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

Abstract

Recent experiments in the DIII-D tokamak [J.L. Luxon, Nucl. Fusion 42,614 (2002)] have demonstrated high {beta} with good confinement quality under stationary conditions. Two classes of stationary discharges are observed--low q{sub 95} discharges with sawteeth and higher q{sub 95} without sawteeth. The discharges are deemed stationary when the plasma conditions are maintained for times greater than the current profile relaxation time. In both cases the normalized fusion performance ({beta}{sub N}H{sub 89P}/q{sub 95}{sup 2}) reaches or exceeds the value of this parameter projected for Q{sub fus} = 10 in the International Thermonuclear Experimental Reactor (ITER) design [R. Aymar, et al., Plasma Phys. Control. Fusion 44, 519 (2002)]. The presence of sawteeth reduces the maximum achievable normalized {beta}, while confinement quality (confinement time relative to scalings) is largely independent of q{sub 95}. Even with the reduced {beta} limit, the normalized fusion performance maximizes at the lowest q{sub 95}. Projections to burning plasma conditions are discussed, including the methodology of the projection and the key physics issues which still require investigation.

Authors:
Publication Date:
Research Org.:
General Atomics, San Diego, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
828532
Report Number(s):
GA-A24513
TRN: US0701774
DOE Contract Number:  
AC03-99ER54463
Resource Type:
Conference
Resource Relation:
Conference: 45th ANNUAL MEETING OF DIVISION OF PLASMA PHYSICS, ALBUQUERQUE, NEW MEXICO,OCTOBER 27-31,2003 AND TO BE PUBLISHED IN PHYS. PLASMAS.
Country of Publication:
United States
Language:
English
Subject:
22 GENERAL STUDIES OF NUCLEAR REACTORS; 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; CONFINEMENT; DESIGN; DOUBLET-3 DEVICE; EXPERIMENTAL REACTORS; PERFORMANCE; PHYSICS; PLASMA; RELAXATION TIME

Citation Formats

45th ANNUAL MEETING OF DIVISION OF PLASMA PHYSICS, ALBUQUERQUE, NEW MEXICO, OCTOBER 27-31,2003 AND TO BE PUBLISHED IN PHYS. PLASMAS. HIGH PERFORMANCE STATIONARY DISCHARGES IN THE DIII-D TOKAMAK. United States: N. p., 2003. Web.
45th ANNUAL MEETING OF DIVISION OF PLASMA PHYSICS, ALBUQUERQUE, NEW MEXICO, OCTOBER 27-31,2003 AND TO BE PUBLISHED IN PHYS. PLASMAS. HIGH PERFORMANCE STATIONARY DISCHARGES IN THE DIII-D TOKAMAK. United States.
45th ANNUAL MEETING OF DIVISION OF PLASMA PHYSICS, ALBUQUERQUE, NEW MEXICO, OCTOBER 27-31,2003 AND TO BE PUBLISHED IN PHYS. PLASMAS. Wed . "HIGH PERFORMANCE STATIONARY DISCHARGES IN THE DIII-D TOKAMAK". United States. https://www.osti.gov/servlets/purl/828532.
@article{osti_828532,
title = {HIGH PERFORMANCE STATIONARY DISCHARGES IN THE DIII-D TOKAMAK},
author = {45th ANNUAL MEETING OF DIVISION OF PLASMA PHYSICS, ALBUQUERQUE, NEW MEXICO, OCTOBER 27-31,2003 AND TO BE PUBLISHED IN PHYS. PLASMAS.},
abstractNote = {Recent experiments in the DIII-D tokamak [J.L. Luxon, Nucl. Fusion 42,614 (2002)] have demonstrated high {beta} with good confinement quality under stationary conditions. Two classes of stationary discharges are observed--low q{sub 95} discharges with sawteeth and higher q{sub 95} without sawteeth. The discharges are deemed stationary when the plasma conditions are maintained for times greater than the current profile relaxation time. In both cases the normalized fusion performance ({beta}{sub N}H{sub 89P}/q{sub 95}{sup 2}) reaches or exceeds the value of this parameter projected for Q{sub fus} = 10 in the International Thermonuclear Experimental Reactor (ITER) design [R. Aymar, et al., Plasma Phys. Control. Fusion 44, 519 (2002)]. The presence of sawteeth reduces the maximum achievable normalized {beta}, while confinement quality (confinement time relative to scalings) is largely independent of q{sub 95}. Even with the reduced {beta} limit, the normalized fusion performance maximizes at the lowest q{sub 95}. Projections to burning plasma conditions are discussed, including the methodology of the projection and the key physics issues which still require investigation.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2003},
month = {10}
}

Conference:
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