Establishment of diagnostic method for high-intensity pulsed muon beam under a harsh environment

• Project/Area Number: 17H04841
• Research Category: Grant-in-Aid for Young Scientists (A)
• Allocation Type: Single-year Grants
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: High Energy Accelerator Research Organization
• Principal Investigator: Ueno Kazuki 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 (20587464)
• Project Period (FY): 2017-04-01 – 2020-03-31
• Project Status: Completed (Fiscal Year 2019)
• Budget Amount: ¥8,970,000 (Direct Cost: ¥6,900,000、Indirect Cost: ¥2,070,000); Fiscal Year 2019: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2018: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000); Fiscal Year 2017: ¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
• Keywords: 素粒子実験

Outline of Final Research Achievements

In the search of muon to electron conversion at J-PARC (COMET experiment), it is indispensable to realize and optimize high-intensity pulsed muon beam. The dedicated detector is essential for the optimization, which has been developed. However, we have surfaced some problems due to the most intense beam as never before. In this study, we tried to solve these problems. Then, radiation tolerance of the detector was almost acquired. Geometry construction of the detector to optimize the beam rate and establishment of the way of the particle identification were studied with simulation and those policies were almost fixed.

Academic Significance and Societal Importance of the Research Achievements

本研究の究極目的は未だ発見されていない荷電レプトンにおけるフレーバー混合過程の探索である。この過程は稀崩壊過程であるため大強度ビームが欠かせず、本研究によるビームの最適化のための問題解決は非常に重要であり、本研究の成果を基に本実験の探索が可能となる。また、本研究における放射線耐性の研究は、他の加速器実験にも役立つものであり、さらには宇宙や原子炉等高放射線環境への応用も考えられる。

Research Products

• [Int'l Joint Research] Monash University(オーストラリア)
• [Int'l Joint Research] Imperial College London(英国)
• [Int'l Joint Research] Institute for Basic Science(韓国)
• [Int'l Joint Research] Institute of High Energy Physics(中国)
• [Journal Article] Radiation hardness study for the COMET Phase-I electronics (2020)
  • Author(s): Y. Nakazawa, M. Moritsu et al.
  • Journal Title: Nuclear Instruments and Methods in Physics Research Section A Volume: 955 Pages: 163247-163247
  • DOI: 10.1016/j.nima.2019.163247
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Design and performance evaluation of front-end electronics for COMET straw tracker (2019)
  • Author(s): Ueno Kazuki、Hamada Eitaro、Hashimoto Shohei、Ikeno Masahiro、Mihara Satoshi、Nishiguchi Hajime、Uchida Tomohisa、Yamaguchi Hiroshi
  • Journal Title: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment Volume: 印刷中 Pages: 297-299
  • DOI: 10.1016/j.nima.2018.08.027
  • Peer Reviewed
• [Journal Article] Radiation study of FPGAs with neutron beam for COMET Phase-I (2019)
  • Author(s): Nakazawa Yu、Fujii Yuki、Hamada Eitaro、Lee MyeongJae、Miyazaki Yuta、Sato Akira、Ueno Kazuki、Yoshida Hisataka、Zhang Jie
  • Journal Title: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment Volume: 印刷中 Pages: 351-352
  • DOI: 10.1016/j.nima.2018.10.130
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Development of a thin-wall straw-tube tracker for COMET experiment (2018)
  • Author(s): K. Ueno, P. Evtoukhovitch, Y. Fujii, E. Hamada, S. Mihara, A. Moiseenko, H. Nishiguchi, K. Oishi, T. Saito, A. Samartsev, J. Tojo, Z. Tsamalaidze, N. Tsverava
  • Journal Title: Proceedings of Science Volume: 314 Pages: 524-524
  • DOI: 10.22323/1.314.0524
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Presentation] COMET実験における検出器開発 (2020)
  • Author(s): 上野一樹
  • Organizer: 第34回放射線検出器とその応用
• [Presentation] Development of the StrECal System for COMET Phase-I (2019)
  • Author(s): Kazuki Ueno
  • Organizer: The 3rd International Conference on Charged Lepton Flavor Violation
  • Int'l Joint Research
• [Presentation] Design of Radiation Tolerant Electronics for StrECal System in COMET Experiment (2019)
  • Author(s): Kazuki Ueno
  • Organizer: European Physical Society Conference 2019
  • Int'l Joint Research
• [Presentation] Status on the StrECal System (2019)
  • Author(s): Kazuki Ueno
  • Organizer: J-PARC Symposium 2019
  • Int'l Joint Research
• [Presentation] Design and performance evaluation of front-end electronics for COMET straw tracker (2018)
  • Author(s): Kazuki Ueno
  • Organizer: 14th Pisa Meeting on Advanced Detectors
  • Int'l Joint Research
• [Presentation] Development of a thin-wall straw-tube tracker for COMET experiment (2017)
  • Author(s): Kazuki Ueno
  • Organizer: The European Physical Society Conference on High Energy Physics (EPS-HEP2017)
  • Int'l Joint Research
• [Presentation] 高放射線環境対応技術の共有化の提案 (2017)
  • Author(s): 上野一樹
  • Organizer: 計測システム研究会