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Microwave measurements of electron density in a spherical inertial- electrostatic confinement system using six ion guns

Description: The electron density in a spherical inertial-electrostatic confinement device using six ion beams was studied with microwave techniques involving the fundamental and higher order cavity resonances. Thermal expansion problems were circumvented by switched operation of the device. The deuterium background pressure was found to be a dominant factor in determining n/sub e/ throughout the entire range of 0.4 to 10 milliTorr. With 1 m Torr pressure and 10 mA total ion current (at 20 to 40 keV) central electron densities of the order of 10$sup 9$ electrons/ cm$sup 3$ were estimated, with total population of approximately 10$sup 10$ electrons. No evidence of shell structure of the electron density was found, although the use of higher order modes to obtain better spatial resolution was precluded by the low magnitude of n/sub e/. Indirect indication of weak ion trapping was obtained by measurement of the enhancement of neutron flux that resulted when the guns were operated simultaneously. (auth)
Date: August 1, 1975
Creator: Chan, A.I.Y.
Partner: UNT Libraries Government Documents Department

Measurements of neutron flux from an inertial-electrostatic confinement device

Description: A neutron-detection system was built for the purpose of measuring the neutron flux from an Inertial-Electrostatic Confinement Device located at Brigham Young University. A BF$sub 3$ proportional counter was used for absolute flux measurements and a pair of scintillation detectors was used to compare neutron output under different operating conditions. The detectors were designed to be compatible with the operating conditions of the device and to be able to measure small changes in neutron output. The detectors were calibrated using a Pu-Be source with corrections made for laboratory conditions. Performance of the counting system was checked and data were collected on the neutron flux from the device. (auth)
Date: August 1, 1975
Creator: Westenskow, G.A.
Partner: UNT Libraries Government Documents Department

Improvement and verification of fast reactor safety analysis techniques. Progress report, September 1, 1975--November 31, 1975

Description: A number of improvements and refinements have been made to the VENUS-II analysis of the KIWI-TNT experiment. The final calculations for this study are now being performed. Areas of difference that appeared during the initial VENUS- II/PAD intercomparison study have been investigated and largely resolved. In particular, the treatment of the energy-of-vaporization was examined and found not to have a significant effect on the calculated temperatures. The next round of comparison calculations are currently underway. A study aimed at comparing and evaluating different methods of characterizing work-energy or damage- potential of core-disruptive accidents has been initiated.
Date: January 1, 1975
Creator: Jackson, J. F.
Partner: UNT Libraries Government Documents Department

Improvement and verification of fast reactor safety analysis techniques

Description: An initial analysis of the KIWI-TNT experiment using the VENUS-II disassembly code has been completed. The calculated fission energy release agreed with the experimental value to within about 3 percent. An initial model for analyzing the SNAPTRAN-2 core disassembly experiment was also developed along with an appropriate equation-of-state. The first phase of the VENUS-II/PAD comparison study was completed through the issuing of a preliminary report describing the results. A new technique to calculate a P-V-work curve as a function of the degree of core expansion following a disassembly excursion has been developed. The technique provides results that are consistent with the ANL oxide-fuel equation-of-state in VENUS-II. Evaluation and check-out of this new model are currently in progress. (auth)
Date: January 1, 1975
Creator: Jackson, J.F.
Partner: UNT Libraries Government Documents Department

Acquisition of the ANL 4-MeV electrostatic accelerator. Progress report, September 1, 1974--August 31, 1975

Description: The operation of the ANL 4-MeV accelerator for the reporting period September 1, 1974 through August 31, 1975 is described. Some improvements and modifications to the accelerator and associated equipment are reported, and activities on the three research projects are summarized. An outline of work for the next reporting period indicates a shift from the BYU 2-MeV accelerator to the 4-MeV accelerator to take advantage of the higher beam energy. (auth)
Date: January 1, 1975
Creator: Dixon, D.R. & Hill, M.W.
Partner: UNT Libraries Government Documents Department