Development of a novel ultra-fast gamma-ray detection method based on electro-optic effects

• Project/Area Number: 18K18772
• Research Category: Grant-in-Aid for Challenging Research (Exploratory)
• Allocation Type: Multi-year Fund
• Review Section: Medium-sized Section 15:Particle-, nuclear-, astro-physics, and related fields
• Research Institution: Japan Aerospace EXploration Agency
• Principal Investigator: KOKUBUN Motohide 国立研究開発法人宇宙航空研究開発機構, 宇宙科学研究所, 准教授 (50334248)
• Project Period (FY): 2018-06-29 – 2020-03-31
• Project Status: Completed (Fiscal Year 2019)
• Budget Amount: ¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000); Fiscal Year 2019: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2018: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
• Keywords: ガンマ線検出器 / 電気光学効果 / 陽電子断層法 / 放射線検出器 / ガンマ線 / 超高速検出 / レーザー / 超高速

Outline of Final Research Achievements

In this research, a proof-of-concept exeperiment on a novel ultra fast gamma-ray detection method based on electro-optic effects has been conducted. A probe laser through a device of an electro-optic material is monitored to detect a small temporal change of its light yeild caused by inernal ionizatinos by gamma-ray photons.

Academic Significance and Societal Importance of the Research Achievements

ガンマ線と物質の反応を、電気光学効果を介した光学特性の変化として検出するアイディアは近年になって”Rad-Optics”として提唱され、原理的には極めて有望であるが、まだ海外でも原理実証段階にあるため本研究は先駆性の観点で学術的意義を有する。また将来的には陽電子断層法の画像分解能に劇的な向上をもたらす医療応用の観点からの社会的意義を持つ。