Development of a bent Si crystal for X-ray imaging polarimetry

2014 Fiscal Year Final Research Report

• Project/Area Number: 25870744
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Astronomy; Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: Japan Aerospace Exploration Agency
• Principal Investigator: IIZUKA Ryo 独立行政法人宇宙航空研究開発機構, 宇宙科学研究所, 研究員 (50548120)
• Project Period (FY): 2013-04-01 – 2015-03-31
• Keywords: X線天文学 / X線偏光計 / シリコン結晶 / ブラッグ反射 / ダイヤモンドライクカーボン

Outline of Final Research Achievements

X-ray polarization is the key to search for the spatial structure and emission mechanism around the celestial object in the extreme condition. However, the progress for the polarimetry is considerably delayed because of technical difficulties. In order to make a breakthrough in the field of X-ray polarimetry, we have developed a new type of Bragg crystal polarimeter with the large bent Si crystals. We focused the energy band including the series of Fe-K line emission (~7 keV) to give important information in the X-ray astronomy. It it difficult to bent the crystals with the high accuracy. We succeeded to bent the crystals to the shape of paraboloid and paraboloid of revolution with DLC method and CFRP.

Free Research Field

Ｘ線天文学