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Proceedings Paper

All-sky Compton imager
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Paper Abstract

The All-Sky Compton Imager (ASCI) is a mission concept for MeV Gamma-Ray astronomy. It consists of a compact array of cross-strip germanium detectors, shielded only by a plastic anticoicidence, and weighting less than 100 kg. Situated on a deployable structure at a distance of 10 m from the spacecraft orbiting at L2 or in a HEO, the ASCI not only avoids albedo- and spacecraft-induced background, but it benefits from a continuous all-sky exposure. The modest effective area is more than compensated by the 4 π field-of-view. Despite its small size, ASCI's γ-ray line sensitivity after its nominal lifetime of 3 years is ~ 10-6 ph cm-2 s-1 at 1 MeV for every γ-ray source in the sky. With its high spectral and 3-D spatial resolution, the ASCI will perform sensitive γray spectroscopy and polarimetry in the energy band 100 keV-10 MeV. The All-Sky Compton Imager is particularly well suited to the task of measuring the Cosmic Gamma-Ray Background – and simultaneously covering the wide range of science topics in gamma-ray astronomy.

Paper Details

Date Published: 24 July 2014
PDF: 7 pages
Proc. SPIE 9144, Space Telescopes and Instrumentation 2014: Ultraviolet to Gamma Ray, 91440H (24 July 2014); doi: 10.1117/12.2057535
Show Author Affiliations
Peter von Ballmoos, Institut de Recherche en Astrophysique et Planétologie (France)
Steven E. Boggs, Space Sciences Lab., Univ. of California, Berkeley (United States)
Pierre Jean, Institut de Recherche en Astrophysique et Planétologie (France)
Andreas Zoglauer, Space Sciences Lab., Univ. of California, Berkeley (United States)


Published in SPIE Proceedings Vol. 9144:
Space Telescopes and Instrumentation 2014: Ultraviolet to Gamma Ray
Tadayuki Takahashi; Jan-Willem A. den Herder; Mark Bautz, Editor(s)

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