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Title: STATIONARY HIGH-PERFORMANCE DISCHARGES IN THE DII-D TOKAMAK

Abstract

A271 STATIONARY HIGH-PERFORMANCE DISCHARGES IN THE DII-D TOKAMAK. Discharges which can satisfy the high gain goals of burning plasma experiments have been demonstrated in the DIII-D tokamak under stationary conditions at relatively low plasma current (q{sub 95} > 4). A figure of merit for fusion gain ({beta}{sub N}H{sub 89}/q{sub 95}{sup 2}) has been maintained at values corresponding to ! = 10 operation in a burning plasma for > 6 s or 36{tau}{sub E} and 2{tau}{sub R}. The key element is the relaxation of the current profile to a stationary state with q{sub min} > 1. In the absence of sawteeth and fishbones, stable operation has been achieved up to the estimated no-wall {beta} limit. Feedback control of the energy content and particle inventory allow reproducible, stationary operation. The particle inventory is controlled by gas fueling and active pumping; the wall plays only a small role in the particle balance. The reduced current lessens significantly the potential for structural damage in the event of a major disruption. In addition, the pulse length capability is greatly increased, which is essential for a technology testing phase of a burning plasma experiment where fluence (duty cycle) is important.

Authors:
; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
GENERAL ATOMICS (US)
Sponsoring Org.:
(US)
OSTI Identifier:
813954
DOE Contract Number:  
AC03-99ER54463
Resource Type:
Conference
Resource Relation:
Conference: Conference title not supplied, Conference location not supplied, Conference dates not supplied; Other Information: THIS IS A PREPRINT OF A PAPER TO BE SUBMITTED FOR PUBLICATION IN NUCLEAR FUSION.; PBD: 1 Nov 2002
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; DOUBLET-3 DEVICE; ELECTRIC CURRENTS; FEEDBACK; PERFORMANCE; PLASMA; PUMPING; RELAXATION; TESTING

Citation Formats

LUCE, TC, WADE, MR, FERRON, JR, HYATT, AW, KELLMAN, AG, KINSEY, JE, LAHAYE, RJ, LASNIER, CJ, MURAKAMI, M, POLITZER, PA, and SCOVILLE, JT. STATIONARY HIGH-PERFORMANCE DISCHARGES IN THE DII-D TOKAMAK. United States: N. p., 2002. Web.
LUCE, TC, WADE, MR, FERRON, JR, HYATT, AW, KELLMAN, AG, KINSEY, JE, LAHAYE, RJ, LASNIER, CJ, MURAKAMI, M, POLITZER, PA, & SCOVILLE, JT. STATIONARY HIGH-PERFORMANCE DISCHARGES IN THE DII-D TOKAMAK. United States.
LUCE, TC, WADE, MR, FERRON, JR, HYATT, AW, KELLMAN, AG, KINSEY, JE, LAHAYE, RJ, LASNIER, CJ, MURAKAMI, M, POLITZER, PA, and SCOVILLE, JT. Fri . "STATIONARY HIGH-PERFORMANCE DISCHARGES IN THE DII-D TOKAMAK". United States. https://www.osti.gov/servlets/purl/813954.
@article{osti_813954,
title = {STATIONARY HIGH-PERFORMANCE DISCHARGES IN THE DII-D TOKAMAK},
author = {LUCE, TC and WADE, MR and FERRON, JR and HYATT, AW and KELLMAN, AG and KINSEY, JE and LAHAYE, RJ and LASNIER, CJ and MURAKAMI, M and POLITZER, PA and SCOVILLE, JT},
abstractNote = {A271 STATIONARY HIGH-PERFORMANCE DISCHARGES IN THE DII-D TOKAMAK. Discharges which can satisfy the high gain goals of burning plasma experiments have been demonstrated in the DIII-D tokamak under stationary conditions at relatively low plasma current (q{sub 95} > 4). A figure of merit for fusion gain ({beta}{sub N}H{sub 89}/q{sub 95}{sup 2}) has been maintained at values corresponding to ! = 10 operation in a burning plasma for > 6 s or 36{tau}{sub E} and 2{tau}{sub R}. The key element is the relaxation of the current profile to a stationary state with q{sub min} > 1. In the absence of sawteeth and fishbones, stable operation has been achieved up to the estimated no-wall {beta} limit. Feedback control of the energy content and particle inventory allow reproducible, stationary operation. The particle inventory is controlled by gas fueling and active pumping; the wall plays only a small role in the particle balance. The reduced current lessens significantly the potential for structural damage in the event of a major disruption. In addition, the pulse length capability is greatly increased, which is essential for a technology testing phase of a burning plasma experiment where fluence (duty cycle) is important.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2002},
month = {11}
}

Conference:
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