Promotion of Lepton Flavor Physics by developing an intense pulsed muon beam

2012 Fiscal Year Final Research Report

• Project/Area Number: 22340065
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: High Energy Accelerator Research Organization
• Principal Investigator: MIHARA Satoshi 大学共同利用機関法人高エネルギー加速器研究機構, 素粒子原子核研究所, 准教授 (80292837)
• Co-Investigator(Kenkyū-buntansha): NISHIGUCHI Hajime 大学共同利用機関法人高エネルギー加速器研究機構, 素粒子原子核研究所, 助教 (10534810)
• Co-Investigator(Renkei-kenkyūsha): AOKI Masaharu 大阪大学, 理学研究科, 教授 (80290849) ; YOSHIMURA Koji 大学共同利用機関法人高エネルギー加速器研究機構, 素粒子原子核研究所, 准教授 (50272464)
• Project Period (FY): 2010 – 2012
• Keywords: 粒子測定技術

Research Abstract

We have promoted a development of high intensity pulsed muon beam with high purity at J-PARC, where user operation has been started in 2008. This has contributed to opening up a new research area in elementary particle physics. In this research there should be no beam particle leakage in between consecutive beam pulses. In order to address this issue we developed a new method to form a beam pulse and a method to diagnose the produced beam.

Research Products

• [Journal Article] New measurements of proton beam extinction at J-PARC (2011)
  • Author(s): K. Yoshimura, Y. Hori, Y. Sato, M.Shimamoto, Y. Takeda, M. Uota (KEK, Ibaraki), Y. Hashimoto (J-PARC, KEK & JAEA, Ibaraki-ken), Y. Igarashi, S. Mihara, H. Nishiguchi (KEK, Tsukuba), M. Aoki, S. Hikida, H. Nakai (Osaka University, Osaka)
  • Journal Title: Proceedings of IPAC2011 Pages: 1242
• [Journal Article] Measurement of proton beam extinctionat J-PARC (2010)
  • Author(s): K. Yoshimura, Y. Hashimoto, Y. Hori, Y. Sato, M. Shimamoto, Y. Takeda, M. Uota,Y. Igarashi, H. Nishiguchi, S. Mihara
  • Journal Title: Proceedings of IPAC2010 Pages: 984
• [Presentation] Lepton Flavor Violation Experiments at J-PARC (2013)
  • Author(s): 三原智
  • Organizer: KEK Flavor Factory Workshop
  • Year and Date: 20130300
• [Presentation] MEG and COMET (2012)
  • Author(s): 三原智
  • Organizer: 韓国物理学会
  • Year and Date: 20121000
• [Presentation] 大強度パルス陽子ビームを用いたμ-e 転換事象探索計画 (2012)
  • Author(s): 三原智
  • Organizer: 日本物理学会
  • Year and Date: 20120900
• [Presentation] New measurements of proton beam extinction at J-PARC (2011)
  • Author(s): K. Yoshimura, Y. Hori, Y. Sato, M.Shimamoto, Y. Takeda, M. Uota (KEK, Ibaraki), Y. Hashimoto (J-PARC, KEK & JAEA, Ibaraki-ken), Y. Igarashi, S. Mihara, H. Nishiguchi (KEK, Tsukuba), M. Aoki, S. Hikida, H. Nakai (Osaka University, Osaka)
  • Organizer: IPAC2011
  • Place of Presentation: San Sebastian Spain
  • Year and Date: 20110900
• [Presentation] 、 COMET 実験のための J-PARC 50 GeV PSにおるビームエクスティンクションの測定 (2011)
  • Author(s): 吉村浩司、橋本義徳、堀洋一郎、嶋本眞幸、 三原智、 佐藤吉博、武田泰弘、 魚田雅彦、 西口創、五十嵐洋一、仲井裕紀、 青木正治
  • Organizer: 日本物理学会
  • Year and Date: 20110300
• [Presentation] COMET 実験のためのパルス陽子ビームの研究 (2011)
  • Author(s): 仲井裕紀、西口創、三原智、吉村浩司、青木正治、久野良孝、佐藤朗、冨澤正人、他
  • Organizer: 日本物理学会
  • Year and Date: 20110300
• [Presentation] Muon Physics Program at J-PARC (2010)
  • Author(s): S. Mihara
  • Organizer: PSI2010
  • Place of Presentation: PSI Switzerland
  • Year and Date: 20101000
• [Presentation] Measurement of proton beam extinction at J-PARC (2010)
  • Author(s): K. Yoshimura, Y. Hashimoto, Y. Hori, Y. Sato, M. Shimamoto, Y. Takeda, M. Uota,Y. Igarashi, H. Nishiguchi, S. Mihara
  • Organizer: IPAC2010
  • Place of Presentation: KyotoJapan
  • Year and Date: 20100500
• [Remarks]
  • URL: http://comet.kek.jp