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首页> 外文期刊>Plasma physics and controlled fusion >Lithium beam charge exchange diagnostic for edge ion temperature measurements at the ASDEX upgrade tokamak
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Lithium beam charge exchange diagnostic for edge ion temperature measurements at the ASDEX upgrade tokamak

机译：锂离子束电荷交换诊断，用于在ASDEX升级版tokamak上进行边缘离子温度测量

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Charge exchange recombination spectroscopy, utilizing a fast lithium beam as the recombination source, has been successfully applied to measuring edge ion temperature profiles of fully stripped carbon and helium ions in Ohmic, L-mode and H-mode plasmas with a radial resolution of about 6 mm. The temperatures of the carbon and helium ions agree within their respective experimental error bars in discharges where both could be measured. Depending on the plasma scenario, impurity content, beam penetration, etc, either helium or carbon can be the better choice for accurate edge measurements. The impact of edge localized modes (ELMs) on this diagnostic method has been noted. Temperature profiles in between ELMs can be determined as long as the ELM frequency is less than half the frame rate of the detector, i.e. less than about 60 Hz. In a first application, accurate measurements in L-mode plasmas with dominant electron heating and low density show much higher ion temperatures than electron temperatures across the separatrix.
机译：利用快速锂束作为重组源的电荷交换重组光谱技术已成功应用于径向分辨率约为6的欧姆，L模式和H模式等离子体中完全剥离的碳和氦离子的边缘离子温度分布测量毫米碳和氦离子的温度在各自的实验误差条中一致，可以测量两者。根据等离子体的情况，杂质含量，束穿透度等，氦或碳可能是进行精确边缘测量的更好选择。已经注意到边缘局部模式（ELM）对这种诊断方法的影响。只要ELM频率小于检测器帧频的一半，即小于约60 Hz，就可以确定ELM之间的温度曲线。在第一个应用中，在具有主要电子加热和低密度的L型等离子体中进行的精确测量显示，离子温度要比穿过皮层的电子温度高得多。

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