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Resonant interaction of runaway electrons with magnetic field ripple in tokamak plasmas

Published online by Cambridge University Press:  01 October 2009

Z. Y. CHEN ,
B. N. WAN ,
Y. J. SHI ,
H. J. JU ,
J. X. ZHU  and
H. F. LIANG
Z. Y. CHEN
Affiliation:
Department of Physics, Yunnan Normal University, Kunming 650092, P. R. China (chenzy1003@163.com) Key Laboratory of Advanced Technology and Manufacture for Renewable Energy Material, Ministry of Education, Kunming 650092, P. R. China
B. N. WAN
Affiliation:
Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, P. R. China
Y. J. SHI
Affiliation:
Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, P. R. China
H. J. JU
Affiliation:
Department of Physics, Yunnan Normal University, Kunming 650092, P. R. China (chenzy1003@163.com)
J. X. ZHU
Affiliation:
Department of Physics, Yunnan Normal University, Kunming 650092, P. R. China (chenzy1003@163.com)
H. F. LIANG
Affiliation:
Department of Physics, Yunnan Normal University, Kunming 650092, P. R. China (chenzy1003@163.com)
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Abstract

The toroidal magnetic field of tokamaks is generated by a finite number of coils, which slightly modulates the magnetic field and runaway electrons experience this modulation. The resonant interaction between runaway electrons and the magnetic field ripple has been observed in the HT-7 tokamak. The maximum energy of runaways in the edge region could be blocked by the resonance of gyromotion with the nth harmonic of the magnetic field ripple. This resonant interaction is favorable for the control of runaway energy.

Type
Papers
Information
Journal of Plasma Physics , Volume 75 , Issue 5 , October 2009 , pp. 669 - 674
Copyright
Copyright © Cambridge University Press 2009

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