Plasma sheath material induced dependence due to secondary electron emission

V. Pigeon, N. Claire, C. Arnas, K. Terasaka, S. Inagaki

研究成果: Contribution to journalArticle査読

2 被引用数 (Scopus)


Plasma sheaths in front of six different material samples (BN, BNSiO2, Al2O3, SiO2, stainless steel, and silicon) used in various experiments and devices (Hall thrusters, plasma discharge, and microelectronics) are studied using the laser induced fluorescence diagnostic. The specific secondary electron emission (SEE) yield of each material is expected to induce differences in the sheath structure from one sample to another. The experiments are carried out in two different plasma discharges (multipolar device and ECR device), exhibiting distinct electron distribution functions: bi-Maxwellian and Maxwellian. The agreement between the two experiments is good and allows us to classify the materials in a consistent way regarding their SEE yields. The multipolar experiment results are compared to a 1D kinetic sheath model and a 1D-1 V kinetic sheath simulation code. The predictions of the model are discussed and are in good agreement with previous theory. The influence of the low energy impinging electrons on the SEE yield and emissive sheaths is investigated with the code.

ジャーナルPhysics of Plasmas
出版ステータス出版済み - 4 1 2020

All Science Journal Classification (ASJC) codes

  • 凝縮系物理学


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