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Proceedings Paper

Photon-counting soft x-ray telescope for the Solar-C mission
Author(s): 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
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Paper 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.

Paper Details

Date Published: 6 October 2011
PDF: 13 pages
Proc. SPIE 8148, Solar Physics and Space Weather Instrumentation IV, 81480C (6 October 2011); doi: 10.1117/12.893276
Show Author Affiliations
Taro Sakao, Japan Aerospace Exploration Agency (Japan)
Noriyuki Narukage, Japan Aerospace Exploration Agency (Japan)
Masumi Shimojo, National Astronomical Observatory of Japan (Japan)
Saku Tsuneta, National Astronomical Observatory of Japan (Japan)
Yoshinori Suematsu, National Astronomical Observatory of Japan (Japan)
Satoshi Miyazaki, National Astronomical Observatory of Japan (Japan)
Shinsuke Imada, Japan Aerospace Exploration Agency (Japan)
Naoto Nishizuka, Japan Aerospace Exploration Agency (Japan)
Kyoko Watanabe, Japan Aerospace Exploration Agency (Japan)
Tadayasu Dotani, Japan Aerospace Exploration Agency (Japan)
Edward E. DeLuca, Harvard-Smithsonian Ctr. for Astrophysics (United States)
Shin-nosuke Ishikawa, Univ. of California, Berkeley (United States)

Published in SPIE Proceedings Vol. 8148:
Solar Physics and Space Weather Instrumentation IV
Silvano Fineschi; Judy Fennelly, Editor(s)

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