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2005 Fiscal Year Final Research Report Summary

Production of Low Energy Gamma-Ray by Inverse Compton Scattering using a Far Infrared Laser

Research Project

Project/Area Number 14205018
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Research Field Applied physics, general
Research InstitutionJapan Synchrotron Radiation Research Institute

Principal Investigator

OHKUMA Haruo  Japan Synchrotron Radiation Research Institute, Accelerator Division, Chief Scientist, 加速器部門・運転・軌道解析グループ・グループリーダー 主任研究員 (60194106)

Co-Investigator(Kenkyū-buntansha) SUZUKI Shinsuke  Japan Synchrotron Radiation Research Institute, Accelerator Division, Chief Scientist, 加速器部門・加速管チーム, チームリーダー 主幹研究員 (00416380)
TAMURA Kazuhiro  Japan Synchrotron Radiation Research Institute, Accelerator Division, Chief Scientist, 加速器部門・光診断チーム, 副主幹研究員 (10360835)
OKAJIMA Shigeki  Chubu Univerrsity, Faculty of Engineering, Professor, 工学部, 教授 (90113084)
FUJIWARA Mamoru  Osaka University, RCNP, Assistant Professor, 核物理研究センター, 助教授 (00030031)
UTSUNOMIYA Hiroaki  Konan University, Professor, 理工学部, 教授 (00241167)
Project Period (FY) 2002 – 2005
KeywordsInverse Compton Scattering / Laser Electron Photon / Gamma-Ray / Far Infrared Laser / Waveguide / High Energy Syncrotron Radiation
Research Abstract

1.Technology of low energy γ-ray production
FIR laser was transported to the laser incident chamber on the beamline front-end in the storage ring tunnel by hollow acrylic waveguides into which dry air of -40℃ dew-point temperature was flow. Its distance is about 20m long, and 80% transmission efficiency was achieved. Beam profile monitor using a pyro-electric sensor was developed and installed at 2m-upstream from the chamber. By using this monitor, laser optical axis was tuned for the interaction point to electron beam. By the calculation considering the diffraction effect by many aperture limits in the duct of front-end, a production rate of γ-ray was estimated to be Nγ=1.1×10^4 photons/sec per 2W FIR laser of 118.8μm.
2.Development of high-power optically-pumped FIR laser
234.5W-output power of the pumping CO_2 laser was achieved at 9P(38) lasing line, which was used for pumping CH_3OH for 118.8μm lasing. Maximum output power of FIR laser was about 1.6W, and ±1 % of power variation was … More achieved for a long-term stability of 24 hours. To produce 20MeV range γ-ray, a short wavelength FIR laser and optical material of silicon for 48μm- and 57μm-laser were developed.
3.Measurement of produced γ-ray
To take measures of pileup of detection system and to reduce a background, LYSO scintillator was installed in 10mm-thickness Pb-box. Absorbers and collimator system were installed in front of the detector. Energy calibration was done by using radioactivity source of ^<88>Y. It was confirmed that stored electrons were not lost during the inverse Compton scattering. From measurement result, we estimated γ-ray production rate at 6×10^3 photons/sec per a 2W FIR laser.
4.Future plan
To produce high intense γ-ray, an advanced plan is in progress at the new beamline which has a 16m-long interaction region. Laser beam will be transported to near the interaction region by waveguides to recover a reduction of effective cross-section due to a large divergence of laser. Manufacture and installation of the mirror chamber, and construction of the laser clean room and the waveguide system were completed. In this beamline γ-ray production rate will be expected more than 10^5 photons/sec. Less

  • Research Products

    (28 results)

All 2006 2005 2004 2003 2002 Other

All Journal Article (27 results) Book (1 results)

  • [Journal Article] レーザー逆コンプトン散乱光量子ビームによる光核科学2006

    • Author(s)
      藤原 守
    • Journal Title

      レーザー研究 34巻・2号

      Pages: 154-161

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] 高性能cw遠赤外レーザーの開発とその先進実験物理学への応用2006

    • Author(s)
      岡島茂樹, 他
    • Journal Title

      日本実験力学会2006年度年次講演会論文集

      Pages: 193-196

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] 核融合プラズマ診断用の2波長遠赤外レーザー干渉計の開発2006

    • Author(s)
      中山和也, 他
    • Journal Title

      日本赤外線学会誌 (投稿中)

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] X-ray imaging of a small electron beam in a low-emittance synchrotron light source2006

