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Access control system for ISABELLE

Description: An access system based on the one now in operation at the CERN ISR is recommended. Access doors would presumably be located at the entrances to the utility tunnels connecting the support buildings with the ring. Persons requesting access would insert an identity card into a scanner to activate the system. The request would be autologged, the keybank adjacent to the door would be unlocked and ISABELLE operations would be notified. The operator would then select the door, activating a TV-audio li… more
Date: August 17, 1977
Creator: Potter, K. & Littenberg, L.
Partner: UNT Libraries Government Documents Department
open access

Prototype photon position monitors for undulator beams at the Advanced Light Source

Description: Design criteria are described, and test results are presented, for prototype ALS undulator beam position monitors. The design is based on monitors presently in use at NSLS, with modifications to account for the widely varying and large K values of the undulators to be installed at the ALS. In particular, we have modified the design to simplify the thermal engineering and we have explored techniques to suppress the response of the monitors to soft photons, so that the beam position can be determ… more
Date: October 17, 1990
Creator: Warwick, T.; Shu, D. (Lawrence Berkeley Lab., CA (United States)); Rodricks, B. (Argonne National Lab., IL (United States)) & Johnson, E.D. (Brookhaven National Lab., Upton, NY (United States))
Partner: UNT Libraries Government Documents Department
open access

Optical components for the Nova laser

Description: In addition to its other characteristics, the Nova Laser Fusion facility may well be the largest precision optical project ever undertaken. Moreover, during the course of construction, concurrent research and development has been successfully conducted, and has resulted in significant advances in various technical areas, including manufacturing efficiency. Although assembly of the first two beams of Nova is just commencing, the optical production, including construction of the special facilitie… more
Date: May 17, 1982
Creator: Wallerstein, E.P.; Baker, P.C. & Brown, N.J.
Partner: UNT Libraries Government Documents Department
open access

Auger study of surface carbon and oxygen on thorium following ion bombardment

Description: The composition of a thorium metal surface has been monitored using Auger electron spectroscopy following Ar/sup +/ bombardment at different temperatures. After extended Ar/sup +/ bombardment, enough contaminated overlayers were removed to expose a surface region containing only thorium, bulk impurities, and imbedded argon. The main impurities, carbon and oxygen, differed in their behavior when the sample was annealed following bombardment. The amount of surface carbon either increased or remai… more
Date: November 17, 1977
Creator: Bastasz, R. & Colmenares, C.
Partner: UNT Libraries Government Documents Department
open access

Models for Type I supernovae

Description: Two rather disjoint scenarios for Type I supernovae are presented. One is based upon mass accretion by a white dwarf in a binary system. The second involves a star having some 8 to 10 times the mass of the sun which may or may not be a solitary star. Despite the apparent dissimilarities in the models it may be that each occurs to some extent in nature for they both share the possibility of producing substantial quantities of /sup 56/Ni and explosions in stars devoid of hydrogen envelopes. These… more
Date: June 17, 1980
Creator: Woosley, S. E.; Weaver, T. A. & Taam, R. E.
Partner: UNT Libraries Government Documents Department
open access

A high-fluence fusion neutron source

Description: A conceptual design of a D-T fusion facility for continuous production of 14-MeV neutron wall loading from 5 to 10 MW/m/sup 2/ at the plasma surface is presented. In this design, D-T neutrons are produced in a linear, two-component plasma formed by neutral beam irradiation of a fully ionized warm plasma target. The beam energy, which is deposited in the center, is transferred to the warm plasma mainly by electron drag and is conducted along the target plasma column to end regions where it is ab… more
Date: February 17, 1988
Creator: Coensgen, F. H.; Casper, T. A.; Correll, D. L.; Damm, C. C.; Futch, A. H.; Logan, B. G. et al.
Partner: UNT Libraries Government Documents Department
open access

Stimulated Raman scatter in laser fusion target chambers

Description: The target chamber of a laser fusion reactor will contain small amounts of background gases. As the beam is focused, it ionizes the gas and Raman scattering is induced. Density limits on the background gas are found in order that the laser beam will not become appreciably decollimated. It is found that laser bandwidth efficiently decreases the scattering effect.
Date: October 17, 1977
Creator: Thomson, J.J.
Partner: UNT Libraries Government Documents Department
open access

