Investigation toward measuring density of charged particles by understanding of mechanism in bending phenomena in atmospheric pressure plasma jet

2021 Fiscal Year Final Research Report

• Project/Area Number: 19K14896
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 19010:Fluid engineering-related
• Research Institution: Nagano National College of Technology
• Principal Investigator: Hiromasa Yamada 長野工業高等専門学校, 電子制御工学科, 講師 (80825141)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: 大気圧プラズマジェット / シュリーレン計測 / 荷電粒子

Outline of Final Research Achievements

This study had been aimed to acquire information on charged particles which are one of the main characteristics of the plasma. Because of that, it was required that mechanisms of the bending phenomena in working gas flow occurred by application of external electric field to atmospheric pressure plasma jet were understood. Therefore, this study was performed for the purpose of clarifying the relationships between discharge conditions, time development of discharge phenomena, and bending phenomena by the external electric field. As the experimental conditions, polaritu of applied coltage waveform for discharge were changed. Moreover, the externla electric field were vertically applied to the plasma jet.
As result, it was clarified that plasma characteristics and behavior of the working gas flow, when the external electric field was applied, were changed with discharge conditions.

Free Research Field

大気圧プラズマ

Academic Significance and Societal Importance of the Research Achievements

本研究では、医療や農業等の様々な分野で応用が進められている大気圧プラズマジェットを対象に、そのガス流挙動に注目した研究を行い、プラズマを生成する条件によって外部電場存在下におけるガス流挙動が変化することを明らかにした。この結果は放電条件によってプラズマ中の荷電粒子の挙動が変化し、ガス流へと影響したことを示唆している。この成果は、今後のより詳細な解析により、荷電粒子密度情報の取得にもつなげることができ、さらに、ガス流挙動制御にも活用することが可能と考えている。これらが実現できれば大気圧プラズマジェットの様々な分野への応用を促進へとつながる。