Measurement of electric field and gradient in the plasma sheath using clusters of floating microspheres.
Measurement of electric field and gradient in the plasma sheath using clusters of floating microspheres.
复制标题
使用漂浮微球簇测量等离子体鞘中的电场和梯度。
DOI：
10.1063/1.2437114
复制
发表时间：
2007
影响因子：
1.6
通讯作者：
K. Wells
中科院分区：
文献类型：
--
作者：
T. E. Sheridan;M. R. Katschke;K. Wells
本文介绍了一种用n = 2或3个已知质量的悬浮微球团簇测量等离子体鞘层中时均垂直电场及其梯度的方法。通过确定呼吸频率与水平（面内）振荡的质心频率之比来确定粒子电荷q。然后使用测量的荷质比计算粒子位置处的电场，并且从垂直谐振频率确定电场梯度。实验结果与简单鞘层模型一致。
A method for measuring the time-averaged vertical electric field and its gradient in the plasma sheath using clusters with n = 2 or 3 floating microspheres of known mass is described. The particle charge q is found by determining the ratio of the breathing frequency to the center-of-mass frequency for horizontal (in-plane) oscillations. The electric field at the position of the particles is then calculated using the measured charge-to-mass ratio, and the electric-field gradient is determined from the vertical resonance frequency. The Debye length is also found. Experimental results are in agreement with a simple sheath model.