Non-resonant destabilization of (1/1) internal kink mode by suprathermal electron pressure
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- Princeton Plasma Physics Laboratory, Princeton, New Jersey 08540 (United States)
- MIT - Laboratory of Nuclear Science, Cambridge, Massachusetts 02139 (United States)
- MIT - Plasma Science and Fusion Center, Cambridge, Massachusetts 02139 (United States)
New experimental observations are reported on the structure and dynamics of short-lived periodic (1, 1) “fishbone”-like oscillations that appear during radio frequency heating and current-drive experiments in tokamak plasmas. For the first time, measurements can directly relate changes in the high energy electrons to the mode onset, saturation, and damping. In the relatively high collisionality of Alcator C-Mod with lower hybrid current drive, the instability appears to be destabilized by the non-resonant suprathermal electron pressure—rather than by wave-particle resonance, rotates toroidally with the plasma and grows independently of the (1, 1) sawtooth crash driven by the thermal plasma pressure.
- OSTI ID:
- 22410277
- Journal Information:
- Physics of Plasmas, Vol. 22, Issue 5; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
- Country of Publication:
- United States
- Language:
- English
Electron fishbones destabilized nonresonantly by lower hybrid current drive
|
journal | August 2018 |
Suprathermal electron driven fishbone instability in the TCV tokamak
|
journal | November 2019 |
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