Paul阱中共线三离子体系的经典动力学  

CLASSICAL DYNAMICS OF THREE IONS WITH COLLINEAR CONFIGURATION IN A PAUL TRAP

作　　者：施磊[1,2] 段宜武[1,2] 冯芒[1,2] 朱熙文 方细明[1,2] 

机构地区：[1]中国科学院武汉物理与数学研究所波谱与原子分子物理国家重点实验室 [2]湖南师范大学物理系

出　　处：《物理学报》1998年第8期1248-1257,共10页Acta Physica Sinica

基　　金：国家自然科学基金

摘　　要：研究了在Ｐａｕｌ阱囚禁场赝势作用下共线构形的三离子体系经典动力学特性．尽管这是一个非线性体系，但不存在混沌，即体系在任何能量下运动都是规则的，而相空间则由两个轨迹为对称和反对称周期（或准周期）轨道的ＫＡＭ不变环面构成．体系的两条最简单的周期轨道Ｓ和Ａ的周期随能量Ｅ的下降而增大，并在Ｅ趋于体系的最小值Ｅｍｉｎ＝３０时分别为反对称和对称谐振动．Abstract We have studied the properties of the classical dynamics of three ions with collinear configuration in a Paul trap.We found that no chaotic motion exists,and the motions of the ions are regular at any given energy E .The trajectories of the ion ensemble in phase space are of the anti symmetric type and symmetric type periodic(or quasi periodic) orbits,which are constrained in two KAM tori respectively.The simplest trajectories of the ensemble are periodic orbit A and periodic orbit S .When E tends toward the minimum energy E min =3 0 of the ensemble,the motions of A orbits and S orbits tend towards the anti symmetric and symmetric harmonic oscillations,respectively.

关 键 词：三离子体系 PAUL阱 囚禁场 经典动力学 

分 类 号：O562.4[理学—原子与分子物理]