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Numerical analysis of the neutral beam attenuation rate on the HT-7 and EAST tokamaks

Published online by Cambridge University Press:  01 February 2008

GUOPING ZHANG ,
LIQUN HU ,
XIANMEI ZHANG ,
JUAN HUANG  and
JIN LIU
GUOPING ZHANG
Affiliation:
Institute of Plasma Physics, Chinese Academy of Sciences, Hefei City, Anhui Province, People's Republic of China ([email protected])
LIQUN HU
Affiliation:
Institute of Plasma Physics, Chinese Academy of Sciences, Hefei City, Anhui Province, People's Republic of China ([email protected])
XIANMEI ZHANG
Affiliation:
School of Science, East China University of Science and Technology, Shanghai, People's Republic of China
JUAN HUANG
Affiliation:
Institute of Plasma Physics, Chinese Academy of Sciences, Hefei City, Anhui Province, People's Republic of China ([email protected])
JIN LIU
Affiliation:
Institute of Plasma Physics, Chinese Academy of Sciences, Hefei City, Anhui Province, People's Republic of China ([email protected])
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Abstract

A diagnostic neutral beam (DNB) is applied to measure the plasma ion temperature and rotation speed in the HT-7 tokamak. Also, a heating neutral beam (HNB) is suggested as an effective method of heating a plasma for the EAST tokamak. As a necessary step to evaluate the required beam power in both applications, the attenuation of the injected neutral beam has been numerically calculated and analyzed considering the effect of various plasma parameters, such as electron temperature, electron density, impurity concentration, and so on. Three basic atomic processes are considered here. It is shown that at the same electron density neutral beam particles can penetrate deeper at higher injection energies and a DNB with the same full energy can attenuate faster at higher electron densities. The impurity effect on the attenuation of a DNB is discussed, and the attenuation of a HNB on the EAST tokamak is also considered.

Type
Papers
Information
Journal of Plasma Physics , Volume 74 , Issue 1 , February 2008 , pp. 9 - 19
Copyright
Copyright © Cambridge University Press 2007

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