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Proceedings Paper

Modeling and development of soft gamma-ray channeling
Author(s): Farzane Shirazi; Peter F. Bloser; James E. Krzanowskic; Jason S. Legere; Mark L. McConnell
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Paper Abstract

We have investigated the use of multilayer thin film structures for channeling and concentrating soft gamma rays with energies greater than 100 keV, beyond the reach of current grazing-incidence hard X-ray mirrors. A suitable arrangement of bent multilayer structures of alternating low and high-density materials will channel soft gamma-ray photons via total external reflection and then concentrate the incident radiation to a point. We describe the properties of W/Si multilayer structure produced by magnetron sputter technique with the required thicknesses and smoothness. We also have developed a flexible set of computer modeling tools to compute the optical properties of multilayer structures, predict the channeling efficiency for a given multilayer configuration and aid in the optimization of potential gamma-ray concentrator-based telescope designs. This modeling includes multilayer optical properties calculated by the IMD software, IDL gamma ray tracing code and a focal plane detector simulation by MEGAlib. This technology offers the potential for soft gamma-ray telescopes with focal lengths of less than 10 m, removing the need of formation flying spacecraft and providing greatly increased sensitivity for modest cost and complexity and opening the field up to balloon-borne instruments.

Paper Details

Date Published: 6 July 2018
PDF: 9 pages
Proc. SPIE 10699, Space Telescopes and Instrumentation 2018: Ultraviolet to Gamma Ray, 106995V (6 July 2018); doi: 10.1117/12.2312300
Show Author Affiliations
Farzane Shirazi, The Univ. of New Hampshire (United States)
Peter F. Bloser, The Univ. of New Hampshire (United States)
James E. Krzanowskic, The Univ. of New Hampshire (United States)
Jason S. Legere, The Univ. of New Hampshire (United States)
Mark L. McConnell, The Univ. of New Hampshire (United States)
Southwest Research Institute (United States)

Published in SPIE Proceedings Vol. 10699:
Space Telescopes and Instrumentation 2018: Ultraviolet to Gamma Ray
Jan-Willem A. den Herder; Shouleh Nikzad; Kazuhiro Nakazawa, Editor(s)

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