Development of a robust Compton camera with GEM and new inorganic scintillators

2015 Fiscal Year Final Research Report

• Project/Area Number: 26610066
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: Shinshu University
• Principal Investigator: HASEGAWA Yoji 信州大学, 学術研究院理学系, 准教授 (70324225)
• Project Period (FY): 2014-04-01 – 2016-03-31
• Keywords: 放射線検出器

Outline of Final Research Achievements

Detectors reconstructing directions of gamma rays are utilized in many fields for physics, diagnostic, and environment. One of them is a Compton camera which consists of two kinds of detectors: one for Compton recoil electrons and the other for scattered gamma rays in order to reconstruct incident gamma rays. The purpose of this study is to develop a simple and robust detector with a common readout for measuring scintillation lights from gas amplification for electrons
and from inorganic scintillators for gamma rays.
A chamber equipped gas electron multipliers(GEMs) for detecting electrons are filled with mixed gas of Ar(90%)+CH4(10%). Dependence of light yield on gas amplification is measured with irradiation of X rays. A positive correlation can be found between them. However, light yields is too small to reconstruct the tracks of electrons, therefore, additional improvement is required.

Free Research Field

素粒子物理学実験