Abstract:

The improvement of the arcing detector for the ECRH system in HL-2A tokomak is presented in this paper. Two types of photoelectric conversion module, four different operator amplifiers are investigated and the anti-self-excitation capacitor is quantitatively studied in this improvement. The GGOE-2 photoelectric converter and OPA128LM operator amplifier are finally chosen. The anti-self-excitation capacity is determined to be 30pF. 30 arcing detectors were produced and tested to satisfy the requirement of the HL-2A tokomak in 2009. The measured average response time is 1.2μs, which is shorter than the former’s. The arcing detectors work properly in different level of background light and in complicated electromagnetic environment.

Key words: HL-2A tokamak, ECRH, High power microwave, Arcing, Arcing detector

摘要：

介绍了HL-2A装置电子回旋共振加热系统打火保护装置的改进。在改进设计过程中，实测了2类光电转换模块、4种型号的运算放大器芯片，定量测量了防自激电容的性能。选择了GGOE-2型光电转换器件，OPA128LM型运算放大器，确定了防自激电容为30pF。制作了30个原型机，满足了2009年HL-2A装置的要求。实验测得响应时间平均值为1.2μs，较改进前方案的小。此弧光探测器能够在不同强度的本底光和复杂电磁环境下稳定工作。

关键词: HL-2A装置, 电子回旋共振加热, 高功率微波, 弧光打火, 弧光探测