    • Author(s)
      Shiro Takano, Mitsuhiro Masaki, Haruo Ohkuma
    • Journal Title

      Nuclear Instrument Method A556

      Pages: 357-370

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Nuclear Photon Science with Laser Inverse Compton Photon Beams2006

    • Author(s)
      M.Fujiwara
    • Journal Title

      The Review of Laser Engineering (in Japanese) Vol.34, No.2

      Pages: 154-161

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Development of high-performance cw far-infrared lasers and the application for advanced experimental physics2006

    • Author(s)
      S.Okajima, K.Nakayama, M.Tomimoto, H.Yamagishi, D.Kondo, K.Muraoka, K.Kawahata, K.Tanaka, T.Tokuzawa, T.Akiyama, Y.Ito, H.Ohkuma
    • Journal Title

      The Papers of 2006 JSEM Annual Conference on Experimental Mechanics (in Japanese)

      Pages: 193-196

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Development of a two-color far-infrared laser interferometer for plasma diagnostics2006

    • Author(s)
      K.Nakayama, S.Okajima, K.Kawahata, K.Tanaka, T.Tokuzawa, T.Akiyama, Y.Ito, H.Ohkuma
    • Journal Title

      Journal of the Society of Infrared Science and Technology (in Japanese) (to be published)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Temperature dependence of optical constants of silicon for short wavelength FIR laesr lines2005

    • Author(s)
      K.Nakayama et al.
    • Journal Title

      Conference Digest of Joint 30th International Conference on IRMMW and 13th International Conference on THz

      Pages: 596-597

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] X-ray imaging of a small electron beam in a low-emittance synchrotron light source2005

    • Author(s)
      S.Takano et al.
    • Journal Title

      Nuclear Instrument Method Vol.A556

      Pages: 357-370

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Temperature dependence of optical constants of silicon for short wavelength FIR laser lines2005

    • Author(s)
      K.Nakayama, S.Okajima, H.Ohkuma, K.Kawahata, K.Tanaka, T.Tokuzawa, T.Akiyama, Y.Ito
    • Journal Title

      Conference Digest of Joint 30th International Conference on Infrared and Millimeter Waves and 13th International Conference on Terahertz electronics (Williamsburg, Verginia, USA, September19-23, 2005)

      Pages: 596-597

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Photonuclear reaction studies at synchrotron radiation facilities in Japan2004

    • Author(s)
      H.Utsunomiya, et al.
    • Journal Title

      Nuclear, Physics Vol.A738

      Pages: 136-142

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Precise Measurement of Optical Constants of Si for Short-Wavelength Far-Infrared Region2004

    • Author(s)
      K.Nakayama, et al.
    • Journal Title

      Conference Digest of Joint 29th International Conference on IRMMW and 12th International Conference on THz

      Pages: 209-210

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Production of 10 MeV γ-ray by the Backward Compton Scattering Using and Optically-Pumped FIR Laser at SPring-82004

    • Author(s)
      H.Ohkuma et al.
    • Journal Title

      Conference Digest of Joint 29th International Conference on IRMMW and 12th International Conference on THz

      Pages: 789-790

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Photonuclear reaction studies at synchrotron radiation facilities in Japan2004

    • Author(s)
      H.Utsunomiya, K.Y.Kara, S.Goko, H.Akimune, T.Yamagata, M.Ohta, H.Ohgaki, H.Toyokawa, T.Hayakawa, T.Shizuma, P.Mohr, Y.-W.Lui, H.Ohkuma, H.Yonehara, K.Soutome, M.Arnould
    • Journal Title

      Nucl.Phys.A 738

      Pages: 136-142

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Precise Measurement of Optical Constants of Si for Short-Wavelength Far-Infrared Region2004

    • Author(s)
      K.Nakayama, S.Okajima, H.Ohkuma, K.Kawahata, K.Tanaka, T.Tokuzawa, Y.Ito
    • Journal Title

      Conference Digest of Joint 29th International Conference on Infrared and Millimeter Waves and 12th International Conference on Terahertz electronics (Karlsruhe, Germany, September 27-October 1, 2004)

      Pages: 209-210

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Production of 10 MeV γ-ray by the Backward Compton Scattering Using an Optically-Pumped FIR Laser at SPring-82004

    • Author(s)
      H.Ohkuma, Y.Arimoto, K.Kawase, K.Tamura, S.Suzuki, T.Yorita, M.Shoji, K.Nakanishi, H.Akimune, M.Fujiwara, S.Okajima
    • Journal Title

