, 2006999613570

Petzoldt, R.W.

2006-12-15T23:59:59.000Z

297

Toward an Integrated Simulation Predictive Capability for Fusion Plasma Chamber Systems  

Science Conference Proceedings (OSTI)

Power Plants, Demo, and Next Steps / Eighteenth Topical Meeting on the Technology of Fusion Energy (Part 2)

A. Ying; M. Narula; M. Abdou; R. Munipalli; M. Ulrickson; P. Wilson

298

Primary and secondary emissions from green building materials : large chamber experiments.  

E-Print Network (OSTI)

??Indoor sources of air pollution generate a large fraction of overall human exposure to airborne pollutants. Materials used in buildings have been shown to be (more)

Gall, Elliott Tyler

2010-01-01T23:59:59.000Z

299

A template modeling for an assembly control : the source chamber alignment  

E-Print Network (OSTI)

Managers and engineers are trying to lead Varian Semiconductor Equipment to a flow line shipment program, the intent being to eliminate the clean room area and ship all of the components of the ion implanter directly from ...

Guerra, Simone, M. Eng. Massachusetts Institute of Technology

2007-01-01T23:59:59.000Z

300

Combustion Chamber Fluid Dynamics and Hypergolic Gel Propellant Chemistry Simulations for Selectable Thrust Rocket Engines  

Science Conference Proceedings (OSTI)

This paper describes the application of high performance computing to accelerate the development of hypergolic propulsion systems for tactical missiles. Computational fluid dynamics is employed to model the chemically reacting flow within a system's ...

M. Nusca; C.-C. Chen; M. McQuaid

2007-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "xmcd chamber 6t" 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

Combustion Chamber Fluid Dynamics and Hypergolic Gel Propellant Chemistry Simulations for Selectable Thrust Rocket Engines  

Science Conference Proceedings (OSTI)

This paper describes the development and application of high performance computing for the acceleration of tactical missile hypergolic propulsion system development. Computational fluid dynamics is employed to model the chemically reacting flow within ...

Michael J. Nusca; Michael J. McQuaid

2006-06-01T23:59:59.000Z

302

Combustion Chamber Fluid Dynamics and Hypergolic Gel Propellant Chemistry Simulations for Selectable Thrust Rocket Engines  

Science Conference Proceedings (OSTI)

This paper describes the development and application of high performance computing for the acceleration of tactical missile hypergolic propulsion system development. Computational fluid dynamics (CFD) is employed to model the chemically reacting flow ...

Michael J. Nusca; Michael J. McQuaid

2005-06-01T23:59:59.000Z

303

Combustion Chamber Fluid Dynamics and Hypergolic Gel Propellant Chemistry Simulations for Selectable Thrust Rocket Engines  

Science Conference Proceedings (OSTI)

This paper describes the application of high performance computing to accelerate the development of hypergolic propulsion systems for tactical missiles. Computational fluid dynamics is employed to model the chemically reacting flow within a systems ...

Michael J. Nusca; Chiung-Chu Chen; Michael J. McQuaid

2008-07-01T23:59:59.000Z

304

Combustion Chamber Fluid Dynamics and Hypergolic Gel Propellant Chemistry Simulations for Selectable Thrust Rocket Engines  

Science Conference Proceedings (OSTI)

The Army is developing gelled bipropellants and tactical missile propulsion systems that utilize these propellants for future combat systems. The use of hypergolic gel propellants introduces new capabilities for selectable thrust missiles while at the ...

Michael J. Nusca; Michael J. McQuaid

2004-06-01T23:59:59.000Z

305

A GEM-based Time Projection Chamber for the AMADEUS experiment  

E-Print Network (OSTI)

In this paper we present the R&D activity on a new GEM-based TPC prototype for AMADEUS, a new experimental proposal at the DA{\\Phi}NE {\\Phi}-factory at the Laboratori Nazionali di Frascati (INFN), aiming to perform measurements of the low-energy negative kaons interactions in nuclei. Such innovative detector will equip the inner part of the experiment in order to perfom a better reconstruction of the primary vertex and the secondary particles tracking. A 10x10 cm2 prototype with a drift gap up to 15 cm was realized and succesfully tested at the {\\pi} M1 beam facility of the Paul Scherrer Institut (PSI) with low momentum hadrons. The measurements of the detector efficiency and spatial resolution have been performed. The results as a function of the gas gain, drift field, front-end electronic threshold and particle momentum are reported and discussed.

M. Poli Lener; M. Bazzi; G. Corradi; C. Curceanu; A. D'Uffizi; C. Paglia; E. Sbardella; A. Scordo; D. Tagnani; A. Romero Vidal; J. Zmeskal

2013-04-23T23:59:59.000Z

306

A Unified Model for Ion Deposition and Theromomechanical Response in Dry Wall Laser IFE Chambers  

Science Conference Proceedings (OSTI)

High Average Power Laser and Other IFE R&D / Eighteenth Topical Meeting on the Technology of Fusion Energy (Part 1)

James P. Blanchard; Qiyang Hu; Nasr Ghoniem

307

Conceptual Design of Low Activation NIF Target Chamber and Components (A22377)  

E-Print Network (OSTI)

Proc. Of The 12th Top. Mtg On Technology Fusion Energy, Reno, Nevada, To Be Published.12th Topical Meeting on Technology Fusion Energy Reno Nevada, US, 1996932761026

Streckert, H.H.

1996-06-01T23:59:59.000Z

308

Toward a comparative study of protein crystallization in microfluidic chambers using vapor diffusion and batch techniques  

Science Conference Proceedings (OSTI)

Using microfluidics for protein crystallization gives numerous advantages compared with classical techniques, as much reduced protein consumption, improved control accuracy and high parallelism. We propose here novel systems for the screening of protein ... Keywords: Microfluidic, Nanotechnology, Protein crystallization, Structural biology

M. Lounaci; P. Rigolet; G. Velve Casquillas; H. W. Huang; Y. Chen

2006-04-01T23:59:59.000Z

309

Resistive Wall Heating Due to Image Current on the Beam Chamber  

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

as a function of the harmonics n f(M f 0 ). By applying the anomalous skin effect (green curves) for alpha > 3, the calculated heat load per unit length was 2.13 Wm. By...

310

Thermal characteristics of air flow cooling in the lithium ion batteries experimental chamber  

DOE Green Energy (OSTI)

A battery pack prototype has been designed and built to evaluate various air cooling concepts for the thermal management of Li-ion batteries. The heat generation from the Li-Ion batteries was simulated with electrical heat generation devices with the same dimensions as the Li-Ion battery (200 mm x 150 mm x 12 mm). Each battery simulator generates up to 15W of heat. There are 20 temperature probes placed uniformly on the surface of the battery simulator, which can measure temperatures in the range from -40 C to +120 C. The prototype for the pack has up to 100 battery simulators and temperature probes are recorder using a PC based DAQ system. We can measure the average surface temperature of the simulator, temperature distribution on each surface and temperature distributions in the pack. The pack which holds the battery simulators is built as a crate, with adjustable gap (varies from 2mm to 5mm) between the simulators for air flow channel studies. The total system flow rate and the inlet flow temperature are controlled during the test. The cooling channel with various heat transfer enhancing devices can be installed between the simulators to investigate the cooling performance. The prototype was designed to configure the number of cooling channels from one to hundred Li-ion battery simulators. The pack is thermally isolated which prevents heat transfer from the pack to the surroundings. The flow device can provide the air flow rate in the gap of up to 5m/s velocity and air temperature in the range from -30 C to +50 C. Test results are compared with computational modeling of the test configurations. The present test set up will be used for future tests for developing and validating new cooling concepts such as surface conditions or heat pipes.

Lukhanin A.; Rohatgi U.; Belyaev, A.; Fedorchenko, D.; Khazhmuradov, M.; Lukhanin, O; Rudychev, I.

2012-07-08T23:59:59.000Z

311

High-voltage tests of UCN storage chamber model with sitall isolators  

E-Print Network (OSTI)

. pumping with a new vacuum post without oil. 4. cleaning of surfaces by discharge ("Radical"). 5. Be pump SSNA 1500. The control of vacuum was carried out with the help vacuum measuring instrument by its helium at pressure of 10 -1 mmHg with simultaneous adsorption other gases by pump SSNA has enabled

Titov, Anatoly

312

Plasma Panel Detectors for MIP Detection for the SLHC and a Test Chamber Design  

E-Print Network (OSTI)

Performance demands for high and super-high luminosity at the LHC (up to 10^35 cm^(-2) sec^(-1) after the 2017 shutdown) and at future colliders demand high resolution tracking detectors with very fast time response and excellent temporal and spatial resolution. We are investigating a new radiation detector technology based on Plasma Display Panels (PDP), the underlying engine of panel plasma television displays. The design and production of PDPs is supported by four decades of industrial development. Emerging from this television technology is the Plasma Panel Sensor (PPS), a novel variant of the micropattern radiation detector. The PPS is fundamentally an array of micro-Geiger plasma discharge cells operating in a non-ageing, hermetically sealed gas mixture . We report on the PPS development program, including design of a PPS Test Cell.

Ball, Robert; Etzion, Erez; Friedman, Peter S; Levin, Daniel S; Moshe, Meny Ben; Weaverdyck, Curtis; Zhou, Bing

2010-01-01T23:59:59.000Z

313

Plasma Panel Detectors for MIP Detection for the SLHC and a Test Chamber Design  

E-Print Network (OSTI)

Performance demands for high and super-high luminosity at the LHC (up to 10^35 cm^(-2) sec^(-1) after the 2017 shutdown) and at future colliders demand high resolution tracking detectors with very fast time response and excellent temporal and spatial resolution. We are investigating a new radiation detector technology based on Plasma Display Panels (PDP), the underlying engine of panel plasma television displays. The design and production of PDPs is supported by four decades of industrial development. Emerging from this television technology is the Plasma Panel Sensor (PPS), a novel variant of the micropattern radiation detector. The PPS is fundamentally an array of micro-Geiger plasma discharge cells operating in a non-ageing, hermetically sealed gas mixture . We report on the PPS development program, including design of a PPS Test Cell.

Robert Ball; John W. Chapman; Erez Etzion; Peter S. Friedman; Daniel S. Levin; Meny Ben Moshe; Curtis Weaverdyck; Bing Zhou

2010-07-03T23:59:59.000Z

314

Lattice Boltzmann for Simulation of Gases Mixture in Fruit Storage Chambers  

Science Conference Proceedings (OSTI)

Fluid Dynamics can be modelled through the Navier?Stokes equations. This description corresponds to a macroscopic definition of the fluid motion phenomena. During the past 20 year new simulation procedures are emerging from Statistical Physics and Computer Science domains. One of them is the Lattice Gas Cellular Automata (LGCA) method. This approach

J. C. Fabero; P. Barreiro; L. Casass

2003-01-01T23:59:59.000Z

315

Prediction of inertial confinement fusion chamber gas evolution using multi-species computational fluid dynamics  

E-Print Network (OSTI)

18] Reactor Design, ChemKin r Software Theory Manual,Reactor Designs ChemKin software package. The ChemKin theory

Martin, Robert Scott

2007-01-01T23:59:59.000Z

316

Homogeneous CondensationFreezing Nucleation Rate Measurements for Small Water Droplets in an Expansion Cloud Chamber  

Science Conference Proceedings (OSTI)

Experimental data on ice nucleation, presented in an earlier paper, are analyzed to yield information about the homogeneous nucleation rate of ice from supercooled liquid and the heights of energy barriers to that nucleation. The experiment ...

Donald E. Hagen; Rodney J. Anderson; James L. Kassner Jr.

1981-06-01T23:59:59.000Z

317

IFE thick liquid wall chamber dynamics: Governing mechanisms and modeling and experimental capabilities  

E-Print Network (OSTI)

Wall Inertial Fusion Reactors " Nuclear Eng. and Design 63,Heavy Ion Beam Fusion Reactor," Nuclear J. P E R L A D O ,

2005-01-01T23:59:59.000Z

318

500-kV Non-Ceramic Insulator Aging Chamber: Final Report  

Science Conference Proceedings (OSTI)

This report will help utilities and manufacturers understand primary non-ceramic insulator (NCI) aging mechanisms and allow them to compare the ability of a number of currently available NCI designs to withstand those aging mechanisms. Research results also will be useful for further development of in-service inspection methods.

2000-11-30T23:59:59.000Z

319

Challenges Surrounding the Injection and Arrival of Targets at LIFE Fusion Chamber Center  

Science Conference Proceedings (OSTI)

IFE - NIF & LIFE / Proceedings of the Nineteenth Topical Meeting on the Technology of Fusion Energy (TOFE) (Part 1)

Robin Miles et al.

320

DPD model of foraminiferal chamber formation: simulation of actin meshwork--plasma membrane interactions  

Science Conference Proceedings (OSTI)

Foraminifera are unicellular organisms which are widespread especially in marine environments. They produce protective shells (called tests) around their cell bodies, and these may be hardened by either secreted CaCO3 or by the agglutination ... Keywords: cell physiology, complex fluids, dissipative particle dynamics, foraminifera

Pawe? Topa; Jaros?aw Tyszka; Samuel S. Bowser; Jeffrey L. Travis

2011-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "xmcd chamber 6t" 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

Architectures for individual and stacked micro single chamber solid oxide fuel cells  

E-Print Network (OSTI)

Solid oxide fuel cells (SOFCs) are electrochemical conversion devices that convert various fuel sources directly into electrical energy at temperatures ranging from 600C to 1000C. These high temperatures could potentially ...

Crumlin, Ethan J

2007-01-01T23:59:59.000Z

322

A LARGE HIGH CURRENT DENSITY SUPERCONDUCTING SOLENOID FOR THE TIME PROJECTION CHAMBER EXPERIMENT  

E-Print Network (OSTI)

design mass flow Peak magnet operating temperature Estimated cooling circuit pressure drop Estimated refrigeration

Green, M.A.

2011-01-01T23:59:59.000Z

323

Heating up the forest: open-top chamber warming manipulation of arthropod communities at Harvard  

E-Print Network (OSTI)

, PO Box 68, Petersham, MA 01366, USA, and 4 Department of Ecology & Evolutionary Biology, 569 Dabney

Gotelli, Nicholas J.

