变极板间距的平行板离子引出的实

离子引出的研究在原子蒸气法激光同位素分离(AVLIS)工程中具有重要意义,离子引出时间直接关系到整个系统的离子引出效率。平行板静电场法是AVLIS离子引出中最基本的内容。利用由YAG四倍频脉冲激光(266 nm)多光子电离产生的空气等离子体进行离子引出实验,研究离子引出时间的变化规律。通过对实验数据的分析,发现离子引出时间随极板间距增大而增加,随引出电压变大而减小,验证了离子引出时间的经验公式,发现影响离子引出时间更本质的因素是平行板间电场强度。

Experimental Study on Ion Extraction Process by Electrostatic Field between Two Parallel Plates with Adjustable Distance

Ion extraction from laser-induced plasma is one of the key problems in atomic vapor laser isotope separation(AVLIS).Ion extraction by electrostatic field between two plates is the basic method for AVLIS.Experiments of ion extraction of air plasmas produced by the fourth harmonics of a YAG laser(266 nm) were carried out.The influences of applied voltage and plates distance on the ion extraction process were discussed and a scaling relation was proposed.The ion extraction time decreases with the increase of electric field intensity.