Evaluation of NBI absorption and fast ion stored energy to improve thermal energy confinement time calculation in EAST

Xiang GU (顾翔); Biao SHEN (沈飙); Jinping QIAN (钱金平); Siye DING (丁斯晔); Hongfei DU (杜红飞); Youwen SUN (孙有文); Binjia XIAO (肖炳甲); Bin WU (吴斌); Jinfang WANG (王进芳); Juan HUANG (黄娟); Jiale CHEN (陈佳乐); Kai LI (李凯); Guoqiang LI (李国强); Dalong CHEN (陈大龙); Shuliang CHEN (陈树亮); Muquan WU (吴木泉)

doi:10.1088/2058-6272/ab4cad

Plasma Science and Technology > 2020 > 22(2): 25103-025103. > DOI: 10.1088/2058-6272/ab4cad

Xiang GU (顾翔), Biao SHEN (沈飙), Jinping QIAN (钱金平), Siye DING (丁斯晔), Hongfei DU (杜红飞), Youwen SUN (孙有文), Binjia XIAO (肖炳甲), Bin WU (吴斌), Jinfang WANG (王进芳), Juan HUANG (黄娟), Jiale CHEN (陈佳乐), Kai LI (李凯), Guoqiang LI (李国强), Dalong CHEN (陈大龙), Shuliang CHEN (陈树亮), Muquan WU (吴木泉). Evaluation of NBI absorption and fast ion stored energy to improve thermal energy confinement time calculation in EAST[J]. Plasma Science and Technology, 2020, 22(2): 25103-025103. DOI: 10.1088/2058-6272/ab4cad

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Evaluation of NBI absorption and fast ion stored energy to improve thermal energy confinement time calculation in EAST

¹ Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, People's Republic of China
² University of Science and Technology of China, Hefei 230026, People's Republic of China

Funds: The work is supported by National MCF Energy R&D Program of China (Nos. 2018YFE0302100, 2017YFE0301100), National Natural Science Foundation of China (Nos. 11775262, 11975274, 11805237, 11705239), the National Magnetic Confinement Fusion Science Program of China (No. 2015GB102000).

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Received Date: July 11, 2019
Revised Date: October 08, 2019
Accepted Date: October 09, 2019

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Abstract

Abstract

The absorption of neutral beam power and the fast ion stored energy in EAST plasmas with neutral beam injection (NBI) is analyzed to improve the calculation of thermal energy confinement time. The neutral beam power absorption and fast ion stored energy are systematically calculated using the TRANSP code, through the investigation of global parameters including plasma current, line averaged density and beam energy. Results have shown that scaling laws for the NBI absorption coefficient and fast ion energy rate are obtained through statistical analysis. A comparison of the confinement improvement factor H_98y2 with these new scaling laws against those assuming fixed coefficients is given.
- thermal energy confinement time,
- neutral beam absorption,
- fast ion energy

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References (13)

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