SECONDARY-EMISSION FROM SMALL DUST GRAINS AT HIGH ELECTRON ENERGIES

被引：104
作者：
CHOW, VW
MENDIS, DA
ROSENBERG, M
机构：
[1] Department of Electrical and Computer Engineering, University of California, La Jolla, CA, San Diego
来源：
IEEE TRANSACTIONS ON PLASMA SCIENCE | 1994年 / 22卷 / 02期
基金：
美国国家科学基金会; 美国国家航空航天局;
关键词：
Electric space charge - Electrodynamics - Electron beams - Electron tunneling - Electrons - Geometry - Grain size and shape - Ions - Mathematical models - Particles (particulate matter) - Plasmas;
D O I：
10.1109/27.279021
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
摘要：
A previous model for secondary electron emission from small grains [41 is modified to calculate yields for micron sized grains, both spherical and cylindrical, when the primary electrons constitute a high energy parallel beam. It is found that, in general, the secondary electron yield is significantly higher than for the case of normal incidence. Moreover, the equilibrium potentials of the grain are always positive due to this enhanced secondary emission. These results are compared with experimental data recently available for micron sized glass particles [16], and equilibrium potentials, calculated based on the model presented here, and are found to be in reasonably good agreement with their measured potentials.
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页码：179 / 186
页数：8
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