Open AccessPotential safe termination by laser ablation of high-Z impurity in the HL-1M tokamak
Author(s) -
Zheng Yongzhen,
Feng Xingya,
Yong Zheng,
Guo Gancheng,
Deming Xu,
Deng Zhongchao
Publication year - 2005
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.54.2809
Subject(s) - impurity , tokamak , plasma , materials science , atomic physics , ablation , current (fluid) , radiation , laser ablation , laser , physics , nuclear physics , optics , thermodynamics , medicine , quantum mechanics
A preliminary experiment for triggering a plasma current quench by means of injection of high_Z impurities has been performed on the HL_1M before the major disruption.Using injection of impurity with higher charge of the nuclei allows u s to increase the radiation cooling on a 3?ms time scale and the electronic tem perature loss contract is 80% before current terminates.It can be a simple and p otential approach to decrease significantly the plasma thermal energy and the ma gnetic field energy before a disruption and to a safe plasma termination.