STUDY OF HIGH-BETA MAGNETOHYDRODYNAMIC MODES AND FAST ION LOSSES IN PDX
Strong magnetohydrodynamic activity has been observed in PDX neutral beam heated discharges. It occurs for beta-tau-q >= 0.045 and is associated with a significant loss of fast ions and a drop in neutron emission. As much as 20 % - 40 % of the beam heating power may be lost. The instability occurs in repetitive bursts of oscillations of <=1 msec duration at 1 - 6 msec intervals. The magnetohydrodynamic activity has been dubbed the "fishbone instability" from its characteristic signature on the Mirnov coils.
Bibliographic Reference: PHYSICAL REVIEW LETTERS, VOL. 50 (1983), NO. 12, PP. 891-895
Record Number: 1989122039500 / Last updated on: 1987-01-01
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