324

Waste Management Assessment of Candidate Materials for HiPER Reaction Chamber  

Science Conference Proceedings (OSTI)

IFE Design & Technology / Proceedings of the Nineteenth Topical Meeting on the Technology of Fusion Energy (TOFE) (Part 2)

J. Sanz; R. Jurez; F. Ognissanto; J. M. Perlado

325

IFE thick liquid wall chamber dynamics: Governing mechanisms and modeling and experimental capabilities  

E-Print Network (OSTI)

Metal-Wall Inertial Fusion Reactors " Nuclear Eng. andI A n Inertial Confinement Fusion Reactor," Ph.D. thesis,in Inertial Confinement Fusion Reactors," Ph.D. thesis,

2005-01-01T23:59:59.000Z

326

Development of a Next-Generation Environmental Chamber Facility for Chemical Mechanism and VOC Reactivity Research  

E-Print Network (OSTI)

ethylene, propylene, n-butane and trans-2-butene wereas ethylene, propylene, n-butane and trans-2-butene and 30 mpropane, propylene, n-butane, n-hexane, toluene, n-octane

2005-01-01T23:59:59.000Z

327

IFE thick liquid wall chamber dynamics: Governing mechanisms and modeling and experimental capabilities  

E-Print Network (OSTI)

et al. , "HYLIFE-II: a Molten-Salt Inertial Fusion Energyliquid, such as the molten salts flibe (Li BeF ) orflinabe (of the thick liquid metal or molten salt systems would be to

2005-01-01T23:59:59.000Z

328

Impact of beam transport method on chamber and driver design for heavy ion inertial fusion energy  

E-Print Network (OSTI)

et al. , HYLIFE-II: a molten-salt inertial fusion energyjetted and free-?owing molten salts such as ?ibe (see, for

Rose, D.V.; Welch, D.R.; Olson, C.L.; Yu, S.S.; Neff, S.; Sharp, W.M.

2002-01-01T23:59:59.000Z

329

in the APS Storage Ring Vacuum Chamber Y. Chung Abstract LS-148  

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

This internal vibration can be re- duced by balancing the equipment and isolating the sources. The primary external source of the low frequency vibration is the ground motion...

330

Development of a GEM based detector for the CBM Muon Chamber (MUCH)  

E-Print Network (OSTI)

The characteristics of triple GEM detectors have been studied systematically by using cosmic ray muons. The minimum ionizing particle (MIP) spectra has been taken for different GEM voltage setting. Efficiency of GEM detector has been measured for cosmic ray. At high rate operation of GEMs the value of the protection resistor influences the gain and the stability. This feature has been investigated varying both the rate and the value of the protection resistor. This measurement has been performed using both X-ray generator and Fe55 source. The ageing and long-term stability of GEM based detectors has been studied employing both X-ray generator and Fe55 source. The ageing study of one GEM module is performed by using a 8 keV Cu X-ray generator to verify the stability and integrity of the GEM detectors over a longer period of time. The accumulated charge on the detector is calculated from the rate of the X-ray and the average gain of the detector. The details of the measurement and results has been described in this article.

S. Biswas; D. J. Schmidt; A. Abuhoza; U. Frankenfeld; C. Garabatos; J. Hehner; V. Kleipa; T. Morhardt; C. J. Schmidt; H. R. Schmidt; J. Wiechula

2013-10-02T23:59:59.000Z

331

IFE chamber walls: requirements, design options, and synergy with MFE plasma facing components  

E-Print Network (OSTI)

, Washington, DC, private communication, 2002. [15] A.R. Raffray et al., ISFNT-6 presentation, Fus. Eng. Des a discussion of operating windows. However, for completeness key issues associ- ated with liquid walls are also parameters. 3.2. Operating window A number of conflicting requirements must be con- sidered when considering

Najmabadi, Farrokh

332

U.S. Chamber of Commerce Biofuels Dialogue Series: Outlook for...  

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

real and very significant for many Americans - when they fill up at the pump or face high home-heating bills or try to keep a small business going. Even beyond our own borders, we...

333

Assessment of Chamber Concepts for Inertial Fusion Energy Power Plants The ARIES-IFE study  

E-Print Network (OSTI)

have selected heavy-ion indirect target designs of LLNL/LBL and direct-drive target design of NRL such as target injection and tracking, thermal response of the first wall, and laser or heavy-ion propagation to UC San Diego, are 1) Argonne National Laboratory, 2) Boeing High Energy Systems, 3) General Atomics

Tillack, Mark

334

Assessment of Chamber Concepts for Inertial Fusion Energy Power Plants The ARIES-IFE study  

E-Print Network (OSTI)

have selected heavy-ion indirect target designs of LLNL/LBL and direct-drive target designs of NRL such as target injection and tracking, thermal response of the first wall, and laser or heavy-ion propagation Diego, are 1) Argonne National Laboratory, 2) Boeing High Energy Systems, 3) General Atomics, 4) Georgia

Najmabadi, Farrokh

335

Assessment of Chamber Concepts for Inertial Fusion Energy Power Plants The ARIES-IFE study  

E-Print Network (OSTI)

of such a study is the detailed characterization of the target yield and spectrum. We have selected heavy- ion incident metal mirrors (GIMM) as final optics, propagation and focusing of heavy-ion beams in relatively. Institution involved in ARIES-IFE study, in addition to UC San Diego, are 1) Argonne National Lab., 2) Boeing

California at San Diego, University of

336

Development of a compensation chamber for use in a multiple condenser loop heat pipe  

E-Print Network (OSTI)

The performance of many electronic devices is presently limited by heat dissipation rates. One potential solution lies in high-performance air-cooled heat exchangers like PHUMP, the multiple condenser loop heat pipe presented ...

Roche, Nicholas Albert

2013-01-01T23:59:59.000Z

337

Drift Chamber R&D K.T. McDonald  

E-Print Network (OSTI)

ADC (AD775) Level1 Fifo (IDT7200) Output Fifo (IDT7200) (5X2usc 150 samples) (12usec 180 samples) (15

McDonald, Kirk

338

Drift Chamber R&D K.T. McDonald  

E-Print Network (OSTI)

7200) (5X2usc 150 samples) (12usec 180 samples) (15MHz 8 bits 2Vpp) Write Clock Read Clock Shift Clock

McDonald, Kirk

339

Coke battery with 51-m{sup 3} furnace chambers and lateral supply of mixed gas  

SciTech Connect

The basic approaches employed in the construction of coke battery 11A at OAO Magnitogorskii Metallurgicheskii Kombinat are outlined. This battery includes 51.0-m{sup 3} furnaces and a dust-free coke-supply system designed by Giprokoks with lateral gas supply; it is heated exclusively by low-calorific mixed gas consisting of blast-furnace gas with added coke-oven gas. The 82 furnaces in the coke battery are divided into two blocks of 41. The gross coke output of the battery (6% moisture content) is 1140000 t/yr.

V.I. Rudyka; N.Y. Chebotarev; O.N. Surenskii; V.V. Derevich [Giprokoks, the State Institute for the Design of Coke-Industry Enterprises, Kharkov (Ukraine)

2009-07-15T23:59:59.000Z

340

End station for nanoscale magnetic materials study: Combination of scanning tunneling microscopy and soft X-ray magnetic circular dichroism spectroscopy  

SciTech Connect

We have constructed an end station for nanoscale magnetic materials study at the soft X-ray beamline HiSOR BL-14 at Hiroshima Synchrotron Radiation Center. An ultrahigh-vacuum scanning tunneling microscope (STM) was installed for an in situ characterization of nanoscale magnetic materials in combination with soft X-ray magnetic circular dichroism (XMCD) spectroscopy experiment. The STM was connected to the XMCD experimental station via damper bellows to isolate it from environmental vibrations, thus achieving efficient spatial resolution for observing Si(111) surface at atomic resolution. We performed an in situ experiment with STM and XMCD spectroscopy on Co nanoclusters on an Au(111) surface and explored its practical application to investigate magnetic properties for well-characterized nanoscale magnetic materials.

Ueno, Tetsuro; Sawada, Masahiro; Namatame, Hirofumi [Hiroshima Synchrotron Radiation Center, Hiroshima University, 2-313 Kagamiyama, Higashi-Hiroshima 739-0046 (Japan); Kishimizu, Yusuke; Kimura, Akio [Graduate School of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima 739-8526 (Japan); Taniguchi, Masaki [Hiroshima Synchrotron Radiation Center, Hiroshima University, 2-313 Kagamiyama, Higashi-Hiroshima 739-0046 (Japan); Graduate School of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima 739-8526 (Japan)

2012-12-15T23:59:59.000Z

Note: This page contains sample records for the topic "xmcd chamber 6t" 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

Equilibrium magnetic states in individual hemispherical permalloy caps  

Science Conference Proceedings (OSTI)

The magnetization distributions in individual soft magnetic permalloy caps on non-magnetic spherical particles with sizes ranging from 50 to 800 nm are investigated. We experimentally visualize the magnetic structures at the resolution limit of the x-ray magnetic circular dichroism photoelectron emission microscopy (XMCD-PEEM). By analyzing the so-called tail contrast in XMCD-PEEM, the spatial resolution is significantly enhanced, which allowed us to explore magnetic vortices and their displacement on curved surfaces. Furthermore, cap nanostructures are modeled as extruded hemispheres to determine theoretically the phase diagram of equilibrium magnetic states. The calculated phase diagram agrees well with the experimental observations.

Streubel, Robert; Schmidt, Oliver G. [Institute for Integrative Nanosciences, IFW Dresden, 01069 Dresden (Germany); Material Systems for Nanoelectronics, Chemnitz University of Technology, 09107 Chemnitz (Germany); Kravchuk, Volodymyr P.; Gaididei, Yuri [Bogolyubov Institute for Theoretical Physics, 03143 Kiev (Ukraine); Sheka, Denis D. [Radiophysics Faculty, Taras Shevchenko National University of Kiev, 01601 Kiev (Ukraine); Makarov, Denys [Institute for Integrative Nanosciences, IFW Dresden, 01069 Dresden (Germany); Kronast, Florian [Helmholtz-Zentrum Berlin fuer Materialien und Energie GmbH, 12489 Berlin (Germany)

2012-09-24T23:59:59.000Z

342

Imaging of lateral spin valves with soft x-ray microscopy  

SciTech Connect

We investigated Co/Cu lateral spin valves by means of high-resolution transmission soft x-ray microscopy with magnetic contrast that utilizes x-ray magnetic circular dichroism (XMCD). No magnetic XMCD contrast was observed at the Cu L{sub 3} absorption edge, which should directly image the spin accumulation in Cu. Although electrical transport measurements in a non-local geometry clearly detected the spin accumulation in Cu, which remained unchanged during illumination with circular polarized x-rays at the Co and Cu L{sub 3} absorption edges.

Mosendz, O.; Mihajlovic, G.; Pearson, J. E.; Fischer, P.; Im, M.-Y.; Bader, S. D.; Hoffmann, A.

2009-05-01T23:59:59.000Z

343

Mesoscopic Magnetic/Semiconductor Heterostructures  

Science Conference Proceedings (OSTI)

We report the experimental results of Fe and Fe3O4 nanostructures on GaAs(100) surfaces and hybrid Ferromagnetic/Semiconductor/Ferromagnetic (FM/SC/FM) spintronic devices. Element specific x-ray magnetic circular dichroism (XMCD) ... Keywords: Epitaxial ferromagnetic thin film, ferromagnetic/semiconductor hybrid structures, spintronics

Yong Bing Xu; E. Ahmad; Yong Xiong Lu; J. S. Claydon; Ya Zhai; G. van der Laan

2006-09-01T23:59:59.000Z

344

Main Chamber Plasma-Wall Interaction Studies in DIII-D in Support of ITER (A26895)  

E-Print Network (OSTI)

Proceedings Of 23rd IAEA Fusion Energy Conference, October 11-16, 2010, Daejeon, Republic Of Korea, Http://www-pub.iaea.org/mtcd/meetings/cn180_papers.asp, Paper EXD/P3-3623rd IAEA Fusion Energy Conference Daejeon, KP, 2010999617700

Watkins, J.G.

2010-10-13T23:59:59.000Z

345

Investigation of MAGMA chambers in the Western Great Basin. Final report, 9 June 1982-31 October 1985  

DOE Green Energy (OSTI)

This report summarizes efforts made by the Seismological Laboratory toward the detection and delineation of shallow crustal zones in the western Great Basin, and toward the development of methods to accomplish such detection. The work centers around the recently-active volcanic center near Long Valley, California. The work effort is broken down into three tasks: (1) network operations, (2) data analysis and interpretation, and (3) the study of shallow crustal amomalies (magma bodies). Section (1) describes the efforts made to record thousand of earthquakes near the Long Valley caldera, and focusses on the results obtained for the November 1984 round Valley earthquake. Section (2) describes the major effort of this contract, which was to quantify the large volume of seismic data being recorded as it pertains to the goals of this contract. Efforts described herein include (1) analysis of earthquake focal mechanisms, and (2) the classification, categorization, and interpretation of unusual seismic phases in terms of reflections and refractions from shallow-crustal anomalous zones. Section (3) summarizes the status of our research to date on the locations of magma bodies, with particular emphasis on a location corresponding to the map location of the south end of Hilton Creek fault. Five lines of independent evidence suggest that magma might be associated with this spot. Finally, new evidence on the large magma bodies within the Long Valley caldera, of interest to the DOE deep drilling project, is presented.

Peppin, W.A.

1986-02-10T23:59:59.000Z

346

Comparing nocturnal eddy covariance measurements to estimates of ecosystem respiration made by scaling chamber measurements at six coniferous boreal sites  

E-Print Network (OSTI)

Springer-Verlag, New Manitoba, J. Geophys. Res. , thisin Saskatchewan and Manitoba, Canada, Tree Physiol. , VEMAPjack pine (old) in northern Manitoba and 600, 480, and 310 g

1997-01-01T23:59:59.000Z

347

1 IAEA-CN-94/FT/1-3Ra Addressing Key Science and Technology Issues for IFE Chambers,  

E-Print Network (OSTI)

plant must supply about 500,000 targets per day, including manufacturing the spherical fuel capsule deposition material hohlraum, have been developed (see Fig. 3). Development of additional foam fabrication for 400 MJ targets. We have performed a cost analysis of manufacturing the direct drive target

Najmabadi, Farrokh

348

Heteroepitaxial growth of InAs on GaAs(001) by in situ STM located inside MBE growth chamber  

Science Conference Proceedings (OSTI)

The growth of InAs on GaAs(001) is of great interest primarily due to the self-assembly of arrays of quantum dots (QDs) with excellent opto-electronic properties. However, a basic understanding of their spontaneous formation is lacking. Advanced experimental ... Keywords: GaAs, InAs, Molecular beam epitaxy, Quantum dots, Scanning tunneling microscopy

S. Tsukamoto; G. R. Bell; Y. Arakawa

2006-12-01T23:59:59.000Z

349

Large bore natural gas engine performance improvements and combustion stabilization through reformed natural gas precombustion chamber fueling.  

E-Print Network (OSTI)

??Lean combustion is a standard approach used to reduce NOx emissions in large bore natural gas engines. However, at lean operating points, combustion instabilities and (more)

Ruter, Matthew D.

