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30
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Comments on septa and other small production angle magnets
A discussion is given of possible septum magnet parameters for small production angle experiments in the ISABELLE storage rings. Superconducting septa and torroidal septa are also considered. (PMA)
Date:
August 25, 1977
Creator:
Allinger, J.; Danby, G. & Jackson, J.
Object Type:
Article
System:
The UNT Digital Library
Fire protection countermeasures for containment ventilation systems
The goal of this project is to find countermeasures to protect High Efficiency Particulate Air (HEPA) filters, in exit ventilation ducts, from the heat and smoke generated by fire. Initially, methods were developed to cool fire-heated air by fine water spray upstream of the filters. It was recognized that smoke aerosol exposure to HEPA filters could also cause disruption of the containment system. Through testing and analysis, several methods to partially mitigate the smoke exposure to the HEPA filters were identified. A continuous, movable, high-efficiency prefilter using modified commercial equipment was designed. The technique is capable of protecting HEPA filters over the total time duration of the test fires. The reason for success involved the modification of the prefiltration media. Commercially available filter media has particle sorption efficiency that is inversely proportional to media strength. To achieve properties of both efficiency and strength, rolling filter media were laminated with the desired properties. The approach was Edisonian, but truncation in short order to a combination of prefilters was effective. The application of this technique was qualified, since it is of use only to protect HEPA filters from fire-generated smoke aerosols. It is not believed that this technique is cost effective in …
Date:
August 25, 1980
Creator:
Alvares, N.; Beason, D.; Bergman, V.; Creighton, J.; Ford, H. & Lipska, A.
Object Type:
Report
System:
The UNT Digital Library
Spectrographic Determination of Impurities in Hafnium
A spectrographic method using d-c arc excitation in a controlled atmosphere was developed to analyze for seven impurity elements in radioactive hafnium samples. Analysis requires as little as 35 mg of hafnium oxide. (auth)
Date:
August 25, 1961
Creator:
Ginther, B. E. & Wheeler, G. V.
Object Type:
Report
System:
The UNT Digital Library
Viewgraph notes: geologic aspects of terminal storage of radioactive wastes
This document contains copies of viewgraphs discussed in a presentation made at the Fifth Annual Power Conference, August 29 to September 2, 1977. No text. 19 figures, 11 references.
Date:
August 25, 1977
Creator:
Lomenick, T.F.
Object Type:
Article
System:
The UNT Digital Library
Hybrid simulations of quasineutral phenomena in magnetized plasma
A new class of numerical algorithms for computer simulation of low frequency electromagnetic and electrostatic phenomena in magnetized plasma is presented. Maxwell's equations are solved in the limits of quasineutrality and negligible transverse displacement current (Darwin's model). Electrons are modeled as a fluid with polarization effects ignored. Ions are described as particles. A novel feature of these algorithms is the use of the electron fluid equation of motion to determine the electric field, which renders these numerical schemes remarkably simple and direct. The simulation plasma is either periodic or bounded by particle reflecting conducting walls. Both fully nonlinear codes with spatial grids and linearized gridless codes have been implemented.
Date:
August 25, 1977
Creator:
Byers, J.A.; Cohen, B.I.; Condit, W.C. & Hanson, J.D.
