HL-2A装置偏滤器室中性气体压强规  

Development of a fast ionization gauge in the HL-2A tokamak

作　　者：王明旭[1] 李波[1] 杨志刚[1] 严龙文[1] 张年满[1] 廖志清[1] 严东海[1] 郭建军[2] 

机构地区：[1]核工业西南物理研究院 [2]西华大学应用物理研究所

出　　处：《核聚变与等离子体物理》2005年第1期65-68,共4页Nuclear Fusion and Plasma Physics

基　　金：国家自然科学基金资助项目(10075017)

摘　　要：研制了一种可工作于强磁场、强干扰环境下的快响应真空电离规(快规)。介绍了快规的结构、原理、设计梗概和在HL 2A装置偏滤器室中原位测量中性气体压强的实验结果。无磁场时,在压强1×10-5～6×10-1Pa的范围内,快规的线性度良好,H2压强的测量上限为1.5Pa,He压强的测量上限为4Pa,覆盖了目前HL 2A装置偏滤器的运行范围;快规处磁感应强度在0 6T左右时,其灵敏度约提高至无磁场下的3倍。快规的响应时间小于4ms,并且具有较强的抗干扰能力。A fast ionization gauge in a strong magnetic field and noisy environment is developed for measuring the pressure in the divertor chamber of the HL-2A tokamak. The configuration, the principles, the design outlines of the fast gauge and the results obtained on the HL-2A tokamak are described. Without a magnetic field, the N2 pressure region of the fast gauge is from 6.4 × 10-6 to 0.6 Pa, and the ratio of ion current to electron current increases linearly with the pressure. The highest pressure measured by the fast ionization gauge is 1.5 Pa for H2 and 4 Pa for He. With magnetic field of 0.6 T, the sensitivity of the fast gauge increases by a factor of 3. The fast gauge has a fast time response less than 4 ms and has high noise rejection.

关 键 词：HL-2A装置 偏滤器 实验结果 响应 电离规 上限 强磁场 磁感应强度 气体压强 强干扰 

分 类 号：O536[理学—等离子体物理] TL631[理学—物理]