2010-01-01T23:59:59.000Z

350

The Effects of a Hydrogen Environment on the Lifetime of Small-Diameter Drift Chamber Anode Wires  

DOE Green Energy (OSTI)

Possible deterioration of anode sense wires used in a hydrogen-filled neutron detector is investigated. Wires were loaded with free weights and put into a wire detector environment. Stainless Steel, Tungsten, and Platinum wires did not break after exposure to charge equivalent to many wire lifetimes. Furthermore, exposure to hydrogen gas caused no noticeable surface degradation or change in wire yield strength.

King, J; Smith, T; Kunkle, J; Castelaz, J; Thomson, S; Burstein, Z; Bernstein, A; Rosenberg, L; Hefner, M

2005-04-29T23:59:59.000Z

351

Structured, unstructured, and semistructured search in semistructured databases  

E-Print Network (OSTI)

= {{ Address }} Address [id = 6] T ( All ) = {{ Zip ,Street }, { Zip , POBox } } T ( Zip ) = {{ Zip }} T ( Choice ) = {{ Street }, {

Balmin, Andrey

2006-01-01T23:59:59.000Z

352

ALSNews Vol. 318  

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

8 Print 8 Print Probing Strain-Induced Changes in Electronic Structure with XMCD The difference in the lattice constant of a substrate compared to a thin film deposited on top of it or a matrix compared to a nanocolumn embedded in it induces a lattice distortion-i.e., strain-in the nanostructure as compared to the bulk. The strong coupling of electronic properties with structural parameters in transition-metal oxides then allows tuning and ultimately controlling the physical characteristics of nanoarchitectures through strain. A research team from the UK and Berkeley has now demonstrated that soft x-ray magnetic circular dichroism (XMCD) techniques are uniquely suited to provide detailed information about the impact of strain on the electronic properties of magnetic oxide nanoarchitectures. Read more...

353

ALSNews Vol. 318  

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

8 Print 8 Print Probing Strain-Induced Changes in Electronic Structure with XMCD The difference in the lattice constant of a substrate compared to a thin film deposited on top of it or a matrix compared to a nanocolumn embedded in it induces a lattice distortion-i.e., strain-in the nanostructure as compared to the bulk. The strong coupling of electronic properties with structural parameters in transition-metal oxides then allows tuning and ultimately controlling the physical characteristics of nanoarchitectures through strain. A research team from the UK and Berkeley has now demonstrated that soft x-ray magnetic circular dichroism (XMCD) techniques are uniquely suited to provide detailed information about the impact of strain on the electronic properties of magnetic oxide nanoarchitectures. Read more...

354

ALSNews Vol. 318  

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

8 Print 8 Print Probing Strain-Induced Changes in Electronic Structure with XMCD The difference in the lattice constant of a substrate compared to a thin film deposited on top of it or a matrix compared to a nanocolumn embedded in it induces a lattice distortion-i.e., strain-in the nanostructure as compared to the bulk. The strong coupling of electronic properties with structural parameters in transition-metal oxides then allows tuning and ultimately controlling the physical characteristics of nanoarchitectures through strain. A research team from the UK and Berkeley has now demonstrated that soft x-ray magnetic circular dichroism (XMCD) techniques are uniquely suited to provide detailed information about the impact of strain on the electronic properties of magnetic oxide nanoarchitectures. Read more...

355

Determination of the Fe magnetic anisotropies and the CoO frozen spins in epitaxial CoO/Fe/Ag(001)  

SciTech Connect

CoO/Fe/Ag(001) films were grown epitaxially and studied by X-ray Magnetic Circular Dichroism (XMCD) and X-ray Magnetic Linear Dichroism (XMLD). After field cooling along the Fe[100] axis to 80 K, exchange bias, uniaxial anisotropy, and 4-fold anisotropy of the films were determined by hysteresis loop and XMCD measurements by rotating the Fe magnetization within the film plane. The CoO frozen spins were determined by XMLD measurement as a function of CoO thickness.We find that among the exchange bias, uniaxial anisotropy, and 4-fold anisotropy, only the uniaxial magnetic anisotropy follows thickness dependence of the CoO frozen spins.

Meng, J. Li, Y.; Park, J. S.; Jenkins, C. A.; Arenholz, E.; Scholl, A.; Tan, A.; Son, H.; Zhao, H. W.; Hwang, Chanyong; Qiu, Z. Q.

2011-04-28T23:59:59.000Z

356

PII: S0304-8853(99)00407-2  

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

Tel.: Tel.: #001-408-927-2461; fax: #001-408-927-2100. E-mail address: stohr@almaden.ibm.com (J. Sto K hr) Journal of Magnetism and Magnetic Materials 200 (1999) 470}497 Exploring the microscopic origin of magnetic anisotropies with X-ray magnetic circular dichroism (XMCD) spectroscopy J. Sto K hr* IBM Research Division, Almaden Research Center, 650 Harry Road, San Jose, CA 95120-6099, USA Received 11 February 1999; received in revised form 13 April 1999 Abstract Symmetry breaking and bonding at interfaces leads to a variety of anisotropy phenomena in transition metal sandwiches and multilayers. The charge density, the spin density and the orbital moment become anisotropic. These e!ects can be studied by the X-ray magnetic circular dichroism (XMCD) technique which senses the local anisotropy of charge, spin and angular momentum around an atom that is excited by the absorption

357

ALSNews Vol. 318  

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

8 Print 8 Print Probing Strain-Induced Changes in Electronic Structure with XMCD The difference in the lattice constant of a substrate compared to a thin film deposited on top of it or a matrix compared to a nanocolumn embedded in it induces a lattice distortion-i.e., strain-in the nanostructure as compared to the bulk. The strong coupling of electronic properties with structural parameters in transition-metal oxides then allows tuning and ultimately controlling the physical characteristics of nanoarchitectures through strain. A research team from the UK and Berkeley has now demonstrated that soft x-ray magnetic circular dichroism (XMCD) techniques are uniquely suited to provide detailed information about the impact of strain on the electronic properties of magnetic oxide nanoarchitectures. Read more...

358

ALSNews Vol. 318  

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

8 Print 8 Print Probing Strain-Induced Changes in Electronic Structure with XMCD The difference in the lattice constant of a substrate compared to a thin film deposited on top of it or a matrix compared to a nanocolumn embedded in it induces a lattice distortion-i.e., strain-in the nanostructure as compared to the bulk. The strong coupling of electronic properties with structural parameters in transition-metal oxides then allows tuning and ultimately controlling the physical characteristics of nanoarchitectures through strain. A research team from the UK and Berkeley has now demonstrated that soft x-ray magnetic circular dichroism (XMCD) techniques are uniquely suited to provide detailed information about the impact of strain on the electronic properties of magnetic oxide nanoarchitectures. Read more...

359

ALSNews Vol. 318  

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

8 Print 8 Print Probing Strain-Induced Changes in Electronic Structure with XMCD The difference in the lattice constant of a substrate compared to a thin film deposited on top of it or a matrix compared to a nanocolumn embedded in it induces a lattice distortion-i.e., strain-in the nanostructure as compared to the bulk. The strong coupling of electronic properties with structural parameters in transition-metal oxides then allows tuning and ultimately controlling the physical characteristics of nanoarchitectures through strain. A research team from the UK and Berkeley has now demonstrated that soft x-ray magnetic circular dichroism (XMCD) techniques are uniquely suited to provide detailed information about the impact of strain on the electronic properties of magnetic oxide nanoarchitectures. Read more...

360

X-ray magnetic circular dichroism of ferromagnetic Co{sub 4}N epitaxial films on SrTiO{sub 3}(001) substrates grown by molecular beam epitaxy  

Science Conference Proceedings (OSTI)

5-nm thick Co{sub 4}N layers capped with 3-nm thick Au layers were grown epitaxially on SrTiO{sub 3}(001) substrates by molecular beam epitaxy using solid Co and a radio-frequency NH{sub 3} plasma. Spin and orbital magnetic moments of the Co{sub 4}N layers were estimated using x-ray magnetic circular dichroism (XMCD) measurements at 300 K. The site-averaged Co 3d spin magnetic moment is evaluated to be about 1.4 {mu}{sub B}, which is smaller than that predicted theoretically (1.58 {mu}{sub B}). The element-specific XMCD intensities for the Co L{sub 3} edge and N K edge show that the magnetic moment is induced at the N atoms.

Ito, Keita; Harada, Kazunori; Toko, Kaoru; Suemasu, Takashi [Institute of Applied Physics, University of Tsukuba, Ibaraki 305-8573 (Japan); Ye, Mao; Kimura, Akio [Graduate School of Science, Hiroshima University, Hiroshima 739-8526 (Japan); Takeda, Yukiharu; Saitoh, Yuji [Japan Atomic Energy Agency (JAEA), SPring-8, Hyogo 679-5198 (Japan); Akinaga, Hiro [National Institute of Advanced Industrial Science and Technology (AIST), Ibaraki 305-8569 (Japan)

2011-12-19T23:59:59.000Z

Note: This page contains sample records for the topic "xmcd chamber 6t" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

Disentangling the Mn moments on different sublattices in the half-metallic ferrimagnet Mn3?xCoxGa  

SciTech Connect

Ferrimagnetic Mn{sub 3-x}Co{sub x}Ga compounds have been investigated by magnetic circular dichroism in x-ray absorption (XMCD). Compounds with x > 0.5 crystallize in the CuHg{sub 2}Ti structure. A tetragonal distortion of the cubic structure occurs for x {le} 0.5. For the cubic phase, magnetometry reveals a linearly increasing magnetization of 2x Bohr magnetons per formula unit obeying the generalized Slater-Pauling rule. XMCD confirms the ferrimagnetic character with Mn atoms occupying two different sublattices with antiparallel spin orientation and different degrees of spin localization and identifies the region 0.6 < x {le} 0.8 as most promising for a high spin polarization at the Fermi level. Individual Mn moments on inequivalent sites are compared to theoretical predictions.

Klaer, P.; Jenkins, C.A.; Alijani, V.; Winterlik, J.; Balke, B.; Felser, C.; Elmers, H.J.

2011-05-03T23:59:59.000Z

362

Wall Correction Factors Estimated by Monte Carlo Calculation for Spherical Graphite-Walled Cavity Chambers in INER's 60Co Air-Kerma Standard  

Science Conference Proceedings (OSTI)

Detectors / Special Issue on the 11th International Conference on Radiation Shielding and the 15th Topical Meeting of the Radiation Protection and Shielding Division (Part 1) / Radiation Measurements and Instrumentation

Yi-Chun Lin; Shi-Hwa Su; Hui-Yu Tsai; Shiang-Huei Jiang

363

Rapid pH and PO2 changes in the tissue recording chamber during stoppage of a gas-equilibrated perfusate: effects on  

E-Print Network (OSTI)

V. The sustained high-voltage-activated (HVAS) current was defined as the current remaining at the end of a 150-ms calcium current are identified (HVAS, sustained high-voltage-activated; LVA, low-voltage-activated; HVAT

Manitoba, University of

364

Simulation of the Charge Produced by Protons Inside a Tissue Equivalent Ionization Chamber in a Mixed Neutron/Gamma Field in BNCT  

Science Conference Proceedings (OSTI)

Detectors / Special Issue on the 11th International Conference on Radiation Shielding and the 15th Topical Meeting of the Radiation Protection and Shielding Division (Part 1) / Radiation Protection

Antoaneta Roca; Yuan-Hao Liu; Ray Moss; Finn Stecher-Rasmussen; Sander Nievaart

365

Design, construction and testing of a high-vacuum anneal chamber for in-situ crystallisation of silicon thin-film solar cells.  

E-Print Network (OSTI)

??Thin-film solar cells on glass substrates are likely to have a bright future due to the potentially low costs and the short energy payback times. (more)

Weber, Jrgen Wolfgang

2006-01-01T23:59:59.000Z

366

Evacuated optical structure comprising optical bench mounted to sidewall of vacuum chamber in a manner which inhibits deflection and rotation of the optical bench  

DOE Patents (OSTI)

An improved evacuated optical structure is disclosed comprising an optical bench mounted in a vacuum vessel in a manner which inhibits transmission of movement of the vacuum vessel to the optical bench, yet provides a compact and economical structure. The vacuum vessel is mounted, through a sidewall thereof, to a support wall at four symmetrically positioned and spaced apart areas, each of which comprises a symmetrically positioned group of mounting structures passing through the sidewall of the vacuum vessel. The optical bench is pivotally secured to the vacuum vessel by four symmetrically spaced apart bolts and spherical bearings, each of which is centrally positioned within one of the four symmetrically positioned groups of vacuum vessel mounting structures. Cover plates and o-ring seals are further provided to seal the vacuum vessel mounting structures from the interior of the vacuum vessel, and venting bores are provided to vent trapped gases in the bores used to secure the cover plates and o-rings to the vacuum vessel. Provision for detecting leaks in the mounting structures from the rear surface of the vacuum vessel sidewall facing the support wall are also provided. Deflection to the optical bench within the vacuum vessel is further minimized by tuning the structure for a resonant frequency of at least 100 Hertz. 10 figures.

Bowers, J.M.

1994-04-19T23:59:59.000Z

367

After the First Trial: A Population-Based Survey on Knowledge and Perception of Justice and the Extraordinary Chambers in the Courts of Cambodia  

E-Print Network (OSTI)

with the questionnaire, interview techniques, including non-improve weaknesses in interview techniques. In the field,

Vinck, Patrick; Pham, Phuong N; Balthazard, Mychelle; Hean, Sokhom

2011-01-01T23:59:59.000Z

368

Combustion of EDS mid-distillate and refined shale-oil residual fuel in a gas turbine with large single-combustion chamber  

DOE Green Energy (OSTI)

The test fuels included a coal derived mid distillate recycle liquid from the EDS coal liquefaction process, produced by Exxon, and a hydroprocessed residual Paraho shale oil fraction originating from a US Government sponsored program. A BBC (Brown Boveri Co.) type 9 fully equipped 35 MW capacity gas turbine, located at BBC's test facilities near Basel, Switzerland, was utilized. The objective of the combustion test was to establish whether these alternate fuels can be fired in large single combustor turbines without deleterious effects to the turbine or environment. Nitrogen in the shale oil was on the order of 0.4 wt% while the EDS distillate contained slightly less than 10 wt% hydrogen. The test program entailed the firing of 600 barrels of each test fuel at varying turbine loads and a comparison of the results with those from a base case petroleum diesel fuel. Fuel bound nitrogen was not found to contribute significantly to NO/sub x/ emissions in contrast to other work reported earlier in subscale gas turbine tests. Water injection at 0.6 to 0.7 water-fo-fuel mass ratios was effective in meeting EPA requirements for NO/sub x/ emissions from the diesel, shale and coal derived fuels at full turbine load. Low fuel hydrogen content did not cause any operational or emission problems. Combustor wall temperature, the major problem with low hydrogen fuels, rose only slightly within acceptable limits.

