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Fabrication and test of prototype ring magnets for the ALS (Advanced Light Source)

Description: Prototype Models for the Advanced Light Source (ALS) Booster Dipole, Quadrupole and Sextupole and the Storage Ring Gradient Magnet, Quadrupole and Sextupole have been constructed. The Booster Magnet Prototypes have been tested. The Storage Ring Magnets are presently undergoing tests and magnetic measurements. This paper reviews the designs and parameters for these magnets, briefly describes features of the magnet designs which respond to the special constraints imposed by the requirements for b… more
Date: March 1, 1989
Creator: Tanabe, J.; Avery, R.; Caylor, R.; Green, M.I.; Hoyer, E.; Halbach, K. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Final focus test beam alignment: A draft proposal

Description: The Final Focus Test Beam is a transport line designed to transmit 50 GeV electron beams of SLC emittance (3 {times} 10{sup {minus}10} radian-meters) straight through the central arm of the Beam Switchyard (BSY C line) with a final focus point out in the Research Yard but relatively near the end of the switchyard tunnel. The hardware, methods and procedures outlined in this proposal are dedicated to measuring the placement of mechanical objects with respect to certain defined geometric axes. We… more
Date: March 1, 1989
Creator: Fischer, G. E. & Ruland, R. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Finding the magnetic center of a quadrupole to high resolution: A draft proposal

Description: In a companion proposal it is proposed to align quadrupoles of a transport line to within transverse tolerances of 5 to 10 micrometers. Such a proposal is meaningful only if the effective magnetic center of such lenses can in fact be repeatably located with respect to some external mechanical tooling to comparable accuracy. It is the purpose of this note to describe some new methods and procedures that will accomplish this aim. It will be shown that these methods are capable of yielding greater… more
Date: March 1, 1989
Creator: Fischer, G.E.; Cobb, J.K. & Jensen, D.R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Advanced Light Source Linac subharmonic buncher cavities

Description: The Linear Accelerator (Linac) in the Advanced Light Source (ALS) is designed to provide either single or multiple bunches of 50 MeV electrons for the booster synchrotron. Three bunchers are used in the Linac. The 3 GHz S band buncher has been described elsewhere. This report deals with the two lower subharmonic bunchers. One operates at 124.914 MHz while the other operates at 499.654 MHz. 12 refs., 2 figs.
Date: March 1, 1989
Creator: Lo, C.C.; Taylor, B.; Lancaster, H. & Guigli, J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Report on the Lake Arrowhead workshop on advanced acceleration concepts

Description: We review the present status of the field of New Acceleration Concepts, as presented at the Lake Arrowhead workshop, held at the beginning of 1989. Many new and promising results have been obtained recently, and the field is actively developing. We discuss briefly some of the main results presented at the workshop. 43 refs., 2 tabs.
Date: March 1, 1989
Creator: Pellegrini, C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The TITAN Reversed-Field Pinch fusion reactor study

Description: The TITAN Reversed-Field Pinch (RFP) fusion reactor study is a multi-institutional research effort to determine the technical feasibility and key developmental issues of an RFP fusion reactor, especially at high power density, and to determine the potential economics, operations, safety, and environmental features of high-mass-power-density fusion systems. The TITAN conceptual designs are DT burning, 1000 MWe power reactors based on the RFP confinement concept. The designs are compact, have a h… more
Date: March 1, 1988
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Up-Scaling Geochemical Reaction Rates for Carbon Dioxide (CO2) in Deep Saline Aquifers

Description: The overall goal of the project was to bridge the gap between our knowledge of small-scale geochemical reaction rates and reaction rates meaningful for modeling transport at core scales. The working hypothesis was that reaction rates, determined from laboratory measurements based upon reactions typically conducted in well mixed batch reactors using pulverized reactive media may be significantly changed in in situ porous media flow due to rock microstructure heterogeneity. Specifically we hypoth… more
Date: March 3, 2009
Creator: Lindquist, W Brent
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Limitations on High Data Rate Optical Fiber Transmission Systems Due to Transmission Impairment

Description: This project supplemented our regular DOE grant from the Basic Energy Sciences organization with the goal of fostering industrial partnerships and student internships. During the project period, we have interacted with between 15 and 20 companies in the optical fiber telecommunications equipment industry, and our students have participated in a number of highly visible projects with companies such as Ciena, Science Applications International Corporation, KDD, ATT, Virtual Photonics, Inc., Phaet… more
Date: March 15, 2002
Creator: Menyuk, Curtis R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Learning from Mistakes --- A Comprehensive Study on Real World Concurrency Bug Characteristics. In the proceedings of the 13th International Conference on Architecture Support for Programming Languages and Operating Systems (ASPLOS'08), March 2008

