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Jia FU (符佳), Bo LYU (吕波), Haiqing LIU (刘海庆), Yingying LI (李颖颖), Dongmei LIU (刘冬梅), Yongqing WEI (魏永清), Chao FAN (范超), Yuejiang SHI (石跃江), Zhenwei WU (吴振伟), Baonian WAN (万宝年). Development of signal analysis method for the motional Stark effect diagnostic on EAST[J]. Plasma Science and Technology, 2017, 19(10): 104001. DOI: 10.1088/2058-6272/aa7941
Citation: Jia FU (符佳), Bo LYU (吕波), Haiqing LIU (刘海庆), Yingying LI (李颖颖), Dongmei LIU (刘冬梅), Yongqing WEI (魏永清), Chao FAN (范超), Yuejiang SHI (石跃江), Zhenwei WU (吴振伟), Baonian WAN (万宝年). Development of signal analysis method for the motional Stark effect diagnostic on EAST[J]. Plasma Science and Technology, 2017, 19(10): 104001. DOI: 10.1088/2058-6272/aa7941
shu
    Abstract
  • A pilot single-channel Motional Stark Effect (MSE) diagnostic has been developed on EAST since 2015. The dual photo-elastic modulators (PEM) were employed to encode the polarization angle into a time-varying signal. The pitch angle was related to the ratio of modulation amplitude at the second harmonic frequency. A digital harmonic analyzer (DHA) technique was developed for extracting the second harmonic amplitude. The results were validated with a hardware phase lock-in amplfier, and is also consistent with the software dual phase-locking algorithm.
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