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Title SUSTAINED STABILIZATION OF THE RESISTIVE WALL MODE BY PLASMA ROTATION IN THE DIII-D TOKAMAK
Creator/Author 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
Publication Date2001 Oct 01
OSTI IdentifierOSTI ID: 825629
Report Number(s)GA-A23849
DOE Contract NumberAC03-99ER54463
Other Number(s)TRN: US200425%%303
Resource TypeJournal Article
Resource RelationJournal Name: ; Other Information: No journal information given for this preprint; PBD: 1 Oct 2001
Research OrgGENERAL ATOMICS (US)
Sponsoring Org(US)
Subject70 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
Description/AbstractOAK-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.
Country of PublicationUnited States
LanguageEnglish
FormatMedium: ED; Size: 13 pages
AvailabilityINIS; OSTI as DE00825629
System Entry Date2008 Feb 05

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