Focusing effect of bent GaAs crystals for γ-ray Laue lenses: Monte Carlo and experimental results

Journal
Date Issued
2016
Author(s)
Virgilli, E.
•
Frontera, F.
•
Rosati, P.
•
Bonnini, E.
•
Buffagni, E.
•
Ferrari, C.
•
•
•
•
•
DOI
Abstract
We report on results of observation of the focusing effect from the planes (220) of Gallium Arsenide (GaAs) crystals. We have compared the experimental results with the Monte Carlo simulations of the focusing capability of GaAs tiles performed with a dedicated ray-tracer. The GaAs tiles were bent using a lapping process developed at the cnr/imem - Parma (Italy) in the framework of the laue project, funded by ASI, dedicated to build a broad band Laue lens prototype for astrophysical applications in the hard X-/soft γ-ray energy range (80-600 keV). We present and discuss the results obtained from their characterization, mainly in terms of focusing capability. Bent crystals will significantly increase the signal to noise ratio of a telescope based on a Laue lens, consequently leading to an unprecedented enhancement of sensitivity with respect to the present non focusing instrumentation.
Volume
41
Issue
1-2
Start page
307
Uri
Url
Issn Identifier
0922-6435
Ads BibCode
2016ExA....41..307V
Rights
open.access
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