Hard X-ray flux detection system of J-TEXT Tokamak device

一种j‑text托卡马克装置的硬x射线通量检测系统

Abstract

The invention discloses a hard X-ray flux detection system of a J-TEXT Tokamak device. The hard X-ray flux detection system comprises a hard X-ray detection module, a detection circuit and an AD data acquisition module; the J-TEXT Tokamak device generates a large number of high-speed escape electrons when disruption is operated; the high-speed escape electrons bombard the material of the first wall of the device so as to directly damage the material; great importance should be attached to the density monitoring of the escape electrons; when the escape electrons damage the first wall, thick target bremsstrahlung occurs between the escape electrons and the material, and hard X-rays are generated, and the energy of the hard X-rays can be up to 0.5 to 10MeV; the more escape electrons strike the wall of the device, the higher the energy of the generated hard X-rays is, and the higher pulse voltage outputted by the detector is; hard X-ray optical signals are converted to pulse voltage signals through the hard X-ray detection module; the peak signals of the pulse signals are detected by the detection circuit; the peak signals are transmitted to a computer terminal through the data acquisition card; the computer terminal stores the peak signals; radiation intensity can be determined; and since the radiation intensity is proportional to the amplitude of the pulse signals, the distribution condition of the escape electrons can be obtained.
本发明公开了一种J‑TEXT托卡马克装置的硬X射线通量检测系统,包括硬X射线探测模块、检波电路和AD数据采集模块;J‑TEXT托卡马克装置运行破裂时会产生大量高能高速逃逸电子,轰击该装置的第一壁材料,对材料造成直接损伤;所以对逃逸电子密度监测变得尤为重要;逃逸电子损失到第一壁时与材料发生厚靶韧致辐射,产生高能硬X射线,能量高达0.5‑10MeV;撞击器壁的逃逸电子越多,产生的硬X射线辐射能量越强,探测器输出脉冲电压越高;硬X射线光信号经硬X射线探测模块转换为脉冲电压信号,再由检波电路检测到脉冲信号峰值信号,经过数据采集卡传输到电脑终端进行存储,进而可确定辐射强度,因为辐射强度与脉冲信号幅值成正比,可得到逃逸电子分布情况。

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