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Electromagnetic velocity gauge: use of multiple gauges, time response, and flow perturbations

Description: We have developed an in-situ electromagnetic velocity (EMV) gauge system for use in multiple-gauge studies of initiating and detonating explosives. We have also investigated the risetime of the gauge and the manner in which it perturbs a reactive flow. We report on the special precautions that are necessary in multiple gauge experiments to reduce lead spreading, simplify target fabrication problems and minimize cross talk through the conducting explosive. Agreement between measured stress recor… more
Date: April 8, 1981
Creator: Erickson, L. M.; Johnson, C. B.; Parker, N. L.; Vantine, H. C.; Weingart, R. C. & Lee, R. S.
Partner: UNT Libraries Government Documents Department
open access

Automatic gas-levitation system for vacuum deposition of laser-fusion targets

Description: An improved simple system has been developed to gas-levitate microspheres during vacuum-deposition processes. The automatic operation relies on two effects: a lateral stabilizing force provided by a centering-ring; and an automatically incremented gas metering system to offset weight increases during coating.
Date: September 8, 1981
Creator: Jordan, C. W.; Cameron, G. R.; Krenik, R. M. & Crane, J. K.
Partner: UNT Libraries Government Documents Department
open access

Low-level-signal data acquisition for the MFTF superconducting-magnet system

Description: Acquisition of low level signals from sensors mounted on the superconducting yin-yang magnet in the Mirror Fusion Test Facility (MFTF) imposes very strict requirements on the magnet signal conditioning and data acquisition system. Of the various types of sensors required, thermocouples, strain gages, and voltage taps produce very low level outputs. These low level outputs must be accurately measured in the harsh environment of slowly varying magnetic fields, cryogenic temperatures, high vacuum,… more
Date: October 8, 1981
Creator: Montoya, C.R.
Partner: UNT Libraries Government Documents Department
open access

Copper-coated laser-fusion targets using molecular-beam levitation

Description: A series of diagnostic experiments at the Shiva laser fusion facility required targets of glass microspheres coated with 1.5 to 3.0 ..mu..m of copper. Previous batch coating efforts using vibration techniques gave poor results due to microsphere sticking and vacuum welding. Molecular Beam Levitation (MBL) represented a noncontact method to produce a sputtered copper coating on a single glassmicrosphere. The coating specifications that were achieved resulted in a copper layer up to 3 ..mu..m thi… more
Date: September 8, 1981
Creator: Rocke, M. J.
Partner: UNT Libraries Government Documents Department
open access

Incorporation of chemical kinetic models into process control

Description: An important consideration in chemical process control is to determine the precise rationing of reactant streams, particularly when a large time delay exists between the mixing of the reactants and the measurement of the product. In this paper, a method is described for incorporating chemical kinetic models into the control strategy in order to achieve optimum operating conditions. The system is first characterized by determining a reaction rate surface as a function of all input reactant conce… more
Date: July 8, 1981
Creator: Herget, C.J. & Frazer, J.W.
Partner: UNT Libraries Government Documents Department
open access

Methodology for Comparing the Health Effects of Electricity Generation From Uranium and Coal Fuels

Description: A methodology was developed for comparing the health risks of electricity generation from uranium and coal fuels. The health effects attributable to the construction, operation, and decommissioning of each facility in the two fuel cycle were considered. The methodology is based on defining (1) requirement variables for the materials, energy, etc., (2) effluent variables associated with the requirement variables as well as with the fuel cycle facility operation, and (3) health impact variables f… more
Date: December 8, 1981
Creator: Rhyne, W. R. & El-Bassioni, A. A.
Partner: UNT Libraries Government Documents Department
open access

Some proposed disk-heating and beam-transport experiments for heavy-ion inertial-fusion test facilities

Description: Calculations suggest that experiments relating to beam deposition, focusing and transport can be performed within the context of current design proposals for accelerator test-facilities. Since the test-facilities have lower ion kinetic energy and beam pulse power as compared to reactor drivers, we achieve high-beam intensities at the focal spot by using short focal distance and properly designed beam optics. In this regard, the low beam emittance of suggested multi-beam designs are very useful.… more
Date: June 8, 1981
Creator: Mark, J. W. K.; Bangerter, R. O.; Fawley, W. M.; Yu, S. & Wang, T. S. F.
Partner: UNT Libraries Government Documents Department
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