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
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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
Li Gao
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Jiefeng Huang;Li Gao

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汤姆逊散射(TS)诊断是测量电子温度和密度的最有效的方法之一。设计并在实验室测试了一种信号测量电路,用于读出J-TEXT TS诊断上的雪崩光电二极管(APD)探测器。在该电路中,一个APD与所需的信号放大模块被用来检测散射光子。设计了一种基于半导体致冷器的温度控制电路,使APD在较短的响应时间(~600 ms)内保持恒温,并将检测电路的信噪比提高到18。这些特征有望提高TS光测量的准确性。给出了APD探测器电路的详细设计过程和测试结果。
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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发表时间: 1987-09
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