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OAK-B135 A path to sustained stable operation, at plasma pressure up to twice the ideal magnetohydrodynamic (MHD) n = 1 free-boundary pressure limit, has been discovered in the DIII-D tokamak. Tuning the correction of the intrinsic magnetic field asymmetries so as to minimize plasma rotation decay during the high beta phase and increasing the angular momentum injection, have allowed maintaining the plasma rotation above that needed for stabilization of the resistive wall mode (RWM). A new method to determine the improved magnetic field correction uses feedback to sense and minimize the resonant plasma response to the non-axisymmetric field. At twice the free-boundary pressure limit, a disruption precursor is observed, which is consistent with having reached the ''ideal wall'' pressure limit predicted by stability calculations.
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| Authors: |
GAROFALO,A.M;
STRAIT,E.J;
JOHNSON,L.C;
LA HAYE,R.J;
LAZARUS,E.A;
NAVRATIL,G.A;
OKABAYASHI,M;
SCOVILLE,J.T;
TAYLOR,T.S;
TURNBULL,A.D;
AND THE DIII-D TEAM
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| Publication Date: | 2001 Oct 01 |
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| OSTI Identifier: | 825629 |
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| Report Number(s): | GA-A23849 |
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| DOE Contract Number: | AC03-99ER54463 |
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| Resource Type: | Journal Article |
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| Resource Relation: | Journal Name: ; Other Information: No journal information given for this preprint; PBD: 1 Oct 2001 |
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| Research Org: | GENERAL ATOMICS (US) |
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| Sponsoring Org: | (US) |
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| Country of Publication: | United States |
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| Language: | English |
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| Format: | Size: 13 pages |
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| Other Number(s): | TRN: US0403128 |
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| Subject: | 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ANGULAR MOMENTUM; DECAY; DOUBLET-3 DEVICE; FEEDBACK; MAGNETIC FIELDS; MAGNETOHYDRODYNAMICS; PLASMA; PLASMA PRESSURE; PRECURSOR; ROTATION; STABILITY; STABILIZATION; TUNING |
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| Availability: | INIS; OSTI as DE00825629 |
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| Update Date: | 2009 Dec 11 |
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