      Conference Digest of Joint 29th International Conference on Infrared and Millimeter Waves and 12th International Conference on Terahertz electronics (Karlsruhe, Germany, September 27-October 1, 2004)

      Pages: 789-790

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Beam-Performance Improvement of the SPring-8 Storage Ring2003

    • Author(s)
      H.Ohkuma, et al.
    • Journal Title

      Proceedings of the 2003 Particle Accelerator Conference

      Pages: 881-883

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Development of High Power Optically-Pumped cw FIR Lasers2003

    • Author(s)
      S.Okajima, et al.
    • Journal Title

      Conference Digest of the 28th International Conference on Infrared and Millimeter Waves.

      Pages: TU15-1

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Beam-Performance Improvement of the SPring-8 Storage Ring2003

    • Author(s)
      H.Ohkuma, S.Date, M.Masaki, T.Nakamura, T.Ohshima, K.Soutome, S.Takano, K.Tamura, M.Takao, H.Tanaka, N.Kumagai;
    • Journal Title

      Proceedings of the 2003 Particle Accelerator Conference (Oregon, USA, May 12-16, 2003)

      Pages: 881-883

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Development of High Power Optically-Pumped cw FIR Lasers2003

    • Author(s)
      S.Okajima, K.Nakayama, K.Kawahata, K.Tanaka, T.Tokuzawa, Y.Ito, H.Ohkuma, Y.Arimoto, S.Suzuki, K.Tamura
    • Journal Title

      Conference Digest of the 28th International Conference on Infrared and Millimeter Waves (September 29-October 2, 2003,Ohtsu, Shiga, Japan)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] レーザー逆コンプトン散乱を目的とした高出力光励起遠赤外レーザーの開発2002

    • Author(s)
      有本 靖, 他
    • Journal Title

      光・量子デバイス研究会資料 OQD-02-24

      Pages: 63-67

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Beam commissioning and achieved performance of SPring-8 storage ring phase-2 lattice with four magnet-free long straight sections2002

    • Author(s)
      H.Tanaka, et al.
    • Journal Title

      Nuclear Instrument Method Vol.A486

      Pages: 521-538

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] 加速器診断装置の現状2002

    • Author(s)
      高野史郎, 大熊春夫
    • Journal Title

      SPring-8利用者情報 7巻・3号

      Pages: 131-136

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Development of a high intensity optically-pumped far infrared laser for production of γ-ray by inverse Compton scattering2002

    • Author(s)
      Y.Arimoto, H.Ohkuma, Y.Sato, S.Suzuki, K.Tamura, S.Okajima
    • Journal Title

      The Papers of Technical Meeting on Optical and Quantum Devices, IEE Japan(in Japanese) OQD-02-24

      Pages: 63-67

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Beam commissioning and achieved performance of SPring-8 storage ring phase-2 lattice with four magnet-free long straight sections2002

    • Author(s)
      H.Tanaka, K.Soutome, M.Takao, M.Masaki, H.Ohkuma, N.Kumagai, J.Schimizu
    • Journal Title

      NIM A486

      Pages: 521-538

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Present Status of Accelerator Diagnostics Beamlines2002

    • Author(s)
      S.Takano, H.Ohkuma
    • Journal Title

      SPring-8 Information(in Japanese) vol.7, No.3

      Pages: 131-136

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Nuclear astrophysics experiments with a laser-electron photon beam

    • Author(s)
      H.Utsunomiya, S.Goko, H.Akimune, K.Yamasaki, T.Yamagata, M.Ohta, H.Ohgaki, H.Toyokawa, Y.-W.Lui, T.Hayakawa, T.Shizuma, H.Ohkuma, S.Okajima, K.Sumiyoshi, T.Kajino
    • Journal Title

      Perspectives in Heavy Ion Physics(edited by K.Yoshida, S.Kubono, I.Tanihata, and C.Signorini)(World Scientific, Singapore, 2002)

      Pages: 286-297

    • Description
      「研究成果報告書概要(欧文)」より
  • [Book] Perspectives in Heavy Ion Physics"Nuclear astrophysics experiments with a laser-electron photon beam"2002

    • Author(s)
      H.Utsunomiya, et al.
    • Total Pages
      286-297
    • Publisher
      World Scientific, Singapore
    • Description
      「研究成果報告書概要(和文)」より

URL: 

Published: 2007-12-13  

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