Object Type:
Report
System:
The UNT Digital Library
10-MWe pilot-plant-receiver panel test requirements document solar thermal test facility
Testing plans for a full-scale test receiver panel and supporting hardware which essentially duplicate both physically and functionally, the design planned for the Barstow Solar Pilot Plant are presented. Testing is to include operation during normal start and shutdown, intermittent cloud conditions, and emergencies to determine the panel's transient and steady state operating characteristics and performance under conditions equal to or exceeding those expected in the pilot plant. The effects of variations of input and output conditions on receiver operation are also to be investigated. Test hardware are described, including the pilot plant receiver, the test receiver assembly, receiver panel, flow control, electrical control and instrumentation, and structural assembly. Requirements for the Solar Thermal Test Facility for the tests are given. The safety of the system is briefly discussed, and procedures are described for assembly, installation, checkout, normal and abnormal operations, maintenance, removal and disposition. Also briefly discussed are quality assurance, contract responsibilities, and test documentation. (LEW)
Date:
August 25, 1978
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Hybrid charged-particle guide for studying (n, charged particle) reactions
Charged-particle transport systems consisting of magnetic quadrupole lenses have been employed in recent years in the study of (n, charged particle) reactions. We have completed a new transport system that is based both on magnetic lenses as well as electrostatic fields. The magnetic focusing of this charged-particle guide is provided by six magnetic quadrupole lenses arranged in a CDCCDC sequence (in the vertical plane). The electrostatic field is produced by a wire at high voltage which stretches the length of the guide and is physically at the center of the magnetic axis. The magnetic lenses are used for charged particles above 5 MeV; the electrostatic guide is used for lower energies. This hybrid system possesses the excellent focusing and background rejection properties of other magnetic systems. For low energy charged-particles, the electrostatic transport avoids the narrow band-passes in charged-particle energy which are a problem with purely magnetic transport systems. This system is installed at the LLNL Cyclograaff facility for the study of (n, charged particle) reactions at neutron energies up to 35 MeV.
Date:
August 25, 1982
Creator:
Haight, R. C.; White, R. M. & Zinkle, S. J.
Object Type:
Article
System:
The UNT Digital Library
Supernovae, compact stars and nuclear physics
We briefly review the current understanding of supernova. We investigate the implications of rapid rotation corresponding to the frequency of the new pulsar reported in the supernovae remnant SN1987A. It places very stringent conditions on the equation of state if the star is assumed to be bound by gravity alone. We find that the central energy density of the star must be greater than 12 times that of nuclear density to be stable against the most optimistic estimate of general relativistic instabilities. This is too high for the matter to plausibly consist of individual hadrons. We conclude that the newly discovered pulsar, if its half-millisecond signals are attributable to rotation, cannot be a neutron star. We show that it can be a strange quark star, and that the entire family of strange stars can sustain high rotation under appropriate conditions. We discuss the conversion of a neutron star to strange star, the possible existence of a crust of heavy ions held in suspension by centrifugal and electric forces, the cooling and other features. 39 refs., 8 figs., 2 tabs.
Date:
August 25, 1989
Creator:
Glendenning, N.K.
Object Type:
Article
System:
The UNT Digital Library
An Evaluation of the Krieger-Nelkin Method From Calculations of Slow Neutron Scattering by CH$sub 4$
None
Date:
August 25, 1961
Creator:
McMurry, H. L.; Griffing, G. W.; Hestir, W. A. & Gannon, L. J.
Object Type:
Report
System:
The UNT Digital Library
Mirror theory applied to toroidal systems
Central features of a mirror plasma are strong departures from Maxwellian distribution functions, ambipolar potentials and densities which vary along a field line, and losses, and the mirror field itself. To examine these features, mirror theorists have developed analytical and numerical techniques to solve the Fokker-Planck equation, evaluate the potentials consistent with the resulting distribution functions, and assess the microstability of these distributions. Various combinations of mirror-plasma fetures are present and important in toroidal plasmas as well, particularly in the edge region and in plasmas with strong r.f. heating. In this paper we survey problems in toroidal plasmas where mirror theory and computational techniques are applicable, and discuss in more detail three specific examples: calculation of the toroidal generalization of the Spitzer-Haerm distribution function (from which trapped-particle effects on current drive can be calculated), evaluation of the nonuniform potential and density set up by pulsed electron-cyclotron heating, and calculation of steady-state distribution functions in the presence of strong r.f. heating and collisions. 37 refs., 3 figs.
Date:
August 25, 1987
Creator:
Cohen, R.H.
Object Type:
Article
System:
The UNT Digital Library
Executive Correspondence – Letter dtd 08/21/2005 to all Commissioner from John Yates
Executive Correspondence – Letter dtd 08/21/2005 to all Commissioner from John Yates, Director of the Pittsburgh Surface Science Center expressing his support for Army Research Office.
Date:
August 25, 2005
Creator:
unknown
Object Type:
Letter
System:
The UNT Digital Library
Executive Correspondence – Letter dtd 08/23/2005 to Chairman Principi from Michael Wynne
Executive Correspondence – Letter dtd 08/23/2005 to Chairman Principi from Michael Wynne forwarding the DoD’s responses to questions for the record supporting the Department’s testimony before the Commission on August 20, 2005.
