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Plasma accelerator development using CO2 laser beat-wave.

Research Project

Project/Area Number 05452383
Research Category

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

Allocation TypeSingle-year Grants
Research Field プラズマ理工学
Research InstitutionOsaka University

Principal Investigator

KITAGAWA Yoneyoshi  Osaka University Institute of Laser Eng., Associate Professor, レーザー核融合研究センター, 助教授 (40093405)

Co-Investigator(Kenkyū-buntansha) TANAKA Kazuo  Osaka University Faculty of Eng., Associate Professor, 工学部, 助教授 (70171741)
TAKABE Hideaki  Osaka University Institute of Laser Eng., Associate Professor, レーザー核融合研究センター, 助教授 (20150352)
AZECHI Hiroshi  Osaka University Institute of Laser Eng., Associate Professor, レーザー核融合研究センター, 助教授 (90135666)
NISHIHARA Katsunobu  Osaka University Institute of Laser Eng., Professor, レーザー核融合研究センター, 教授 (40107131)
MIMA Kunioki  Osaka University Institute of Laser Eng., Professor, レーザー核融合研究センター, 教授 (30033921)
Project Period (FY) 1993 – 1994
Project Status Completed (Fiscal Year 1994)
Budget Amount *help
¥7,500,000 (Direct Cost: ¥7,500,000)
Fiscal Year 1994: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 1993: ¥6,400,000 (Direct Cost: ¥6,400,000)
KeywordsCO2 laser / Beatwave / Plasma wave / Thomson scattering / Raman scattering / Energy spectrum / ビート波 / レーザー加速 / トンネル電離
Research Abstract

We tried to obtain double line oscillation laser light from CO 2 laser of 300 ps rise and 350 J output for beatwave excitation of plasma wave. By using the double line laser we excited relativistic plasma wave in gas-puffed hydrogen plasmas. The purpose of this project is to accelerate injected electrons by this plasma wave.
(1) We tried to excite the plasma wave both for double line combination of 10.6 and 9.6 mum and of 10.6 and 10.3 mum. The resonant density is 1.1x10^<17>/cm^3 for the former combination and 9x10^<15>/cm^3 for the latter. We succeeded to produce plasmas in the laser duration through the tunneling ionization.
(2) We tried YAG laser Thomson scattering measurement of plasma waves, which enables us to obtain the time-resolved plasma wave amplitudes. A 2nd harmonic light from the YAG oscillator is injected perpendicularly to the CO2 laser axis. The side scattered YAG light are analyzed through spectrum analyzer to streak camera. For single line laser injection, we observed the plasma wave through backward Raman scattering. The plasma wave is excited only in 300ps just after the laser rise and its amplitude attains to 2% density perturbation, which can accelerate the plasma electrons more than 20 keV.We are now measuring the plasma wave excitation by double line injection CO2 laser..
(3) To measure the accelerated electron energy, we developed a field variable magnetic analyzer, which can detect electron from 0 to 30 MeV.We try now to compare the electron energy spectrum with the plasma wave amplitude and its time dependence.

Report

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

    (22 results)

All Other

All Publications (22 results)

  • [Publications] 中嶋 和久: "a proof-of principle experiment of Laser wakefield acceleration" Physica Scripta. T52. 61-64 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] 松尾 和也: "Stobiligation of double lenie CO_2 laser oscillation for leatwaue acceleratien" Reriew of Laser Engineering. 21. 514-519 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] A.Richard: "Implosion of D_2 temperature centuolled cryogenic foam targets with plastic ablato" Physical Reviews. E49. 1520-1526 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] 北川 米喜: "電子ビーム制御CO_2レーザー" レーザー研究. 21. 496-503 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] 北川 米喜: "レーザーによる粒子加速" レーザー研究. 21. 194-197 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] 北川 米喜: "パルス動作CO_2レーザー" レーザー研究. 21. 44-47 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] 北川 米喜: "レーザー技術の新展開3章4節" 霜田光一監修,レーザー学会編学会センター関西刊, 369 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] K.Nakajima: "A proof-of-principle experiment of laser wakefield acceleration" Physica Scripta. T52. 61-64 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] K.Matsuo: "Stabilization of double line CO2 laser oscillation for beatwave acceleration" Rev. Laser Engineering. 21. 514-519 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] A.Richard: "Implosion of D2 temperature controlled cryogenic foam targets with plastic ablator" Phys. Reviews. E49. 1520-1526 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Y.Kitagawa: "Electron beam controlled CO2 lasers" Rev. Laser Engineering. 21. 496-503 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Y.Kitagawa: "Particle acceleration by lasers" Rev. Laser Engineering. 21. 194-197 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Y.Kitagawa: "Pulse-operated CO2 lasers" Rev. Laser Engineering. 21. 44-47 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Y.Kitagawa: Laser Society of Japan, New developments of laser technology, Chapter 3, Section 4, ed. by K.Shimoda, 369 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] 中嶋和久: "A Proof-of-principle experiment of laser wakefield acceleration" Physica Scripta. T52. 61-64 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] 松尾和也: "Stabilijation of double line CO_2 laser osillation for beatwave acceleration" Review of Laser Engineering. 21. 514-519 (1993)

    • Related Report
      1994 Annual Research Report
  • [Publications] A.Richard: "Implasion of D_2 temperature controlled cryogenic form targets with plastics" Plysical Reviews. E49. 1520-1526 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] 北川米喜: "電子ビーム制御CO_2レーザー" レーザー研究. 21. 496-503 (1993)

    • Related Report
      1994 Annual Research Report
  • [Publications] 北川米喜: "パルス動作CO_2レーザー" レーザー研究. 21. 44-47 (1993)

    • Related Report
      1994 Annual Research Report
  • [Publications] 北川米喜: "レーザーによる粒子加速" レーザー研究. 21. 194-197 (1993)

    • Related Report
      1994 Annual Research Report
  • [Publications] 北川米喜: "レーザー技術の新展開3章4節" 霜田光一監修,レーザー学会編,学会センター関西刊, 369 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] 松尾和也: "Stabilization of Double-Line CO_2 Laser Oscillation for Beat-wave" レーザー研究. 21. 514-519 (1993)

    • Related Report
      1993 Annual Research Report

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

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