Current collection by spherical Langmuir probes drifting in a collisionless plasma
Current collection by spherical Langmuir probes drifting in a collisionless plasma
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通过在无碰撞等离子体中漂移的球形朗缪尔探针进行电流收集
DOI：
10.1063/1.862395
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发表时间：
1978
影响因子：
4.6
通讯作者：
K. Kuriki
中科院分区：
文献类型：
--
作者：
H. Makita;K. Kuriki
实验研究了漂移球形朗缪尔探针在无碰撞等离子体中的电流-电压特性。为了找出探头速度对离子收集的影响，在旋转臂装置上进行了实验。利用该装置可以准确地确定探测速度和未扰动等离子体的性质。根据Kanal、Godard和Laframboise的理论预测，在较小的速度比下，离子电流随探测半径与德拜长度R/λD之比的增大而增大或减小，但对于探测速度变化的离子电流的绝对值，这些理论与本实验存在差异。这种差异被认为是由于势分布的不对称性造成的，而这些理论并不包括这种不对称性。
Current‐voltage characteristics of drifting spherical Langmuir probes have been studied experimentally in collisionless plasmas. In order to single out the effect of probe speed on the ion current collection, the experiment was carried out by a rotating arm facility. With this device the probe speed as well as the properties of the undisturbed plasma were accurately determined. As predicted by the theories of Kanal, Godard, and Laframboise, the ion current at small speed ratios was found to be either increased or decreased as the probe speed increased depending on the ratio of probe radius to Debye length R/λD. As for the absolute magnitude of ion current change by the probe speed, however, discrepancies were found between these theories and the present experiment. The difference is considered to originate from asymmetry in the potential distribution, which is not included in these theories.