Date:
August 25, 2005
Creator:
United States. Department of Defense.
Object Type:
Letter
System:
The UNT Digital Library
Executive Correspondence – Letter dtd 08/23/2005 to Chairman Principi from Patrick O’Brien
Executive Correspondence – Letter dtd 08/23/2005 to Chairman Principi from Patrick O’Brien, Director of the Office of Economic Adjustment, attaching his response to the question that was asked of him when he testified before the Commission on 08/11/2005.
Date:
August 25, 2005
Creator:
United States. Department of Defense.
Object Type:
Letter
System:
The UNT Digital Library
Community Correspondence - DFAS Cleveland
Community Correspondence – 300+ signatures supporting DFAS Cleveland
Date:
August 25, 2005
Creator:
unknown
Object Type:
Letter
System:
The UNT Digital Library
Coalition Correspondence – Letter dtd 08/22/2005 to Chairman Principi from Ronald Merritt
Coalition Correspondence – Letter dtd 08/22/2005 to Chairman Principi from Ronald Merritt, President DeTect, Inc. regarding safety issues at NAS Oceana and NAS Cecil Field.
Date:
August 25, 2005
Creator:
unknown
Object Type:
Letter
System:
The UNT Digital Library
50 letters from citizens upset by the recommendation to close the Niagara Falls Air Force Reserve and Guard Base
Community Correspondence - 50 letters from citizens upset by the recommendation to close the Niagara Falls Air Force Reserve and Guard Base
Date:
August 25, 2005
Creator:
unknown
Object Type:
Letter
System:
The UNT Digital Library
Letter from a concerned citizen asking to consider keeping the 911th Tactical Airlift Wing
Community Correspondence - Letter from a concerned citizen asking to consider keeping the 911th Tactical Airlift Wing
Date:
August 25, 2005
Creator:
unknown
Object Type:
Letter
System:
The UNT Digital Library
Letter from a citizen who would like to keep DFAS and Rome Lab open
Letter from a citizen who would like to keep DFAS and Rome Lab open
Date:
August 25, 2005
Creator:
unknown
Object Type:
Letter
System:
The UNT Digital Library
Article sent in by an individual: "War Games Seen as 'Message' "
Community Correspondence - Article sent in by an individual: "War Games Seen as 'Message' "
Date:
August 25, 2005
Creator:
unknown
Object Type:
Text
System:
The UNT Digital Library
Individual Letters from citizens urging the Commission to reconsider the recommendation to re-align work from NSWC Crane
Community Correspondence - Individual Letters from citizens urging the Commission to reconsider the recommendation to re-align work from NSWC Crane
Date:
August 25, 2005
Creator:
unknown
Object Type:
Letter
System:
The UNT Digital Library
Individual Letters from citizens urging the BRAC to remove the Armed Forces Institute of Pathology from the list
Community Correspondence - Individual Letters from citizens urging the BRAC to remove the Armed Forces Institute of Pathology from the list
Date:
August 25, 2005
Creator:
unknown
Object Type:
Letter
System:
The UNT Digital Library
Letter from an individual expressing his thoughts about the recommendation to close Eglin Air Force Base in NW Florida
Community Correspondence - Letter from an individual expressing his thoughts about the recommendation to close Eglin Air Force Base in NW Florida
Date:
August 25, 2005
Creator:
unknown
Object Type:
Letter
System:
The UNT Digital Library
Petition from citizens of New Jersey urging the Commission to Save Fort Monmouth
Community Correspondence - Petition from citizens of New Jersey urging the Commission to Save Fort Monmouth
Date:
August 25, 2005
Creator:
unknown
Object Type:
Legal Document
System:
The UNT Digital Library
State Input - Rock Island Arsenal, IA/IL Community Presentation - June 20, 2005
State Input - Rock Island Arsenal, IA/IL Community Presentation - June 20, 2005 - Includes: Statement, Supporting Docs, map, and Community Briefings
Date:
August 25, 2005
Creator:
unknown
Object Type:
Text
System:
The UNT Digital Library