A hard X-ray measurement system is developed to observe the activities of runaway electrons in versatile experiment spherical torus (VEST) at Seoul National University. The detection system provides information on the generation of runaway electrons by detecting hard X-rays from its bremsstrahlung radiation. To acquire such information, the X-ray spectrum at several tens to hundreds of keV at the maximum is reconstructed using signals from four thin scintillation detectors with different energy sensitivities, and the spectrum is converted to the original X-ray energy. The unfolding process is implemented by an artificial neural network model trained using a measured X-ray spectrum generated by an X-ray tube source at 50 to 320 keV. The system would reveal the generation mechanism of runaway electrons during plasma discharges with various MHD activities in VEST to mitigate and suppress runaway electrons.

在首尔国立大学开发了一种硬X射线测量系统，以观察多功能实验球形圆环（VEST）中失控电子的活动。该探测系统通过探测来自其stra致辐射的硬X射线来提供有关失控电子生成的信息。为了获得这样的信息，使用来自四个具有不同能量灵敏度的薄型闪烁探测器的信号来重建最大几十到几百keV的X射线光谱，并将该光谱转换为原始的X射线能量。展开过程是通过人工神经网络模型实施的，该模型使用由X射线管源在50到320 keV处产生的测量X射线光谱训练而成。