Observation of ballooning instabilities with medium toroidal mode number in high temperature tokamak plasmas
- Princeton Univ., NJ (United States). Plasma Physics Lab.
- Columbia Univ., New York, NY (United States)
A beta degradation event in a high {beta}p, TFTR tokamak plasma is analyzed with X-ray and electron cyclotron emission (ECE) imaging techniques. Medium-n (toroidal mode number) instabilities with ballooning characteristics are observed near and within the q =1.5 surface during a slow degradation in the plasma {beta} and precede a sudden partial collapse in the central plasma pressure. This is the first reported observation of a ballooning instability in the interior of a large, collisionless tokamak plasma.
- Research Organization:
- Princeton Univ., NJ (United States). Plasma Physics Lab.
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC02-76CH03073; FG02-89ER53297
- OSTI ID:
- 10169892
- Report Number(s):
- PPPL--2850; ON: DE92018962
- Country of Publication:
- United States
- Language:
- English
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