Development of internal active target for beam recycle technique

2023 Fiscal Year Final Research Report

• Project/Area Number: 22K18127
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 80040:Quantum beam science-related
• Research Institution: Kyoto University
• Principal Investigator: Ogawara Ryo 京都大学, 化学研究所, 助教 (00807729)
• Project Period (FY): 2022-04-01 – 2024-03-31
• Keywords: アクティブ標的 / 不安定核 / 内部標的 / ビームリサイクル / 重イオン蓄積リング

Outline of Final Research Achievements

The beam recycle technique is developed to realize precise nuclear reaction research with rare-radioactive isotope (RI). In the beam recycle technique, rare-RIs are accumulated in a heavy-ion storage ring and are continuously collisions with an internal target (IAT) until a nuclear reaction occurs. However, as the beam passes through the inner target, the energy and angular dispersion increases. This makes it difficult to accumulation rare-RIs in the storage ring. To compensate for these dispersions, we developed an active internal target (IAT) that acquires information about the accumulated rare-RIs and produces feedback signal. In this study, the prototype IAT using a MCP and feedback signal circuit were developed and their performances were evaluated. As a result, the specifications required for the IAT were clarified, and a circuit for a feedback signal processing was successfully developed.

Free Research Field

実験核物理

Academic Significance and Societal Importance of the Research Achievements

本研究で開発したIAT、及びフィードバック用回路は新しい量子ビーム技術であるビームリサイクルに必要不可欠であり、その技術開発を大きく進展させるものである。ビームリサイクルの開発が進むことで今まで実現困難であった不安定核実験が可能になるため、その根幹技術の一つであるIAT、及びフィードバック用回路の開発には大きな学術的意義がある。また、ビームリサイクルは生成した不安定核を無駄なく使用するための技術であり、ビームリサイクルと同様の実験を既存の方法で行う場合よりも消費電力が大きく改善される可能性が高いという社会的意義がある。