Confinement of Nonneutral Spheroidal Plasmas in Multi-Ring Electrode Traps
Confinement of Nonneutral Spheroidal Plasmas in Multi-Ring Electrode Traps
复制标题
多环电极陷阱中非中性球状等离子体的限制
DOI：
10.1143/jjap.37.664
复制
发表时间：
1998
影响因子：
1.5
通讯作者：
T. Michishita
中科院分区：
文献类型：
--
作者：
A. Mohri;H. Higaki;Hitoshi Tanaka;Yamazawa Yohei;M. Aoyagi;T. Yuyama;T. Michishita
在封闭的导电池中，当池壁表面的静电势分布等于外双曲线势（r2 - 2 z2）和等离子体产生的自势之和时，非中性的球状等离子体可以在刚性转子中稳定平衡，而不受池壁感应镜像电荷的影响.配备有一列适当偏置的环形电极的约束系统可以近似地产生任何轴对称电势，包括上述场。对电子球在该系统中的约束实验表明，当满足消除像电荷效应的条件时，电子球的约束时间最长。在这种结构中，观察到的等离子体的质心谐振频率与估计的频率吻合得很好。
A nonneutral spheroidal plasma can be settled in a rigid rotor equilibrium inside a closed conducting cell independently of induced image charges on the cell wall if the electrostatic potential distribution on the wall surface is set equal to the sum of the external hyperbolic potential (r2 - 2z2) and the self-potential produced by the plasma. A confinement system equipped with a train of properly biased ring electrodes can approximately generate any axisymmetric potential, including the above field. Experiments on confinement of electron spheroids in such a system showed that the confinement time became the longest when the condition to diminish the image charge effects was satisfied. The observed frequency of the centre-of-mass harmonic oscillation of the plasma in this configuration was in good agreement with the estimated one.