Emissive probe measurement of electron temperature in recombining plasma produced in the linear divertor simulator TPD-II

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• 作者：Matsubara ; Akihiro ; Sugimoto ; Tatsunori ; Shibuya ; Takehisa ; Kawamura ; Kazutaka ; Sudo ; Shigeru ; et. al.
• 关键词：P0600 ; 52.70.&minus ; m ; Divertor ; Detached recombining plasma ; Electron temperature ; Langmuir probe ; Emissive probe ; Spectroscopy
• 刊名：Journal of Nuclear Materials
• 出版年：2003
• 期刊代码：51_00223115
• 类别：ms
• 出版时间：March, 2003
• 卷：313-316
• 期：Complete
• 页码：720-724
• 文件大小：222 K

摘要

Emissive probe (EP) measurement of the electron temperature T_e, which was proposed by Shindo et al. [Rev. Sci. Instrum. 59 (1988) 2002] is applied to the measurement of T_e in the detached recombining plasma produced in the linear divertor simulator. In the determination of T_e by the EP method, we consider application limits based on the space-charge-limit effect studied by Ye and Takamura [Phys. Plasmas 7 (2000) 3457]. We have observed that as neutral pressure is increased for developing the plasma detachment, T_e obtained with the EP decreases from a few eV to 0.4 eV, on the other hand, the Langmuir probe (LP) method gives anomalously high T_e of 3–9 eV. The EP method yields more reliable value of T_e than the LP method does. The electron temperature obtained through the spectroscopic method is also shown.