A toroidal soft x-ray array system for spectrum and intensity measurements on the EXL-50 spherical tokamak is described. Silicon drift detectors and digital multichannel analyzers are adopted for all 21 channels of the array, and an average energy resolution of 147 eV at 5.89 keV has been achieved at count rates over 500 kcps. In total, 20 channels of the array are symmetrically observed in both co- and counter-current directions on the EXL-50 mid-plane with a spatial resolution of around 10 cm, and the remaining one serves as a background reference channel. Tungsten emissions from tungsten coating of the limiters on the central post are observed. The influence of hard x rays on measured soft x-ray spectra and system operation is discussed.

中文翻译：

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EXL-50球形托卡马克上的环形软X射线阵列

描述了一种用于在 EXL-50 球形托卡马克上进行光谱和强度测量的环形软 X 射线阵列系统。阵列的所有21个通道均采用硅漂移探测器和数字多通道分析仪，在500 kcps以上的计数率下实现了5.89 keV下147 eV的平均能量分辨率。总共在 EXL-50 中平面上的同向和逆流方向上对称地观察到阵列的 20 个通道，空间分辨率约为 10 cm，其余通道用作背景参考通道。观察到来自中心柱上限制器的钨涂层的钨排放。讨论了硬x射线对测量的软x射线光谱和系统操作的影响。