Description: The reality of multi-core hardware has made concurrent programs pervasive. Unfortunately, writing correct concurrent programs is dif#2;cult. Addressing this challenge requires advances in multiple directions, including concurrency bug detection, concurrent program testing, concurrent programming model design, etc. Designing effective techniques in all these directions will signi#2;cantly bene#2;t from a deep understanding of real world concurrency bug characteristics. This paper provides the #2… more
Date: March 1, 2008
Creator: Park, Yuanyuan Zhou Shan Lu Soyeon
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Properties of Transition Metal Atoms and Ions

Description: Accomplishments of this project include: (1) improvement of the accuracy and efficiency of the RCI methodology to permit it to tackle almost all TM properties, and making good progress in extending these gains to the RE. Our improvements have stimulated improvements in the GRASP package, done by Froese Fischer. RCI efficiency gains are estimated to be {approx} 200x since the start of the project - about 10x from hardware improvements (originally DOE funded) and about 20x from software improveme… more
Date: March 18, 2008
Creator: Donald, Beck, R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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General and Localized Corrosion of Borated Stainless Steels

Description: The Transportation, Aging and Disposal (TAD) canister-based system is being proposed to transport and store spent nuclear fuel at the Monitored Geologic Repository (MGR) located at Yucca Mountain, Nevada. The preliminary design of this system identifies borated stainless steel as the neutron absorber material that will be used to fabricate fuel basket inserts for nuclear criticality control. This paper discusses corrosion test results for verifying the performance of this material manufactured … more
Date: March 1, 2008
Creator: Lister, T. E.; Mizia, Ronald E.; Erickson, A. W.; Trowbridge, T. L. & Matteson, B. S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Coal liquefaction: A research and development needs assessment: Final report, Volume 2

Description: Volume II of this report on an assessment of research needs for coal liquefaction contains reviews of the five liquefaction technologies---direct, indirect, pyrolysis, coprocessing, and bioconversion. These reviews are not meant to be encyclopedic; several outstanding reviews of liquefaction have appeared in recent years and the reader is referred to these whenever applicable. Instead, these chapters contain reviews of selected topics that serve to support the panel's recommendations or to illu… more
Date: March 1, 1989
Creator: Schindler, H. D.; Burke, F. P.; Chao, K. C.; Davis, B. H.; Gorbaty, M. L.; Klier, K. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Spectroscopic and electrochemical studies of selected lanthanides and actinides in concentrated aqueous carbonate and carbonate-hydroxide solutions and in molten dimethyl sulfone

Description: Electrochemical and spectroscopic studies of neptunium, plutonium, americium, californium, and terbium in concentrated aqueous carbonate and carbonate-hydroxide solutions have been carried out. Changes in the absorption spectra of Np(VII), Np(V), Pu(VI), Pu(V), Am(VI), and Am(V) in concentrated Na/sub 2/CO/sub 3/ solution and in the formal potentials of the Np(VI)/Np(V) and Pu(VI)/Pu(V) couples as a function of pH were observed. Heptavalent neptunium in concentrated Na/sub 2/CO/sub 3/ solution … more
Date: March 1, 1985
Creator: Varlashkin, P.G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Application of the SSCTRK numerical simulation program to the evaluation of the SSC magnet aperture

Description: The SSCTRK numerical simulation code has been used to estimate the benefit of increasing the SSC dipole aperture from 4 to 5 cm. The increase in maximum amplitude of stable betatron oscillations depends on the level to which systematic errors have been corrected. Two cases have been studied, a highly corrected ring and a ring with limited corrections. The maximum stable amplitude increase is approximately a factor of the ring with limited systematic corrections. The aperture comparison has been… more
Date: March 1, 1990
Creator: Garavaglia, T.; Kauffmann, S.K. & Stiening, R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Advanced light source master oscillator

Description: The Master Oscillator of the Advanced Light Source operates at a frequency of 499.654 MHz which is the 328th harmonic of the storage ring. The oscillator is capable of providing up to a maximum of {plus minus} 500 KHz frequency deviation for various experimental purposes. Provisions for external signal injection as well as using an external signal source have been designed into the unit. A power distribution system has also been included to provide signals for various parts of the ALS machine a… more
Date: March 1, 1989
Creator: Lo, C.C.; Taylor, B. & Baptiste, K. (Lawrence Berkeley Lab., CA (USA))
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Vacuum system for the LBL Advanced Light Source (ALS)

