文档介绍：真空科学与技术学报
Chinese Journal of Vacuum Science and Technology
ISSN 1672-7126,CN 11-5177iangmei*, GAO Xiaoyan, HU Yi, MA Huicong, CUI Chenghe, ZHOU Jun
(Southwestern Institute of Physical, Chengdu 610025, China)
Abstract In order to control the plasma impurity during plasma discharge, a real-time siliconization system
was built on HL-2A tokamak. Piezoelectric valve was employed to control the injection flow rate, and control
sequence of the HL-2A central control system was utilized as trigger signal. The gas injection function and the
sequential control were tested and proven with good stability and repeatability. Preliminary real-time
siliconization experiment with different injection parameters was performed under HL-2A divertor and limiter
plasma discharge condition, to study their impact on the plasma parameters. The experiment results show that the
total line-average density increases after gas injection, while Dα and SiV only increase during injection phase. A
short width injection pulse with high amplitude causes larger perturbation on the plasma rather than a long width
pulse with low amplitude, indicating that long width pulse wi