Office of Scientific & Technical Information Technical Reports - 13 Matching Results

Search Results

Results: 1 - 13
open access

Analysis of measurements of the thermal conductivity of liquid urania

Description: An analysis was performed of the three existing measurements of the thermal conductivity and thermal diffusivity of molten uranium dioxide. A transient heat transfer code (THTB) was used for this analysis. A much smaller range of values for thermal conductivity than originally reported was found: the original values ranged from 2.4 to 11 W . m/sup -1/ . K/sup -1/, with a mean of 7.3 W . m/sup -1/ . K/sup -1/, whereas the recalculated values ranged from 4.5 to 6.75 W . m/sup -1/ . K/sup -1/, wit… more
Date: September 17, 1984
Creator: Fink, J.K. & Leibowitz, L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Antiproton Yield Diagnostics for the Tevatron I Debuncher

Description: During start-up of the CERN AA, many hours of machine experiments went into the study and optimization of antiproton yields. Those involved in the commissioning programme experienced the difficulty of tuning a new machine to accept a low-intensity full-aperture beam. The antiproton yield could only be obtained by integrating a slow Schottky scan of the beam on the injection orbit, normalized with respect to primary beam intensity by a charge transformer just in front of the production target. A… more
Date: October 17, 1984
Creator: Johnson, C. D. & Hojvat, C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Basic and heavy ion scattering in time dependent Hartree-Fock Theory

Description: Time Dependent Hartree-Fock theory, TDHF, is the most sophisticated, microscopic approach to nuclear dynamics yet practiced. Although it is far from a description of nature it does allow us to examine multiply interactive many-body systems semi quantum mechanically and to visualize otherwise covert processes. Some of the properties of the TDHF equations are stated leaving the interested reader to one of several excellent review articles for the derivations. Some of the applications to the colli… more
Date: May 17, 1984
Creator: Weiss, M.S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Microalgae Production Cost Analysis: Development of Goals And Its Implications On Future Research

Description: This paper presents an overview of the production and economic models, with specific discussion of input assumptions used to derive microalgae product costs for the state of the art, theoretical-best and for the 1994 attainability target. These product cost estimates form the basis for developing program cost goals for microalgae fuel technology.
Date: January 17, 1984
Creator: Hill, A. M. & McIntosh, R. P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Nonrelativistic theory of heavy-ion collisions

Description: A wide range of phenomena is observed in heavy-ion collisions, calling for a comprehensive theory based on fundamental principles of many-particle quantum mechanics. At low energies, the nuclear dynamics is controlled by the mean field, as we know from spectroscopic nuclear physics. We therefore expect the comprehensive theory of collisions to contain mean-field theory at low energies. The mean-field theory is the subject of the first lectures in this chapter. This theory can be studied quantum… more
Date: July 17, 1984
Creator: Bertsch, G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Notes on the rf system for the SLC positron source

Description: The proposed arrangement of accelerator structures, waveguide feeds and klystrons is shown. A 50 MW klystron at 20-3C will provide power for the high-field capture section immediately following the target. About 1 meter downstream of this section there will be a standard girder of four 3.05-meter SLAC constant gradient accelerator sections. These will be powered by a klystron at station 20-3D. Current thinking is that this will also be a 50 MW tube, but 35 MW might well be sufficient. Both stat… more
Date: October 17, 1984
Creator: Hoag, H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Physics implications of oxide and metal fuel on the design of small LMFBR cores

Description: Slower growth projections in the demand for electricity and advances in metal fuel technology have shifted some of the emphasis in fast reactor development in the US from large oxide cores to small cores and also renewed interest in metal fuel. Cores constrained by diameter and fuel burnup exhibit many similar neutronic performance characteristics. However, some parameters such as reactivity coefficients, for example, are very different. The physics parameters of the four cores studied suggest … more
Date: September 17, 1984
Creator: Orechwa, Y. & Khalil, H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Theoretical studies in tandem mirror physics

Description: Recent developments in six areas of tandem-mirror theory are explored. Specifically, FLR terms (including electric-field drift) have been added to our 3-D paraxial MHD equilibrium code. Our low-frequency MHD stability analysis with FLR, which previously included only m/sub theta/ = 1 rigid perturbations, has been extended to incorporate moderate m/sub theta/, rotational drive, finite-beta effects on wall stabilization, and the well-digging effect of energetic electrons by using three computatio… more
Date: July 17, 1984
Creator: Cohen, R. H.; Auerbach, S. P.; Baldwin, D. E.; Byers, J. A.; Chen, Y. J.; Cohen, B. I. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Time dependent Hartree-Fock theory: special applications

Description: Some TDHF applications are addressed that are somewhat subtler than just crashing nuclei together and looking at large chunks of nuclear material. I will also attempt to address some of the technical problems of doing TDHF and also point out some areas where work remains to be done. Topics include promptly emitted particles, large amplitude RPA, and exciting giant resonances in heavy ion collisions. 19 references. (WHK)
Date: May 17, 1984
Creator: Weiss, M.S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Workshop report on new directions in soft x-ray photoabsorption

Description: The Workshop Report integrates what was said at the Workshop on New Directions in Soft X-Ray Photoabsorption, which focused on the region from 100 eV to 10 keV. The report clarifies the current state of theory and experiment and identifies the opportunities which new theoretical methods and experimental facilities could be expected to provide. The understanding of photoabsorption (which requires experimental photoabsorption cross section data) is a key to understanding the properties and behavi… more
Date: September 17, 1984
Creator: Bartlett, R.; Del Grande, N.K.; Lindau, I.; Manson, S.; Merts, A.L. & Pratt, R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

X-ray microprobe characterization of materials: the case for undulators on advanced storage rings

Description: The unique properties of X rays offer many advantages over electrons and other charged particles for the microcharacterization of materials. X rays are more efficient in exciting characteristic X-ray fluorescence and produce higher fluorescent signals to backgrounds than obtained with electrons. Detectable limits for X rays are a few parts per billion and are 10/sup -3/ to 10/sup -5/ less than for electrons. Energy deposition in the sample by X rays is 10/sup -3/ to 10/sup -4/ less than for ele… more
Date: March 17, 1984
Creator: Sparks, C.J. Jr.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
Back to Top of Screen