Speaker
Mr
Deliang Yu
(China)
Description
Features of high fuelling efficiency of supersonic molecular beam injection (SMBI) have been studied on HL-2A tokamak. Normalized by fuel inventory, the D_alpha emission induced by SMBI is about 50% higher than that of gas puffing (GP), indicating that SMBI can send the fuel to the plasma edge more efficiently. And strong particle convection (inward pinch) is observed both by hydrogen cyanide (HCN) interferometer as the densities from core channels increasing whereas the edge channels decreasing during the post-fuelling phase and by the microwave reflectometry (MWR). By comparing the SMBI pulses with and without electron cyclotron resonance heating (ECRH), the pinch may be driven by the enhancement of normalized electron temperature gradient. It is observed that higher enhancement (up to twice) of normalized electron temperature gradient for SMBI than that for GP, and this may be another mechanism for higher fuelling efficiency of SMBI.
Country or International Organization of Primary Author
China
Primary author
Mr
Deliang Yu
(China)
Co-authors
Mr
Beibin Feng
(Southwestern Institute of Physics)
Mr
Chenghe Cui
(Southwestern Institute of Physics)
Mr
Chengyuan Chen
(Southwestern Institute of Physics)
Prof.
Jiaqi Dong
(Southwestern Institute of Physics; Institute for Fusion Theory and Simulation, Zhejiang University)
Dr
Jun Zhou
(Southwestern Institute of Physics)
Prof.
Lianghua Yao
(Southwestern Institute of Physics)
Prof.
Longwen Yan
(Southwestern Institute of Physics)
Prof.
Qingwei Yang
(Southwestern Institute of Physics)
Mr
Wulu Zhong
(Southwestern Institute of Physics)
Dr
Xiaoyu Han
(Southwestern Institute of Physics)
Prof.
Xuru Duan
(Southwestern Institute of Physics)
Prof.
Yan Zhou
(Southwestern Institute of Physics)
Prof.
Yi Liu
(Southwestern Institute of Physics)
Prof.
Yong Liu
(Southwestern Institute of Physics)
Prof.
Yuan huang
(Southwestern Institute of Physics)
Prof.
Zeng Cao
(Southwestern Institute of Physics)
Dr
Zhongbing Shi
(Southwestern Institute of Physics)
