Non-linear instability of DIII-D to error fields
Description:
Otherwise stable DIII-D discharges can become nonlinearly unstable to locked modes and disrupt when subjected to resonant m = 2, n = 1 error field caused by irregular poloidal field coils, i.e. intrinsic field errors. Instability is observed in DIII-D when the magnitude of the radial component of the m = 2, n = 1 error field with respect to the toroidal field is B{sub r21}/B{sub T} of about 1.7 {times} 10{sup {minus}4}. The locked modes triggered by an external error field are aligned with the …
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Date:
October 1, 1991
Creator:
La Haye, R. J. & Scoville, J. T.
Partner:
UNT Libraries Government Documents Department