B01-Ⅰ
B01-I:Improvement of position resolution for XRPIX and its application to the X-ray Talbot Interferometer without using G2 gratings.
Description
- X-ray Talbot interferometers are one of the X-ray phase contrast imaging techniques, for which great progress has been made recently. The X-ray Talbot interferometer can be constructed with a simple configuration using a micro-focus X-ray source, 2 kinds of grating, and an X-ray detector. In fact, application to medical use has been started. Nevertheless, the grating set on the X-ray detector, called G2 grating, should be special; micro machining to thick material is needed so as to absorb hard X-rays.
- If X-ray detectors with finer position resolution are available, we don’t need the G2 grating in principle. We aim to realize such X-ray Talbot interferometer by employing XRPIX, which are under development by the B01 group.
- We would operate XRPIX in photon-counting mode to strong intensity X-ray incidence. By using charge spread inside the detector for one X-ray photon event, sub-pixel resolution is expected. Energy resolution of XRPIX can also be a benefit to improve the performance of the interferometer.
X-ray image of a mosque obtained with an X-ray CCD and a micro-focus X-ray source (Atsushi Fumihara 2009). Very fine structure by refractive contrast is visible at the edge of in the image. We aim to obtain phase-contrast image over the whole area of the material by the method of the Talbot interferometer. Using XRPIX would be necessary for efficient photon-counting.
Member
Principle Investigator
http://wwwxray.ess.sci.osaka-u.ac.jp/~hayasida
Associate Professor Osaka University, Ph.D, High Energy Astrophysics Experiment & Observation,
Leading the B01-I group
Co-Inversigator : Takeshi-Go Tsuru
Professor Kyoto University, Ph.D., High Energy Astrophysics Experiment & Observation,
Leading the development of XRPIX
Publications
- Soft x-ray imager (SXI) onboard ASTRO-H, Kiyoshi Hayashida, Hiroshi Tsunemi, Takeshi Go Tsuru, Tadayasu Dotani, Hiroshi Nakajima, Masanobu Ozaki, Naohisa Anabuki, Chikara Natsukari, Junko S.Hiraga, Hiroshi Tomida, Takayoshi Kohmura, Takayoshi, Hiroshi Murakami, Koji Mori, et al., SPIE proc., Volume 8443, article id. 844323, 9 pp. (2012)
- X-ray gamma-ray polarimetry small satellite PolariS, Kiyoshi Hayashida, Daisuke Yonetoku, Shuichi Gunji, Toru Tamagawa,; Tatehiro Mihara, Tsunefumi Mizuno, et al., SPIE proc., Volume 8443, article id. 84434G, 9 pp. (2012)
- Suzaku Observations of the Type 2 QSO in the Central Galaxy of the Phoenix Cluster, Shutaro Ueda,?Kiyoshi Hayashida,? Naohisa Anabuki,? Hiroshi Nakajima,? Katsuji Koyama,? Hiroshi Tsunemi,?The Astrophysical Journal, Volume 778, article id. 33, 8 pp. (2013).
- Gas Bulk Motion in the Perseus Cluster Measured with Suzaku, Tamura,?T.; Yamasaki,?N.?Y.; Iizuka,?R.; Fukazawa,?Y.; Hayashida,?K.; Ueda,?S.; Matsushita,?K.; Sato,?K.; Nakazawa,?K.; Ota,?N.; Takizawa,?M., The Astrophysical Journal, Volume 782, Issue 1, article id. 38, 15 pp. (2014).