Not Available

1983-01-01T23:59:59.000Z

369

First Characterization of the Ultra-Shielded Chamber in the Low-noise Underground Laboratory (LSBB) of Rustrel Pays d'Apt  

E-Print Network (OSTI)

In compliance with international agreements on nuclear weapons limitation, the French ground-based nuclear arsenal has been decommissioned in its totality. One of its former underground missile control centers, located in Rustrel, 60 km east of Avignon (Provence) has been converted into the ``Laboratoire Souterrain \\`a Bas Bruit de Rustrel-Pays d'Apt'' (LSBB). The deepest experimental hall (500 m of calcite rock overburden) includes a 100 m$^{2}$ area of sturdy flooring suspended by and resting on shock absorbers, entirely enclosed in a 28 m-long, 8 m-diameter, 1 cm-thick steel Faraday cage. This results in an unparalleled combination of shielding against cosmic rays, acoustic, seismic and electromagnetic noise, which can be exploited for rare event searches using ultra low-temperature and superconducting detectors. The first characterization measurements in this unique civilian site are reported. For more info see http://home.cern.ch/collar/RUSTREL/rustrel.html

G. Waysand; D. Bloyet; J. P. Bongiraud; J. I. Collar; C. Dolabdjian; Ph. Le Thiec

1999-10-11T23:59:59.000Z

370

First Characterization of the Ultra-Shielded Chamber in the Low-noise Underground Laboratory (LSBB) of Rustrel Pays d'Apt  

E-Print Network (OSTI)

In compliance with international agreements on nuclear weapons limitation, the French ground-based nuclear arsenal has been decommissioned in its totality. One of its former underground missile control centers, located in Rustrel, 60 km east of Avignon (Provence) has been converted into the ``Laboratoire Souterrain Bas Bruit de Rustrel-Pays d'Apt'' (LSBB). The deepest experimental hall (500 m of calcite rock overburden) includes a 100 m$^{2}$ area of sturdy flooring suspended by and resting on shock absorbers, entirely enclosed in a 28 m-long, 8 m-diameter, 1 cm-thick steel Faraday cage. This results in an unparalleled combination of shielding against cosmic rays, acoustic, seismic and electromagnetic noise, which can be exploited for rare event searches using ultra low-temperature and superconducting detectors. The first characterization measurements in this unique civilian site are reported. http://www.gps.jussieu.fr/RUSTREL/rustrel.html

Waysand, G; Bongiraud, J P; Collar, J I; Dolabdjian, C; Le Thiec, P; Thiec, Ph. Le

2000-01-01T23:59:59.000Z

371

Low energy tracking and particles identification in the MUNU Time Projection Chamber at 1 bar. Possible application in low energy solar neutrino spectroscopy  

E-Print Network (OSTI)

In this paper we present the results from the measurements made with the MUNU TPC at 1bar pressure of CF4 in the energy region below 1 MeV. Electron events down to 80 keV are successfully measured. The electron energy and direction are reconstructed for every contained single electron above 200 keV. As test the 137Cs photopeak is reconstructed by measuring both the energy and direction of the Compton electrons in the TPC.

Z. Daraktchieva; C. Amsler; M. Avenier; C. Broggini; J. Busto; C. Cerna; F. Juget; D. H. Koang; J. Lamblin; D. Lebrun; O. Link; G. Puglierin; A. Stutz; A. Tadsen; J. -L. Vuilleumier; J. -M. Vuilleumier; V. Zacek

2007-10-04T23:59:59.000Z

372

Complete fabrication of target experimental chamber and implement initial target diagnostics to be used for the first target experiments in NDCX-1  

E-Print Network (OSTI)

in mind. For a W D M user facility the goal is to have afor any future WDM user facility in the HLFS-VNL. DI PULE 6.1. Especially for a user facility a robotic target handling

Bieniosek, F.M.

2008-01-01T23:59:59.000Z

373

Ion-driver fast ignition: Reducing heavy-ion fusion driver energy and cost, simplifying chamber design, target fab, tritium fueling and power conversion  

E-Print Network (OSTI)

pilot-plant case. For a given molten-salt jet velocity, theof With a Flibe molten salt blanket energy multiplier Ptha potassium-containing molten salt, has just enough mass to

1998-01-01T23:59:59.000Z

374

So We Will Never Forget: A Population-Based Survey On Attitudes About Social Reconstruction and the Extraordinary Chambers in the Courts of Cambodia  

E-Print Network (OSTI)

Khmer Rouge regime. TABLE 4: TRUTH SEEKING It is necessarytell the truth (5%), or apologize (3%). TABLE 9: ATTITUDE

Pham, Phuong N; Vinck, Patrick; Hean, Sokhom; Stover, Eric

2009-01-01T23:59:59.000Z

375

Infrared Hole Burning and Conformational Change in a Borane-Ammonia Complex Christopher A. Endicott, Herbert L. Strauss,* Chambers C. Hughes, and Dirk Trauner  

E-Print Network (OSTI)

Infrared Hole Burning and Conformational Change in a Borane-Ammonia Complex Christopher A. Endicott)-borane containing one D atom has been examined. The N-D bands have been hole burned, and the resulting spectra hole burning on the N-D bands of a MOM complex in which the NH3 had been monosubstituted

Trauner, Dirk

376

Heat exchanger  

DOE Patents (OSTI)

A heat exchanger is provided having first and second fluid chambers for passing primary and secondary fluids. The chambers are spaced apart and have heat pipes extending from inside one chamber to inside the other chamber. A third chamber is provided for passing a purge fluid, and the heat pipe portion between the first and second chambers lies within the third chamber.

Daman, Ernest L. (Westfield, NJ); McCallister, Robert A. (Mountain Lakes, NJ)

1979-01-01T23:59:59.000Z

377

The Search for Dark Matter in XENON100 using a Two-Dimensional Profile Likelihood Analysis  

E-Print Network (OSTI)

Time Projection Chamber . . . . . . . . . . . . . . . .detectors are also time projection chambers (TPC) allowingin a two-phase xenon time projection chamber (TPC) through

Lung, Kevin J.

2013-01-01T23:59:59.000Z

378

Genomic insights into the pathogenesis of Leptospira  

E-Print Network (OSTI)

Leptospira inadai" serovar lyme) isolated from human skin."fainei BUT6 T and L. inadai Lyme T as described previously (fainei BUT6 T and L. inadai Lyme T as well as L. interrogans

Ricaldi Camahuali, Jessica Nancy

2009-01-01T23:59:59.000Z

379

Molecular chains and carpets of sexithiophenes on Au,,111... H. Glowatzki,1 S. Duhm,1 K.-F. Braun,2 J. P. Rabe,1 and N. Koch1,  

E-Print Network (OSTI)

Molecular chains and carpets of sexithiophenes on Au,,111... H. Glowatzki,1 S. Duhm,1 K.-F. Braun,2 organic molecular materials -sexithiophene 6T and , -dihexylsexithiophene DH6T adsorbed on Au 111 herringbone reconstruction. At low coverage, 6T forms continuous chains of single-molecular width along Au

Peters, Achim

380

HETERONUCLEAR DIPOLAR COUPLINGS, TOTAL SPIN COHERENCE, AND BILINEAR ROTATIONS IN NMR SPECTROSCOPY  

E-Print Network (OSTI)

on-resonance. Experiments were run with 6t = 100 usec, 6t 1b= 96 usec. The slope 1a of the least-squares fit to thewere run with 6t a = 100 usec, l = 96 usec. The slope of the

Garbow, J.R.

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "xmcd chamber 6t" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

OSTI, US Dept of Energy, Office of Scientific and Technical Informatio...  

Office of Scientific and Technical Information (OSTI)

chamber". Related Topics: Charpak, DOE Research & Development (R&D) Accomplishments, electron transfer reactions, Lederman, Marcus, multiwire chamber, particle detectors...

382

Dry low NOx combustion system with pre-mixed direct-injection secondary fuel nozzle  

Science Conference Proceedings (OSTI)

A combustion system includes a first combustion chamber and a second combustion chamber. The second combustion chamber is positioned downstream of the first combustion chamber. The combustion system also includes a pre-mixed, direct-injection secondary fuel nozzle. The pre-mixed, direct-injection secondary fuel nozzle extends through the first combustion chamber into the second combustion chamber.

Zuo, Baifang; Johnson, Thomas; Ziminsky, Willy; Khan, Abdul

2013-12-17T23:59:59.000Z

383

Development and validation of compressible mixture viscous fluid algorithm applied to predict the evolution of inertial fusion energy chamber gas and the impact of gas on direct-drive target survival  

E-Print Network (OSTI)

Symp. on Rarefied Gas Dyn. [51] R. Martin and F. Najmabadi.Direct Simulation, R. Martin and F. Najmabadi, To AppearFluid Dynamics, R. Martin, University of California Mas-

Martin, Robert Scott

2011-01-01T23:59:59.000Z

384

Development and validation of compressible mixture viscous fluid algorithm applied to predict the evolution of inertial fusion energy chamber gas and the impact of gas on direct-drive target survival  

E-Print Network (OSTI)

conversion be- tween kinetic (green) and thermal energy (energy lost through ra- diation (red), kinetic (green), andenergy lost through radiation (red), kinetic (green), and

Martin, Robert Scott

2011-01-01T23:59:59.000Z

385

Development and validation of compressible mixture viscous fluid algorithm applied to predict the evolution of inertial fusion energy chamber gas and the impact of gas on direct-drive target survival  

E-Print Network (OSTI)

4. Convergence of Heat Fluxes with Grid Refinement . . 5.III.A.4 Convergence of Heat Fluxes with Grid Refinement Onedecrease of integrated heat flux with grid refinement rather

Martin, Robert Scott

2011-01-01T23:59:59.000Z

386

Development and validation of compressible mixture viscous fluid algorithm applied to predict the evolution of inertial fusion energy chamber gas and the impact of gas on direct-drive target survival  

E-Print Network (OSTI)

green) and thermal energy (gray) . . . . . . . . . . .is the temperature of the thermal energy of the system at abe exchanged with the thermal energy and dissipated through

Martin, Robert Scott

2011-01-01T23:59:59.000Z

387

A PORTABLE DOSE RATE INSTRUMENT FOR MEASUREMENT OF NATURAL BACK-GROUND RADIATION LEVELS  

SciTech Connect

An instrument of the ionization chamber type which is capable of measuring radiation dose rates down to and below those encountered in natural background was designed and constructed. It consists of a 40-liter ionization chamber coupled to a portable battery-powered electrometer. The chamber polarizing battery is a part of the chamber center electrode assembly and is located inside the chamber. (auth)

Rising, F.L.

1960-12-19T23:59:59.000Z

388

The social impact in a high-risk community - CECM - Simon Fraser ...  

E-Print Network (OSTI)

Washington, DC, 1986. [6] T. Budd, P. Collier, B. Mhlanga, Levels of Self-report Offending and Drug Use. Among Offenders: Findings from the Criminality...

389

Heat Pump Water Heaters | Department of Energy  

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

with a small chamber on top and a larger one on the bottom. In the top chamber are a fan, a cylindrical compressor, and an evaporator that runs along the inside of the chamber....

390

Gas laser with dual plasma mixing  

DOE Patents (OSTI)

A gas laser includes an enclosure forming a first chamber, a second chamber and a lasing chamber which communicates through a first opening to the first chamber and through a second opening to the second chamber. The lasing chamber has a pair of reflectors defining a Fabry-Perot cavity. Separate inlets enable different gases to be introduced into the first and second chambers. A first cathode within the first chamber is provided to produce positive ions which travel into the lasing chamber and a second cathode of a pin-hollow type within the second chamber is provided to produce negative ions which travel into the lasing chamber. A third inlet introduces a molecular gas into the lasing chamber, where the molecular gas becomes excited by the positive and negative ions and emits light which lases in the Fabry-Perot cavity.

Pinnaduwage, Lal A. (Knoxville, TN)

1999-01-01T23:59:59.000Z

391

A High Performance Pneumatic Force Actuator System Part 1 - Nonlinear Mathematical Model  

E-Print Network (OSTI)

In this pap er we developed a detailed mathematical model of dual action pneumatic actuator contr16 with pr2 or2520 spool valves. E#ects of nonlinear flowthr35 the valve,air compr6T430035 y incylinder chamber2 leakage between chamber6 end of str1 e inactive volume, and time delay and attenuation in the pneumatic lines wercar14T4 consider6 System identification, numer4T simulation and model validation experT11 ts wer conducted for two types of air cylinder and di#er4 t connecting tubes length, showing ver goodagr552T t. This mathematical model will be used in the development of high per35T423 nonlinear for3 contr330T with applications in teleopereopT1 haptic inter164T and rT otics. 1 Introducti Mode) forceIP(k)fiXe tek## e ration, haptic inte#kP9kX andothe applications in robotics recsX( high pefifiP6XIP# force actuators, with highforce output pe r unit wefi9 t. It is also important to have line96 fast andaccurate reu onse as we# as low friction and me hanical impe dance Traditional gekk9 e lek9#6XI motors can not provide the characteP#BfiBXe Fe w ne## de#(#XI motors may have spek)fi dire)XIB(# e actuators, with no intefi)BB9XI # This ar116 has appear in the September 2000 issue of ASME Jour3 of Dynamic Systems Measur2 ment and ContrT1 Vol. 122, No.3, pp. 416-425 1 me hanisms. YeP applications such astek9( ek9(P maste arms with gravitational compe nsation, rePPfi# long duration, static highforce output. In the6 caseB direB drive e levXfi)(6 actuators nekBB6XI9k speXPB cooling syste) todissipate the e xceipa e hei We be lie e thatpneXP96# cylinde# can o#e a be tte alte9BkXI e toefik)6(XI9 or hydraulic actuators forceXP#B type s of applications. PneP966X actuators provide the preBfifi)XI e umeBfifi) qualitie at low cost. The are alsosuitable forcle# e nvironme ts ands...

Edmond Richer; Yildirim Hurmuzlu

2001-01-01T23:59:59.000Z

392

When Her Thousand Chimneys Smoked: Virginia's Enslaved Cooks and Their Kitchens  

E-Print Network (OSTI)

Chambers, Murder at Montpelier: Igbo African in Virginia (Douglas B. Murder at Montpelier: Igbo African in Virginia, (Chambers. Murder at Montpelier: Igbo African in Virginia, (

Deetz, Kelley

2010-01-01T23:59:59.000Z

393

LANL: CPO: Los Alamos National Laboratory Impacts and Investments...  

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

LLC were recognized at the Espanola Chamber of Commerce's annual State of the Chamber Banquet as the organization's "Supporter of the Year" for 2012. LANL: CPO: Los Alamos...

