A Fast Charge eXchange Recombination Spectroscopy (CXRS) diagnostic with eight radial channels has been implemented on a HuanLiu-2A (HL-2A) tokamak with a time resolution of up to 10 kHz monitoring helium II spectra or 1 kHz monitoring carbon VI spectra. The crucial aspects of the fast CXRS are to improve the spectral intensity and the acquisition frequency. The spectral intensity has been greatly enhanced by customized fiber bundles. The main boost in optimizing the acquisition frequency is achieved by binning more pixel rows of the charge coupled device (CCD) representing one radial channel and by reducing the effective image area of the CCD. Consequently, the sawtooth oscillations of ion temperature and rotation velocity are continuously observed for the first time in the HL-2A tokamak.

中文翻译：

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欢流2A托卡马克快速电荷交换复合光谱

已在 HuanLiu-2A (HL-2A) 托卡马克上实施了具有八个径向通道的快速电荷交换重组光谱 (CXRS) 诊断，其时间分辨率高达 10 kHz 监测氦 II 光谱或 1 kHz 监测碳 VI 光谱。快速 CXRS 的关键方面是提高光谱强度和采集频率。定制的光纤束大大增强了光谱强度。通过合并代表一个径向通道的电荷耦合器件 (CCD) 的更多像素行并减少 CCD 的有效图像区域，可以实现优化采集频率的主要提升。因此，首次在 HL-2A 托卡马克中连续观测到离子温度和旋转速度的锯齿振荡。