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Characteristics of the runaway electron beam instability in the HT-7 tokamak

Published online by Cambridge University Press:  01 October 2009

Z. Y. CHEN ,
J. X. ZHU ,
H. J. JU ,
Q. DU ,
Y. J. SHI ,
H. F. LIANG ,
M. LI  and
W. D. CAI
Z. Y. CHEN
Affiliation:
Department of Physics, Yunnan Normal University, Kunming 650092, People's Republic of China Key Laboratory of Advanced Technology and Manufacture for Renewable Energy Material, Ministry of Education, Kunming 650092, People's Republic of China ([email protected])
J. X. ZHU
Affiliation:
Department of Physics, Yunnan Normal University, Kunming 650092, People's Republic of China
H. J. JU
Affiliation:
Department of Physics, Yunnan Normal University, Kunming 650092, People's Republic of China
Q. DU
Affiliation:
Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, People's Republic of China
Y. J. SHI
Affiliation:
Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, People's Republic of China
H. F. LIANG
Affiliation:
Department of Physics, Yunnan Normal University, Kunming 650092, People's Republic of China
M. LI
Affiliation:
Department of Physics, Yunnan Normal University, Kunming 650092, People's Republic of China
W. D. CAI
Affiliation:
Department of Physics, Yunnan Normal University, Kunming 650092, People's Republic of China
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Abstract

Runaway electron ream instabilities have been observed in Ohmic plasmas in the HT-7 tokamak. The instability regime is characterized by relaxations in the electron cyclotron emission due to the relativistic anomalous Doppler resonance effect which transfers energy from parallel to perpendicular motion. Two types of instabilities in the slide-away regime have been observed in the HT-7 tokamak. The scaling of the threshold value for the instabilities to occur has been derived. It is found that the threshold value is linearly dependent on the plasma current and independent of the toroidal magnetic field strength.

Type
Papers
Information
Journal of Plasma Physics , Volume 75 , Issue 5 , October 2009 , pp. 661 - 667
Copyright
Copyright © Cambridge University Press 2009

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