Study and Development of Extremely Short Pulse Coherent Terahertz Light Source Employing an Electron Isochronous Ring

2013 Fiscal Year Final Research Report

• Project/Area Number: 20226003
• Research Category: Grant-in-Aid for Scientific Research (S)
• Allocation Type: Single-year Grants
• Research Field: Applied physics, general
• Research Institution: Tohoku University
• Principal Investigator: HAMA Hiroyuki 東北大学, 電子光理学研究センター, 教授 (70198795)
• Co-Investigator(Kenkyū-buntansha): KASHIWAGI Shigeru 東北大学, 電子光理学研究センター, 准教授 (60329133) ; HINODE Fujio 東北大学, 電子光理学研究センター, 准教授 (60292207) ; TANAKA Hitoshi 理化学研究所, XFEL 開発研究部門, 部門長 (30393317) ; TAKAHASHI Toshiharu 京都大学, 原子炉実験所, 准教授 (00273532) ; SUZUKI Shinsuke 高輝度光科学研究センター, 加速器部門, 主幹研究員 (00416380) ; KAWAI Masayuki 東北大学, 電子光理学研究センター, 准教授 (60374899) ; MIYAHARA Fusashi 高エネルギー加速器研究機構, 加速器研究施設, 助教 (20532691)
• Co-Investigator(Renkei-kenkyūsha): NANBU Ken-ichi 東北大学, 電子光理学研究センター, 技術専門職員 (00422072) ; MUTO Toshiya 東北大学, 電子光理学研究センター, 助教 (10431496)
• Project Period (FY): 2008-05-12 – 2013-03-31
• Keywords: コヒーレント放射 / テラヘルツ光 / アイソクロナスリング / 熱陰極高周波電子銃 / 空間電荷効果 / 時間領域差分法

Research Abstract

Production method for short-pulse electron beam with its bunch length around 100 fs or less has been mostly established. The method employs the velocity bunching mechanism in a traveling-wave accelerating structure and an original electron gun. The gun is composed of two independent cavity cells so as to manipulate and optimize the longitudinal phase space electron distribution for the velocity bunching scheme. The accelerator system was completed, after which the electron beam was successfully accelerated up to 50 MeV, thereby it might be possible to produce coherent terahertz (THz) radiation using bending magnets and/or undulators. It can be concluded that a light source accelerator facility for THz science, in which radiation safety program was accurately approved by the national regulation, is established.

