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STUDIES ON MICROSCOPIC STRUCTURES FOR PRODUCTION/DISAPPEARANCE MECHANISMS OF LASER-INDUCED PLASMA AND DYNAMICS DURING LASER-INDUCED DISCHARGE

Research Project

Project/Area Number 05402038
Research Category

Grant-in-Aid for General Scientific Research (A)

Allocation TypeSingle-year Grants
Research Field 電力工学・電気機器工学
Research InstitutionFUKUOKA INSTITUTE OF TECHNOLOGY (1994)
Kyushu Tokai University (1993)

Principal Investigator

AKAZAKI Masanori  FUKUOKA INSTITUTE OF TECHNOLOGY PRESIDENT, 学長 (30037676)

Co-Investigator(Kenkyū-buntansha) OKANO Daisuke  KYUSHU TOKAI UNIVERSITY,SCHOOL OF ENGINEERING ASSOCIATE PROFESSOR, 工学部, 助教授 (00169129)
SONODA Yoshito  KYUSHU TOKAI UNIVERSITY,SCHOOL OF ENGINEERING PROFESSOR, 工学部, 教授 (90117143)
TSUTSUMI Tadahito  KYUSHU TOKAI UNIVERSITY,SHCOOL OF ENGINEERING PROFESSOR, 工学部, 教授 (60248606)
Project Period (FY) 1993 – 1994
Project Status Completed (Fiscal Year 1994)
Budget Amount *help
¥12,400,000 (Direct Cost: ¥12,400,000)
Fiscal Year 1994: ¥1,300,000 (Direct Cost: ¥1,300,000)
Fiscal Year 1993: ¥11,100,000 (Direct Cost: ¥11,100,000)
KeywordsLaser Induced Lightning / Discharge in Atmospheric Air / Laser Diagnostics / Plasma / Electron Temperature / Electron Density
Research Abstract

The aim of this research is to find the successful conditions for laser-induced lightning, by understanding (1) the mechanism of ionization by excimer alsers in pure gases and (2) the formation mechanism of plasma produced by CO_2 laser in atmospheric air and (3) processes during laser-induced dicharge. For (1), experiments were done in different kind of ambient gas (air, N_2, O_2 of 100-1000mb in pressure) under an uniform DC electric field using Rogowski electrodes. Through electrical and optical measurements, it was found that oxygen molecules play an important role in characteristics of a laser-induced discharge. For (2) and (3), flashover induction experiments were perfomed for two types of long-gap electrode configurations, plate to rod and plate to plate, with a 50 J TEA CO_2 laser. From the flashover voltage characteristics and interferometric optical measurements on laser-induced plasma, it was found that the delay time for minimum V_<50> defined as 50% flashover voltage, measured from a laser incidence exists in the range of 50 to 200 mus, in laser-induced discharge of plate to rod, the value of V_<50> for negatively biased on the plate are larger than the case of positively biased, and laser-induced discharge does not occur on the surface of shock wave but relates on the low density region in the plasma produced by the laser.

Report

(3 results)
  • 1994 Annual Research Report   Final Research Report Summary
  • 1993 Annual Research Report
  • Research Products

    (29 results)

All Other

All Publications (29 results)

  • [Publications] F. Kinoshita: "Laser-Induced Sparkover in Atmospheric Air IV" Proceedings of the 7th Asian Conference on Electrical Discharge. 204-207 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] T.Tsuji: "Characteristics of Laser-Induced Discharge in Amospheric Air" Proceedings of the 7th Asian Conference on Electrical Discharge. 208-211 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] 池上知顕: "エキシマレーザによる放電誘導の特性" 電気学会論文誌 A. 114-A. 31-39 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] C.Honda: "Laser Breakdown Plasmas for Lightning Stroke Studies" Proc.of The 6th Int.Symp.on Laser-Aided Plasma Diagnostics. 277-282 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] C.Honda: "Laser-Induced Sparkover in Atmospheric Air III" Proc.of 6th Asian Conf.on Electric Discharge. 213-216 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] C.Honda: "A Study on Laser-Induced Discharge in Atmospheric Air (II)" Proc.of The 8th Int.Symp.on High Voltage Eng.3-72.02. 289-292 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] T.Ikegami: "Characteristics of Electrical Discharge Induced by Laser" Proc.of The 8th Int.Symp.on High Voltage Eng.1-35.01. 387-390 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] 本田親久: "レーザによる大気中の放電誘導特性" 電気学会論文誌 B. 113. 994-1002 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] F.Kinoshita: "Laser-Induced Sparkover in Atmospheric Air IV" Proceedings of the 7th Asian Conference on Electrical Discharge. 204-207 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] T.Tsuji: "Characteristics of Laser-Induced Discharge in Atmospheric Air" Proceedings of the 7th Asian Conference on Electrical Discharge. 208-211 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] T.Ikegami: "Characteristics of Electrical Discharge Induced by Excimer Laser" The Transactions of The Institute of Electrical Engineers of Japan. 114-1. 31-39 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] C.Honda: "Laser Breakdown Plasmas for Lightning Stroke Studies" Proceedings of The 6th International Symposium on Laser-Aided Plasma Diagnostics. 277-282 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] C.Honda: "Laser-Induced Sparkover in Atmospheric Air III" Proceedings of the 6th Asian Conference on Electrical Discharge. 213-216

