Research Project
Grant-in-Aid for Challenging Exploratory Research
We have invented a new type of X-ray interferometers consisting of a grating and an X-ray pixel detector. By stacking multiple X-ray images obtained with this configuration, we can measure the profile of the light source in principle. However, diffraction blurs the image. We thus select X-ray events of which energy satisfy the interferometric condition called Talbot effect. to obtain a sharp image. We name this Multiple Image X-ray Interferometer Module (MIXIM). We can obtain angular resolution better than the Chandra satellite (0.5 arcsecond) with very small satellite of 50 cm size.MIXIM requires positional resolution of a few micrometer for the detector. We thus introduce CMOS pixel detector designed for visible light and succeeded in detecting X-rays at room temperature. We conducted X-ray irradiation experiment at a synchrotron facility using this detector and demonstrated that MIXIM principle surely works. Our current record is 0.3 arcsecond in resolution.
天文学の観測において、優れた角度分解能が重要であることはガリレオ以来の様々な発見が証明しており、最近のブラックホールのイメージのように社会的インパクトも大きい。X線天文学では、斜入射X線ミラーを使ったシステムが必須であるという固定観念が蔓延しているが、本研究は全く異なる原理を提案し、かつ、技術的コスト的に困難とされているChandra衛星の角度分解能を超える見込みを与えた。我々の提案の方法は、格子の周期、格子・検出器間距離に関してスケーラブルで、0.1秒角、0.01秒角、さらにはマイクロ秒角のシステムも可能である。将来の様々な衛星形態に適応可能である。
All 2019 2018 2017 2016 2015
All Journal Article (29 results) (of which Int'l Joint Research: 21 results, Peer Reviewed: 25 results, Open Access: 19 results, Acknowledgement Compliant: 5 results) Presentation (39 results) (of which Int'l Joint Research: 9 results, Invited: 1 results)
Publications of the Astronomical Society of Japan
Volume: 71 Issue: 1 Pages: 17-17
10.1093/pasj/psy135
Astronomische Nachrichten
Volume: 340 Issue: 1-3 Pages: 221-225
10.1002/asna.201913593
Proceedings of the SPIE
Volume: 10699 Pages: 29-29
10.1117/12.2314181
Volume: 10699 Pages: 1069923-1069923
10.1117/12.2311446
Optics Express
Volume: 26 Issue: 16 Pages: 21044-21044
10.1364/oe.26.021044
Volume: 70 Issue: 6 Pages: 113-113
10.1093/pasj/psy118
Volume: 70 Issue: 3 Pages: 1-16
10.1093/pasj/psy027
Journal of Astronomical Telescopes, Instruments, and Systems
Volume: 4 Issue: 02 Pages: 021402-021402
10.1117/1.jatis.4.2.021402
Volume: 4 Issue: 01 Pages: 1-1
10.1117/1.jatis.4.1.011211
Volume: 70 Issue: 2 Pages: 9-9
10.1093/pasj/psx138
Volume: 70 Issue: 2 Pages: 10-10
10.1093/pasj/psx127
Volume: 70 Issue: 2 Pages: 11-11
10.1093/pasj/psy004
Volume: 70 Issue: 2 Pages: 12-12
10.1093/pasj/psx156
Volume: 70 Issue: 2 Pages: 13-13
10.1093/pasj/psx147
Volume: 70 Issue: 2 Pages: 14-14
10.1093/pasj/psx072
Volume: 70 Issue: 2 Pages: 15-15
10.1093/pasj/psx083
Volume: 70 Issue: 2 Pages: 16-16
10.1093/pasj/psx151
Volume: 70 Issue: 2 Pages: 17-17
10.1093/pasj/psx154
Volume: 70 Issue: 2 Pages: 21-21
10.1093/pasj/psx116
Volume: 印刷中 Issue: 3
10.1093/pasj/psx025
130006246109
Astronomy & Astrophysics
Volume: 606 Pages: 1-8
10.1051/0004-6361/201730497
Nature
Volume: 551 Issue: 7681 Pages: 478-480
10.1038/nature24301
Publicatrions of the Astronomical Society Japan
Volume: 印刷中
SPIE proceeding
Volume: 9905 Pages: 990557-990557
10.1117/12.2232182
Proc. SPIE
Volume: 9905 Pages: 99051A-99051A
10.1117/12.2232472
The Astrophysical Journal Letters
Volume: 837 Issue: 1 Pages: 15-23
10.3847/2041-8213/aa61fa
Volume: 535 Issue: 7610 Pages: 117-121
10.1038/nature18627
Volume: 00 Issue: SP1 Pages: 1-11
10.1093/pasj/psw027
PASJ
Volume: 67 Issue: SP1 Pages: 114-122
10.1093/pasj/psv114