70 Matching Results

Search Results

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: Correl, D.L.; Allen, S.L. & Casper, T.A.
Partner: UNT Libraries Government Documents Department

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

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 analysis. This technique can achieve resolutions of 1 ns and 2 ..mu..m. We give examples of the pseudo-3D, isodensity, and density profile plots for the experiment. The microdensitometer output was digitized for input to data display programs run on a CDC 7600. These results were used to provide submicrosecond accuracy for shock propagation over a 5 m of the outlet pipes. In addition, we obtained information about gas flow behind the shock front. Other current or possible applications for the technique are measurement of: target implosion in laser fusion, flash x-ray data in hydrodynamic and ballistic experiments, temperature profiles for high energy (> 10/sup 5/ K) gas dynamics, and dynamic events in weapons testing.
Date: June 5, 1981
Creator: Dittmore, C.H. & Glenn, H.D.
Partner: UNT Libraries Government Documents Department

Improved collecting apparatus

Description: An improved collecting apparatus for small aquatic or airborne organisms such as plankton, larval fish, insects, etc. The improvement constitutes an apertured removal container within which is retained a collecting bag, and which is secured at the apex of a conical collecting net. Such collectors are towed behind a vessel or vehicle with the open end of the conical net facing forward for trapping the aquatic or airborne organisms within the collecting bag, while allowing the water or air to pass through the apertures in the container. The container is readily removable from the collecting net whereby the collecting bag can be quickly removed and replaced for further sample collection. The collecting bag is provided with means for preventing the bag from being pulled into the container by the water or air following therethrough.
Date: March 5, 1981
Creator: Duncan, C.P.
Partner: UNT Libraries Government Documents Department

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

Studies of autoionizing states relevant to dielectronic recombination. Progress report for the third year

Description: An important loss process in CTR plasmas is the process of dielectronic recombination, which proceeds via autoionizing states. At this date, however, this problem is not fully understood, largely because of the nearly complete lack of fundamental atomic data on high excited autoionizing states. In this document, we outline the continuation of a program to investigate the properties of autoionizing states of alkaline earth metals by means of a novel laser excitation technique developed at SRI. This approach will allow us to study, for the first time, autoionizing states of arbitrary n, and l in a controlled environment. Specifically, we plan to measure autoionization rates and branching ratios as a function of n and l and the effects of electric fields. These experiments should yield the basic atomic data, autoionization rates, required as inputs to sophisticated model calculations of dielectronic recombination rates.
Date: January 5, 1981
Creator: Gallagher, T.F.
Partner: UNT Libraries Government Documents Department

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 the details of the electron behavior and theory.
Date: May 5, 1981
Creator: Hooper, E.B. Jr.; Allen, S.L. & Coakley, P.
Partner: UNT Libraries Government Documents Department

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 and temperature, and the confining potential are discussed.
Date: May 5, 1981
Creator: Jong, R.A.
Partner: UNT Libraries Government Documents Department

[News Clip: Bus safety]

Description: Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date: October 5, 1981, 5:00 p.m.
Creator: KXAS-TV (Television station : Fort Worth, Tex.)
Partner: UNT Libraries Special Collections

[News Clip: Child safety]

Description: Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story. This story aired at 5 P.M.
Date: November 5, 1981
Creator: KXAS-TV (Television station : Fort Worth, Tex.)
Partner: UNT Libraries Special Collections

[News Clip: City Jail]

Description: Video footage from the NBC 5/KXAS station in Fort Worth, Texas, to accompany a news story about the cost of a proposed City County Jail. This story was produced for the 6:00 P.M. news broadcast.
Date: January 5, 1981, 6:00 p.m.
Creator: KXAS-TV (Television station : Fort Worth, Tex.)
Partner: UNT Libraries Special Collections

[News Clip: Cold stream]

Description: Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date: October 5, 1981, 5:00 p.m.
Creator: KXAS-TV (Television station : Fort Worth, Tex.)
Partner: UNT Libraries Special Collections

[News Clip: Concessions]

Description: Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story that aired at 6 PM.
Date: August 5, 1981
Creator: KXAS-TV (Television station : Fort Worth, Tex.)
Location Info:
Partner: UNT Libraries Special Collections

[News Clip: Empty Planes]

Description: Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story that aired at 5 PM.
Date: August 5, 1981
Creator: KXAS-TV (Television station : Fort Worth, Tex.)
Location Info:
Partner: UNT Libraries Special Collections

[News Clip: Firings]

Description: Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story. This story aired at 6 PM.
Date: August 5, 1981
Creator: KXAS-TV (Television station : Fort Worth, Tex.)
Partner: UNT Libraries Special Collections

[News Clip: Firings # 2]

Description: B-roll footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story that aired at 6 PM.
Date: August 5, 1981
Creator: KXAS-TV (Television station : Fort Worth, Tex.)
Location Info:
Partner: UNT Libraries Special Collections