Electric field emission of electrons from spherical metallic dust particles
Electric field emission of electrons from spherical metallic dust particles
复制标题
球形金属尘埃颗粒的电子电场发射
DOI：
10.1139/p08-144
复制
发表时间：
2009
影响因子：
1.2
通讯作者：
S. K. Agarwal
中科院分区：
文献类型：
--
作者：
M. Sodha;A. Dixit;S. K. Agarwal
本文导出了由于球形金属粒子上带负电荷而使电子穿过势垒的隧穿概率的一个几乎精确的表达式，并用于从粒子表面获得场发射电流密度。基于这些结果，对该现象进行了参数分析，并与Jeffreys-Wentzel-Kramers-Brillouin （JWKB）近似（类似于Fowler-Nordheim理论）的结果进行了比较。可见，JWKB理论低估了隧穿概率。这项研究与太空和实验室中的尘埃等离子体有关。
In this paper, an almost exact expression for the tunneling probability of an electron through the potential barrier on account of a negative charge on a spherical metallic particle has been derived and used to obtain the field emission current density from the surface of the particle. Based on these results a parametric analysis of the phenomenon and comparison with the results of the Jeffreys–Wentzel–Kramers–Brillouin (JWKB) approximation (similar to the Fowler–Nordheim theory) has been presented. It is seen that the JWKB theory underestimates the tunneling probability. The investigation is of relevance to dusty plasmas in space and in the laboratory.