Development of efficient Laue lenses: experimental results and projects

Nicolas Barrière; John Tomsick; Steven Boggs; Julien Rousselle; Peter von Ballmoos

doi:10.1117/12.857813

30 July 2010 Development of efficient Laue lenses: experimental results and projects

Nicolas Barrière, John Tomsick, Steven Boggs, Julien Rousselle, Peter von Ballmoos

Proceedings Volume 7732, Space Telescopes and Instrumentation 2010: Ultraviolet to Gamma Ray; 773226 (2010) https://doi.org/10.1117/12.857813
Event: SPIE Astronomical Telescopes + Instrumentation, 2010, San Diego, California, United States

Abstract

Laue lenses are an emerging technology allowing the concentration of soft gamma rays in the ~ 100 keV - 1.5 MeV energy range. Two lens designs based on recently measured crystals are presented in this paper. A lens dedicated to the understanding of the progenitors and explosion physics of Type Ia supernovae through the observation of the 847 keV line produced by the decay chain of the radionuclide ⁵⁶Co. With a Compton camera at the focus (as proposed for the DUAL mission), we find that a space-borne telescope could reach a 3-σ sensitivity of 1.5×10^-6 ph/s/cm² for a 3% broadened line in 10⁵ s, enabling the detection of several events per year with enough significance to strongly constrain the models. On the other hand, a second generation prototype is proposed. Made to realize a balloon-borne telescope focusing around the electron-positron annihilation line (511 keV), this lens would primarily be a technological demonstrator. However with an estimated sensitivity of 5×10^-6 ph/s/cm² in 10⁴ s observation time, this Laue lens telescope could bring new hints in the search of the origin of the Galactic positrons. To build this prototype, a dedicated X-ray beamline has been built at the Space Sciences Laboratory.

Citation Download Citation

Nicolas Barrière, John Tomsick, Steven Boggs, Julien Rousselle, and Peter von Ballmoos "Development of efficient Laue lenses: experimental results and projects", Proc. SPIE 7732, Space Telescopes and Instrumentation 2010: Ultraviolet to Gamma Ray, 773226 (30 July 2010); https://doi.org/10.1117/12.857813

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