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Design of a soft gamma-ray focusing telescope for the study of nuclear lines

Chen, C. M. Hubert and Christensen, Finn E. and Harrison, Fiona A. and Mao, Peter H. and Windt, David L. (2003) Design of a soft gamma-ray focusing telescope for the study of nuclear lines. In: X-Ray and Gamma-Ray Telescopes and Instruments for Astronomy. Proceedings of SPIE. No.4851. Society of Photo-optical Instrumentation Engineers (SPIE) , Bellingham, WA, pp. 1356-1365. ISBN 9780819446305.

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We have studied the design of astronomical multilayer telescopes optimized for performance from 5 to 200 keV. This region of the spectrum contains important nuclear lines that are observable in supernovae and their remnants. The study of these lines can help to differentiate currently competing theories of supernova explosion. Our telescope design will enable us to measure the spectral lines of isotopes such as Ni-56 in Type Ia supernovae and Ti-44 in core-collapse remnants, as well as to observe active galactic nuclei at gamma-ray energies. We considered the performances of multilayers of various material pairs, including W/Si, Pt/C and Ni93V7/Si, as employed in conical-approximation Wolter I optics. We experimented with dividing the energy band of interest into several sections, and optimizing different groups of mirror shells within a single telescope for each smaller energy band. Different material pairs are also used for different energy bands, in order to obtain a higher overall performance. We also consider the significance of the energy bandwidth on the effectiveness of Joensen's parametrization of the multilayer thickness profile, and on the mirror performance within the band.

Item Type:Book Section
Related URLs:
URLURL TypeDescription
Christensen, Finn E.0000-0001-5679-1946
Harrison, Fiona A.0000-0003-2992-8024
Additional Information:© 2003 Society of Photo-optical Instrumentation Engineers (SPIE). The research reported in this paper is supported by NASA's Supporting Research and Technology (SR&T) grant NAG5-5289. The multilayer optimization programme was run in part using the Hewlett-Packard V2500 computer system operated by Caltech's Center for Advanced Computing Research (CACR). Access to this system was provided by Prof. Thomas A. Prince. We are very grateful for all their support.
Group:Space Radiation Laboratory
Funding AgencyGrant Number
Subject Keywords:Gamma-ray astrophysics, multilayer optimization, Type Ia supernova
Series Name:Proceedings of SPIE
Issue or Number:4851
Record Number:CaltechAUTHORS:20180731-085524568
Persistent URL:
Official Citation:C. M. Hubert Chen, Finn Erland Christensen, Fiona A. Harrison, Peter H. Mao, David L. Windt, "Design of a soft gamma-ray focusing telescope for the study of nuclear lines", Proc. SPIE 4851, X-Ray and Gamma-Ray Telescopes and Instruments for Astronomy, (11 March 2003); doi: 10.1117/12.461419;
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:88369
Deposited By: Tony Diaz
Deposited On:31 Jul 2018 16:10
Last Modified:16 Nov 2021 00:26

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