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

作　　者：谢会乔 谭熠 柯锐 王文浩 高喆 

机构地区：[1]Department of Engineering Physics, Tsinghua University

出　　处：《Plasma Science and Technology》2014年第8期732-737,共6页等离子体科学和技术（英文版）

基　　金：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);Tsinghua University Initiative Scientific Research Program

摘　　要：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.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.

关 键 词：gas puffing performance repeatability of plasma discharges SUNIST 

分 类 号：TL631.24[核科学技术—核技术及应用] TN786[电子电信—电路与系统]