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Elucidation of the generating mechanism of diffuse barrier discharge in air at atmospheric pressure

Research Project

Project/Area Number 19K04360
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 21010:Power engineering-related
Research InstitutionKanazawa Institute of Technology

Principal Investigator

OSAWA Naoki  金沢工業大学, 工学部, 教授 (40454227)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2021: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2019: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Keywords大気圧タウンゼント放電 / 誘電体バリア放電 / 表面電荷密度測定 / 放電観察 / 低侵襲な大気圧プラズマ源 / 誘電体表面抵抗率 / 表面電荷密度分布 / 均一バリア放電 / 表面電荷密度 / 表面電位 / ストリーマ放電 / 誘電体表面の電荷 / 大気圧空気 / 壁電荷 / 表面抵抗
Outline of Research at the Start

バリア放電は,オゾンの生成や高分子材料の表面改質だけではなく,癌細胞の死滅,皮膚疾患の治療,農作物の収率改善,鮮度維持など医療・農業分野にも応用されつつある。これらの分野では,患者の身体的負担や生体組織へのダメージを抑制する方法が切望される。本研究では,任意のタイミングで交流高電圧を遮断できる電源装置や誘電体表電荷計測システムを用いて,均一バリア放電発生中の誘電体表面電荷特性,交流電圧印加直後から均一バリア放電が安定発生するまでの誘電体表面電荷特性,誘電体表面抵抗や体積抵抗が均一バリア放電の発生や誘電体表面電荷特性に及ぼす影響を明らかにし,低侵襲な医療・農業用バリア放電装置を開発に貢献する。

Outline of Final Research Achievements

In this research, we investigated the generation mechanism of Atmospheric Pressure Townsend Discharge (APTD) in air as a minimally invasive atmospheric pressure plasma source. We analyzed the surface charge density characteristics before and after APTD generation using a programmable high-voltage power source and a surface charge scanning system. The important findings are as follows. (1) APTD generates in air when the negative charge density accumulated on the barrier surface is high using specific alumina barrier. (2) The surface resistivity of barrier, which generates APTD, can be decreased by 3 orders of magnitude by spraying water mist on the barrier surface. (3) If we use the barrier with decreased surface resistivity by water mist spraying method, APTD generation becomes unstable. These results suggested that surface resistivity of barrier material plays an important role for stable generation of APTD in air.

Academic Significance and Societal Importance of the Research Achievements

本研究は,高純度窒素を使用しない新しいAPTDの発生メカニズムを解明し,空気中でもAPTDを安定して発生できる方法を提供するものである。これにより,患者の身体的負担や生体組織へのダメージを抑制できる低侵襲な医療・農業用バリア放電装置の開発に貢献できる。

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (11 results)

All 2022 2021 2020 2019 Other

All Presentation (8 results) (of which Int'l Joint Research: 3 results) Remarks (3 results)

  • [Presentation] 表面抵抗率と大気圧空気中での均一バリア放電の関係2022

    • Author(s)
      渡部佳月,山田幸四朗,大澤直樹
    • Organizer
      2022 年度静電気学会春期講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Effect of Pre-discharge on Diffuse Dielectric Barrier Discharge Generation in Atmospheric Pressure Air2021

    • Author(s)
      Kazuki Watanabe, Naoki Osawa
    • Organizer
      International Young Electrostatic Scholar Symposium for Convergence Technology 2021
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 表面電荷密度と大気圧均一バリア放電の関係2021

    • Author(s)
      渡部佳月・大木貴智・木下赳流・大澤直樹
    • Organizer
      第22回静電気学会春期講演会
    • Related Report
      2020 Research-status Report
  • [Presentation] 大気圧空気中での均一バリア放電現象の解明 -電圧印加サイクル数と均一バリア放電発生の関係-2020

    • Author(s)
      渡部佳月・大木貴智・木下赳流・大澤直樹・吉岡芳夫
    • Organizer
      第44回静電気学会全国大会
    • Related Report
      2020 Research-status Report
  • [Presentation] 半球棒電極とアルミナ被覆平板電極を用いた大気圧空気中での均一バリア放電の発生と表面電位分布の回転対称性2019

    • Author(s)
      渡部佳月・五十村健汰・大澤直樹・吉岡芳夫
    • Organizer
      2019年電気情報・情報関係学会北陸支部連合大会
    • Related Report
      2019 Research-status Report
  • [Presentation] 半球棒対アルミナ被覆平板電極を用いた大気圧空気中でのタウンゼント放電(APTD)発生メカニズムの解明-APTDの安定発生とストリーマ放電の観察-2019

    • Author(s)
      五十村健汰・髙尾渉・大澤直樹・吉岡芳夫
    • Organizer
      令和元年 電気学会 基礎・材料・共通部門大会
    • Related Report
      2019 Research-status Report
  • [Presentation] Development in diffuse and filamentary barrier discharge in atmospheric pressure air by a hemispherical tip SUS rod and alumina coated plane electrode system2019

    • Author(s)
      Kenta Isomura, Wataru Takao, Kazuki Watanabe, Naoki Osawa, Yoshio Yoshioka
    • Organizer
      the 4th International Symposium on New Plasma and Electrical Discharge Applications; and on Dielectric Materials (ISNPEDADM)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Calculated 2-dimensional structure of surface charge density on barrier plate before and after diffuse dielectric barrier discharge in atmospheric pressure air2019

    • Author(s)
      Naoki Osawa, Kazuki Watanabe, Kenta Isomura, Yoshio Yoshioka
    • Organizer
      The 11th Asia-Pacific International Symposium on the Basics and Applications of Plasma Technology (APSPT-11)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Remarks] 金沢工業大学 研究室ガイド 大澤直樹 研究室

    • URL

      https://kitnet.jp/laboratories/labo0048/index.html

    • Related Report
      2021 Annual Research Report
  • [Remarks] research map(大澤直樹)

    • URL

      https://researchmap.jp/read0095501

    • Related Report
      2020 Research-status Report
  • [Remarks] 金沢工業大学 教育・研究業績 大澤直樹

    • URL

      https://kitap01.kanazawa-it.ac.jp/researcherdb/gyousekiIndex/GIAHABI_0001.html

    • Related Report
      2019 Research-status Report

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Published: 2019-04-18   Modified: 2023-01-30  

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