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] C.Honda: "A Study on Lasdr-Induced Discharge in Atmospheric Air (II)" Proceedings of The 8th International Symposium on High Voltage Engineering. 3-72.02. 289-292 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] T.Ikegami: "Charcteristics of Electrical Discharge Induced by Excimer Laser" Proceedings of The 8th International Symposium on High Voltage Engineering. 1-35.01. 387-390 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] C.Honda: "Characteristics of Discharge Induced by Laser-Generated Plasmas in Atmospheric Air" The Transactions of The Institute of Electrical Engineers of Japan. 113-B. 994-1002 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] F.Kinoshita: "Laser-Induced Sparkover in Atmospheric Air IV" Proceedings of the 7th Asian Conference on Electrical Discharge. 204-207 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] T.Tsuji: "Characteristics of Laser-Induced Discharge in Atmospheric Air" Proceedings of the 7th Asian Conference on Electrical Discharge. 208-211 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] 池上知顕: "エキシマレーザによる放電誘導の特性" 電気学会論文誌 A. 114-A. 31-39 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] C.Honda: "Laser Breakdown Plasmas for Lightning Stroke Studies" Proc.of The 6th Int.Symp.on Laser-Aided Plasma Diagnostics. 277-282 (1993)

    • Related Report
      1994 Annual Research Report
  • [Publications] C.Honda: "Laser-Induced Sparkover in Atmospheric Air III" Proc.of 6th Asian Conf.on Electric Discharge. 213-216 (1993)

    • Related Report
      1994 Annual Research Report
  • [Publications] C.Honda: "A Study on Laser-Induced Discharge in Atmospheric Air(II)" Proc.of The 8th Int. Symp.on High Voltage Eng.3-72.02. 289-292 (1993)

    • Related Report
      1994 Annual Research Report
  • [Publications] T.Ikegami: "Characteristics of Electrical Discharge Induced by Laser" Proc.of The 8th Int.Symp.on High Voltage Eng.1-35.01. 387-390 (1993)

    • Related Report
      1994 Annual Research Report
  • [Publications] 本田親久: "レーザによる大気中の放電誘導特性" 電気学会論文誌B. 113. 994-1002 (1993)

    • Related Report
      1994 Annual Research Report
  • [Publications] C.Honda: "Laser Breakdown Plasmas for Lightning Stroke Studies" Proc.of The 6th Int.Symp.on Laser-Aided Plasma Diagnostics. 277-282 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] C.Honda: "Laser-Induced Sparkover in Atmospheric Air III" Proc.of 6th Asian Conf.on Electric Discharge. no.C-18. 213-216 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] C.Honda: "A Study on Laser-Induced Discharge in Atmospheric Air(II)" Proc.of The 8th Int.Symp.on High Voltage Eng.3-72.02. 289-292 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] T.Ikegami: "Characteristics of Electrical Discharge Induced by Laser" Proc.of The 8th Int.Symp.on High Voltage Eng.1-35.01. 387-390 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] 池上知顕: "エキシマレーザによる放電誘導の特性" 電気学会論文誌A. 114-A. 31-39 (1994)

    • Related Report
      1993 Annual Research Report

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Published: 1993-04-01   Modified: 2016-04-21  

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