Abstract Photodiodes masked with narrow-band filters have been used to obtain the temporal profiles of Hα and Hβ line emissions in the pre-ionization phase of hydrogen discharge in the MT-I Spherical Tokamak. The line ratio method relating the emission intensities of the above mentioned lines, having different excitation thresholds, provides the temporal profile of electron temperature. A triple Langmuir probe array having three individual sets of triple probes, arranged linearly, has also been used to measure the temporal profile of electron temperature at three different radial positions simultaneously. Additionally, a spectrometer HR4000+ is used to get the line-integrated emission intensity of H-Balmer lines. The objective of this experiment is to demonstrate the successful development of the optical and electric probe as a diagnostic tool for tokamak discharge.

中文翻译：

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在 MT-I 球形托卡马克的预电离放电中使用 Hα-Hβ 线发射和三重朗缪尔探针阵列对电子温度进行时间分析

摘要 用窄带滤波器掩蔽的光电二极管已被用于获得 MT-I 球形托卡马克中氢放电预电离阶段的 Hα 和 Hβ 线发射的时间分布。与具有不同激发阈值的上述线的发射强度相关的线比方法提供了电子温度的时间分布。三重朗缪尔探针阵列具有三组单独的三重探针，线性排列，也已用于同时测量三个不同径向位置的电子温度的时间分布。此外，光谱仪 HR4000+ 用于获得 H-Balmer 线的线积分发射强度。