基于两种数值模拟方法的ASDEX电离规灵敏度研究  

ASDEX Ionization Gauge Sensitivity Study Based on Two Numerical Simulation Methods

作　　者：黄俊 王国栋 张航 吴俊 陈长琦 HUANG Jun;WANG Guodong;ZHANG Hang;WU Jun;CHEN Changqi(Department of vacuum engineering,School of Mechanical Engineering,Hefei University of Technology,Hefei 230009,China)

机构地区：[1]合肥工业大学机械工程学院真空工程系,合肥230009

出　　处：《真空科学与技术学报》2022年第12期890-895,共6页Chinese Journal of Vacuum Science and Technology

基　　金：安徽省高等学校省级质量工程资助项目(4116000024)。

摘　　要：ASDEX电离规因其特殊的电极结构,可在高磁场、高温等离子体的聚变复杂环境下工作,被广泛应用于国内外核聚变装置。本文基于蒙特卡洛模拟法与电子路径积分法的数值模拟方法,分别研究了电极电压和磁场环境对电离规灵敏度及其电子运动轨迹的影响。研究表明:在无磁场条件下,随着加速栅极电压从160 V增加到430 V,灵敏度和电子平均轨迹长度先增大后减小;随着控制极电压从75 V增加到180 V,灵敏度先增加而后持续减小,电子发散程度先减小后增大。在磁场条件下,各电极的电子收集率随磁感应强度的增加急剧变化,并在0.1 T后趋于稳定。磁感应强度为0.1 T时,随着磁场偏移角度从0°增加到30°时,灵敏度缓慢衰减20%;若磁场偏移角度超过30°时,则灵敏度的衰减幅度迅速增加。The ASDEX ionization gauge is widely used in nuclear fusion devices because of its special electrode structure, which can work in the complex environment of fusion with high magnetic field and high temperature plasma. Based on the simulation methods of Monte Carlo and electron path integration, the effects of magnetic field environment and electrode voltage on the sensitivity and electron motion trajectory are investigated respectively. It is shown that as the accelerating gate voltage increases from 160 V to 430 V, the sensitivity and the average electron track length first increase and then decrease. As the control electrode voltage increases from 75 V to 180 V, the sensitivity increases and then decreases continuously, and the electron divergence first decreases and then increases.The electron collection rate of each electrode under the magnetic field changes sharply with the increase of magnetic induction intensity and stabilizes after 0.1 T. When the magnetic induction intensity reaches 0.1 T, the sensitivity decays slowly by 20% as the magnetic field offset angle increases from 0° to 30°. If the magnetic field offset angle exceeds 30°, the attenuation amplitude of sensitivity increases rapidly.

关 键 词：ASDEX电离规 灵敏度 电子轨迹 磁场 

分 类 号：TB772.3[一般工业技术—真空技术]