Photon-counting soft x-ray telescope for the Solar-C mission

Taro Sakao; Noriyuki Narukage; Masumi Shimojo; Saku Tsuneta; Yoshinori Suematsu; Satoshi Miyazaki; Shinsuke Imada; Naoto Nishizuka; Kyoko Watanabe; Tadayasu Dotani; Edward E. DeLuca; Shin-nosuke Ishikawa

doi:10.1117/12.893276

6 October 2011 Photon-counting soft x-ray telescope for the Solar-C mission

Taro Sakao, Noriyuki Narukage, Masumi Shimojo, Saku Tsuneta, Yoshinori Suematsu, Satoshi Miyazaki, Shinsuke Imada, Naoto Nishizuka, Kyoko Watanabe, Tadayasu Dotani, Edward E. DeLuca, Shin-nosuke Ishikawa

Author Affiliations +

Proceedings Volume 8148, Solar Physics and Space Weather Instrumentation IV; 81480C (2011) https://doi.org/10.1117/12.893276
Event: SPIE Optical Engineering + Applications, 2011, San Diego, California, United States

Abstract

We report instrument outline as well as science of the photon-counting soft X-ray telescope that we have been studying as a possible scientific payload for the Japanese Solar-C mission whose projected launch around 2019. Soft X-rays (~1- 10 keV) from the solar corona include rich information on (1) possible mechanism(s) for heating the bright core of active regions seen in soft X-rays (namely, the hottest portion in the non-flaring corona), (2) dynamics and magnetohydrodynamic structures associated with magnetic reconnection processes ongoing in flares, and even (3) generation of supra-thermal distributions of coronal plasmas associated with flares. Nevertheless, imaging-spectroscopic investigation of the soft X-ray corona has so far remained unexplored due to difficulty in the instrumentation for achieving this aim. With the advent of recent remarkable progress in CMOS-APS detector technology, the photon-counting X-ray telescope will be capable of, in addition to conventional photon-integration type exposures, performing imaging-spectroscopic investigation on active regions and flares, thus providing, for example, detailed temperature information (beyond the sofar- utilized filter-ratio temperature) at each spatial point of the observing target. The photon-counting X-ray telescope will emply a Wolter type I optics with a piece of a segmented mirror whose focal length 4 meters, combined with a focal-plane CMOS-APS detector (0.4-0.5"/pixel) whose frame read-out rate required to be as high as 1000 fps.

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Taro Sakao, Noriyuki Narukage, Masumi Shimojo, Saku Tsuneta, Yoshinori Suematsu, Satoshi Miyazaki, Shinsuke Imada, Naoto Nishizuka, Kyoko Watanabe, Tadayasu Dotani, Edward E. DeLuca, and Shin-nosuke Ishikawa "Photon-counting soft x-ray telescope for the Solar-C mission", Proc. SPIE 8148, Solar Physics and Space Weather Instrumentation IV, 81480C (6 October 2011); https://doi.org/10.1117/12.893276

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KEYWORDS

X-rays

X-ray telescopes

Mirrors

Coronagraphy

Telescopes

Plasmas

Space telescopes

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