Latest photon detectors and development of super high resolution TOF detector using Cherenkov radiation

2015 Fiscal Year Final Research Report

• Project/Area Number: 25600141
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Quantum beam science
• Research Institution: Osaka University
• Principal Investigator: Fukuda Mitsunori 大阪大学, 理学(系)研究科(研究院), 准教授 (50218939)
• Co-Investigator(Renkei-kenkyūsha): NISHIMURA Daiki 東京理科大学, 理工学部, 助教 (30612147)
• Research Collaborator: TAKECHI Maya 新潟大学, 大学院自然科学研究科, 助教 ; TANAKA Masaomi 大阪大学, 大学院理学研究科, 大学院生
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: チェレンコフ光 / 高時間分解能 / 飛行時間検出器 / 粒子識別

Outline of Final Research Achievements

By using new-type fast photomultiplier tubes, a new Cherenkov Time-of-Flight detector has been developed for measurements of heavy ions. Is has been tested at the heavy-ion synchrotron facility HIMAC in National Institute of Radiological Sciences, Japan, under various conditions of number of Cherenkov photons by changing beam species and energies. As a result, we achieved the initial target value of the resolution σ ≦ 10 ps. Furthermore, applying various improvements, we have accomplished the best value of the time resolution σ = ～5 ps (including system resolution) for 400A MeV 132 Xe beam. After this, we will improve this detector on the points of lager sizes and versatility.

Free Research Field

原子核物理学