Open AccessExperimental study of L-H transition triggered by supersonic molecular beam injection in the HL-2A tokamak
Author(s) -
Binhua Feng,
Yao Lianghua,
Chengyuan Chen,
X.Q. Ji,
Zhong Wu-Luuml;,
Z.B. Shi,
Dan Yu,
Cui Zhengying,
Song Xianming,
X.R. Duan
Publication year - 2013
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.62.015203
Subject(s) - supersonic speed , molecular beam , tokamak , beam (structure) , materials science , atomic physics , transition (genetics) , enhanced data rates for gsm evolution , power (physics) , physics , plasma , molecule , chemistry , thermodynamics , optics , nuclear physics , quantum mechanics , computer science , telecommunications , biochemistry , gene
Features of L-H transition are investigated using the supersonic molecular beam injection (SMBI) with directional velocity under low heating powers in the present paper. Comparing the edge density profiles, it is analyzed that the conventional gas puffing (GP) and SMBI have effects on L-H transition. Experimental results suggest that the SMBI does directly trigger L-H transition on HL-2A, and it considerably reduces the power threshold of L-H transition. After abundant experimental data are analyzed and processed, it is found that the minimum L-H transition power with SMBI decreases by 10% when it is compared with GP trigged H-mode under same conditions.