Design of APD Detector Circuit for Thomson Scattering System on J-TEXT Tokamak
Design of APD Detector Circuit for Thomson Scattering System on J-TEXT Tokamak
复制标题
J-TEXT托卡马克汤姆逊散射系统APD探测器电路设计
DOI:
10.1109/tps.2018.2866999
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发表时间:
2018-09
影响因子:
1.5
通讯作者:
Li Gao
中科院分区:
文献类型:
--
作者:
Jiefeng Huang;Li Gao
Thomson scattering (TS) diagnostic is one of the most powerful methods to measure electron temperature and density. A signal measurement circuit has been designed and tested in the laboratory for readout of avalanche photodiode (APD) detector on J-TEXT TS diagnostic. In this circuit, an APD with required signal-amplifying module is used for detecting the scattered photons. A novel temperature control circuit based on thermoelectric cooler is developed for maintaining APD at a constant temperature with short response time (~600 ms), and it enhances the signal to noise ratio of the detection circuit up to 18. These features are expected to improve the accuracy of TS light measurement. The detailed design processes and test results of the APD detector circuit are presented.
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