Control of radioactive material transport in sodium-cooled reactors

Description: The Radioactivity Control Technology (RCT) program was established by the Department of Energy to develop and demonstrate methods to control radionuclide transport to ex-core regions of sodium-cooled reactors. This radioactive material is contained within the reactor heat transport system with any release to the environment well below limits established by regulations. However, maintenance, repair, decontamination, and disposal operations potentially expose plant workers to radiation fields ari… more
Date: March 17, 1980
Creator: Brehm, W. F.
Partner: UNT Libraries Government Documents Department
open access

Radioactive gas and hydrogen removal after a LOCE at the LOFT Facility

Description: The use of a silver-zeolite halogen adsorber placed in series with a hydrogen catalytic recombiner and a cryogenic noble gas adsorber assembly constitutes a waste gas processing system (WGPS) capable of handling hydrogen and fission product gases following a Loss-of-Coolant Experiment (LOCE). This paper describes: the types and quantities of gases expected to be found at the facility after a failed-fuel LOCE; the purpose of the WGPS; and the general configuration and expected decontamination fa… more
Date: December 17, 1979
Creator: McCormick-Barger, J.W. & Sumpter, K.C.
Partner: UNT Libraries Government Documents Department
open access

Methodology for assessing the potential impact on air quality resulting from geothermal resource development in the Imperial Valley

Description: Methodology in use in the Imperial Valley for assessing the potential impact on air quality that may result from the development of geothermal resources is discussed. The installation of a network of air quality stations for characterizing the air quality and atmospheric transport properties in the valley prior to development is discussed. Analyses of geothermal fluids for various gases are performed to evaluate the potential emission rates from future geothermal power plants. The principal pol… more
Date: October 17, 1977
Creator: Gudiksen, P. H.; Axelrod, M. C.; Ermak, D. L.; Lamson, K. C. & Lange, R.
Partner: UNT Libraries Government Documents Department
open access

Mechanical design for TMX injector system

Description: The injector system for the Tandem Mirror Experiment (TMX) contains the components required to create and maintain a high-temperature, high-density plasma. These components include a streaming-plasma gun in each of the plug tanks to form the target-plasma, 24 neutral-beam source modules for injecting neutral deuterium atoms to heat and replace losses from the plasma, and a gas box system that applies a streaming cold gas to the plasma to stabilize it. This paper discusses the mechanical design … more
Date: October 17, 1977
Creator: Calderon, M.O.; Chen, F.F.K. & Denhoy, B.S.
Partner: UNT Libraries Government Documents Department
open access

Early Admission to College for Bright Students

Description: Article discussing the early admission to college programs, including the Texas Academy of Mathematics and Science.
Date: May 17, 1989
Creator: Cromer, Alan
Partner: Texas Academy of Mathematics and Science
open access

Monopole strength as a probe of nuclear shape mixing

Description: The monopole strength, MS, within a single set of nuclear shape excitations is compared with the MS between different shapes. After misconceptions are pointed out concerning the spin dependence of B(E2) values, MS properties are juxtaposed with gamma-ray and beta-decay properties of /sup 70/Se, /sup 96/Zr, /sup 102/Pd, and the N = 60 isotones to illustrate the utility of combined investigations and evidence is given for the observation of a two-phonon octupole multiplet. Finally, consideration … more
Date: August 17, 1987
Creator: Meyer, R.A.
Partner: UNT Libraries Government Documents Department
open access

Hadronic production of J/sup PC/ = 2/sup + +/ glueballs

Description: An OZI suppressed channel with variable mass, namely the reaction ..pi../sup -/p ..-->.. phi phi n, has been used as a filter which allows resonating gluons or glueballs to pass, while strongly rejecting conventional quark-built hadronic states. The breakdown of the OZI suppression signals a glueball. Glueball mass and particle width estimates are discussed. Reasons why g/sub T/'s have not been seen in other channels, particularly the decay of J/psi, are considered. 34 refs., 9 figs. (LEW)
Date: March 17, 1986
Creator: Lindenbaum, S. J.
Partner: UNT Libraries Government Documents Department
open access

Liquid nitrogen cooled liners for 2XIIB

Description: Liquid-nitrogen-cooled liners have been installed in the neutral-beam source tanks of 2XIIB. The installation has resulted in improvements in vacuum pumping, although testing is not complete. The liners are stainless-steel-flooded-type liners, using spot-welded-and-inflation construction. The natural-convection flow system must keep the liners cold during the high heat loads imposed during Ti gettering.
Date: October 17, 1977
Creator: Atkinson, D.P. & Calderon, M.O.
Partner: UNT Libraries Government Documents Department
open access

