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离子温度和旋转速度是聚变等离子体中的重要物理参数,在先进实验超导托卡马克EAST(Experimental Advanced Superconducting Tokamak)上电荷交换复合光谱(Charge e Xchange Recombination Spectroscopy,CXRS)诊断是测量这些物理参数的标配诊断之一。由于截面效应的存在,CXRS诊断测量的谱线线型会受到影响,导致得到的离子温度和旋转速度偏离实际值,为了得到真实值,需要对离子温度和旋转速度进行修正。在EAST上,分别采用常用的动力学理论和数值计算方法对测量到的实验数据进行修正,同时对比两种方法对截面效应的修正结果,可以看出两种方法得到的结果趋势基本一致。对2015年EAST上电荷交换复合光谱测量到的典型的实验数据进行修正,结果表明在目前的放电条件下截面效应对离子温度的影响比较小,而对旋转速度的影响低于10%。
Ion temperature and spin speed are important physical parameters in fusion plasmas. Charges X-ray recombination spectroscopy (CXRS) diagnostics in Advanced Experimental Superconducting Tokamak is a method of measuring these physical parameters One of the standard diagnostics. Due to the cross-section effect, the line shape of the CXRS diagnostic measurement will be affected. As a result, the obtained ion temperature and rotation speed deviate from the actual value. In order to obtain the true value, the ion temperature and the rotation speed need to be corrected. In EAST, the commonly used kinetic theory and numerical calculation method were respectively used to correct the measured experimental data. By comparing the correction results of the two methods with the cross-sectional effects, it can be seen that the results obtained by the two methods are basically the same. The typical experimental data measured by the 2015 EAST charge-exchange complex spectroscopy were modified and the results show that the cross-section effect on the ion temperature is less affected by the current discharge conditions and less than 10% on the rotational speed.