摘要
为探索用于原子蒸气激光同位素分离 (AVLIS)的简单有效的离子引出方法 ,用二维 particle in cellwithMonteCarlocollision(PIC MCC)模拟比较了多种方法 :平行板电场法 ,Π型电极法 ,改进M型电极法 ,radiofrequency(RF)共振法 .模拟发现 ,磁场为零时的RF共振法不论从离子引出时间还是从碰撞损失率看都是几种方法中最好的 ;其次是改进M型电极法 .Π型电极法的模拟结果与 2维电子平衡流体模型的结果相差悬殊 .RF共振法在有无磁场的不同条件下 ,有着相当大的差别 .磁场为零时 ,模拟中出现了强烈的共振 ;而在弱磁场条件下 ,模拟中没有发现明显的共振现象 .这个结果与弱磁场条件下 1维的PIC模拟中相当强的共振完全不同 .就实际应用来看 ,磁场为零条件下的RF共振法和改进M型电极法各有优缺点 。
To explore more simple and efficient ion extraction methods used in atomic vapor laser isotope separation (AVLIS),two\|dimensional(2D) PIC-MCC simulation code is used to simulate and compare several methods: parallel electrode method,Π type electrode method,improved M type electrode method,and radio frequency (RF) resonance method.The simulations show that,the RF resonance method without magnetic field is the best among others,then the improved M type electrode method.The result of simulation of Π type electrode method is quite different from that calculated by 2D electron equilibrium model.The RF resonance method with or without magnetic field has guite different results.Strong resonance occurs in the simulation without magnetic field,whereas no significant resonance occurs under weak magnetic field.And that is quite different from the strong resonance phenomena occurving in the 1D PIC simulation with weak magnetic field.As for practical applications,the RF resonance method without magnetic field has pros and cons, compared with the M type electrode method.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2000年第12期2420-2426,共7页
Acta Physica Sinica
基金
国家"九五"科技攻关项目!(批准号 :96 A18 0 1 0 2 )资助的课题&&