394

Analysis of the Current Signature in a Constant-Volume Combustion...  

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

Analysis of the Current Signature in a Constant-Volume Combustion Chamber Title Analysis of the Current Signature in a Constant-Volume Combustion Chamber Publication Type Journal...

395

Instruments  

Science Conference Proceedings (OSTI)

Instruments. A, B, C, D, E, F, G, H. 1, Time (s), T (deg C), Rel Humidity (%), Ion chamber 1 (volts), Ion chamber 2 (volts), Mass conc. ...

2012-01-10T23:59:59.000Z

396

eCopy, Inc.  

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

was mounted as presently planned for the final installation. This afforded an early testing of chamber positional stability after bakeout cycling. Tests of chamber...

397

Leon's Picture Library  

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

Leon's Picture Library Leon's Life - Leon's Picture Library - Leon's Other Page Toddler Teenager College Student Leon's Bubble Chamber Spark Chamber Nobel Prize Friends of Fermilab...

398

Optical Characterization Laboratory (Fact Sheet), NREL (National...  

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

Laboratory Equipment * VSHOT (Video Scanning Hartman Optical Tester) * SOFAST (Sandia Optical Fringe Analysis Slope Tool) * Weather Chamber * Large Thermal Cycling Chamber (future...

399

Optics for Next Generation Synchrotron Sources  

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

synchrotron equipment including; High Precision Slits, Optical Tables, Lead Shielded Beam Pipes, Micro Ion Chambers, Split Two Axis Ion Chambers, Mirror Systems, Monochromators,...

400

NETL: Methane Hydrates - DOE/NETL Projects - Natural Gas Hydrates...  

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

Fire in the Ice articles; October 2012 and October 2013). PCCT devices include a manipulator for moving pressure cores from storage chambers into various testing chambers,...

Note: This page contains sample records for the topic "xmcd chamber 6t" 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

Recirculating Molten Metal Supply System And Method  

DOE Patents (OSTI)

The melter furnace includes a heating chamber (16), a pump chamber (18), a degassing chamber (20), and a filter chamber (22). The pump chamber (18) is located adjacent the heating chamber (16) and houses a molten metal pump (30). The degassing chamber (20) is located adjacent and in fluid communication with the pump chamber (18), and houses a degassing mechanism (36). The filter chamber (22) is located adjacent and in fluid communication with the degassing chamber (20). The filter chamber (22) includes a molten metal filter (38). The melter furnace (12) is used to supply molten metal to an externally located holder furnace (14), which then recirculates molten metal back to the melter furnace (12).

Kinosz, Michael J. (Apollo, PA); Meyer, Thomas N. (Murrysville, PA)

2003-07-01T23:59:59.000Z

402

Apparatus for distilling shale oil from oil shale  

Science Conference Proceedings (OSTI)

An apparatus for distilling shale oil from oil shale comprises: a vertical type distilling furnace which is divided by two vertical partitions each provided with a plurality of vent apertures into an oil shale treating chamber and two gas chambers, said oil shale treating chamber being located between said two gas chambers in said vertical type distilling furnace, said vertical type distilling furnace being further divided by at least one horizontal partition into an oil shale distilling chamber in the lower part thereof and at least one oil shale preheating chamber in the upper part thereof, said oil shale distilling chamber and said oil shale preheating chamber communication with each other through a gap provided at an end of said horizontal partition, an oil shale supplied continuously from an oil shale supply port provided in said oil shale treating chamber at the top thereof into said oil shale treating chamber continuously moving from the oil shale preheating chamber to the oil shale distilling chamber, a high-temperature gas blown into an oil shale distilling chamber passing horizontally through said oil shale in said oil shale treating chamber, thereby said oil shale is preheated in said oil shale preheating chamber, and a gaseous shale oil is distilled from said preheated oil shale in said oil shale distilling chamber; and a separator for separating by liquefaction a gaseous shale oil from a gas containing the gaseous shale oil discharged from the oil shale preheating chamber.

Shishido, T.; Sato, Y.

1984-02-14T23:59:59.000Z

403

Dopant Site Determination in Iron Oxide Nanoparticles Utilizing X-ray  

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

Dopant Site Determination in Iron Oxide Nanoparticles Utilizing X-ray Dopant Site Determination in Iron Oxide Nanoparticles Utilizing X-ray Absorption Techniques Monday, September 9, 2013 - 11:00am SLAC, Conference Room 137-322 Presented by Dr. Vanessa Pool The dopant behavior of spinels has been investigated for over half a century and yet new insight into this class of materials is still being made today. In this work, the question of dopant site preference is explored for the nanoparticle regime. Iron oxide nanoparticles have numerous exciting applications. To realize these applications, controlling the preferred dopant site and valence within the host material is important. X-ray Absorption Spectroscopy (XAS) and X-ray Magnetic Circular Dichroism (XMCD) are element specific techniques with magnetic contrast that give insights into the material composition. Using both

404

Exploring nanomagnetism with soft x-ray microscopy  

SciTech Connect

Magnetic soft X-ray microscopy images magnetism in nanoscale systems with a spatial resolution down to 15nm provided by state-of-the-art Fresnel zone plate optics. X-ray magnetic circular dichroism (X-MCD) is used as element-specific magnetic contrast mechanism similar to photoemission electron microscopy (PEEM), however, with volume sensitivity and the ability to record the images in varying applied magnetic fields which allows to study magnetization reversal processes at fundamental length scales. Utilizing a stroboscopic pump-probe scheme one can investigate fast spin dynamics with a time resolution down to 70 ps which gives access to precessional and relaxation phenomena as well as spin torque driven domain wall dynamics in nanoscale systems. Current developments in zone plate optics aim for a spatial resolution towards 10nm and at next generation X-ray sources a time resolution in the fsec regime can be envisioned.

Fischer, P.; Kim, D.-H.; Mesler, B.L.; Chao, W.; Sakdinawat,A.E.; Anderson, E.H.

2006-10-30T23:59:59.000Z

405

X-ray absorption and magnetic circular dichroism studies of Co2FeAl in magnetic tunnel junctions  

SciTech Connect

The bulk magnetic moment and the element specific magnetic moment of Co{sub 2}FeAl thin films were examined as a function of annealing temperature by alternating gradient magnetometer (AGM) and X-ray absorption spectroscopy (XAS)/X-ray magnetic circular dichroism (XMCD), respectively. A high magnetic moment can be achieved for all annealing temperatures and the predicted bulk and interface magnetic moment of about 5 {tilde A}{sub B} are reached via heating. We will also present tunnel magnetoresistance (TMR) values of up to 153% at room temperature and 260% at 13 K for MgO based magnetic tunnel junctions (MTJs) with Co{sub 2}FeAl and Co-Fe electrodes.

Ebke, D.; Kugler, Z.; Thomas, P.; Schebaum, O.; Schafers, M.; Nissen, D.; Schmalhorst, J.; Hutten, A.; Arenholz, E.; Thomas, A.

2010-01-11T23:59:59.000Z

406

Determination of rotatable and frozen CoO spins and their relationship to exchange bias in CoO/Fe/Ag(001)  

SciTech Connect

The exchange bias of epitaxially grown CoO/Fe/Ag(001) was investigated using X-ray Magnetic Circular Dichroism (XMCD) and X-ray Magnetic Linear Dichroism (XMLD) techniques. A direct XMLD measurement on the CoO layer during the Fe magnetization reversal shows that the CoO compensated spins are rotatable at thinner thickness and frozen, i.e. fixed in direction to the lattice, at larger thickness. By a quantitative determination of the rotatable and frozen CoO spins as a function of the CoO film thickness, we find the remarkable result that the exchange bias is well established before frozen spins are detectable in the CoO film, contrary to the common assumption that the majority of antiferromagnetic spins need to be frozen to generate the exchange bias. We further show that the rotatable/frozen CoO spins are uniformly distributed in the CoO film.

Wu, J.; Park, J.; Kim, W.; Arenholz, E.; Liberati, M.; Scholl, A.; Wu, Y.; Hwang, C.; Qiu, Z.

2010-02-10T23:59:59.000Z

407

Dynamic Switching of the Spin Circulation in Tapered Magnetic Nanodisks  

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

Dynamic Switching of the Spin Dynamic Switching of the Spin Circulation in Tapered Magnetic Nanodisks Dynamic Switching of the Spin Circulation in Tapered Magnetic Nanodisks Print Monday, 22 April 2013 12:09 fischer-magnetic vortices Ferromagnetic NiFe disks (500-nm-wide and 20-nm-thick), were fabricated by e-beam lithography onto a waveguide structure. Field pulses, generated by launching current pulses into the waveguide trigger the magnetization dynamics in the elements. Using the soft x-ray microscope XM-1 providing 25-nm spatial resolution, circularly polarized soft x-rays give rise to XMCD contrast which allows to record an image of the in-plane circulation of the magnetic vortex. The topology of vortices-areas where there is a spinning motion around an imaginary axis-is a physical phenomenon which is found across a large

408

APS Beamline 6-ID-D  

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

MM-Group Home MM-Group Home MMG Advisory Committees 6-ID-D Home Recent Publications Beamline Info Optics Instrumentation Software User Info Beamline 6-ID-D Beamline 6-ID-D is operated by the Magnetic Materials Group in the X-ray Science Division (XSD) of the Advanced Photon Source. This is a high energy (50 - 130 keV) beamline used for structural studies primarily on single crystal materials. Recent Research Highlights LuFeO Unlikely route to ferroelectricity May 16, 2012 A new type of ferroelectric, LuO2Fe4, has been investigated at the APS by a research team from Julich research center. XAS & XMCD studies on beamline 4-ID-C determined the Fe magnetism and valence, while single crystal x-ray scattering measurements at 6-ID-B & 6-ID-D probed the associated structural and charge ordering.

409

GEOL 102: Historical Geology Overview of Major Groups of Fossil Forming Organisms  

E-Print Network (OSTI)

-Quaternary): heterotrophs; "armored amoebas"; have calcareous shells (test) that grow by addition of new chambers; tests

Holtz Jr., Thomas R.

410

Method and apparatus for monitoring mercury emissions  

DOE Patents (OSTI)

A mercury monitoring device that continuously monitors the total mercury concentration in a gas. The device uses the same chamber for converting speciated mercury into elemental mercury and for measurement of the mercury in the chamber by radiation absorption techniques. The interior of the chamber is resistant to the absorption of speciated and elemental mercury at the operating temperature of the chamber. 15 figs.

Durham, M.D.; Schlager, R.J.; Sappey, A.D.; Sagan, F.J.; Marmaro, R.W.; Wilson, K.G.

1997-10-21T23:59:59.000Z

411

Method and apparatus for monitoring mercury emissions  

DOE Patents (OSTI)

A mercury monitoring device that continuously monitors the total mercury concentration in a gas. The device uses the same chamber for converting speciated mercury into elemental mercury and for measurement of the mercury in the chamber by radiation absorption techniques. The interior of the chamber is resistant to the absorption of speciated and elemental mercury at the operating temperature of the chamber.

Durham, Michael D. (Castle Rock, CO); Schlager, Richard J. (Aurora, CO); Sappey, Andrew D. (Golden, CO); Sagan, Francis J. (Lakewood, CO); Marmaro, Roger W. (Littleton, CO); Wilson, Kevin G. (Littleton, CO)

1997-01-01T23:59:59.000Z

412

Target Tracking and Engagement for Inertial Fusion Energy - A Tabletop Demonstration  

Science Conference Proceedings (OSTI)

Technical Paper / The Technology of Fusion Energy - Inertial Fusion Technology: Targets and Chambers

Lane Carlson; Mark Tillack; Thomas Lorentz; Jon Spalding; Neil Alexander; Graham Flint; Dan Goodin; Ronald Petzoldt

413

Combustor nozzle for a fuel-flexible combustion system  

DOE Patents (OSTI)

A combustor nozzle is provided. The combustor nozzle includes a first fuel system configured to introduce a syngas fuel into a combustion chamber to enable lean premixed combustion within the combustion chamber and a second fuel system configured to introduce the syngas fuel, or a hydrocarbon fuel, or diluents, or combinations thereof into the combustion chamber to enable diffusion combustion within the combustion chamber.

Haynes, Joel Meier (Niskayuna, NY); Mosbacher, David Matthew (Cohoes, NY); Janssen, Jonathan Sebastian (Troy, NY); Iyer, Venkatraman Ananthakrishnan (Mason, OH)

2011-03-22T23:59:59.000Z

414

Power Electronics and Electrical Power Systems Research Center  

Projects supported by various offices ... Environmental chamber (-50 ... for the Department of Energy Thermal Management

415

Detection device  

DOE Patents (OSTI)

The present invention is directed to a detection device comprising: (1) an entrance chamber; (2) a central chamber; and (3) an exit chamber. The central chamber includes an ionizing gas, anode, and means for connecting the anode with an external power supply and pulse counter.

Smith, J.E.

1981-02-27T23:59:59.000Z

416

Target Injection Placement Accuracy Improvement with Electrostatic Steering  

Science Conference Proceedings (OSTI)

Technical Paper / The Technology of Fusion Energy - Inertial Fusion Technology: Targets and Chambers

Ron Petzoldt; Emanuil Valmianski; Lane Carlson; Phan Huynh

417

The Challenge of an IFE Foam Capsule Overcoat  

Science Conference Proceedings (OSTI)

Technical Paper / The Technology of Fusion Energy - Inertial Fusion Technology: Targets and Chambers

Diana Schroen; Dan Goodin; Jared Hund; Reny Paguio; Barry McQuillan; Jonathan Streit

418

Simple Models for Aspects of IFE Shock Mitigation  

Science Conference Proceedings (OSTI)

Technical Paper / The Technology of Fusion Energy - Inertial Fusion Technology: Targets and Chambers

R. J. Lawrence; L. C. Chhabildas

419

Shock Mitigation Using Compressible Two-Phase Jets for Z-Pinch IFE Applications  

Science Conference Proceedings (OSTI)

Technical Paper / The Technology of Fusion Energy - Inertial Fusion Technology: Targets and Chambers

Celine C. Lascar; S. I. Abdel-Khalik; D. L. Sadowski

420

HOME GLOBAL NATIONAL POLITICS BUSINESS LIVING OPINION YOUR ICT NORTHEAST SOUTHEAST GREAT LAKES MIDWEST PLAINS SOUTHWEST NORTHWEST ALASKA/HAWAII  

E-Print Network (OSTI)

, Blackfeet Tribe of Montana and Canada, director of the Rocky Mountain Indian Chamber of Commerce; Donna

Neff, Jason

Note: This page contains sample records for the topic "xmcd chamber 6t" 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

Longitudinal Tracking of Direct Drive Inertial Fusion Targets  

Science Conference Proceedings (OSTI)

Technical Paper / The Technology of Fusion Energy - Inertial Fusion Technology: Targets and Chambers

J. D. Spalding; L. C. Carlson; M. S. Tillack; N. B. Alexander; D. T. Goodin; R. W. Petzoldt

422

Casting methods  

DOE Patents (OSTI)

A casting device includes a covered crucible having a top opening and a bottom orifice, a lid covering the top opening, a stopper rod sealing the bottom orifice, and a reusable mold having at least one chamber, a top end of the chamber being open to and positioned below the bottom orifice and a vacuum tap into the chamber being below the top end of the chamber. A casting method includes charging a crucible with a solid material and covering the crucible, heating the crucible, melting the material, evacuating a chamber of a mold to less than 1 atm absolute through a vacuum tap into the chamber, draining the melted material into the evacuated chamber, solidifying the material in the chamber, and removing the solidified material from the chamber without damaging the chamber.

