2025-12-09 埼玉大学
図1 ストリーマ放電のダイナミクスを支配する電子密度（右上）と電界（右下）を
セットで直接計測することに成功
＜関連情報＞
- https://www.saitama-u.ac.jp/topics_archives/202512091500.html
- https://www.saitama-u.ac.jp/media/pr202512091500.pdf
- https://journals.aps.org/prl/abstract/10.1103/5sv6-28qp
大気圧空気中における二次ストリーマ放電中の電子密度と電界の直接複合測定 Direct Combinational Measurements of the Electron Density and Electric Field in Secondary Streamer Discharge under Atmospheric-Pressure Air
Yuki Inada, Tatsutoshi Shioda,Ryosuke Nakamura,Akiko Kumada,Mitsuaki Maeyama,Ryo Ono
Physical Review Letters Published: 8 December, 2025
DOI: https://doi.org/10.1103/5sv6-28qp
Abstract
The electron density and electric field govern physical and chemical reactions in a secondary streamer discharge under atmospheric-pressure air. We present direct combinational measurements of these essential quantities and demonstrate their consistency by solving the continuity equation for electrons. The measurements enabled validity examination of previous computational studies and clarified contradictions; the prominence was a near-cathode phenomenon measured during primary-to-secondary transition, which caused unpredicted ionization inside the positive secondary discharge. The thorough comparison revealed that a fundamental governing mechanism to be established for the secondary discharge is current continuity.
