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Title: ALT-II progress report and proposal, December 1989--December 1990

Abstract

The Advanced Limiter Test (ALT-11) is a joint international program among the United States, the Federal Republic of Germany, and Japan to investigate the performance of a toroidal belt pump limiter in a tokamak, to investigate the behavior of the plasma edge, and to relate edge behavior to overall core energy and particle confinement. The experiments are carried out in the TEXTOR tokamak at KFA Juelich, Federal Republic of Germany. The ALT-II experiment was installed in TEXTOR in 1987 with the objectives of optimizing plasma performance in a limiter tokamak, and of studying the physics of particle removal, density and impurity control, and confinement enhancement by a toroidal belt pump limiter. The ALT-II program addresses large area limiter tokamak operation issues by providing a program specifically directed toward plasma optimization and particle and impurity control by a toroidal belt limiter in a machine dedicated to the investigation of plasma-wall interactions. TEXTOR features the most advanced set of edge plasma diagnostics of any tokamak for the task of diagnosing and understanding the impact of the limiter on the plasma confinement and performance. With the addition of 3.4 MW of neutral beam injection heating (NBI) to the existing 4 MW of ionmore » cyclotron resonance heating (ICRH), TEXTOR also provides power densities equivalent to larger tokamaks.« less

Publication Date:
Research Org.:
California Univ., Los Angeles, CA (United States)
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
10190848
Report Number(s):
DOE/ER/51069-T5
ON: DE93004142
DOE Contract Number:
FG03-85ER51069
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: [1989]
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; PUMPED LIMITERS; TESTING; PROGRESS REPORT; TEXTOR TOKAMAK; BEAM INJECTION HEATING; PLASMA DIAGNOSTICS; PLASMA IMPURITIES; 700420; PLASMA-FACING COMPONENTS

Citation Formats

Not Available. ALT-II progress report and proposal, December 1989--December 1990. United States: N. p., 1989. Web. doi:10.2172/10190848.
Not Available. ALT-II progress report and proposal, December 1989--December 1990. United States. doi:10.2172/10190848.
Not Available. Sun . "ALT-II progress report and proposal, December 1989--December 1990". United States. doi:10.2172/10190848. https://www.osti.gov/servlets/purl/10190848.
@article{osti_10190848,
title = {ALT-II progress report and proposal, December 1989--December 1990},
author = {Not Available},
abstractNote = {The Advanced Limiter Test (ALT-11) is a joint international program among the United States, the Federal Republic of Germany, and Japan to investigate the performance of a toroidal belt pump limiter in a tokamak, to investigate the behavior of the plasma edge, and to relate edge behavior to overall core energy and particle confinement. The experiments are carried out in the TEXTOR tokamak at KFA Juelich, Federal Republic of Germany. The ALT-II experiment was installed in TEXTOR in 1987 with the objectives of optimizing plasma performance in a limiter tokamak, and of studying the physics of particle removal, density and impurity control, and confinement enhancement by a toroidal belt pump limiter. The ALT-II program addresses large area limiter tokamak operation issues by providing a program specifically directed toward plasma optimization and particle and impurity control by a toroidal belt limiter in a machine dedicated to the investigation of plasma-wall interactions. TEXTOR features the most advanced set of edge plasma diagnostics of any tokamak for the task of diagnosing and understanding the impact of the limiter on the plasma confinement and performance. With the addition of 3.4 MW of neutral beam injection heating (NBI) to the existing 4 MW of ion cyclotron resonance heating (ICRH), TEXTOR also provides power densities equivalent to larger tokamaks.},
doi = {10.2172/10190848},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sun Dec 31 00:00:00 EST 1989},
month = {Sun Dec 31 00:00:00 EST 1989}
}

Technical Report:

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  • The Advanced Limiter Test (ALT-11) is a joint international program among the United States, the Federal Republic of Germany, and Japan to investigate the performance of a toroidal belt pump limiter in a tokamak, to investigate the behavior of the plasma edge, and to relate edge behavior to overall core energy and particle confinement. The experiments are carried out in the TEXTOR tokamak at KFA Juelich, Federal Republic of Germany. The ALT-II experiment was installed in TEXTOR in 1987 with the objectives of optimizing plasma performance in a limiter tokamak, and of studying the physics of particle removal, density andmore » impurity control, and confinement enhancement by a toroidal belt pump limiter. The ALT-II program addresses large area limiter tokamak operation issues by providing a program specifically directed toward plasma optimization and particle and impurity control by a toroidal belt limiter in a machine dedicated to the investigation of plasma-wall interactions. TEXTOR features the most advanced set of edge plasma diagnostics of any tokamak for the task of diagnosing and understanding the impact of the limiter on the plasma confinement and performance. With the addition of 3.4 MW of neutral beam injection heating (NBI) to the existing 4 MW of ion cyclotron resonance heating (ICRH), TEXTOR also provides power densities equivalent to larger tokamaks.« less
  • Research underway in this project centers upon developing and evaluating catalysts and process improvements for coal liquefaction in the two-stage close-coupled catalytic process. The project is being carried out under contract to the United States Department of Energy. Bench-scale beneficiation of Martin Lake lignite and Illinois No. 6 coal was used to prepare low-ash coal samples for subsequent liquefaction in the AU-51 flow unit. Size separation in combination with gravity beneficiation was effective in beneficiating Illinois No. 6 coal, and size separation in combination with aqueous sulfur dioxide treatment followed by density separation was also productive for Martin Lake lignite.more » The liquefaction of these Illinois No. 6 samples resulted in significant differences in the yields of distillable product. The low density, float fraction was the preferred liquefaction feedstock due to its low ash content (6.5%) and high distillate yield. The high density, sink fraction should be rejected due to its high ash content (18.3%), even though this material functioned as a weak catalyst and produced light product.« less
  • A two dimensional numerical model of the inversion layer metal insulator semiconductor (IL/MIS) solar cell is proposed by using the finite element method. The two-dimensional current flow in the device is taken into account in this model. The electrostatic potential distribution, the electron concentration distribution, and the hole concentration distribution for different terminal voltages are simulated. The results of simple calculation are presented. The existing problems for this model are addressed. Future work is proposed. The MIS structures are studied and some of the results are reported.