Estimation of secondary electron emission coefficients of electrodes in barrier discharges

2016 Fiscal Year Final Research Report

• Project/Area Number: 26820108
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Power engineering/Power conversion/Electric machinery
• Research Institution: 防衛大学校(総合教育学群、人文社会科学群、応用科学群、電気情報学群及びシステム工学群)
• Principal Investigator: Yoshinaga Tomokazu 防衛大学校(総合教育学群、人文社会科学群、応用科学群、電気情報学群及びシステム工, 応用科学群, 講師 (30467899)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 二次電子放出係数 / 計算機シミュレーション / パッシェン曲線

Outline of Final Research Achievements

Breakdown voltage characteristics (Paschen curves) in Townsend discharges are often used to estimate secondary electron emission (SEE) coefficients of cathode materials. The gamma effect deduced from the conventional methodology, which gives secondary electron flux per ion flux flowing onto the cathode surface, includes the effects of back-scattering effects as well as photoemission effects and depends on the external electric field. In the present study, a different estimation method of electric-field-independent SEE coefficient is attempted by counting the collision events of electrons by Monte Carlo simulation and by a simple one-dimensional model. The Paschen curve obtained using the estimated gamma agreed well with the literature values of Wittenberg et. al.

Free Research Field

プラズマ物性物理学