Research Products

• [Journal Article] Present Status of Thermionic RF-Gun for Terahertz Source Project at Tohoku University (2012)
  • Author(s): F.Hinode, H.Hama, N.Y.Huang, S.Kashiwagi, M.Kawai, X.Li, T.Muto, I.Nagasawa, K.Nanbu, Y.Shibasaki, K.Takahashi
  • Journal Title: Proc. International Free Electron Lasers Conference 2012 Volume: 1 Pages: 137-139
• [Journal Article] Investigation of CSR Effect for Femtosecond Electron Bunches, in an Isochronous Accumulator Ring (2012)
  • Author(s): N-Y.Huang, H.Hama, M.Kawai, S.Kashiwagi, F.Hinode, K.Nanbu, T.uto, Y.Shibasaki, I.Nagasawa, K.Takahashi
  • Journal Title: Proc. International Particle Accelerator Conference 2012 Volume: 1 Pages: 589-591
• [Journal Article] Test-Accelerator as Coherent Terahertz Source Program (t-ACTS) at Tohoku University (2011)
  • Author(s): H.Hama, M.Kawai, S.Kashiwagi, F.Hinode, F.Miyahara, K.Nanbu, T.Muto, Y.Tanaka, X.Li, N-Y.Huang
  • Journal Title: Energy Procedia Volume: 9 Pages: 391-397
  • Peer Reviewed
• [Journal Article] Expected Performance of a Planar Undulator Designed for the Terahertz Source Project at Tohoku University (2011)
  • Author(s): F. Hinode, M.Kawai, K.Nanbu, F.Miyahara
  • Journal Title: Nucl. Instr. And Meth. in Phys. Res Volume: A 637 Pages: S72-S75
  • Peer Reviewed
• [Journal Article] Intense Coherent THz Generation from Accelerator-based Sources (2011)
  • Author(s): H.Hama, M.Yasuda, M.Kawai, F.Hinode, K.Nanbu, F.Miyahara
  • Journal Title: Nucl. Instr. And Meth. in Phys. Res Volume: A637 Pages: S57-S61
  • Peer Reviewed
• [Journal Article] Injector System of Test Accelerator as Coherent Terahertz Source (2011)
  • Author(s): S.Kashiwagi, F.Hinode, M.Kawai, T.Muto, K.Nanbu, Y.Tanaka, X.Li, H.Hama, N-Y.Huang
  • Journal Title: Proc. International Particle Accelerator Conference 2011 Volume: 1 Pages: 2993-2995
• [Journal Article] Development of a Thermionic RF Gun for Coherent THz Source t Tohoku University (2010)
  • Author(s): F. Hinode, H.Hama, S.Kashiwagi, M.Kawai, K.Nanbu, F.Miyahara, T.Muto, H.Oohara, Y.Tanaka
  • Journal Title: Proc. International particle Accelerator Conference 2010 Volume: 1 Pages: 1731-1733
• [Journal Article] Cherenkov Ring to Observe Longitudinal Phase Space of a Low Energy Electron Beam Extracted from an RF Gun (2010)
  • Author(s): H.Hama, K.Nanbu, M.Kawai, S.Kashiwagi, F.Hinode, T.Muto, F.Miyahara, Y.Tanaka
  • Journal Title: Proc. 14^<th> Beam Instrumentation Workshop Volume: 1 Pages: 79-83
• [Journal Article] Consideration on Terahertz FEL Using Pre-bunched Electrons Shorter Than the Wavelength (2009)
  • Author(s): H.Hama and M.Yasuda
  • Journal Title: Proc. International Free Electron Lasers 2009 Volume: 1 Pages: 394-397
• [Journal Article] A Far-infrared Undulator for Coherent Synchrotron Radiation and Free Electron Laser at Tohoku University (2009)
  • Author(s): H.Hama, F.Hinode, M.Kawai, K.Nanbu, F.Miyahara, M.Yasuda
  • Journal Title: AIP Conference Proceedings Volume: Vol.1234 Pages: 523-526
  • Peer Reviewed
• [Journal Article] Development of THz Light Source Using Pre-bunched FEL (2008)
  • Author(s): M.Yasuda, H.Hama, F.Hinode, K.Kasamsook, M.Kawai, A.Kurihara, K.Nanbu, Y.Shibasaki, S.Takahashi
  • Journal Title: Proc. International Free Electron Lasers 2008 Volume: 1 Pages: 71-74
• [Journal Article] Space Charge Effect for Short Electron Bunches in an Alpha Magnet (2008)
  • Author(s): H.Hama, F.Hinode, K Kasamsook, M.Kawai, K.Nanbu, M.Yasuda
  • Journal Title: Proc. International Free Electron Lasers 2008 Volume: 1 Pages: 305-308
• [Presentation] Development of THz Sources Based on Femtosecond Electron Pulse Train (2012)
  • Author(s): Hiroyuki Hama
  • Organizer: Workshop on Terahertz Sources for Time Resolved Studies of Matter
  • Place of Presentation: Argonne, IL, USA
  • Year and Date: 2012-08-30
  • Invited
• [Presentation] Coherent Synchrotron Radiation Source Based on an Isochronous Accumulator Ring with Femtosecond Electron Pulses (2011)
  • Author(s): N-Y.Huang, H.Hama, M.Kawai, S.Kashiwagi, F.Hinode, K.Nanbu, T.Muto, F.Miyahara, Y.Tanaka, X.Li
  • Organizer: International Particle Accelerator Conference 2011
  • Place of Presentation: San Sebastian, Spain
  • Year and Date: 2011-09-07
• [Presentation] THz Coherent Synchrotron Radiation Project Employing Isochronous Ring with Femtosecond Electron Pulse at Tohoku University (2010)
  • Author(s): Hiroyuki Hama
  • Organizer: China-Korea-Japan Joint Workshop on Electron/Photon Sources and Applications
  • Place of Presentation: Shanghai, China
  • Year and Date: 2010-12-02
• [Presentation] Cherenkov Ring to Observe Longitudinal Phase Space of a Low Energy Electron Beam Extracted from an RF Gun " (2010)
  • Author(s): Hiroyuki Hama
  • Organizer: 14^<th> Beam Instrumentation Workshop
  • Place of Presentation: Santa Fe, NM, USA
  • Year and Date: 2010-05-05
  • Invited
• [Presentation] 超短バンチ生成のための独立2空洞型高周波電子銃の高周波特性 (2009)
  • Author(s): 南部健一、宮原房史、河合正之、日出富士雄、濱広幸
  • Organizer: 第6回日本加速器学会年会
  • Place of Presentation: 東海村
  • Year and Date: 2009-08-06
• [Presentation] フェムト秒コヒーレントTHz 光源の開発 (2008)
  • Author(s): 日出富士雄、河合正之、K.Kasamsook、栗原亮、柴崎義信、高橋重伸、南部健一、濱広幸、安田真冬
  • Organizer: 第5回日本加速器学会年会
  • Place of Presentation: 東広島市
  • Year and Date: 2008-08-07
• [Remarks]
  • URL: http://tansei.lns.tohoku.ac.jp/abpg/