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Title: PROGRESS TOWARD FULLY NONINDUCTIVE, HIGH BETA DISCHARGES IN DIII-D

Abstract

OAK-B135 Advanced Tokamak (AT) research in DIII-D focuses on developing a scientific basis for steady-state, high performance operation. For optimal performance, these experiments routinely operate with {beta} above the n = 1 no-wall limit, enabled by active feed-back control. The ideal wall {beta} limit is optimized by modifying the plasma shape, current and pressure profile. Present DIII-D AT experiments operate with f{sub BS} {approx} 50%-60%, with a long-term goal of {approx} 90%. Additional current is provided by neutral beam and electron cyclotron current drive, the latter being localized well away from the magnetic axis ({rho} {approx} 0.4-0.5). Guided by integrated modeling, recent experiments have produced discharges with {beta} {approx} 3%, {beta}{sub N} {approx} 3, f{sub BS} {approx} 55% and noninductive fraction f{sub NI} {approx} 90%. Additional control is anticipated using fast wave current drive to control the central current density.

Authors:
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Publication Date:
Research Org.:
GENERAL ATOMICS (US)
Sponsoring Org.:
(US)
OSTI Identifier:
821580
DOE Contract Number:  
AC03-99ER54463
Resource Type:
Conference
Resource Relation:
Conference: 30TH EUROPEAN PHYSICAL SOCIETY CONFERENCE ON CONTROLLED FUSION AND PLASMA PHYSICS, St. PETERSBURG (RU), 07/07/2003--07/11/2003; Other Information: PBD: 1 Aug 2003
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; CURRENT DENSITY; CYCLOTRONS; DOUBLET-3 DEVICE; ELECTRONS; PERFORMANCE; PHYSICS; PLASMA; SHAPE; SIMULATION

Citation Formats

GREENFIELD, CM, FERRON, JR, MURAKAMI, M, WADE, MR, BUDNY, RV, BURRELL, KH, CASPER, TA, DeBOO, JC, DOYLE, EJ, GAROFALO, AM, JAYAKUMAR, RJ, KESSEL, C, LAO, LL, LOHR, J, LUCE, TC, MAKOWSKI, MA, MENARD, JE, PETRIE, TW, PETTY, CC, PINSKER, RI, PRATER, R, POLITZER, PA, St JOHN, HE, TAYLOR, TS, WEST, WP, and DIII-D NATIONAL TEAM. PROGRESS TOWARD FULLY NONINDUCTIVE, HIGH BETA DISCHARGES IN DIII-D. United States: N. p., 2003. Web.
GREENFIELD, CM, FERRON, JR, MURAKAMI, M, WADE, MR, BUDNY, RV, BURRELL, KH, CASPER, TA, DeBOO, JC, DOYLE, EJ, GAROFALO, AM, JAYAKUMAR, RJ, KESSEL, C, LAO, LL, LOHR, J, LUCE, TC, MAKOWSKI, MA, MENARD, JE, PETRIE, TW, PETTY, CC, PINSKER, RI, PRATER, R, POLITZER, PA, St JOHN, HE, TAYLOR, TS, WEST, WP, & DIII-D NATIONAL TEAM. PROGRESS TOWARD FULLY NONINDUCTIVE, HIGH BETA DISCHARGES IN DIII-D. United States.
GREENFIELD, CM, FERRON, JR, MURAKAMI, M, WADE, MR, BUDNY, RV, BURRELL, KH, CASPER, TA, DeBOO, JC, DOYLE, EJ, GAROFALO, AM, JAYAKUMAR, RJ, KESSEL, C, LAO, LL, LOHR, J, LUCE, TC, MAKOWSKI, MA, MENARD, JE, PETRIE, TW, PETTY, CC, PINSKER, RI, PRATER, R, POLITZER, PA, St JOHN, HE, TAYLOR, TS, WEST, WP, and DIII-D NATIONAL TEAM. Fri . "PROGRESS TOWARD FULLY NONINDUCTIVE, HIGH BETA DISCHARGES IN DIII-D". United States. https://www.osti.gov/servlets/purl/821580.
@article{osti_821580,
title = {PROGRESS TOWARD FULLY NONINDUCTIVE, HIGH BETA DISCHARGES IN DIII-D},
author = {GREENFIELD, CM and FERRON, JR and MURAKAMI, M and WADE, MR and BUDNY, RV and BURRELL, KH and CASPER, TA and DeBOO, JC and DOYLE, EJ and GAROFALO, AM and JAYAKUMAR, RJ and KESSEL, C and LAO, LL and LOHR, J and LUCE, TC and MAKOWSKI, MA and MENARD, JE and PETRIE, TW and PETTY, CC and PINSKER, RI and PRATER, R and POLITZER, PA and St JOHN, HE and TAYLOR, TS and WEST, WP and DIII-D NATIONAL TEAM},
abstractNote = {OAK-B135 Advanced Tokamak (AT) research in DIII-D focuses on developing a scientific basis for steady-state, high performance operation. For optimal performance, these experiments routinely operate with {beta} above the n = 1 no-wall limit, enabled by active feed-back control. The ideal wall {beta} limit is optimized by modifying the plasma shape, current and pressure profile. Present DIII-D AT experiments operate with f{sub BS} {approx} 50%-60%, with a long-term goal of {approx} 90%. Additional current is provided by neutral beam and electron cyclotron current drive, the latter being localized well away from the magnetic axis ({rho} {approx} 0.4-0.5). Guided by integrated modeling, recent experiments have produced discharges with {beta} {approx} 3%, {beta}{sub N} {approx} 3, f{sub BS} {approx} 55% and noninductive fraction f{sub NI} {approx} 90%. Additional control is anticipated using fast wave current drive to control the central current density.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2003},
month = {8}
}

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