Investigation of Ion Temperature Characteristics in the HT-7 Tokamak

LI Yingying; FU Jia; SHI Yuejiang; WANG Fudi; ZHANG Wei; TI Ang; XU Ping; HUANG Yiyu

Plasma Science and Technology > 2011 > 13(5): 535-540.

LI Yingying, FU Jia, SHI Yuejiang, WANG Fudi, ZHANG Wei, TI Ang, XU Ping, HUANG Yiyu. Investigation of Ion Temperature Characteristics in the HT-7 Tokamak[J]. Plasma Science and Technology, 2011, 13(5): 535-540.

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Investigation of Ion Temperature Characteristics in the HT-7 Tokamak

Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China

Funds: supported by the Instruments R&D Project of the Chinese Academy of Sciences (title: Active Beam Spectra Diagnostic), partially supported by National Natural Science Foundation of China ( Nos. 10725523, 10975155), the ITER Relevant Foundation in China _ (No. 2009GB104003).

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Received Date: January 10, 2011

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Abstract

Characteristics of ion temperature measured with Charge-Exchange Recombination Spectroscopy (CXRS) were studied in Ohmic, Lower-Hybrid-Wave (LHW) driven and Ion-Cyclotron-Resonance-Frequency (ICRF) heated plasmas in HT-7. The results indicate that the central ion temperature T_i0 follows the one-third power law in the product of central line-averaged density`n_e and plasma current I_p in Ohmic discharges and is therefore consistent with the Artsimovich scaling law T_i0= K× (I_p×B_t×`n_e ×R²)^1/3. It is shown that there is an appreciable increase of ion temperature during the operation with both LHW and ICRF and that the increment of ion temperature in those shots is mainly due to the energy transfer via collisions between ions and electrons rather that by direct heating of the ions.

Keywords:
charge exchange recombination spectroscopy,
ion temperature,
tokamak

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[1]	H ASHRAF, S Z A SHAH, H I A QAZI, M A KHAN, S HUSSAIN, M A BADAR, S NIAZ, M SHAFIQ. Electrical features of radio-frequency atmospheric pressure helium discharge with and without dielectric electrodes[J]. Plasma Science and Technology, 2019, 21(2): 25403-025403. DOI: 10.1088/2058-6272/aaede1
[2]	Yuanxiang ZHOU (周远翔), Zhongliu ZHOU (周仲柳), Ling ZHANG (张灵), Yunxiao ZHANG (张云霄), Yajun MO (莫雅俊), Jiantao SUN (孙建涛). Characterization and comprehension of corona partial discharge in air under power frequency to very low frequency voltage[J]. Plasma Science and Technology, 2018, 20(5): 54016-054016. DOI: 10.1088/2058-6272/aaa479
[3]	Muyang QIAN (钱沐杨), Gui LI (李桂), Sanqiu LIU (刘三秋), Yu ZHANG (张羽), Shan LI (李杉), Zebin LIN (林泽斌), Dezhen WANG (王德真). Effect of pulse voltage rising time on discharge characteristics of a helium–air plasma at atmospheric pressure[J]. Plasma Science and Technology, 2017, 19(6): 64015-064015. DOI: 10.1088/2058-6272/aa6154
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