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1997 Fiscal Year Final Research Report Summary

Photon Acceleration and Its Mechanisms Induced in Plasma by Intense Microwave

Research Project

Project/Area Number 08458106
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field プラズマ理工学
Research InstitutionUtsunomiya University

Principal Investigator

NISHIDA Yasushi  Utsunomiya University, Graduate School of Engineering, Professor, 大学院・工学研究科, 教授 (00005315)

Co-Investigator(Kenkyū-buntansha) YUGAMI Noboru  Utsunomiya University, Graduate School of Engineering, Associate Professor, 大学院・工学研究科, 助教授 (60220521)
Project Period (FY) 1996 – 1997
Keywordsphoton acceleration / laser wakefield / blue shift / frequency up-shift / ponderomotive force / plasma accelerator / intense microwave / microwave plasma interaction
Research Abstract

The task of this project is to clarify the mechanism of the blue-shift or photon acceleration induced in the frequency of electromagnetic wave irradiated to the plasma. This phenomenon was observed originally in our Laboratory in the investigations related to the laser wakefield acceleration which is simulated by the intense microwavw irradiation to the plasma instead of high power, short pulse laser.
In the present works, we have observed specifically two kinds of phenomena, the one is followed by ionization induced by a strong microwave and the other is the phenomena observed in the situation where there is no or almost no ionization. In the second case, the strong standing wave existing within the chamber push to move the plasma by a ponderomotive force to create a blue-shift. The Key differences between two cases are that the upper side-band daughter waves with frequencies such as 6-20 MHz have seen clearly observed when there is no ionization. If the ionization are accompanied, these daughter frequency components are not clear, rather broad band spectrums are observed. As an application of the ptesent phenomena, we have shown the possibilities of DC-AC Radiation Conversion (DARC) phenomenon. This is a direct radiation process of ultra-short pulse microwaves from electrostatic fields.

  • Research Products

    (15 results)

All Other

All Publications (15 results)

  • [Publications] H.Ito et al.: "Formation of Duct and Self-Focusing in Plasma by High Power Microwave"" Phys.Rev.Lett.76. 4540-4543 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] X.Xu, et al.: "Frequency Up-Shift in tha Interaction of High Power Microwave with Underdense Inhomogeneous Plasma" J.Plasma and Fusion Research. 72. 91-102 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] X.Xu, et al.: "Frequency upshift in tha interaction of high power microwave with an inhomogeneous plasma" Phys.Rev.E.55. 3328-3332 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] B.Cros, et al.: "Ionization-indiced frequency up-shift of a high power microwave interacting with a plasma" Phys.Plasma. 4. 837-2844 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] N.Yugami et al.: "Experimental Observation of Short MicrowaveGeneration via Relativistic Ionization front Produced by CO2 Laser" Jpn.J.Appl.Phys.37. 688-689 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] H.Ito et al.: "Formation of Plasma Waveguide and Ducting of High Power Microwave in Plasma" J.Plasma and Fusion Research(in print). (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] H.Ito, Y.Nishida and N.Yugami: "Formation of Duct and Self-Focusing in plasma by Hihg power Microwave" phys.Rev.Lett.76. 4540-4543 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] X.Xu, Y.Nishida and N.Yugami: "Frequency Up-Shift in the Interaction of High Power Microwave with Underdense Inhomogeneous Plasma" J.Plasma and Fusion Research. 72. 91-102 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] X.Xu, N.Yugami, and Y.Nishida: "Frequency upshift in the interaction of a high power microwave with an inhomogeneous plasma" Phys.Rev.E.55. 3328-3332 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] B.Cros, X.Xu, T.Tsukada, N.Yugami, Y.Nishida and G.Matthieussent: "Ionization-induced frequency up-shift of a high power microwave interacting with a plasma" Phys.Plasma. 4. 2837-2844 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] N.Yugami, K.Fujita, T.Higashiguchi, and Y.Nishida: "Experimental Observation of Short Microwave Generation via Relativistic Ionization front Produced by CO2 Laser" Jpn.J.Appl.Phys.37. 688-689 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] H.Ito, Y.Nishida, and N.Yugami: "Foprmation of plasma Waveguide and Ducting of High Power Microwave in Plasma" J.Plasma and Fusion Reserch. (in print).

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] H.Ito, Y.Nishida, and N.Yugami: "PNAM : Anomalous Penetration of High Power Microwave into Overdense Plasma" Proc.1996 Int.Conf.Plasma Phys.Ed.by H.Sugai and Y.Hayashi. Vol.1. 406-409 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] B.Cros, G.Matthieussent, X.Xu, T.Tsukada, Y.Nishida: "High power EM Pulse propagation in a plasma with addidional ionization" Proc.1996 Int.Conf.Plasma Phys.Ed.by H.Sugai and Y.Hayashi. Vol.1. 934-937 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] X.Xu, T.Tsukada, N.Yugami, and Y.Nishida: "Photon acceleration in the interacton of high power microwave with inHomogeneous plasma" Proc.1996 Int.Conf.Plasma Phys.Ed.by H.Sugai and Y.Hayashi. Vol.1. 1758-1761 (1996)

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

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Published: 1999-03-16  

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