Design and implementation of power and phase feedback control system for ICRH on EAST

doi:10.1007/s41365-018-0362-8

Nuclear Science and Techniques ›› 2018, Vol. 29 ›› Issue (2): 19 doi: 10.1007/s41365-018-0362-8

• NUCLEAR ELECTRONICS AND INSTRUMENTATION • Previous Articles Next Articles

Design and implementation of power and phase feedback control system for ICRH on EAST

Zhao Chen ^1,2, Yan-Ping Zhao¹, Gen Chen ¹, Yan Cheng¹, Jian-Hua Wang ^1,2, Jia-Hui Zhang ^1,2, Yu-Qing Yang^1,2

¹Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
² University of Science and Technology of China, Hefei 230027, China

Contact: Zhao Chen E-mail:chen207@mail.ustc.edu.cn
Supported by:
This work was supported in part by the National Magnetic Confinement Fusion Science Program (No. 2015GB101001) and the National Natural Science Foundation of China (Nos. 11375236 and 11375235).

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Zhao Chen, Yan-Ping Zhao, Gen Chen, Yan Cheng, Jian-Hua Wang, Jia-Hui Zhang, Yu-Qing Yang. Design and implementation of power and phase feedback control system for ICRH on EAST.Nuclear Science and Techniques, 2018, 29(2): 19 doi: 10.1007/s41365-018-0362-8

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Abstract

Abstract:

Ion cyclotron wave resonance heating (ICRH) is one of the most important auxiliary methods to heat plasma in the Experimental Advanced Superconducting Tokamak (EAST). Several megawatts of power is transmitted through separate coaxial lines and coupled with the plasma through arrays of loop antennas. The parameters of the ICRH system, including the injected power and phasing between antenna straps, are critical to the coupling efficiency of the power as well as the resulting impact on the heating efficiency. In this paper, we present a system for feedback control of the phase between the current straps and the ICRH power on EAST. The feedback control system was tested using both a matched dummy load and a plasma load, and it successfully maintained stable operation in the 2016 EAST campaign. Good control of the injected power and wave phases was achieved during edgelocalized mode operation.

Key words: ICRH, Phase, Power, Feedback control system, FPGA

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Design and implementation of power and phase feedback control system for ICRH on EAST

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