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2005 Fiscal Year Final Research Report Summary

Short Electromagnetic Wave Generation by Interaction between Short Pulse Laser and Mangetized Plasma

Research Project

Project/Area Number 16340178
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Plasma science
Research InstitutionUtsunomiya University

Principal Investigator

YUGAMI Noboru  Utsunomiya Univ., Engineering, Acc.Prof, 工学研究科, 助教授 (60220521)

Co-Investigator(Kenkyū-buntansha) HIGASHIGUCHI Takeshi  Miyazaki Univ, Engineering, Research Assistant, 工学部, 助手 (80336289)
Project Period (FY) 2004 – 2005
KeywordsTeraherts / Electromagnetic Wave / Laser / Plasma / プラズマ
Research Abstract

We conducted the short electromagnetic wave generation experiments by use of ultra-high power, short pulse laser system, whose maximum power is 1TW with pulse duration of 100 fs at the wavelength of 800 nm. The laser focused in the N2 gas with the pressure of 80 Pa. The laser can created plasma immediately and the strong radiation is observed from this region. To detect the electromagnetic wave, we used several detector which has specific frequency. These detectors can response the range from 30 to 300 GHz with the time resolution less than 100 ps. The frequency was determined by the Time of Flight technique which uses the frequency dispersion in the waveguide. The detected radiation pulse has the time duration of 200 ps for all of the range of the frequecies. The radiation emitted the conical direction with 30 degree from the laser created plasma with the radial polarization which can be measured by the rotating the waveguide and horn antenna. The cone angle decreases as the radiation frequency increases.
To explain these experimental data, we created the plasma model : The plasma column created by the intense laser pulse with the diameter of the focal size and the length of the Rayleigh length. The electrons expel by the ponderomotive force of the laser pulse. On the other hand, the ions remain the original position in the time scale which we are interested. Thus the electrons radially are oscillated by the electric force which created by the ion electric field. The radiation has TM01 mode in the waveguide and is emitted into free space. The calculation indicates the direction of the radiation with the angle of 30 degree and the radial polarization, which is good agreements with the experiments. Furthermore, it indicates the direction angle is the function of the radiation frequency.
These experimental data suggest the plasma parameters for generation of higher radiation frequency, ie, the terahertz radiation.

  • Research Products

    (9 results)

All 2005

All Journal Article (9 results)

  • [Journal Article] Generation of Short Pulse Microwave via Superluminous DARC2005

    • Author(s)
      Noboru Yugami et al.
    • Journal Title

      Japanese Journal of Applied Physics 44(22)

      Pages: L1304-L1306

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Radiation from Tightly Focused Highly Intense Laser Pulse Interaction with Weekly Magnetized Plasma2005

    • Author(s)
      Homeira Parchamy et al.
    • Journal Title

      Japanese Journal of Applied Physics 44(5)

      Pages: L196-L198

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Enhancement of EUV emission from a liquid microjet target by use of dual laser pulses2005

    • Author(s)
      T.Higashiguchi et al.
    • Journal Title

      Prcc. Of SPIE 5777

      Pages: 613-616

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Efficeient soft x-ray emission source at 13.5 nm by use of a femtosecond-laser-produced Li-based microplama2005

    • Author(s)
      T.Higashiguchi et al.
    • Journal Title

      Applied Physics Letters 86

      Pages: 2315021-231502-3

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Dynamic of ion density perturbation observed in a microwave plasma interaction2005

    • Author(s)
      Md.Kamal-Al-Hassan et al.
    • Journal Title

      Phys. Plasmaas 12

      Pages: 112307-1-112307-4

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Generation of Short Pulse Microwave via Superluminous DARC2005

    • Author(s)
      Noboru Yugami et al.
    • Journal Title

      Japanese Journal of Applied Physics 44

      Pages: L1304-L1306

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Radiation from Tightly Focused Highly Intense Laser Pulse Interaction with Weekly Magnetized Plasma2005

    • Author(s)
      Homeira Parchamy et al.
    • Journal Title

      Japanese Journal of Applied Physics 44

      Pages: L196-L198

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Enhancement of EUV emission from a liquid microjet target by use of dual laser pulses2005

    • Author(s)
      T.Higashiguchi et al.
    • Journal Title

      Prcc.Of SPIE 5777

      Pages: 613-616

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Dynamic of ion density perturbation observed in a microwave plasma interaction2005

    • Author(s)
      Md.Kamal-Al-Hassan et al.
    • Journal Title

      Phys.Plasmaas 12

      Pages: 112307-1-112307-4

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2007-12-13  

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