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Elementary Study on Pulsed CO_2 Laser Induced Electrical Discharge through Plasma Produced by Linear Focused Beam Method in Atmospheric Air

Research Project

Project/Area Number 14550284
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 電力工学・電気機器工学
Research InstitutionKyushu Tokai University

Principal Investigator

OKANO Daisuke  Kyushu Tokai University, School of Engineering, Professor, 工学部, 教授 (00169129)

Project Period (FY) 2002 – 2003
Project Status Completed (Fiscal Year 2003)
Budget Amount *help
¥3,200,000 (Direct Cost: ¥3,200,000)
Fiscal Year 2003: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 2002: ¥2,700,000 (Direct Cost: ¥2,700,000)
KeywordsCO_2 laser / laser produced plasma / laser induced discharge / light collecting method / aerosol / discharge threshold / time lag of discharge / illuminative discharge path / レーザプラズマ
Research Abstract

§1.Introduction From the view point of understanding elementary knowledge about the laser induced lightning method, we focused on the dependences of laser power density (LPD) at focused points and aerosol particles on laser induced electrical discharges (LIED) with non-uniform DC electric filed in an atmospheric air. We studied on experimentally (1) inner plasma energy and (2) characteristics of LIED by using of the LPD difference between point-focused and linear-focused methods with aerosol conditions.
§2.Study on the behavior of pulsed laser produced plasma (PLPP) We measured electron temperature (T_e) and ion densitie (n_i) of a PLPP by a triple probe method of three ring chips with same surface area and high responsiveness-1μs. As the results, T_e was 4.4 eV and n_i was 〜10^<21> m^<-3> an illuminative PLPP at a point-focused position, and the plasma state was maintained more than 100μs without illuminating.
§3.Study on the characteristics of LIED with aerosol particles We studied on experimentally the characteristics of LIED with non-uniform DC electric filed in an atmospheric air with aerosol particles simulated by incense smog. The density distribution of simulated aerosol particles in a discharge gap was observed to be nearly uniform by a laser scattering method. The relative increased density was 6x10^5. As the results, the LIED occurred even though the laser power density was 1/700 compared with the threshold of air breakdown in a simulated aerosol condition, and the discharge path of LIED was nearly linear.

Report

(3 results)
  • 2003 Annual Research Report   Final Research Report Summary
  • 2002 Annual Research Report
  • Research Products

    (12 results)

All Other

All Publications (12 results)

  • [Publications] Daisuke Okano, Yusuke Miyazaki: "Measurements of CO_2 Laser-Induced Plasma Regions by Symmetric Triple Probe"Proceedings of 2002 Joint Conf.of ACED & K-J Symposium on ED and HVE. Vol.2. 459-465 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Daisuke Okano, Tsuyoshi Manako: "Electrical Discharge Induced by Linearly Focused Region of CO_2 Laser Beam"Proceedings of 2002 Joint Conf.of ACED & K-J Symposium on ED and HVE. Vol.1. 328-331 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Daisuke Okano, Atsushi Shigeta: "Study on CO_2 Laser-Produced Plasma Region by Symmetric Triple Probe with Ring Tips"Proceedings of 2003 J-K Joint Symposium on ED and HVE. 293-296 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Daisuke Okano, Shigeo Kusunose: "Computational Study on Behavior of Ionized Particles Produced by YAG Laser in Atmospheric Air Gap with Non-Uniform DC Electric Field"Proceedings of 2003 J-K Joint Symposium on ED and HVE. 105-108 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Daisuke Okano, Yusuke Miyazaki: "Measurements of CO_2 Laser-Induced Plasma Regions by Symmetric Triple Probe"Proceedings of 2002 Joint Conf.of ACED & K-J Symposium on ED and HVE. vol.2. 459-462 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Daisuke Okano, Tsuyoshi Manako: "Electrical Discharge Induced by linearly focused Region of CO_2 laser beam"Proceedings of 2002 Joint Conf.of ACED & K-J Symposium on ED and HVE. vol.1. 328-331 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Daisuke Okano, Atsushi Shigeta: "Study on CO_2 Laser-Produced Plasma Region by Symmetric Triple Probe with Ring Tips"Proceedings of 2003 J-K Joint Symposium on ED and HVE. vol.1. 293-296 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Daisuke Okano, Shigeo Kusunose: "Computational Study on Behavior of Ionized Particles Produced by YAG Laser in Atmospheric Air Gap with Non-Uniform DC Electric Field"Proceedings of 2003 J-K Joint Symposium on ED and HVE. vol.1. 105-108 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Daisuke Okano, Atsushi Shigeta: "Study on CO_2 Laser-Produced Plasma Region by Symmetric Triple Probe with Ring Tips"Proceedings of 2003 J-K Joint Symposium on ED and HVE. 293-296 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Daisuke Okano, Shigeo Kusunose: "Computational Study on Behavior of Ionized Particles Produced by YAG Laser in Atmospheric Air Gap with Non-Uniform DC Electric Field"Proceedings of 2003 J-K Joint Symposium on ED and HVE. 105-108 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Daisuke Okano, Yusuke Miyazaki: "Measurements of CO_2 Laser-Induced Plasma Regions by Symmetric Triple Probe"Proceedings of 2002 Joint Conf. of ACED & K-J symposium on ED and HVE. Vol.2. 459-462 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Daisuke Okano, Tsuyoshi Manako: "Electrical Discharge Induced by Linearly Focused Region of CO_2 Laser Beam"Proceedings of 2002 Joint Conf. of ACED & K-J symposium on ED and HVE. Vol.1. 328-331 (2002)

    • Related Report
      2002 Annual Research Report

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Published: 2002-04-01   Modified: 2016-04-21  

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