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Heat-exchanger concepts for neutral-beam calorimeters

Description: Advanced cooling concepts that permit the design of water cooled heat exchangers for use as calorimeters and beam dumps for advanced neutral beam injection systems were evaluated. Water cooling techniques ranging from pool boiling to high pressure, high velocity swirl flow were considered. Preliminary performance tests were carried out with copper, inconel and molybdenum tubes ranging in size from 0.19 to 0.50 in. diameter. Coolant flow configurations included (1) smooth tube/straight flow, (2)… more
Date: October 5, 1981
Creator: Thompson, C.C.; Polk, D.H.; McFarlin, D.J. & Stone, R.
Partner: UNT Libraries Government Documents Department
open access

Feasibility study of a fission supressed blanket for a tandem-mirror hybrid reactor

Description: A study of fission suppressed blankets for the tandem mirror not only showed such blankets to be feasible but also to be safer than fissioning blankets. Such hybrids could produce enough fissile material to support up to 17 light water reactors of the same nuclear power rating. Beryllium was compared to /sup 7/Li for neutron multiplication; both were considered feasible but the blanket with Li produced 20% less fissile fuel per unit of nuclear power in the reactor. The beryllium resource, while… more
Date: October 5, 1981
Creator: Moir, R. W.; Lee, J. D. & Barr, W. L.
Partner: UNT Libraries Government Documents Department
open access

Notification of change in a data base

Description: The Supervisory Control and Diagnostics System for the Mirror Fusion Test Facility is an event driven system; tasks that handle specific events are active only when those events occur. One method of monitoring and generating events is the data base notification facility; a task can request that it be loaded and started by the dbms if a data element is touched or goes outside of a specified range. The motivations for this facility (along with an example of its use and some specifics regarding ho… more
Date: October 5, 1981
Creator: Nelson, B.C.
Partner: UNT Libraries Government Documents Department
open access

Psuedo-3D, isodensity and density profiles from fiber optic output of a MACH-130 air shock

Description: A modified Voitenko compressor generated a Mach-130 air shock in an outlet pipe open to the atmosphere. Fiber optics transmitted luminosity associated with propagation of the air shock to an external display board, which was scanned with a high-speed streaking camera. We describe the computerized microdensitometer scanning technique for converting the film records to pseudo-3D, isodensity, and density profiles. The isodensity contours can be displayed using different colors to facilitate analys… more
Date: June 5, 1981
Creator: Dittmore, C.H. & Glenn, H.D.
Partner: UNT Libraries Government Documents Department
open access

TMX-Upgrade neutral-beam injection system

Description: The TMX experiment proved that axial confinement of central-cell ions is improved ninefold by the electrostatic potential of end-cell plasmas. The TMX Upgrade task is to improve this confinement further. This paper discusses the injector system aspects of the TMX Upgrade.
Date: October 5, 1981
Creator: Felker, B.; Kane, R. J.; Wong, R. L.; Calderon, M. O. & Moore, T. L.
Partner: UNT Libraries Government Documents Department
open access

Low energy x-ray spectrometer

Description: A subkilovolt spectrometer has been produced to permit high-energy-resolution, time-dependent x-ray intensity measurements. The diffracting element is a curved mica (d = 9.95A) crystal. To preclude higher order (n > 1) diffractions, a carbon x-ray mirror that reflects only photons with energies less than approx. 1.1 keV is utilized ahead of the diffracting element. The nominal energy range of interest is 800 to 900 eV. The diffracted photons are detected by a gold-surface photoelectric diode de… more
Date: June 5, 1981
Creator: Woodruff, W. R.
Partner: UNT Libraries Government Documents Department
open access

Central cell confinement in MFTF-B

Description: The point code TANDEM has been used to survey the range of plasma parameters which can be attained in MFTF-B. The code solves for the electron and ion densities and temperatures in the central cell, yin-yang, barrier, and A-cell regions as well as the plasma potential in each region. In these studies, the A-cell sloshing ion beams were fixed while the neutral beams in the yin-yang and central cell, the gas feed in the central cell, and the applied ECRH power ..beta.., central cell ion density a… more
Date: May 5, 1981
Creator: Jong, R.A.
Partner: UNT Libraries Government Documents Department
open access

Agriculture, greenhouse, wetland and other beneficial uses of geothermal fluids and heat

Description: The status for related beneficial uses including agriculture, greenhousing, and geothermal wetlands is presented. Data published for the geothermal fluids found in areas of China have been examined and compared with the geothermal fluids used in the agriculture evaluations in the United States. This comparison indicates that the geothermal fluids found in parts of China are similar to those used in the US agriculture experiments. Greenhousing is addressed largely from the standpoint of hardware… more
Date: April 5, 1981
Creator: Schmitt, R. C.
Partner: UNT Libraries Government Documents Department
open access

Effects due to the large ambipolar potential in TMX

Description: The large potentials and potential gradients in tandem mirrors have several effects. Some of these are discussed, together with supporting data from TMX. These include: azimuthal averaging by the E x B rotation, reduction of radial outward drifts (from high order multipoles) by the rapid E x B azimuthal velocity, neoclassical-resonant diffusion, Joule heating of central cell ions due to non-ambipolar transport in the radial electric field, low frequency instabilities, and differences between th… more
Date: May 5, 1981
Creator: Hooper, E. B. Jr.; Allen, S. L. & Coakley, P.
Partner: UNT Libraries Government Documents Department
open access

Ambipolar potential formation in TMX

Description: TMX experimental data on ambipolar potential control and on the accompanying electrostatic confinement are reported. New results on the radial dependence of the central-cell confining potential are given. Radial and axial particle losses as well as scaling of the central-cell axial confinement are discussed.
Date: May 5, 1981
Creator: Correll, D. L.; Allen, S. L. & Casper, T. A.
Partner: UNT Libraries Government Documents Department
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