摘要
通过调节影响诊断中性束离子源弧流的进气量、灯丝电流和弧压三个参量,进行了三组离子源起弧实验。建立了多元非线性回归模型,得到了三个参量对弧流的回归方程。回归分析表明,弧流对进气量和灯丝电流相当敏感,且有趋于饱和的特征,这与实验结果相吻合。在进气针阀开度492、灯丝总电流469A、弧压190V时重复起弧,均得到弧流170A以上、脉宽150ms的稳态放电,满足了诊断中性束流对弧流的要求。
Three sets of arcing tests were carried out by way of regulating three influencing parameters on the arc current of ion source for DNB (diagnostic neutral beam) system, ie. , air intake, filament current and arc voltage. A multivariate nonlinear regression model is therefore developed and, based on it, three regression equations are obtained correspondingly to show the effects of the three parameters on arc current. The results of regression analysis revealed that the arc current is quite sensitive to air intake and filament current and tends to saturation, which conforms to the measured results. In addition, the arcing action can be repetieive if the opening of air intake needle valve is 492, total filament current 469A and arc voltage 190V, thus resulting in a steady pulsate discharge to which the arc current is over 170A with pulse width 150ms. The arc current is therefore availabe to meet the requirement of diagnostic neutral beam.
出处
《真空》
CAS
北大核心
2007年第4期75-78,共4页
Vacuum
基金
国家自然科学基金项目(10575105)资助
关键词
诊断中性束
离子源
起弧实验
多元非线性回归
因素轮换法
diagnostic neutral beam
ion source
arcing test
multivariate nonlinear regression
factor rotation