Analysis of the Gas Puffing Performance for Improving the Repeatability of Ohmic Discharges in the SUNIST Spherical Tokama

XIE Huiqiao(谢会乔); TAN Yi(谭熠); KE Rui(柯锐); WANG Wenhao(王文浩); GAO Zhe(高喆)

doi:10.1088/1009-0630/16/8/03

Plasma Science and Technology > 2014 > 16(8): 732-737. > DOI: 10.1088/1009-0630/16/8/03

XIE Huiqiao(谢会乔), TAN Yi(谭熠), KE Rui(柯锐), WANG Wenhao(王文浩), GAO Zhe(高喆). Analysis of the Gas Puffing Performance for Improving the Repeatability of Ohmic Discharges in the SUNIST Spherical Tokama[J]. Plasma Science and Technology, 2014, 16(8): 732-737. DOI: 10.1088/1009-0630/16/8/03

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Analysis of the Gas Puffing Performance for Improving the Repeatability of Ohmic Discharges in the SUNIST Spherical Tokama

Department of Engineering Physics, Tsinghua University, Beijing 100084, China

Funds: supported by National Natural Science Foundation of China (Nos. 10990214, 11175103, 11261140327 and 11075092), Ministry of Science and Technology (MOST) of China (Nos. 2013GB112001 and 2010GB107002) and Tsinghua University Initiative Scientific Research Program

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Received Date: August 07, 2013

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Abstract

Abstract

The gas puffing performance plays a key role in repeatable discharges in the Sino- UNIted Spherical Tokamak (SUNIST) experiments. In this paper, temporal evolution of the gas pressure in the vacuum vessel and the dependence of the repeatability of plasma discharges on different timing arrangements between the gas puffing pulse and the Ohmic field have been experimentally investigated. The results show that, after a fast rising phase, the gas pressure becomes quasi-stationary. In the regime of the discharges being started up when the gas pressure has already reached the quasi-stationary state for about 37 ms, an improved repeatability of the plasma discharges is achieved.
- gas puffing performance,
- repeatability of plasma discharges,
- SUNIST

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References (12)

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