Comparison of theory and simulations with recent laser plasma experiments

Description: In the past few months, detailed experimental data have become available on laser light absorption versus angle, plasma density profiles near the critical surface, and stimulated scattering processes. In the light of these experiments, it seems timely to reassess our theoretical understanding of these phenomena. A quantitative comparison of the data with current results of plasma simulations and theory is presented and the areas where further theoretical effort is called for are pointed out. Th… more
Date: October 17, 1977
Creator: Max, C.E.
Partner: UNT Libraries Government Documents Department
open access

ICF diagnostics. Revision 1

Description: In the past several years there have been significant advances and accomplishments in the field of Inertial Confinement Fusion (ICF) research which are directly attributable to an active experimental program supported by the development and applications of sophisticated and specialized diagnostics instruments and techniques. The continued development of high temporal-and spatial-resolution diagnostics, although with a somewhat different technical emphasis than previously, is essential for maint… more
Date: December 17, 1982
Creator: Coleman, L.W.
Partner: UNT Libraries Government Documents Department
open access

Quantum measurement and the mind-brain connection

Description: It is argued that quantum measurements do pose a problem, within the context created by the fundamental aim of science, which is identified as the construction of a cohesive, comprehensive, and rationally coherent idea of the nature of the world in which we live. Models of nature are divided into two classes: (1), those in which there is a selection process that, for any possible measurement, would, if that measurement were to be performed, pick out one single outcome, and, (2), all others. It … more
Date: October 17, 1990
Creator: Stapp, Henry P.
Partner: UNT Libraries Government Documents Department
open access

Mixed waste treatment with a mediated electrochemical process

Description: The process described in this paper is intended to convert mixed waste containing toxic organic compounds (not heavy metals) to ordinary radioactive waste, which is treatable. The process achieves its goal by oxidizing hydrocarbons to CO{sub 2} and H{sub 2}O. Other atoms that may be present in the toxic organic generally are converted to nonhazardous anions such as sulfate and phosphate. This electro chemical conversion is performed at conditions of temperature and pressure that are just modera… more
Date: May 17, 1991
Creator: Hickman, R. G.; Gray, L. W. & Chiba, Z.
Partner: UNT Libraries Government Documents Department
open access

Operation of a Free-Electron Laser from the Extreme Ultraviolet to the Water Window

Description: We report results on the performance of a free-electron laser operating at a wavelength of 13.7 nm where unprecedented peak and average powers for a coherent extreme-ultraviolet radiation source have been measured. In the saturation regime, the peak energy approached 170 {micro}J for individual pulses, and the average energy per pulse reached 70 {micro}J. The pulse duration was in the region of 10 fs, and peak powers of 10 GW were achieved. At a pulse repetition frequency of 700 pulses per seco… more
Date: December 17, 2007
Creator: Ackermann, W.; Asova, G.; Ayvazyan, V.; Azima, A.; Baboi, N.; Bahr, J. et al.
Partner: UNT Libraries Government Documents Department
open access

Statistical characterization of dislocation ensembles

Description: We outline a method to study the spatial and orientation statistics of dynamical dislocation systems by modeling the dislocations as a stochastic fiber process. Statistical measures have been introduced for the density, velocity, and flux of dislocations, and the connection between these measures and the dislocation state and plastic distortion rate in the crystal is explained. A dislocation dynamics simulation model has been used to extract numerical data to study the evolution of these statis… more
Date: May 17, 2006
Creator: El-Azab, A.; Deng, J. & Tang, M.
Partner: UNT Libraries Government Documents Department
open access

PROPERTIES OP LIQUID HELIUM-THREE IN THE TWO-BODY CORRELATION APPROXIMATION. I

Description: This is the first of two papers in which the low-temperature properties of liquid He{sup 3} are to be calculated in the thermodynamically consistent 'T-matrix' approximation. The set of coupled integral equations which are to be solved is exhibited in Part A of this paper. Part B of this paper is devoted to a preliminary, zero-temperature calculation which employs the additional approximations of using separable potentials and a noninteracting spectral function to define the interaction of two … more
Date: November 17, 1965
Creator: Beck, Donald E. & Sessler, Andrew M.
Partner: UNT Libraries Government Documents Department
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