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STUDY OF COHERENT SYNCHROTRON RADIATION AND CHERENKOV RADIATION

Research Project

Project/Area Number 03402010
Research Category

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

Allocation TypeSingle-year Grants
Research Field 物理学一般
Research InstitutionTOHOKU UNIVERSITY

Principal Investigator

IKEZAWA Mikihiko  Res.Inst.Sci.Meas.Tohoku Univ. Professor, 科学計測研究所, 教授 (10004334)

Co-Investigator(Kenkyū-buntansha) ISHI Kimihiro  Res.Inst.Sci.Meas.Tohoku Univ. Res.Assistant, 科学計測研究所, 助手 (00125494)
SHIBATA Yukio  Res.Inst.Sci.Meas.Tohoku Univ. Res.Assistant, 科学計測研究所, 助手 (70006154)
OHSAKA Toshiaki  Res.Inst.Sci.Meas.Tohoku Univ. Assoc.Prof., 科学計測研究所, 助教授 (20152100)
Project Period (FY) 1991 – 1992
Project Status Completed (Fiscal Year 1992)
Budget Amount *help
¥17,200,000 (Direct Cost: ¥17,200,000)
Fiscal Year 1992: ¥1,800,000 (Direct Cost: ¥1,800,000)
Fiscal Year 1991: ¥15,400,000 (Direct Cost: ¥15,400,000)
KeywordsSynchrotron radiation / SR / coherent synchrotron radiation / Cherenkov radiation / transition radiation / far-infrared / millimeter wave / linear accelerator / コヒ-レント放射光 / 遠光外線
Research Abstract

The electrons from a linear accelerator is confined in a short bunch whose longitudinal length is a few millimeters. In our study we have used linear accelerators at laboratory for Nuclear Science, Tohoku University and at Research Reactor Laboratory, Kyoto University to observe coherent synchrotron radiation. The observed spectrum in either case had a peak at a wavelength around 1 to 4 mm and the intensity was enhanced by a factor of several orders of magnitude compared with that of ordinary radiation. The dependence of the intensity on the beam current and the polarization of the radiation were in agreement with theory. During the study, we observed for the first time coherent transition radiation which was emitted when the electrons passed through a thin metallic foil. Its spectrum and the enhancement of the intensity due to the coherent effect ware similar to those of the coherent synchrotron radiation. The dependence of the intensity on the emission length and the angular distribu … More tion of the intensity were in accordance with theory. Further, we have observed coherent transition radiation using a linear accelerator at Osaka University. We have determined the diameter and the emittance of the beam, and the longitudinal distribution of the electrons in a bunch. Coherent transition radiation has been proved to be a useful means of the beam diagnosis. Thus, the properties of transition radiation in the long wavelength region have been studied by the coherent radiation. Coherent transition radiation and synchrotron radiation have been confirmed to be useful sources with continuous spectra.
We have pointed out that it is important to distinguish the contribution from the transition radiation from that of the Cherenkov process in the case of the Cherenkov radiation from a bounded trajectory of the electron. Further, we have confirmed experimentally that the emission length must be longer than the formation zone in order that effective radiation of the Cherenkov process occurs. Less

Report

(3 results)
  • 1992 Annual Research Report   Final Research Report Summary
  • 1991 Annual Research Report

Research Products

(38 results)

All Other

All Publications (38 results)

