诊断中性束装置离子源起弧实验的多元非线性回归分析  

Multivariate nonlinear regression analysis of ion-source arcing testing parameters for DNB system

作　　者：陈长琦[1] 王保华[1] 刘智民[2] 刘胜[2] 许明亮[2] 胡纯栋[2] 

机构地区：[1]合肥工业大学机械与汽车工程学院,安徽合肥230009 [2]中国科学院等离子体物理研究所,安徽合肥230031

出　　处：《真空》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

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.

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 

分 类 号：O29[理学—应用数学] TB11[理学—数学]