Observation of internal kink instability purely driven by suprathermal electrons in the HL-1M tokamak
- 18 May 2002
- journal article
- Published by IOP Publishing in Nuclear Fusion
- Vol. 42 (5), 491-495
- https://doi.org/10.1088/0029-5515/42/5/301
Abstract
Strong m = 1 MHD activities are observed in the HL-1M tokamak during off-axis electron cyclotron resonance heating (ECRH) when the cyclotron resonance location is placed just outside the q = 1 surface at the high-magnetic-field side of the magnetic surface. Addition of lower-hybrid waves to ECRH significantly enhances the MHD excitation, but lower-hybrid waves alone cannot excite or sustain the mode. This result is a clear demonstration of the suprathermal trapped electron effect on the instability because of the absence of energetic ions in the plasma.This publication has 13 references indexed in Scilit:
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