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Development of software trigger for higher intensity rare muon decay experiment

Research Project

Project/Area Number 17K14267
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Particle/Nuclear/Cosmic ray/Astro physics
Research InstitutionThe University of Tokyo

Principal Investigator

Uchiyama Yusuke  東京大学, 素粒子物理国際研究センター, 特任助教 (90580241)

Research Collaborator USAMI Masashi  
Project Period (FY) 2017-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2018: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2017: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Keywordsデータ収集システム / トリガー / ミュー粒子稀崩壊探索 / 大強度加速器実験 / 計算機クラスター / 素粒子実験 / ミュー粒子稀崩壊 / レプトンフレーバーの破れ
Outline of Final Research Achievements

We worked on an outstanding issue in the MEG II experiment from both hardware and software points of view. The MEG II experiment will search for the lepton-flavor-violating rare muon decay, mu to e gamma decay, using the world's most intense muon beam. In the experiment, the treatment of the huge amount of data is one of the challenging points. In this study, we built a system to reduce the data size from 240 MB/s to 30 MB/s without loosing the signal efficiency, leading to more robust achievement of the target sensitivity.

Academic Significance and Societal Importance of the Research Achievements

分岐比10の-13乗以下のレプトンフレーバーを破るミュー粒子稀崩壊探索は素粒子のフレーバー研究の最重要課題の一つである。実験開始に先立ってデータの取り扱いを確立したことで,目標とする実験感度の達成をより確実のものとした本研究は,国際共同実験MEG IIの成功,ひいては物理学の進展に大きく寄与したといえる。本研究によりMEG II実験に必要なストレージコストを1~2千万円程度削減できた。増大するデータ量の取り扱いは分野全体の課題であり,本研究で確立したシステムと,開発した高計数率下の事象再構成法はMEG IIのみならず他の中小規模強度フロンティア素粒子実験に生かすことができる。

Report

(3 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • Research Products

    (21 results)

All 2019 2018 2017 Other

All Int'l Joint Research (6 results) Journal Article (5 results) (of which Int'l Joint Research: 4 results,  Open Access: 3 results,  Peer Reviewed: 3 results) Presentation (9 results) (of which Int'l Joint Research: 6 results,  Invited: 2 results) Remarks (1 results)

  • [Int'l Joint Research] Paul Scherrer Institute(スイス)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] Budker Institute of Nuclear Physics/Joint Institute for Nuclear Research(ロシア連邦)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] INFN Pisa/INFN Rome(イタリア)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] Paul Scherrer Institute(スイス)

    • Related Report
      2017 Research-status Report
  • [Int'l Joint Research] Budker Institute of Nuclear Physics(ロシア連邦)

    • Related Report
      2017 Research-status Report
  • [Int'l Joint Research] INFN Pisa/INFN Roma(イタリア)

    • Related Report
      2017 Research-status Report
  • [Journal Article] Hunting the muon's forbidden decay2019

    • Author(s)
      Angela Papa、Francesco Renga、Yusuke Uchiyama
    • Journal Title

      CERN Courier

      Volume: May/June

    • Related Report
      2018 Annual Research Report
    • Open Access / Int'l Joint Research
  • [Journal Article] MEG II実験 ―分岐比10-14台でのμ+→e+γ崩壊探索―2018

    • Author(s)
      家城佳、内山雄祐
    • Journal Title

      高エネルギーニュース

      Volume: 37 Pages: 1-10

    • Related Report
      2018 Annual Research Report
    • Open Access
  • [Journal Article] Design and test of the calibration system of the MEGII Pixelated timing Counter2018

    • Author(s)
      M. Rossella, et al.
    • Journal Title

      Nuclear Instruments and Methods in Physics Research Section A

      Volume: - Pages: 300-302

    • DOI

      10.1016/j.nima.2018.10.129

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Development and commissioning of the 30 ps time resolution MEGII Pixelated Time detector2018

    • Author(s)
      P. W. Cattaneo, et al.
    • Journal Title

      Nuclear Instruments and Methods in Physics Research Section A

      Volume: - Pages: 660-662

    • DOI

      10.1016/j.nima.2018.09.055

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] The design of the MEG II experiment2018

    • Author(s)
      A.M.Baldini, …, S.Ogawa et.al.
    • Journal Title

      Eur. Phys. J. C

      Volume: 78 Issue: 5 Pages: 380-380

    • DOI

      10.1140/epjc/s10052-018-5845-6

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] MEG II offline computing2019

    • Author(s)
      Y. Uchiyama
    • Organizer
      Global Developments of Researches in Lepton Flavor Physics with Muons
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] MEG II offline computing2019

    • Author(s)
      Y. Uchiyama
    • Organizer
      PSI User's Meeting BV50
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] MEG II 実験における陽電子の時間再構成法の改善2019

    • Author(s)
      野内康介,他 MEG IIコラボレーション
    • Organizer
      日本物理学会第74回年次大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Full System of Positron Timing Counter Having Time Resolution under 40 psec with Fast Plastic Scintillator Readout by SiPMs2019

    • Author(s)
      M. Nishimura, P. W. Cattaneo, F. Berg, M. Biasotti, G.Boca, M. De Gerone, A. De Bari, M. Francesconi, L. Galli, F. Gatti, U. Hartmann, Z. Hodge, P.-R. Kettle, M. Nakao, D. Nicol, W. Ootani, A. Papa, S. Ritt, M. Rossella, E. Schmid, Y. Uchiyama, M. Usami, K. Yanai
    • Organizer
      The 15th Vienna Conference on Instrumentation
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Large Scale Characterization of SiPMs in the MEG II Experiment2018

    • Author(s)
      Y. Uchiyama
    • Organizer
      International Conference on the Advancement of Silicon Photomultipliers
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] MEG II 実験陽電子スペクトロメータにおける検出効率改善のための再構成アルゴリズムの研究2018

    • Author(s)
      宇佐見正志,他 MEG IIコラボレーション
    • Organizer
      日本物理学会2018年秋季大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] μ+ → e+γ 探索実験 MEG II 2018年度の展望2018

    • Author(s)
      内山雄祐,他 MEG IIコラボレーション
    • Organizer
      日本物理学会第73回年次大会
    • Related Report
      2017 Research-status Report
  • [Presentation] MEG II Offline and Analysis Resources2018

    • Author(s)
      Y. Uchiyama
    • Organizer
      PSI User's Meeting BV49
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Scintillation detectors in MEG2017

    • Author(s)
      Y. Uchiyama
    • Organizer
      The Fall 2017 CALICE collaboration meeting
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Remarks] MEG実験ホームページ

    • URL

      http://meg.icepp.s.u-tokyo.ac.jp/

    • Related Report
      2018 Annual Research Report 2017 Research-status Report

URL: 

Published: 2017-04-28   Modified: 2022-02-22  

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