Wei ZHAO (赵伟), Lin NIE (聂林), Longwen YAN (严龙文), Min XU (许敏), Rui KE (柯锐), Jie YANG (阳杰), Zhipeng CHEN (陈志鹏), Zhanhui WANG(王占辉), Yali WANG (王雅丽), J-TEXT Team. Experimental study of sheath potential coefficient in the J-TEXT tokamak[J]. Plasma Science and Technology, 2021, 23(3): 35102-035102. DOI: 10.1088/2058-6272/abd917
Citation:
Wei ZHAO (赵伟), Lin NIE (聂林), Longwen YAN (严龙文), Min XU (许敏), Rui KE (柯锐), Jie YANG (阳杰), Zhipeng CHEN (陈志鹏), Zhanhui WANG(王占辉), Yali WANG (王雅丽), J-TEXT Team. Experimental study of sheath potential coefficient in the J-TEXT tokamak[J]. Plasma Science and Technology, 2021, 23(3): 35102-035102. DOI: 10.1088/2058-6272/abd917
Wei ZHAO (赵伟), Lin NIE (聂林), Longwen YAN (严龙文), Min XU (许敏), Rui KE (柯锐), Jie YANG (阳杰), Zhipeng CHEN (陈志鹏), Zhanhui WANG(王占辉), Yali WANG (王雅丽), J-TEXT Team. Experimental study of sheath potential coefficient in the J-TEXT tokamak[J]. Plasma Science and Technology, 2021, 23(3): 35102-035102. DOI: 10.1088/2058-6272/abd917
Citation:
Wei ZHAO (赵伟), Lin NIE (聂林), Longwen YAN (严龙文), Min XU (许敏), Rui KE (柯锐), Jie YANG (阳杰), Zhipeng CHEN (陈志鹏), Zhanhui WANG(王占辉), Yali WANG (王雅丽), J-TEXT Team. Experimental study of sheath potential coefficient in the J-TEXT tokamak[J]. Plasma Science and Technology, 2021, 23(3): 35102-035102. DOI: 10.1088/2058-6272/abd917
1 Southwestern Institute of Physics, Chengdu 610041, People’s Republic of China 2 College of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, People’s Republic of China
Funds: This work is supported by the National Key Research and Development Program of China (No. 2018YFE0309103), National Natural Science Foundation of China (Nos. 11875020, 11705052, 11875124 and U1867222), the ITER Organization and China Domestic Agency for the support of this work (ITER5.5.P01.CN.05).
Sheath potential coefficient α is a key parameter, which is used to estimate plasma potential (Vp) for edge plasma physics study. Recently, a series of experiments has been carried out under hydrogen plasmas in the J-TEXT tokamak with swept probe, which is employed for current– voltage (I–V ) characteristic measurement. Electron temperature is evaluated from I–V curve by three-parameter fitting method, and the electron energy probability function shows that electron distribution is Maxwellian both outside and inside of last closed flux surface (LCFS). Plasma potential is obtained by crossing point between I–V exponential fitting curve and electron saturation current extrapolating line, which is in good agreement with first derivative probe technique. The α coefficient profile in the vicinity of the LCFS is obtained, which is in the range of 2.1–3, and decreases from outside to inside of LCFS.
Li, R., Huang, T., Yu, M. et al. Local wavelength evolution and Landau damping of electrostatic plasma wave driven by an ultra-relativistic electron beam in dense inhomogeneous plasma. Plasma Science and Technology, 2023, 25(7): 075001.
DOI:10.1088/2058-6272/acb31e
DownLoad: