Space‐ and time‐resolved measurements of ion temperature with the CVI 5292‐Å charge‐exchange recombination line after subtracting background radiation
Space‐ and time‐resolved measurements of ion temperature with the CVI 5292‐Å charge‐exchange recombination line after subtracting background radiation
复制标题
减去背景辐射后，使用 CVI 5292-Å 电荷交换复合线对离子温度进行空间和时间分辨测量
DOI：
10.1063/1.1140337
复制
发表时间：
1988
影响因子：
1.6
通讯作者：
S. Hidekuma
中科院分区：
文献类型：
--
作者：
K. Ida;S. Hidekuma
利用安装在JIPP TII-U托卡马克上的空间和波长分辨可见光谱仪，利用CVI 5292-A（n = 8 - 7）电荷交换复合（CXR）谱线获得了离子温度分布。两组50通道光纤阵列布置在光谱仪的入口狭缝上，一组观察快速中性氢束（CXR通道），另一组观察中性束线（背景通道）。该光谱仪在焦平面处耦合到图像增强器和CCD检测器，并且每1/60秒提供一次温度分布。在减去同时测量的冷分量（背景通道）之后，从多普勒加宽的谱线轮廓导出离子温度，冷分量是由于等离子体外围中的电子激发和/或电荷交换复合。另一种方法来获得离子温度分布没有CXR也证明。该方法基于分别针对每个波长的Abel反演技术。
An ion temperature profile has been obtained with the CVI 5292‐A (n=8–7) charge‐exchange recombination (CXR) line using a space‐ and wavelength‐resolving visible spectrometer installed on the JIPP TII‐U tokamak. Two sets of 50‐channel optical‐fiber arrays, one viewing a fast neutral hydrogen beam (CXR channels) and the other viewing off the neutral beamline (background channels), are arranged on the entrance slit of the spectrometer. This spectrometer is coupled to an image intensifier and CCD detector at the focal plane, and provides a temperature profile every 1/60 s. An ion temperature is derived from the Doppler‐broadened line profile after subtracting the simultaneously measured cold component (background channels), which is due to electron excitation and/or charge‐exchange recombination in the plasma periphery. An alternative approach to obtain the ion temperature profile without CXR is also demonstrated. This method is based on an Abel inversion technique for each wavelength separately.