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Proceedings Paper

The Focusing Optics X-ray Solar Imager (FOXSI)
Author(s): Sam Krucker; Steven Christe; Lindsay Glesener; Steve McBride; Paul Turin; David Glaser; Pascal Saint-Hilaire; Gregory Delory; R. P. Lin; Mikhail Gubarev; Brian Ramsey; Yukikatsu Terada; Shin-nosuke Ishikawa; Motohide Kokubun; Shinya Saito; Tadayuki Takahashi; Shin Watanabe; Kazuhiro Nakazawa; Hiroyasu Tajima; Satoshi Masuda; Takashi Minoshima; Masumi Shomojo
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Paper Abstract

The Focusing Optics x-ray Solar Imager (FOXSI) is a sounding rocket payload funded under the NASA Low Cost Access to Space program to test hard x-ray focusing optics and position-sensitive solid state detectors for solar observations. Today's leading solar hard x-ray instrument, the Reuven Ramaty High Energy Solar Spectroscopic Imager (RHESSI) provides excellent spatial (2 arcseconds) and spectral (1 keV) resolution. Yet, due to its use of indirect imaging, the derived images have a low dynamic range (<30) and sensitivity. These limitations make it difficult to study faint x-ray sources in the solar corona which are crucial for understanding the solar flare acceleration process. Grazing-incidence x-ray focusing optics combined with position-sensitive solid state detectors can overcome both of these limitations enabling the next breakthrough in understanding particle acceleration in solar flares. The FOXSI project is led by the Space Science Laboratory at the University of California. The NASA Marshall Space Flight Center, with experience from the HERO balloon project, is responsible for the grazing-incidence optics, while the Astro H team (JAXA/ISAS) will provide double-sided silicon strip detectors. FOXSI will be a pathfinder for the next generation of solar hard x-ray spectroscopic imagers. Such observatories will be able to image the non-thermal electrons within the solar flare acceleration region, trace their paths through the corona, and provide essential quantitative measurements such as energy spectra, density, and energy content in accelerated electrons.

Paper Details

Date Published: 31 August 2009
PDF: 10 pages
Proc. SPIE 7437, Optics for EUV, X-Ray, and Gamma-Ray Astronomy IV, 743705 (31 August 2009); doi: 10.1117/12.827950
Show Author Affiliations
Sam Krucker, Univ. of California, Berkeley (United States)
Steven Christe, Univ. of California, Berkeley (United States)
Lindsay Glesener, Univ. of California, Berkeley (United States)
Steve McBride, Univ. of California, Berkeley (United States)
Paul Turin, Univ. of California, Berkeley (United States)
David Glaser, Univ. of California, Berkeley (United States)
Pascal Saint-Hilaire, Univ. of California, Berkeley (United States)
Gregory Delory, Univ. of California, Berkeley (United States)
R. P. Lin, Univ. of California, Berkeley (United States)
Mikhail Gubarev, NASA Marshall Space Flight Ctr. (United States)
Brian Ramsey, NASA Marshall Space Flight Ctr. (United States)
Yukikatsu Terada, Saitama Univ. (Japan)
Shin-nosuke Ishikawa, Institute of Space and Astronautical Science (Japan)
Univ. of Tokyo (Japan)
Motohide Kokubun, Institute of Space and Astronautical Science (Japan)
Shinya Saito, Institute of Space and Astronautical Science (Japan)
Univ. of Tokyo (Japan)
Tadayuki Takahashi, Institute of Space and Astronautical Science (Japan)
Univ. of Tokyo (Japan)
Shin Watanabe, Institute of Space and Astronautical Science (Japan)
Kazuhiro Nakazawa, Univ. of Tokyo (Japan)
Hiroyasu Tajima, Stanford Univ. (Japan)
Satoshi Masuda, Nagoya Univ. (Japan)
Takashi Minoshima, Nagoya Univ. (Japan)
Masumi Shomojo, NAOJ (Japan)


Published in SPIE Proceedings Vol. 7437:
Optics for EUV, X-Ray, and Gamma-Ray Astronomy IV
Stephen L. O'Dell; Giovanni Pareschi, Editor(s)

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