Marsden, Kenneth C.; Meyer, Mitchell K.; Grover, Blair K.; Fielding, Randall S.; Wolfensberger, Billy W.

2012-12-18T23:59:59.000Z

423

System Configured For Applying Multiple Modifying Agents To A Substrate.  

DOE Patents (OSTI)

The present invention is related to the modifying of substrates with multiple modifying agents in a single continuous system. At least two processing chambers are configured for modifying the substrate in a continuous feed system. The processing chambers can be substantially isolated from one another by interstitial seals. Additionally, the two processing chambers can be substantially isolated from the surrounding atmosphere by end seals. Optionally, expansion chambers can be used to separate the seals from the processing chambers.

Propp, W. Alan (Idaho Falls, ID); Argyle, Mark D. (Idaho Falls, ID); Janikowski, Stuart K. (Idaho Falls, ID); Fox, Robert V. (Idaho Falls, ID); Toth, William J. (Idaho Falls, ID); Ginosar, Daniel M. (Idaho Falls, ID); Allen, Charles A. (Idaho Falls, ID); Miller, David L. (Idaho Falls, ID)

2005-11-08T23:59:59.000Z

424

Internal combustion engine  

DOE Patents (OSTI)

An improved engine is provided that more efficiently consumes difficult fuels such as coal slurries or powdered coal. The engine includes a precombustion chamber having a portion thereof formed by an ignition plug. The precombustion chamber is arranged so that when the piston is proximate the head, the precombustion chamber is sealed from the main cylinder or the main combustion chamber and when the piston is remote from the head, the precombustion chamber and main combustion chamber are in communication. The time for burning of fuel in the precombustion chamber can be regulated by the distance required to move the piston from the top dead center position to the position wherein the precombustion chamber and main combustion chamber are in communication.

Baker, Quentin A. (P.O. Box 6477, San Antonio, TX 78209); Mecredy, Henry E. (1630-C W. 6th, Austin, TX 78703); O' Neal, Glenn B. (6503 Wagner Way, San Antonio, TX 78256)

1991-01-01T23:59:59.000Z

425

Acoustically enhanced heat exchange and drying apparatus  

DOE Patents (OSTI)

A heat transfer apparatus includes a first chamber having a first heat transfer gas inlet, a second heat transfer gas inlet, and an outlet. A first heat transfer gas source provides a first gas flow to the first chamber through the first heat transfer gas inlet. A second gas flow through a second chamber connected to the side of the first chamber, generates acoustic waves which bring about acoustical coupling of the first and second gases in the acoustically augmented first chamber. The first chamber may also include a material inlet for receiving material to be dried, in which case the gas outlet serves as a dried material and gas outlet.

Bramlette, T. Tazwell (Livermore, CA); Keller, Jay O. (Oakland, CA)

1989-01-01T23:59:59.000Z

426

Solid oxide fuel cell generator  

DOE Patents (OSTI)

A solid oxide fuel cell generator has a pair of spaced apart tubesheets in a housing. At least two intermediate barrier walls are between the tubesheets and define a generator chamber between two intermediate buffer chambers. An array of fuel cells have tubes with open ends engaging the tubesheets. Tubular, axially elongated electrochemical cells are supported on the tubes in the generator chamber. Fuel gas and oxidant gas are preheated in the intermediate chambers by the gases flowing on the other side of the tubes. Gas leakage around the tubes through the tubesheets is permitted. The buffer chambers reentrain the leaked fuel gas for reintroduction to the generator chamber.

Draper, Robert (Churchill Boro, PA); George, Raymond A. (Pittsburgh, PA); Shockling, Larry A. (Plum Borough, PA)

1993-01-01T23:59:59.000Z

427

Genizah MS T-S AS 141.6  

E-Print Network (OSTI)

*k T-S AS 141.6 *t Glossary *s 8.4 x 11.7; 10 lines *m Paper; Explanation1 leaf; torn, holes, stained *l Judaeo-Arabic; Hebrew *c Explanation of words from Talmud...

Unknown

2011-02-24T23:59:59.000Z

428

Journal of Research of the National Institute of Standards and ...  

Science Conference Proceedings (OSTI)

... Tritium-Labeled Compounds VIII Confirmation of the Position of the Tritium in D-Glucose-6-t and D-Glucitol-5-t Lorna T. Sniegoski and Horace S ...

2011-09-21T23:59:59.000Z

429

Silicon Photonics for chemical sensing and spectroscopy, diagnosis and therapy  

E-Print Network (OSTI)

Sih & M. Paniccia, Nature Photonics 2, 170 [10] M. Krause,and E. Mazur, Nature Photonics 2, 219-225 (2008). [6] T. H.Chou, and B. Jalali, Nature Photonics 2, 48-51 (2008). [16

Hon, Kam Yan

2012-01-01T23:59:59.000Z

430

Theoretical Biology and Biophysics, T-6: Theoretical, T: LANL...  

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

Leader (Acting) Ben McMahon Administration Jenny Esch Andie McLaughlin-Kysar Office Location TA-3, Bldg 410, Rm 164 Theoretical Biology and Biophysics, T-6 T-6 focuses on the...

431

Bespredmngen - Springer  

Science Conference Proceedings (OSTI)

4) i7IEILMEYER, L. : Vortr~ige aus dem Gebiet der ktinischen Chemic und Cardiologie, S. 6t. Stuttgart: Georg Thieme t956. -- 5) KAY,. R.E., u. Mitarb.: Z. analyt.

432

REMF  

Science Conference Proceedings (OSTI)

... AL**6t~?d|*?c,*?*???*hP?$V????? 'L ?O*s?+??? m*?i **"?v]$O?*??*.6L?b.|?=w+-F??,heu*??Ee? ...

2012-11-15T23:59:59.000Z

433

No Slide Title  

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

Anti-fringe Field Coils RHIC electron lens Wolfram Fischer 11 6 T, 50 m DC, 7 kV, 0.6 A gun collectors gun Combined Horizontal and Vertical Corrector Design Both types of...

434

Regionalism in international air transportation--cooperation and competition : papers from an international conference organized by the Massachusetts Institute of Technology, held at the Amman Chamber of Commerce, Amman, Jordan, April 19-21, 1983, under the auspices of Alia, the Royal Jordanian Airline.  

E-Print Network (OSTI)

Preface: Alia: The Royal Jordanian Airline is very pleased to present this collectiont of papers originally presented at the international conference entitled, "Regionalism in International Air Transportation: Cooperation ...

Massachusetts Institute of Technology.; \\02BBAlyah.; Massachusetts Institute of Technology. Flight Transportation Laboratory

435

Cyclone reactor with internal separation and axial recirculation  

DOE Patents (OSTI)

A cyclone combustor apparatus contains a circular partition plate containing a central circular aperture. The partition plate divides the apparatus into a cylindrical precombustor chamber and a combustor chamber. A coal-water slurry is passed axially into the inlet end of the precombustor chamber, and primary air is passed tangentially into said chamber to establish a cyclonic air flow. Combustion products pass through the partition plate aperture and into the combustor chamber. Secondary air may also be passed tangentially into the combustor chamber adjacent the partition plate to maintain the cyclonic flow. Flue gas is passed axially out of the combustor chamber at the outlet end and ash is withdrawn tangentially from the combuston chamber at the outlet end. A first mixture of flue gas and ash may be tangentially withdrawn from the combustor chamber at the outlet end and recirculated to the axial inlet of the precombustor chamber with the coal-water slurry. A second mixture of flue gas and ash may be tangentially withdrawn from the outlet end of the combustor chamber and passed to a heat exchanger for cooling. Cooled second mixture is then recirculated to the axial inlet of the precombustor chamber. In another embodiment a single cyclone combustor chamber is provided with both the recirculation streams of the first mixture and the second mixture.

Becker, Frederick E. (Reading, MA); Smolensky, Leo A. (Concord, MA)

1989-01-01T23:59:59.000Z

436

1918 1918..1921  

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

water vapor pressure deficit was 0.8 kPa higher (22) than outside the chamber. The transmission of sunlight into the chambers was lower and the ratio of diffuse to direct sunlight...

437

BNL NASA Space Radiation Laboratory  

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

Dosimetry Calibration: Primary Ion Chamber Dosimetry Calibration: Primary Ion Chamber Dosimetry Calibration: Secondary Ion Chamber Dosimetry Calibration: Secondary Ion Chamber with Gain Dosimetry Calibration: Scintillator Based Dosimetry Dosimetry Calibration: Primary Ion Chamber The primary method of calibrating the dose delivered at NSRL is via a small ion chamber called a "Calibration Ion Chamber" (aka EGG counter) produced by Far West Technology. This is an air-filled bulb with electrodes for collecting ionization inside a tissue-equivalent plastic cap. The Calibration Ion Chamber is sent back to the manufacturer yearly to be calibrated using a standard gamma ray source (Cs-137). The calibration is based on a standard defied by the International Commission on Radiation Units and Measurements (ICRU) and reported in their ICRU Report 59, 15 December 1998.

438

Calorimeter based detectors for high energy hadron colliders  

Science Conference Proceedings (OSTI)

This report discusses the following topics: the central calorimeter; and installation; commissioning; and calorimeter beam tests; the central drift chamber; cosmic ray and beam tests; chamber installation and commissioning; and software development; and SSC activities: the EMPACT project.

Marx, M.D.; Rijssenbeek, M. (State Univ. of New York, Stony Brook, NY (USA))

1990-01-01T23:59:59.000Z

439

Argonne CNM: Nanofabrication and Devices Capabilities  

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

PECVD System for CNT and Graphene Synthesis Dry Etching RIE Oxford PlasmaLab 100, Chlorine Chamber RIE Oxford PlasmaLab 100, Fluorine Chamber RIE March CS-1701, Chlorine...

440

NREL: News Feature - Best for Batteries: Not Too Hot, Not Too...  

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

Photo is from the bottom of the chamber looking up. Enlarge image NREL's Large-Volume Battery Calorimeter has the highest-capacity chamber in the world for testing of this kind....

Note: This page contains sample records for the topic "xmcd chamber 6t" 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

Variable residence time vortex combustor  

DOE Patents (OSTI)

A variable residence time vortex combustor including a primary combustion chamber for containing a combustion vortex, and a plurality of louvres peripherally disposed about the primary combustion chamber and longitudinally distributed along its primary axis. The louvres are inclined to impel air about the primary combustion chamber to cool its interior surfaces and to impel air inwardly to assist in driving the combustion vortex in a first rotational direction and to feed combustion in the primary combustion chamber. The vortex combustor also includes a second combustion chamber having a secondary zone and a narrowed waist region in the primary combustion chamber interconnecting the output of the primary combustion chamber with the secondary zone for passing only lower density particles and trapping higher density particles in the combustion vortex in the primary combustion chamber for substantial combustion.

Melconian, Jerry O. (76 Beaver Rd., Reading, MA 01867)

1987-01-01T23:59:59.000Z

442

Hydraulic engine valve actuation system including independent feedback control  

DOE Patents (OSTI)

A hydraulic valve actuation assembly may include a housing, a piston, a supply control valve, a closing control valve, and an opening control valve. The housing may define a first fluid chamber, a second fluid chamber, and a third fluid chamber. The piston may be axially secured to an engine valve and located within the first, second and third fluid chambers. The supply control valve may control a hydraulic fluid supply to the piston. The closing control valve may be located between the supply control valve and the second fluid chamber and may control fluid flow from the second fluid chamber to the supply control valve. The opening control valve may be located between the supply control valve and the second fluid chamber and may control fluid flow from the supply control valve to the second fluid chamber.

Marriott, Craig D

2013-06-04T23:59:59.000Z

443

Experimental Investigations of Ice in Supercooled Clouds. Part 1: System Description and Growth of Ice by Vapor Deposition  

Science Conference Proceedings (OSTI)

A continuous flow cloud chamber system was constructed for studies of microphysical and chemical processes in supercooled clouds. An important feature of the cloud chamber was the generation of the components of the supercooled clouds external to ...

Naihui Song; Dennis Lamb

1994-01-01T23:59:59.000Z

444

OSTI, US Dept of Energy, Office of Scientific and Technical Informatio...  

Office of Scientific and Technical Information (OSTI)

Tennessee Chamber of Commerce and Industry Topic TENNESSEE CHAMBER OF COMMERCE & INDUSTRY LAUDS OSTI by Kate Bannan 30 Jun, 2011 in Science Communications We are proud to note that...

445

Sandia National Laboratories: Research: Facilities: Technology...  

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

High Altitude Chamber High Altitude chamber Technical Characteristics 27-foot diameter vacuum sphere Simulate altitudes up to 230,000 feet Test articles up to 1-ton weight and 60...

446

Providing Plastic Zone Extrusion - Oak Ridge National Laboratory ...  

First, stock may be placed in a chamber. Then frictional heat may be generated within the stock to heat the stock to a plastic zone of the stock in the chamber.

447

NETL F 451.1-1/1 Categorical Exclusion (CX) Designation Form  

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

01042010 - 12312011 Santa Clara, Ca Advanced Epi Tools for Gallium Nitride Light Emitting Diode Devices To develop a multi-chamber system such as a two MOCVD chambers, one...

448

Deputy Secretary Poneman's Remarks as Prepared for Delivery at...  

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

as Prepared for Delivery at the American Chamber of Commerce in Korea Deputy Secretary Poneman's Remarks as Prepared for Delivery at the American Chamber of Commerce in Korea June...

449

RF Loading Effects of Aircraft Seats in an Electromagnetic Reverberating Environment  

Science Conference Proceedings (OSTI)

Loading effects of aircraft seats in an electromagnetic reverberating environment are investigated. The effects are determined by comparing the reverberation chamber''s insertion losses with and without the seats. The average per-seat absorption cross-sections ...

Nguyen Truong X.

