摘要
在HL-1装置上进行混合气体H_2+H_e,H_2+N_e,H_2+K_r和N_2+X_e交流(50Hz)放电锻炼孔栏(1/8石墨,7/8钼)和GH39不锈钢真空室表面,其清洗效果明显地好于通常低功率纯氢气放电清洗(TDC,GDC和ECR-DC),并能有效地降低裸金属和碳化器壁表面氢气体库贮量,有利于托卡马克放电氢再循环控制,为高密度和低q放电提供了洁净的器壁和环境。上述混合气体交流放电结合2.45GHz电子回旋共振(ECR)放电,取得了更好的清洗效果。本文对这种高效、快速清洗方法的机制作了简单分析。
By using AC(50Hz) discharge, the limiter, made of molybdenum and graphite,and stainless steel surfaces were conditioned in the HL-1 Tokamak filled with hydrogen or mixed gas (hydrogen with any kind of the rare gases.-helium, neon, krypton or xenon).The cleaning effects of mixed gas discharge are much better than that from regular low power discharge cleanings (TDC, GDC and ECR-DC). The total residual gas partial pressure released immediately after Hs + Kr mixed gas AC(50Hz)-DC decreases by a factor of 4 in comparison with that after pure hydrogen discharge. It can also dissorb hydrogen in the near-surface layers of bare or carbonized matal,leading to a better hydrogen recycling control in subsequent hydrogen discharges. The effects of mixed gas AC(50Hz)-DC in combination with 2.4 GHz ECR-DC are better than that from either of them separately.
出处
《核聚变与等离子体物理》
CAS
CSCD
北大核心
1991年第2期85-91,共7页
Nuclear Fusion and Plasma Physics
关键词
组合放电清洗
混合气体
HL-1装置
Combinatioa discharge cleaning, Rare gas, Hydrogen recycling.
