Development of a new detector onboard micro satellite for the MeV gamma-ray observation

2023 Fiscal Year Final Research Report

• Project/Area Number: 21K13946
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 15020:Experimental studies related to particle-, nuclear-, cosmic ray and astro-physics
• Research Institution: Tokyo University of Science (2022-2023); Hiroshima University (2021)
• Principal Investigator: Uchida Yuusuke 東京理科大学, 創域理工学部先端物理学科, 助教 (70873040)
• Project Period (FY): 2021-04-01 – 2024-03-31
• Keywords: 半導体検出器 / X線ガンマ線 / CZT/CdTe

Outline of Final Research Achievements

The aim of this study has been to develop a compact detector for observing X-ray emissions from celestial objects and to prepare a detector for use on board a microsatellite. A CZT detector with high detection efficiency was adopted for the small satellite. However, previous studies have shown that the performance is expected to deteriorate due to radiation in orbit. Therefore, the effects of radiation on CZT and CdTe were studied by irradiating them with 200 MeV protons. The experiments showed that the energy resolution was degraded, but recovered slightly after a few days of irradiation. In this research project, the background of CZT at high altitude was also investigated by participating in the Japan-US-Sweden joint balloon experiment XL-Calibur using CZT.

Free Research Field

宇宙物理実験

Academic Significance and Societal Importance of the Research Achievements

本研究では放射線によりCZTおよびCdTe半導体の性能について調べることができた。この結果は宇宙環境下で使用する半導体放射線検出器のみならず、地上での放射線検出器に対しても共有できる結果である。