2000-12-01T23:59:59.000Z

450

Anti-pollution equipment  

SciTech Connect

A barrier for the containment and recovery of oil spilled on water comprises a first buoyant air chamber, a ballast water chamber, an oil and water discharge tube and a second buoyant air chamber. The first air chamber has a plurality of sections of reduced diameter, which together with the ballast water chamber define a series of weirs for oil and water to pass into gallery formed by the ballast water chamber, the oil and water discharge tube and the second air chamber. Pumps may be provided in the oil and water discharge tube to remove oil from the gallery. The second air chamber provides buoyancy to maintain the optimum configuration of the weirs.

Webb, M.G.

1982-01-12T23:59:59.000Z

451

Atmos. Chem. Phys., 10, 96159630, 2010 www.atmos-chem-phys.net/10/9615/2010/  

E-Print Network (OSTI)

of 12­44 % in fresh emissions from in- use diesel engines in a chamber (Chirico et al., 2010). Tunnel

Meskhidze, Nicholas

452

LANL | Partnering | User Facility - Los Alamos National Lab ...  

Data acquisition developed in-house, which integrates data acquisition from all chambers Facility Access. The Personal Protective ...

453

STUDY OF HELIUM RETENTION IN NANO-CAVITY ...  

Science Conference Proceedings (OSTI)

STUDY OF HELIUM RETENTION IN NANO-CAVITY TUNGSTEN AS A FIRST WALL IN A FUSION CHAMBER USING NEUTRON DEPTH ...

454

Estimating the Impact of Invasive Spartina densiflora on Primary Productivity in Humboldt Bay  

E-Print Network (OSTI)

closed-chamber atmospheric carbon dioxide flux measurementsmarsh. Atmospheric carbon dioxide flux measurements wereobtained, atmospheric carbon dioxide flux measurements in

Purcell O'Dowd, Alison

2012-01-01T23:59:59.000Z

455

KIVA--Hydrodynamics Model for Chemically Reacting Flow ...  

Simulation of an experimental engine with DOHC quasi-symmetric pent-roof combustion chamber and 4 valves.

456

Growth of AlN lms using hydrazidoalane single-source precursors Younsoo Kima  

E-Print Network (OSTI)

. The stainless steel chamber was roughed with a mechanical pump and evacuated with an oil diffusion pump

Kim, Bongsoo

457

Spontaneity in Social Protest: April 2001 Shopkeeper Protests in Turkey  

E-Print Network (OSTI)

Ankara Samsun Erzurum Izmir Antalya Konya Adana GaziantepSimilarly, the head of ?zmirs local union of chambers,

Gemici, Kurtulus

2003-01-01T23:59:59.000Z

458

The State of the Region HAMPTON ROADS 2011  

E-Print Network (OSTI)

and Frank Batten Jr. Foundation Hampton Roads Chamber of Commerce R. Bruce Bradley Kaufman and Canoles Ramon

459

June 11, 1999: National Ignition Facility  

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

June 11, 1999Secretary Richardson dedicates the National Ignition Facility target chamber at DOE's Lawrence Livermore National Laboratory.

460

Climate Change Mitigation: Climate, Health, and Equity Implications of the Visible and the Hidden  

E-Print Network (OSTI)

ceramic wood stove with an internal combustion chamber, thencombustion coal (power generation) diesel fuel (on-road) Wood (

Shonkoff, Seth Berrin

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "xmcd chamber 6t" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


461

Process Description  

Science Conference Proceedings (OSTI)

...lends itself to high production rates.The gas is pumped from the densification chamber back into the

462

c . .. . [1  

E-Print Network (OSTI)

, a drift chamber simulation program. [7] R.H. Fowler, L. Nordheim. Electron Emission in Intense Electric

463

2/2&3 January -August 2001 25 Writing as a Teaching and Learning Tool  

E-Print Network (OSTI)

consisted of a dark operant chamber equipped with two levers, one LED (Light Emitting Diode) above each

Larkin, Teresa L.

464

7/7/03-7/11/03 Progress Update  

Science Conference Proceedings (OSTI)

... aligned. Also, lead ballast has been installed in the counterbalance chamber. The detector and shielding are installed. ...

465

Method and apparatus for filling thermal insulating systems  

DOE Patents (OSTI)

A method for filling insulated glazing units is disclosed. The method utilizes a vacuum chamber in which the insulated glazing units are placed. The insulated glazing units and vacuum chamber are evacuated simultaneously. The units are then refilled with a low conductance gas such as Krypton while the chamber is simultaneously refilled with air.

Arasteh, Dariush K. (Oakland, CA)

1992-01-01T23:59:59.000Z

466

ORIGINAL ARTICLE Stress tolerance in plants via  

E-Print Network (OSTI)

of sand or soil in the upper chamber. Fluid is added to the bottom chamber and a tight- fitting lid) of sterile sand or Sunshine Mix no. 4 (40±0.5 g; Figure 1). The lower chamber was filled with 200 ml containing the plant is removed and wrapped with thermal tape at the soil or sand line and temperature

Van Volkenburgh, Elizabeth

467

INSTITUTE OF PHYSICS PUBLISHING PLASMA PHYSICS AND CONTROLLED FUSION Plasma Phys. Control. Fusion 47 (2005) B263B283 doi:10.1088/0741-3335/47/12B/S20  

E-Print Network (OSTI)

of the chamber and the TF coil systems, allowing direct access for remote handling to achieve the required of ITER, all chamber systems must allow relatively straightforward replacement via remote handling. Vertical cross section view of a CTF configured for full remote handling of all chamber systems. factors

Princeton Plasma Physics Laboratory

468

Cyclone reactor with internal separation and axial recirculation  

DOE Patents (OSTI)

A cyclone combustor apparatus contains a circular partition plate containing a central circular aperture is described. The partition plate divides the apparatus into a cylindrical precombustor chamber and a combustor chamber. A coal-water slurry is passed axially into the inlet end of the precombustor chamber, and primary air is passed tangentially into said chamber to establish a cyclonic air flow. Combustion products pass through the partition plate aperture and into the combustor chamber. Secondary air may also be passed tangentially into the combustor chamber adjacent the partition plate to maintain the cyclonic flow. Flue gas is passed axially out of the combustor chamber at the outlet end and ash is withdrawn tangentially from the combustor chamber at the outlet end. A first mixture of flue gas and ash may be tangentially withdrawn from the combustor chamber at the outlet end and recirculated to the axial inlet of the precombustor chamber with the coal-water slurry. A second mixture may be tangentially withdrawn from the outlet end and passed to a heat exchanger for cooling. Cooled second mixture is then recirculated to the axial inlet of the precombustor chamber. In another embodiment a single cyclone combustor chamber is provided with both the recirculation streams of the first mixture and the second mixture. 10 figs.

Becker, F.E.; Smolensky, L.A.

1988-07-19T23:59:59.000Z

469

Remarks on Configuration, Assembly and Stringing of the  

E-Print Network (OSTI)

;Using the Space Vacated by the Aerogel We should plan now to use this space. 1. Build chamber-chamber concept can be built. 2 #12;Changes in the BABAR Environment Forward aerogel system as presently planned, but slide it forward 20 cm. 2. Build chamber to present design but 20 cm longer. 3

McDonald, Kirk

470

Remarks on Configuration, Assembly and Stringing of the  

E-Print Network (OSTI)

; Using the Space Vacated by the Aerogel We should plan now to use this space. 1. Build chamber of drift­chamber concept can be built. 2 #12; Changes in the BABAR Environment Forward aerogel system as presently planned, but slide it forward 20 cm. 2. Build chamber to present design but 20 cm longer. 3

McDonald, Kirk

471

Method and apparatus for filling thermal insulating systems  

DOE Patents (OSTI)

A method for filling insulated glazing units is disclosed. The method utilizes a vacuum chamber in which the insulated glazing units are placed. The insulated glazing units and vacuum chamber are evacuated simultaneously. The units are then refilled with a low conductance gas such as Krypton while the chamber is simultaneously refilled with air. 3 figs.

Arasteh, D.K.

1992-01-14T23:59:59.000Z

472

Spar buoy construction having production and oil storage facilities and method of operation  

SciTech Connect

This patent describes a floating structure including oil storage capacity and production facilities and adapted to be anchored by catenary mooring lines at a subsea well location, the combination of: a vertical elongated hull means having means to maintain the hull means in vertical position; the hull means including a vertical oil storage chamber means for storing oil and extending for a major portion of the height of the floating structure; vertical variable ballast chamber means extending from the bottom of the storage chamber means to above the top of the oil storage chamber means and selectively filled with ballast to maintain the center of gravity of the structure a selected distance from the center of buoyancy of the structure; work chamber means in the hull means above the oil storage chamber means; means in the work chamber means and in the variable ballast chamber means for controlling the amount of ballast in the variable ballast means; means in the oil storage chamber means and in the work chamber means for feeding oil to the oil storage chamber means and for removing water therefrom as oil is introduced therein; a central longitudinal passageway through the hull means; a riser means extending into the passageway from the subsea well location and terminating at the work chamber means; means on the riser buoyant tank means and on the hull means in the central passageway for guiding relative movement between the hull means and the riser means.

Daniell, A.F.

1986-08-19T23:59:59.000Z

473

Closed circuit steam cooled turbine shroud and method for steam cooling turbine shroud  

SciTech Connect

A turbine shroud cooling cavity is partitioned to define a plurality of cooling chambers for sequentially receiving cooling steam and impingement cooling of the radially inner wall of the shoud. An impingement baffle is provided in each cooling chamber for receiving the cooling media from a cooling media inlet in the case of the first chamber or from the immediately upstream chamber in the case of the second through fourth chambers and includes a plurality of impingement holes for effecting the impingement cooling of the shroud inner wall.

Burdgick, Steven Sebastian (Schenectady, NY); Sexton, Brendan Francis (Simpsonville, SC); Kellock, Iain Robertson (Simpsonville, SC)

2002-01-01T23:59:59.000Z

474

Extracellular bioreduction  

DOE Patents (OSTI)

A method for processing environmental or industrial samples to remove, reclaim or otherwise reduce the level of chemical species present in the sample that act as redox active species. The redox active species is kept in a waste chamber and is separated from an aqueous bacterial culture that is held in a culture chamber. The waste chamber and the culture chamber are separated by a porous membrane through which electron transfer can occur but through which the aqueous bacterial culture cannot pass. The redox active species substantially remains in the waste chamber and is in non-contact with the aqueous bacterial culture during the process of removal, reduction or reclamation.

Chidambaram, Devicharan (Middle Island, NY); Francis, Arokiasamy J. (Middle Island, NY)

2012-04-17T23:59:59.000Z

475

Design for Ceramic Membrane Reactor with two Reactant Gases at Different Pressures  

DOE Patents (OSTI)

The invention is a ceramic membrane reactor for syngas production having a reaction chamber, an inlet in the reactor for natural gas intake, a plurality of oxygen permeating ceramic slabs inside the reaction chamber with each slab having a plurality of passages paralleling the gas flow for transporting air through the reaction chamber, a manifold affixed to one end of the reaction chamber for intake of air connected to the slabs, a second manifold affixed to the reactor for removing the oxygen depleted air, and an outlet in the reaction chamber for removing syngas.

Balachandran, Uthamalingam; Mieville, Rodney L.

1998-11-18T23:59:59.000Z

476

Low emissions compression ignited engine technology  

DOE Patents (OSTI)

A method and apparatus for operating a compression ignition engine having a cylinder wall, a piston, and a head defining a combustion chamber. The method and apparatus includes delivering fuel substantially uniformly into the combustion chamber, the fuel being dispersed throughout the combustion chamber and spaced from the cylinder wall, delivering an oxidant into the combustion chamber sufficient to support combustion at a first predetermined combustion duration, and delivering a diluent into the combustion chamber sufficient to change the first predetermined combustion duration to a second predetermined combustion duration different from the first predetermined combustion duration.

Coleman, Gerald N. (Dunlap, IL); Kilkenny, Jonathan P. (Peoria, IL); Fluga, Eric C. (Dunlap, IL); Duffy, Kevin P. (East Peoria, IL)

2007-04-03T23:59:59.000Z

477

Low emission internal combustion engine  

DOE Patents (OSTI)

A low emission, internal combustion compression ignition engine having a cylinder, a piston movable in the cylinder and a pre-combustion chamber communicating with the cylinder near the top thereof and in which low emissions of NO.sub.x are achieved by constructing the pre-combustion chamber to have a volume of between 70% and 85% of the combined pre-chamber and main combustion chamber volume when the piston is at top dead center and by variably controlling the initiation of fuel injection into the pre-combustion chamber.

Karaba, Albert M. (Muskegon, MI)

1979-01-01T23:59:59.000Z

478

Ceramic membrane reactor with two reactant gases at different pressures  

DOE Patents (OSTI)

The invention is a ceramic membrane reactor for syngas production having a reaction chamber, an inlet in the reactor for natural gas intake, a plurality of oxygen permeating ceramic slabs inside the reaction chamber with each slab having a plurality of passages paralleling the gas flow for transporting air through the reaction chamber, a manifold affixed to one end of the reaction chamber for intake of air connected to the slabs, a second manifold affixed to the reactor for removing the oxygen depleted air, and an outlet in the reaction chamber for removing syngas.

Balachandran, Uthamalingam (Hinsdale, IL); Mieville, Rodney L. (Glen Ellyn, IL)

2001-01-01T23:59:59.000Z

479

METHOD FOR MEASURING RADIATION  

DOE Patents (OSTI)

A method for measuring an unknown integrated quantity of radiation with a condenser ionization chamber is described. The chamber is initially charged to a predetermined voltage by a voltage source. The chamber is then removed from the source and exposed to an unknown quantity of radiation for a period of time. The quantity of radiation to which the chamber was exposed is then measured by detecting the magnitude of the pulse of current necessary to recharge the chamber of its initial value through a suitable impedance. The current pulse is amplified and measured directly by a suitable pulse height analyzing system. (AEC)

Roesch, W.C.; McCall, R.C.

1961-11-21T23:59:59.000Z

480

Method for lowering the VOCS emitted during drying of wood products  

DOE Patents (OSTI)

The present invention is directed to a method for removal of VOCs from wood products prior to drying the wood products. The method of the invention includes the steps of providing a chamber having an opening for receiving wood and loading the chamber with green wood. The wood is loaded to an extent sufficient to provide a limited headspace in the chamber. The chamber is then closed and the wood is heated in the chamber for a time and at a temperature sufficient to saturate the headspace with moisture and to substantially transfer VOCs from the wood product to the moisture in the headspace.

