HIGH PERFORMANCE STATIONARY DISCHARGES IN THE DIII-D TOKAMAK

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

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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:: 45th ANNUAL MEETING OF DIVISION OF PLASMA PHYSICS, ALBUQUERQUE, NEW MEXICO, OCTOBER 27-31,2003 AND TO BE PUBLISHED IN PHYS. PLASMAS.

Publication Date:: 2003-10-01

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

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                    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.

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                    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.

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                    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.

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@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          = {},

  url          = {https://www.osti.gov/biblio/828532},
  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {2003},

  month        = {10}

}

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