Description: A 1.5 to 1.9 GeV synchrotron light source is being built at LBL. The vacuum system is designed to permit most synchrotron photons to escape the electron channel and be absorbed in an antechamber. The gas generated by the photons hitting the absorbers in the antechambers will be pumped by titanium sublimation pumps located directly under the absorbers. The electron channel and the antechamber are connected by a 10-mm-high slot that offers good electrodynamic isolation of the two chambers of freq… more
Date: March 1, 1989
Creator: Kennedy, K.; Henderson, T. & Meneghetti, J. (Lawrence Berkeley Lab., CA (USA))
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Scientific Research in the Soviet Union

Description: I report on the scientific aspects of my US/USSR Interacademy Exchange Visit to the Soviet Union. My research was conducted at three different institutes: the Lebedev Physical Institute in Moscow, the Leningrad Nuclear Physics Institute in Gatchina, and the Yerevan Physics Institute in Soviet Armenia. I included relevant information about the Soviet educational system, salaries of Soviet physicists, work habits and research activities at the three institutes, and the relevance of that research … more
Date: March 19, 1990
Creator: Mtingwa, S. K.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Advanced Light Source control system

Description: The Advanced Light Source (ALS) is a third generation 1--2 GeV synchrotron radiation source designed to provide ports for 60 beamlines. It uses a 50 MeV electron linac and 1.5 GeV, 1 Hz, booster synchrotron for injection into a 1--2 GeV storage ring. Interesting control problems are created because of the need for dynamic closed beam orbit control to eliminate interaction between the ring tuning requirements and to minimize orbit shifts due to ground vibrations. The extremely signal sensitive n… more
Date: March 1, 1989
Creator: Magyary, S.; Chin, M.; Cork, C.; Fahmie, M.; Lancaster, H.; Molinari, P. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Progress in the material development of LiCaAlF sub 6 :Cr sup 3+ laser crystals

Description: High Cr{sup 3+} doping levels, up to 8 mole percent, and low losses have been obtained with the tunable solid-state laser material LiCaAlF{sub 6}:Cr{sup 3+} (Cr:LiCAF). Measurements and calculations show that high pumping and extraction efficiencies are possible with the improved material. 13 refs., 4 figs., 1 tab.
Date: March 1, 1990
Creator: Shinn., Michelle D.; Chase, L.L.; Caird, J.A.; Payne, S.A.; Atherton, L.J. & Kway, W.L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

National Synchrotron Light Source guidelines for the conduct of operations

Description: This report briefly discusses the following topics: NSLS operations organization and administration; shift routines and operating practices; NSLS control room activities; communications; control of on-shift training; investigation of abnormal events; notifications; control of equipment and system status; lock-out tagout; independent verification; logkeeping; shift turnover; required reading; shift orders; equipment operations guides; operator aid postings; and equipment labeling.
Date: March 1, 1990
Creator: Fewell, N.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Magnetic field dependence of the specific heat of heavy-fermion YbCu sub 4. 5

Description: The specific heat of a polycrystalline sample of YbCu{sub 4.5} has been measured between 0.3 and 20K in magnetic fields to 7T. At zero field a minimum in C/T is observed near 11K. Below that temperature C/T increases and below 0.5K exhibits an upturn ascribed to a hyperfine contribution. The increase in C/T below 11K is reduced by a factor 1.5 for H = 7T, whereas the hyperfine term is enhanced due to the contribution of the {sup 63}Cu and {sup 65}Cu and nuclei. 5 refs., 3 figs.
Date: March 1, 1990
Creator: Amato, A.; Fisher, R. A.; Phillips, N. E. (Lawrence Berkeley Lab., CA (USA)); Jaccard, D. & Walker, E. (Geneva Univ. (Switzerland). Dept. de Physique de la Matiere Condensee)
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Repetitive Stern-Gerlach Effect

Description: I show that two spin rotators 180{degree} apart may be desirable for the repetitive Stern-Gerlach effect. I also calculate the effect of depolarization resonance on the repetitive Stern-Gerlach effect. It is shown that to first order in resonance strength, we can avoid the imperfection resonance if the energy of the beam is at G{gamma} = n + 1/2. The time available for accumulating the Stern-Gerlach kick is then limited by the intrinsic resonance. 5 refs., 1 fig.
Date: March 13, 1990
Creator: Hsueh, S.-Y.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Study of hot carrier relaxation in quantum wells by subpicosecond Raman scattering

Description: Relaxation of hot carriers excited by subpicosecond laser pulses has been studied by Raman scattering in GaAs/AlAs multiple quantum wells with well widths varying between 100 and 1000 {Angstrom}. The hot phonon population observed by Raman scattering is found to decrease with the well width despite the fact that the hot electron temperature remains constant. The results are explained in terms of confinement of both electrons and optical phonons in quantum wells.
Date: March 1, 1990
Creator: Kim, Dai-sik & Yu, P.Y.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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