Development of 3-D position-sensitive microcalorimeters

2020 Fiscal Year Final Research Report

• Project/Area Number: 17H03523
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Nuclear engineering
• Research Institution: Kyushu University
• Principal Investigator: Iyomoto Naoko 九州大学, 工学研究院, 准教授 (40508173)
• Project Period (FY): 2017-04-01 – 2021-03-31
• Keywords: 放射線 / 分光 / 超伝導

Outline of Final Research Achievements

We developed transition-edge-sensor (TES) microcalorimeters for gamma rays. The energy resolution of a single-pixel device with a 1 mm x 1 mm x 0.7 mm bismuth absorber was 0.88 keV for 1.17 MeV gamma rays. We fabricated position-sensitive TES devices with a 19 mm x 0.5 mm x 0.5 mm lead absorber and obtained 1 mm position resolution for 662 keV gamma rays. We also fabricated a position-sensitive TES device with a 20 mm x 1 mm x 1 mm bismuth absorber. We modeled the position-sensitive devices and the actual and simulated pulses were in good agreement.

Free Research Field

放射線計測

Academic Significance and Societal Importance of the Research Achievements

本研究では従来のガンマ線検出器のエネルギー分解能を１桁程度改善することを目指すとともに、TES型マイクロカロリメータでの位置検出を試みている。ガンマ線分光・撮像は基盤技術であり、その高度化は多くの分野へ波及する。