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High-frequency B-dot probes used to detect characteristics of ion cyclotron range of frequency waves in EAST

Part of: Focus on Fusion

Published online by Cambridge University Press:  23 April 2019

Lunan Liu ,
Xinjun Zhang ,
Chengming Qin ,
Yanping Zhao ,
Shuai Yuan ,
Yuzhou Mao  and
Jianhua Wang
Lunan Liu
Affiliation:
Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China University of Science and Technology of China, Hefei 230026, China
Xinjun Zhang*
Affiliation:
Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
Chengming Qin*
Affiliation:
Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
Yanping Zhao
Affiliation:
Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
Shuai Yuan
Affiliation:
Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
Yuzhou Mao
Affiliation:
Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
Jianhua Wang
Affiliation:
Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China University of Science and Technology of China, Hefei 230026, China
*
†Email addresses for correspondence: xjzhang@ipp.ac.cn, chmq@ipp.ac.cn
†Email addresses for correspondence: xjzhang@ipp.ac.cn, chmq@ipp.ac.cn
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Abstract

The plasma in the scrape-off layer (SOL) has an important effect on the coupling of the waves in the ion cyclotron range of frequencies (ICRF). The high-frequency B-dot (HFB) probes have been installed to investigate the behaviour of ICRF waves on EAST. The fast and slow ICRF wave field amplitudes are measured and a domain parallel wavenumber is deduced. Results of measurements on a test experimental platform and EAST experiments are presented, which include vacuum and plasma situations. In vacuum it is found that field amplitudes increase linearly with ICRF power. Besides, during plasma operation, field amplitudes measured were decreased by an order of magnitude and no linear relation with power was observed. Fast and slow wave power densities fluctuate strongly with plasma density. The experimental results in the laboratory coincide with the simulation results and allow for validating of the measurement method.

Keywords

fusion plasmaplasma diagnosticsplasma heating
Type
Research Article
Information
Journal of Plasma Physics , Volume 85 , Issue 2 , April 2019 , 905850214
Copyright
© Cambridge University Press 2019 

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