期刊
JOURNAL OF PHYSICS D-APPLIED PHYSICS
卷 50, 期 48, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1361-6463/aa91af
关键词
energy balance; electron emission; Hall thrusters; plasma modelling; electronsmaterial interactions
资金
- CNES research and technology Program
The energy balance measurement of electron emission at a wall submitted to electron impact at low incident energy is a topic of interest for miscellaneous technological applications. This article points out the experimental protocol, biases corrections and post-process needed to obtain reproducible and quantitative electron emission measurements. The measurements have been performed for incident electrons energy between 5 eV and 105 eV and for three samples materials: silver, graphite and SiO2. These measurements show that wall absorbs more energy at high incident electrons energy and that graphite absorbs more energy than silver, than SiO2. Results are presented for mono-energetic incident electron beam and for a Lambertian energy distribution. Analytical laws fitted from experimental results and applicable for modelling issue are proposed for a Lambertian distribution of incident electrons.
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