Beam driven Alfven eigenmodes and fishbones in JET

Fast particle driven instabilities are investigated at low toroidal field B-0 approximate to 1 T in tritium, deuterium and hydrogen plasmas. Tritium, deuterium and hydrogen neutral beams with energies of 160, 140 and 110 keV were injected, respectively, into tritium, deuterium and hydrogen plasmas. The destabilization of Alfven eigenmodes was observed during injection of tritium beams into a tritium plasma and during the injection of deuterium beams into a deuterium plasma but not during the injection of hydrogen beams into a hydrogen plasma. At high beta, beta(N) = beta/(I-p/B(T)a) > 2.5, high amplitude fishbones were observed and appeared to be correlated with the degradation of confinement.


Published in:
Nuclear Fusion, 40, 4, 775-783
Year:
2000
ISSN:
0029-5515
ISBN:
0029-5515
Keywords:
Other identifiers:
Laboratories:
SPC
CRPP




 Record created 2008-04-16, last modified 2018-12-03


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