  • [Publications] 高橋 俊晴: "サブミリからミリ波領域におけるコヒーレント・チェレンコフ放射の観測" 東北大学理学部核理研研究報告. 24. 182-190 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Y.Shibata: "Observation of Coherent Synchrotron,Cherenkov and Wake Field Radiation at Millimeter Wavelengths Using an L-Band Linear Accelerator" Phys.Rev.A. 44. 3449-3451 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] 高橋 俊晴: "コヒーレントな横断放射の観測" 東北大学理学部核理研研究報告. 24. 331-337 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] M.Ikezawa: "Generation of Coherent Synchrotron Radiation by Linac" Sixteenth International Conference on Infrared and Millimeter Waves,SPIE. 1576. 65-68 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] 高橋 俊晴: "ミリ波コヒーレント放射光のスペクトル" 第26回京都大学原子炉実験所学術講演会報文集. 201-208 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] 柴田 行男: "コヒーレントなミリ波遷移放射の観測" 第26回京都大学原子炉実験所学術講演会報文集. 209-216 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Y.Shibata: "Observation of Coherent Transition Radiation at Millimeter and Submillimeter Wavelengths" Phys.Rev.A. 45. 8340-8343 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] 高橋 俊晴: "コヒーレント遷移放射の基礎的性質" 東北大学理学部核理研研究報告. 25. 120-130 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] 池沢 幹彦: "ライナック電子線によるコヒーレントなミリ波遷移放射" 京都大学原子炉実験所テクニカルレポート. 346. 45-62 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] M.Ikezawa: "Coherent Transition Radiation" Seventeenth International Conference on Infrared and Millimeter Waves,SPIE. 1929. 5-6 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] 高橋 俊晴: "コヒーレント遷移放射における発光長と強度の関係" 東北大学理学部核理研研究報告. 25. 265-270 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] T.Takahashi: "Coherent Transition Radiation at Submillimeter and Millimeter Wavelengths" Phys.Rev.A. (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Y.Shibata: "Measurement of Three Dimensional Distribution of Electrons in a Picosecond Bunch by Coherent Transition Radiation" (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] T.Takahashi et al: "Observation of Cherenkov radiation at Sub-millimeter and Millimeter Wavelengths" Res.Rep.Lab.Nucl.Sci.,Tohoku Univ.24. 182-190 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Y.Sibata et al: "Observation of Coherent Synchrotron, Cherenkov and Wake Field Radiation at Millimeter Wavelengths Using an L-Band Linear Accelerator" Phys.Rev.A44. R3449-R3451 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] T.Takahashi et al: "Observation of Coherent Transition Radiation" Res.Rep.Lab.Nucl.Sci.,Tohoku Univ.24. 331-337 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] M.Ikezawa: "Generation of Coherent Synchrotron Radiation by Linacs" 16th Int.Conf.IR & MM.SPIE. Vol.1576. 65-68 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] T.Takahashi et al: "Spectrum of Coherent synchrotron radiation" 26th Coloq.Res. Reactor Lab.,Kyoto Univ.201-208 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Y.Shibata et al: "Observation of Coherent Transition Radiation" 26th Coloq.Res.Reactor Lab.,Kyoto Univ.209-216 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Y.Shibata et al: "Observation of Coherent Transition Radiation at Millimeter and submillimeter Wavelengths" Phys.Rev.A45. R8340-R8343 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] T.Takahashi et al: "Properties of Coherent Transition Radiation" Res.Rep.Lab.Nucl.Sci.,Tohoku Univ.25. 120-130 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] M.Ikezawa: "Generation of Coherent Transition Radiation at Millimeter Waves by Linacs" Tech.Rep.Res.Reactor Lab.Kyoto Univ.346. 45-62 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] M.Ikezawa: "Coherent Transition Radiation" 17th Int.Conf IR & MM Waves.SPIE. Vol.1929. 5-6 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] T.Takahashi et al: "Relation between Emission Length and Intensity of Coherent Transition Radiation" Res.Rep.Lab.Nucl.Sci.,Tohoku Univ.25. 265-270 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] T.Takahashi: "Coherent Transition Radiation at Submillimeter and Millimeter Wavelengths"

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Y.Shibata et al: "Measurement of Three Dimensional Distribution of Electrons in a picosecond Bunch by Coherent Transition Radiation"

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Y.Shibata: "Observation of Coherent Transition Radiation at Millimeter and Sub millimeter Wavelengths" Phys.Rev.A. 45. 8340-8343 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] 高橋 俊晴: "コヒーレント遷移放射の基礎的性質" 東北大学理学部核理研研究報告. 25. 120-130 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] 池沢 幹彦: "ライナック電子線によるコヒーレントなミリ波遷移放射" 京都大学原子炉実験所テクニカルレポート. 346. 45-62 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] M.Ikezawa: "Coherent Transition Radiation" Sevebteenth International Conference on Infrared and Millimeter Waves,SPIE. 1929. 5-6 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] 高橋 俊晴: "コヒーレント遷移放射における発光長と強度の関係" 東北大学理学部核理研研究報告. 25. 265-270 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] T.Takahashi: "Coherent Transition Radiation at Submillimeter and Millimeter Wavelengths" Phys.Rev.A(to be published). (1993)

    • Related Report
      1992 Annual Research Report
  • [Publications] Y.Shibata: "Observation of Coherent Synchrotron,Cherencov and Wake一Field Radiation at Millimeter Wavelength using an LーBand Linear Accelerator" Physical Review A. 44. R3449-3451 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] Y.Shibata: "Observation of Coherent transition Radiation at Millimeter and Submillimeter Wavelenghts" Physical Review A. (1992)

    • Related Report
      1991 Annual Research Report
  • [Publications] M.Ikezawa: "Generation of Coherent Synchrotron Radiation by Linac" 16th Int.Conf.IR and MM Waves SPIE. 1576. 65-68 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] 高橋 俊晴: "サブミリからミリ波領域におけるコヒ-レントなチェレンコフ放射の観測" 核理研研究報告. 24. 182-190 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] 高橋 俊晴: "ミリ波コヒ-レント放射光のスペクトル" 時森大学原子炉実験所学術講演会論文集. (第26回). 201-208 (1992)

    • Related Report
      1991 Annual Research Report
  • [Publications] 柴田 行男: "コヒ-レントなミリ波遷移放射の観測" 京都大学原子炉実験所学術講演会論文集. (第26回). 209-216 (1992)

    • Related Report
      1991 Annual Research Report

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Published: 1991-03-31   Modified: 2016-04-21  

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