A new electromagnetic probe array diagnostic for analyzing electrostatic and magnetic fluctuations in EAST plasmas

作者：Heng LAN, Tonghui Shi, Ning Yan, Xueqin Li, Shi Li, R. Chen, Moyi DUAN, Guanghai Hu, Lunan Liu, Wei Zhang, Ming Chen, Y. Zheng, Zhong YUAN, Yong Wang, Zhanghou Xu, Liqing Xu, Pengfei Zi, Liang Chen, Shaocheng LIU, Donggui WU, Genfan DING, L.Y. Meng, Zhengchu Wang, Qing Zang, Muquan Wu, Xiang Zhu, Baolong Hao, Xiaodong Lin, Xiang Gao, Liang Wang, Guosheng Xu · 发表于：Plasma Science and Technology · 年份：2023 · DOI：10.1088/2058-6272/acbef5 · 被引用次数：9 · 研究领域：Magnetic confinement fusion research、Ionosphere and magnetosphere dynamics、Physics of Superconductivity and Magnetism

Abstract A novel electromagnetic probe array (EMPA) diagnostic, which consists of a magnetic probe array and an electrostatic probe array, has recently been developed on EAST. The EMPA is fixed near the first wall at horizontal port P. The magnetic probe array of the EMPA consists of 24 identical magnetic probes, each of them capable of measuring toroidal, poloidal and radial magnetic fluctuations simultaneously, providing additional toroidal magnetic fluctuation measurements compared with the regular magnetic probes on EAST. With a higher sampling rate and self-resonant frequency, the EMPA magnetic probes can provide higher frequency magnetic fluctuation measurements. The magnetic probe array of the EMPA is composed of two parallel layers of magnetic probes with a radial distance of 63 mm, and each layer of magnetic probes is arranged in four poloidal rows and three toroidal columns. The compact arrangement of the EMPA magnetic probe array largely improves the toroidal mode number measurement ability from − 8 ≤ n ≤ 8 to − 112 ≤ n ≤ 112 , and also improves the high poloidal wave number measurement ability of magnetic fluctuations compared with the regular high frequency magnetic probes on EAST. The electrostatic probe array of the EMPA consists of two sets of four-tip probes and a single-tip probe array with three poloidal rows and four toroidal columns. It complements the electrostatic parameter measurements behind the main limiter and near ...