Development of Fast Charge Exchange Recombination Spectroscopy by Using Interference Filter Method in JT-60U
Development of Fast Charge Exchange Recombination Spectroscopy by Using Interference Filter Method in JT-60U
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DOI：
10.1585/jspf.79.1043
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发表时间：
2003-10
期刊：
影响因子：
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通讯作者：
Kobayashi Shinji;Sakasai Akira;Koide Yoshihiko;Sakamoto Yoshiteru;Kamada Yutaka;Hatae Takaki;Oyama Naoyuki;Miura Yukitoshi
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文献类型：
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作者：
Kobayashi Shinji;Sakasai Akira;Koide Yoshihiko;Sakamoto Yoshiteru;Kamada Yutaka;Hatae Takaki;Oyama Naoyuki;Miura Yukitoshi
报道了干涉滤光片法快速电荷交换复合光谱（CXRS）的最新进展和结果。为了高时间分辨率地测量坍缩或跃迁现象下离子温度和旋转速度的快速变化，在JT-60 U托卡马克CXRS诊断中采用了两种干涉滤光片系统。可以使用具有稍微不同的中心波长的三个干涉滤光器来确定CXR发射的多普勒展宽和多普勒频移。提出了一种无需非线性最小二乘拟合的温度和转速快速估计方法。通过对三滤光片系统的改进，使CXRS系统的最小时间分辨率提高到0.8ms，优于JT-60 U CCD探测器的CXRS系统的16.7ms。另一个系统具有七个波长通道是新制造的，以交叉检验由三个滤波器组件获得的结果，即，以验证CXR发射在塌陷现象下形成高斯分布。在具有巨边缘局域模的H模放电中，比较了两种系统的结果。三个过滤器系统的适用性的温度和转速的快速变化的测量被证明。
Recent developments and results of fast charge exchange recombination spectroscopy (CXRS) using interference filter method are reported. In order to measure the rapid change of the ion temperature and rotation velocity under collapse or transition phenomena with high-time resolution, two types of interference filter systems were applied to the CXRS diagnostics on the JT-60U Tokamak. One can determine the Doppler broadening and Doppler shift of the CXR emission using three interference filters having slightly different center wavelengths. A rapid estimation method of the temperature and rotation velocity without non-linear least square fitting is presented. The modification of the three-filters system enables us to improve the minimum time resolution up to 0.8 ms, which is better than that of 16.7 ms for the conventional CXRS system using the CCD detector in JT-60U. The other system having seven wavelength channels is newly fabricated to crosscheck the results obtained by the three-filters assembly, that is, to verify that the CXR emission forms a Gaussian profile under collapse phenomena. In a H-mode discharge having giant edge localized modes, the results obtained by the two systems are compared. The applicability of the three-filters system to the measurement of rapid changes in temperature and rotation velocity is demonstrated.