Realization of High-Intensity Pulsed-Muon-Beam Diagnosis under Harsh Environments

2022 Fiscal Year Final Research Report

• Project/Area Number: 20H01936
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 15020:Experimental studies related to particle-, nuclear-, cosmic ray and astro-physics
• Research Institution: Osaka University
• Principal Investigator: Ueno Kazuki 大阪大学, 大学院理学研究科, 准教授 (20587464)
• Project Period (FY): 2020-04-01 – 2023-03-31
• Keywords: 素粒子実験 / ミューオン / 耐放射線

Outline of Final Research Achievements

COMET experiment aiming to search for muon to electron conversion will be performed at J-PARC. This experiment needs to realize and optimize high intensity pulsed muon beam.
The dedicated detector for the beam measurement is indispensable. However, we have faced some issues due to the most intense beam as never before. In this study, we struggled with these issues. The radiation tolerance of detector electronics was achieved and the final version was constructed. Beam blocker design to optimize the beam rate and establishment of the way of the particle identification were proceeded with simulation and those strategies for future were almost fixed.

Free Research Field

素粒子実験

Academic Significance and Societal Importance of the Research Achievements

本研究の究極的な目標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非常に重要なポイントとなっており、本研究におけるビームの最適化は必要不可欠なものである。また、本研究による耐放射線性の研究は、他の加速器実験においても有用なものであり、さらには宇宙や原子炉等の高放射線環境への応用も考えられる。他のビームブロッカー開発や粒子識別においても他の加速器実験への利用が考えられる。