Banerjee, Sujit (1832 Jacksons Creek Point, Marietta, GA 30068); Boerner, James Robert (154 Junedale Rd., Cincinnati, OH 45218); Su, Wei (2262 Orleans Ave., Marietta, GA 30062)

2000-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "xmcd chamber 6t" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


481

NEUTRONIC REACTION SYSTEM  

DOE Patents (OSTI)

A nuclear reactor system is described for breeding fissionable material, including a heat-exchange tank, a high- and a low-pressure chamber therein, heat- exchange tubes connecting these chambers, a solution of U/sup 233/ in heavy water in a reaction container within the tank, a slurry of thorium dioxide in heavy water in a second container surrounding the first container, an inlet conduit including a pump connecting the low pressure chamber to the reaction container, an outlet conduit connecting the high pressure chamber to the reaction container, and means of removing gaseous fission products released in both chambers. (AEC)

Wigner, E.P.

1963-09-01T23:59:59.000Z

482

Corrosion test cell for bipolar plates  

DOE Patents (OSTI)

A corrosion test cell for evaluating corrosion resistance in fuel cell bipolar plates is described. The cell has a transparent or translucent cell body having a pair of identical cell body members that seal against opposite sides of a bipolar plate. The cell includes an anode chamber and an cathode chamber, each on opposite sides of the plate. Each chamber contains a pair of mesh platinum current collectors and a catalyst layer pressed between current collectors and the plate. Each chamber is filled with an electrolyte solution that is replenished with fluid from a much larger electrolyte reservoir. The cell includes gas inlets to each chamber for hydrogen gas and air. As the gases flow into a chamber, they pass along the platinum mesh, through the catalyst layer, and to the bipolar plate. The gas exits the chamber through passageways that provide fluid communication between the anode and cathode chambers and the reservoir, and exits the test cell through an exit port in the reservoir. The flow of gas into the cell produces a constant flow of fresh electrolyte into each chamber. Openings in each cell body is member allow electrodes to enter the cell body and contact the electrolyte in the reservoir therein. During operation, while hydrogen gas is passed into one chamber and air into the other chamber, the cell resistance is measured, which is used to evaluate the corrosion properties of the bipolar plate.

Weisbrod, Kirk R. (Los Alamos, NM)

2002-01-01T23:59:59.000Z

483

Method and apparatus for incinerating hazardous waste  

DOE Patents (OSTI)

An incineration apparatus and method for disposal of infectious hazardous waste including a fluidized bed reactor containing a bed of granular material. The reactor includes a first chamber, a second chamber, and a vertical partition separating the first and second chambers. A pressurized stream of air is supplied to the reactor at a sufficient velocity to fluidize the granular material in both the first and second chambers. Waste materials to be incinerated are fed into the first chamber of the fluidized bed, the fine waste materials being initially incinerated in the first chamber and subsequently circulated over the partition to the second chamber wherein further incineration occurs. Coarse waste materials are removed from the first chamber, comminuted, and recirculated to the second chamber for further incineration. Any partially incinerated waste materials and ash from the bottom of the second chamber are removed and recirculated to the second chamber for further incineration. This process is repeated until all infectious hazardous waste has been completely incinerated.

Korenberg, Jacob (York, PA)

1990-01-01T23:59:59.000Z

484

LS-  

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

9 9 Eigenmodes in Two Simplified Chamber Structures Studied for Spurious Microwaves in the APS Storage Ring Beam Chamber Xiang Sun and Glenn Decker April 30, 2003 Abstract The vertical readback errors are one order of magnitude greater than the horizontal ones in the APS storage ring beam chamber. To learn and solve this problem, we simulate the eigenmodes in two chamber structures, which are simplified from the APS storage ring beam chamber, and find their dependence on the variation of the chamber structures. These two structures are introduced as the solutions to separate and then restrain the spurious microwave modes by using a metal short block and a plate inside the chamber. The short block can shift and separate the frequencies of every mode

485

A coal-water slurry fueled internal combustion engine and method for operating same  

DOE Patents (OSTI)

An internal combustion engine fueled with a coal-water slurry is described. About 90 percent of the coal-water slurry charge utilized in the power cycle of the engine is directly injected into the main combustion chamber where it is ignited by a hot stream of combustion gases discharged from a pilot combustion chamber of a size less than about 10 percent of the total clearance volume of main combustion chamber with the piston at top dead center. The stream of hot combustion gases is provided by injecting less than about 10 percent of the total coal-water slurry charge into the pilot combustion chamber and using a portion of the air from the main combustion chamber that has been heated by the walls defining the pilot combustion chamber as the ignition source for the coal-water slurry injected into the pilot combustion chamber.

McMillian, M.H.

1992-12-31T23:59:59.000Z

486

Coal-water slurry fuel internal combustion engine and method for operating same  

SciTech Connect

An internal combustion engine fueled with a coal-water slurry is described. About 90 percent of the coal-water slurry charge utilized in the power cycle of the engine is directly injected into the main combustion chamber where it is ignited by a hot stream of combustion gases discharged from a pilot combustion chamber of a size less than about 10 percent of the total clearance volume of main combustion chamber with the piston at top dead center. The stream of hot combustion gases is provided by injecting less than about 10 percent of the total coal-water slurry charge into the pilot combustion chamber and using a portion of the air from the main combustion chamber that has been heated by the walls defining the pilot combustion chamber as the ignition source for the coal-water slurry injected into the pilot combustion chamber.

McMillian, Michael H. (Fairmont, WV)

1992-01-01T23:59:59.000Z

487

Spray bottle apparatus with force multiply pistons  

DOE Patents (OSTI)

The present invention comprises a spray bottle in which the pressure resulting from the gripping force applied by the user is amplified and this increased pressure used in generating a spray such as an aerosol or fluid stream. In its preferred embodiment, the invention includes a high pressure chamber and a corresponding piston which is operative for driving fluid out of this chamber at high pressure through a spray nozzle and a low pressure chamber and corresponding piston which is acted upon by the hydraulic pressure within the bottle resulting from the gripping force. The low pressure chamber and piston are of larger size than the high pressure chamber and piston. The pistons are rigidly connected so that the force created by the pressure acting on the piston in the low pressure chamber is transmitted to the piston in the high pressure chamber where it is applied over a more limited area thereby generating greater hydraulic pressure for use in forming the spray.

Eschbach, Eugene A. (Richland, WA)

1992-01-01T23:59:59.000Z

488

Spray bottle apparatus with pressure multiplying pistons  

DOE Patents (OSTI)

The present invention comprises a spray bottle in which the pressure resulting from the gripping force applied by the user is amplified and this increased pressure used in generating a spray such as an aerosol or fluid stream. In its preferred embodiment, the invention includes a high pressure chamber and a corresponding piston which is operative for driving fluid out of this chamber at high pressure through a spray nozzle and a low pressure chamber and a corresponding piston which is acted upon the hydraulic pressure within the bottle resulting from the gripping force. The low pressure chamber and piston are of larger size than the high pressure chamber and piston. The pistons are rigidly connected so that the force created by the pressure acting on the piston in the low pressure chamber is transmitted to the piston in the high pressure chamber where it is applied over a more limited area thereby generating greater hydraulic pressure for use in forming the spray.

Moss, Owen R. (Kennewick, WA); Gordon, Norman R. (Kennewick, WA); DeFord, Henry S. (Kennewick, WA)

1990-01-01T23:59:59.000Z

489

Method of plasma etching Ga-based compound semiconductors  

SciTech Connect

A method of plasma etching Ga-based compound semiconductors includes providing a process chamber and a source electrode adjacent to the process chamber. The process chamber contains a sample comprising a Ga-based compound semiconductor. The sample is in contact with a platen which is electrically connected to a first power supply, and the source electrode is electrically connected to a second power supply. The method includes flowing SiCl.sub.4 gas into the chamber, flowing Ar gas into the chamber, and flowing H.sub.2 gas into the chamber. RF power is supplied independently to the source electrode and the platen. A plasma is generated based on the gases in the process chamber, and regions of a surface of the sample adjacent to one or more masked portions of the surface are etched to create a substantially smooth etched surface including features having substantially vertical walls beneath the masked portions.

Qiu, Weibin; Goddard, Lynford L.

2012-12-25T23:59:59.000Z

490

Active microchannel heat exchanger  

DOE Patents (OSTI)

The present invention is an active microchannel heat exchanger with an active heat source and with microchannel architecture. The active microchannel heat exchanger has (a) an exothermic reaction chamber; (b) an exhaust chamber; and (c) a heat exchanger chamber in thermal contact with the exhaust chamber, wherein (d) heat from the exothermic reaction chamber is convected by an exothermic reaction exhaust through the exhaust chamber and by conduction through a containment wall to the working fluid in the heat exchanger chamber thereby raising a temperature of the working fluid. The invention is particularly useful as a liquid fuel vaporizer and/or a steam generator for fuel cell power systems, and as a heat source for sustaining endothermic chemical reactions and initiating exothermic reactions.

Tonkovich, Anna Lee Y. (Pasco, WA); Roberts, Gary L. (West Richland, WA); Call, Charles J. (Pasco, WA); Wegeng, Robert S. (Richland, WA); Wang, Yong (Richland, WA)

2001-01-01T23:59:59.000Z

491

Capacitively coupled RF diamond-like-carbon reactor  

DOE Patents (OSTI)

A process of coating a non-conductive fiber with diamond-like carbon, including passing a non-conductive fiber between a pair of parallel metal grids within a reaction chamber, introducing a hydrocarbon gas into the reaction chamber, forming a plasma within the reaction chamber for a sufficient period of time whereby diamond-like carbon is formed upon the non-conductive fiber, is provided together with a reactor chamber for deposition of diamond-like carbon upon a non-conductive fiber, including a vacuum chamber, a cathode assembly including a pair of electrically isolated opposingly parallel metal grids spaced apart at a distance of less than about 1 centimeter, an anode, a means of introducing a hydrocarbon gas into said vacuum chamber, and a means of generating a plasma within said vacuum chamber.

Devlin, David James (Los Alamos, NM); Coates, Don Mayo (Santa Fe, NM); Archuleta, Thomas Arthur (Espanola, NM); Barbero, Robert Steven (Santa Cruz, NM)

2000-01-01T23:59:59.000Z

492

Method and apparatus for obtaining enhanced production rate of thermal chemical reactions  

DOE Patents (OSTI)

The present invention is a method and apparatus (vessel) for providing a heat transfer rate from a reaction chamber through a wall to a heat transfer chamber substantially matching a local heat transfer rate of a catalytic thermal chemical reaction. The key to the invention is a thermal distance defined on a cross sectional plane through the vessel inclusive of a heat transfer chamber, reaction chamber and a wall between the chambers. The cross sectional plane is perpendicular to a bulk flow direction of the reactant stream, and the thermal distance is a distance between a coolest position and a hottest position on the cross sectional plane. The thermal distance is of a length wherein the heat transfer rate from the reaction chamber to the heat transfer chamber substantially matches the local heat transfer rate.

Tonkovich, Anna Lee Y [Pasco, WA; Wang, Yong [Richland, WA; Wegeng, Robert S [Richland, WA; Gao, Yufei [Kennewick, WA

2003-04-01T23:59:59.000Z

493

Low emission combustor  

SciTech Connect

A low emission combustor assembly particularly suited for an automotive gas turbine engine has an inlet plenum supplied with regenerated compressor discharge, an exhaust plenum, a diffusion flame combustion chamber disposed between the inlet and exhaust plenums, and a catalytic combustion chamber also disposed between the inlet and exhaust plenums so that parallel flow paths are established between the inlet and exhaust plenums. During engine start-up, fuel is supplied only to the diffusion flame combustion chamber and regenerated compressor discharge simultaneously flowing through the catalytic combustion chamber heats the catalyst to operating temperature and cools and dilutes exhaust from the diffusion flame combustion chamber. When the catalyst reaches operating temperature fuel is directed only to the catalytic combustion chamber wherein an ultra lean air/fuel ratio mixture is catalytically oxidized, the exhaust from this reaction being cooled and diluted by regenerated compressor discharge simultaneously flowing through the diffusion flame combustion chamber.

Cornelius, W.; Klomp, E.D.; Kosek, T.P.

1984-02-28T23:59:59.000Z

494

Method for packed column separations and purifications  

DOE Patents (OSTI)

The invention encompasses a method of packing and unpacking a column chamber. A mixture of a fluid and a matrix material are introduced through a column chamber inlet so that the matrix material is packed within a column chamber to form a packed column. The column chamber having the column chamber inlet or first port for receiving the mixture further has an outlet port and an actuator port. The outlet port is partially closed for capturing the matrix material and permitting the fluid to flow therepast by rotating relative one to the other of a rod placed in the actuator port. Further rotation relative one to the other of the rod and the column chamber opens the outlet and permits the matrix material and the fluid to flow therethrough thereby unpacking the matrix material from the column chamber.

Holman, David A. (Richland, WA); Bruckner-Lea, Cynthia J. (Richland, WA); Brockman, Fred J. (Kennewick, WA); Chandler, Darrell P. (Richland, WA)

2006-08-15T23:59:59.000Z

495

Ionization detection system for aerosols  

DOE Patents (OSTI)

This invention relates to an improved smoke-detection system of the ionization-chamber type. In the preferred embodiment, the system utilizes a conventional detector head comprising a measuring ionization chamber, a reference ionization chamber, and a normally non-conductive gas triode for discharging when a threshold concentration of airborne particulates is present in the measuring chamber. The improved system utilizes a measuring ionization chamber which is modified to minimize false alarms and reductions in sensitivity resulting from changes in ambient temperature. In the preferred form of the modification, an annular radiation shield is mounted about the usual radiation source provided to effect ionization in the measuring chamber. The shield is supported by a bimetallic strip which flexes in response to changes in ambient temperature, moving the shield relative to the source so as to vary the radiative area of the source in a manner offsetting temperature-induced variations in the sensitivity of the chamber.

Jacobs, Martin E. (Chillicothe, OH)

1977-01-01T23:59:59.000Z

496

Electronic Structure and Magnetism in Diluted Magnetic Semiconductors  

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

Electronic Structure and Magnetism in Diluted Magnetic Semiconductors Print Electronic Structure and Magnetism in Diluted Magnetic Semiconductors Print The possibility of using electrons' spins in addition to their charge in information technology has created much enthusiasm for a new field of electronics popularly known as "spintronics." An intensely studied approach to obtaining spin-polarized carriers for data-storage devices is the use of diluted magnetic semiconductors created by doping ions like Mn, Fe, or Co having a net spin into a semiconducting host such as GaAs, ZnO, or GaN. The interaction among these spins leads to ferromagnetic order at low temperatures, which is necessary to create spin-polarized carriers. A research team working at ALS Beamline 4.0.2 and European Synchrotron Radiation Facility Beamline ID8 made a big leap forward in clarifying the microscopic picture of magnetism and anisotropy in Mn-doped GaAs by resolving localized and hybridized d states using angle-dependent x-ray magnetic circular dichroism (XMCD) measurements.