Open AccessExperimental study of injection depth and fuelling effects during supersonic molecular beam injection on the HL-2A tokamak
Author(s) -
Shi Zhongbing,
Yao Lianghua,
X.T. Ding,
X.R. Duan,
Binhua Feng,
Zetian Liu,
Xiao Wei-wen,
Hongjuan Sun,
Li Xu,
Wei Li,
Chengyuan Chen,
Yue Jiao
Publication year - 2007
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.56.4771
Subject(s) - supersonic speed , molecular beam , materials science , beam (structure) , scaling , tokamak , atomic physics , hydrogen , plasma , cluster (spacecraft) , molecule , optics , thermodynamics , chemistry , physics , nuclear physics , geometry , mathematics , organic chemistry , computer science , programming language
The fuelling efficiency and injection depth are the fundamental problems of supersonic molecular beam fuelling. In the recent supersonic molecular beam injection (SMBI) experiments, the injection depths of SMBI have been found mainly dependent on the background electron density and temperature, the source gas pressure and temperature. The empirical scaling of SMBI depth was obtained at room temperature. Hydrogen clusters formed in the beam have been observed in the low temperature (source gas at liquid nitrogen temperature) SMBI experiments. It resulted in injection depth greater than 30 cm. Comparing the relationships between injection depths, plasma background parameters and molecular source temperature, the cluster formation phenomena during low temperature MBI are analyzed.