Development status of a Laue lens project for gamma-ray astronomy

Frontera, F.; Loffredo, G.; Pisa, Alessandro; Milani, Lorenzo; Nobili, Francesco; Auricchio, N.; Carassiti, V.; Evangelisti, F.; Landi, Luca; Squerzanti, S.; Andersen, K.H.; Courtois, P.; Amati, L.; Caroli, E.; Landini, G.; Silvestri, S.; Stephen, J. B.; Poulsen, J. M.; Negri, B.; Pareschi, G.

doi:10.1117/12.736038

Cited by 6 publications

(5 citation statements)

References 16 publications

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“…The requirements as to the accuracy of alignment of crystals depend strongly on the focal distance and the mosaicity of crystals used. This is attributable to the fact that the sensitivity of a telescope with a Laue lens increases with increasing focal distance and decreasing crystal mosaicity [222,223]. However, a very accurate alignment of crystals is needed to achieve a large focal distance and reduce the mosaicity.…”

Section: Design and Assembly Of A Laue Lensmentioning

confidence: 99%

Focusing diffraction optics for orbital telescopes

Лидер

2022

Optics and Spectroscopy

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The review is devoted to the principles, state of the art and problems of diffractive optics used to focus X-ray and γ-radiation in telescopes at orbital stations. Various multilayer structures for normal incidence telescopes, supermirrors for Wolter optics, Laue lens as a soft γ-radiation concentrator, as well as modified Fresnel zone plates for focusing radiation in a wide energy range with an unprecedented high angular resolution (10-1-10-3''). Keywords: X-ray and γ-radiation, X-ray and γ-telescopes, diffraction, multilayer structures, Laue lens, Fresnel zone plates.

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Section: Design and Assembly Of A Laue Lensmentioning

confidence: 99%

Focusing diffraction optics for orbital telescopes

Лидер

2022

Optics and Spectroscopy

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“…Later, in a project in collaboration with the CESR laboratory at the University of Toulouse, a lens for astrophysics was built [2] and for the first time an astrophysical source was observed (the Crab nebula) during a stratospheric flight (the CLAIRE project [3]). More recently, in the project named HAXTEL (Hard X-ray TELescope) small prototypes of Laue lenses have been built and successfully tested to demonstrate the capability to set a number of mosaic Cu crystals with an accurate positioning system in a reasonable short time capable to focus energy of ∼100 keV [4,5]. However, although flat crystals have the advantage of a relatively easy production in large quantity with good reproducibility in terms of dimensions and mosaic spread, they have limits that can be summarized as follows:…”

Section: Introductionmentioning

confidence: 99%

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

Virgilli¹,

Frontera²,

Rosati³

et al. 2015

Exp Astron

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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 simulations of the focusing capability of GaAs tiles through a developed Monte Carlo. 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.

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“…Lens prototypes have already been successfully built in the LARIX facility 4 of the University of Ferrara. [5][6][7][8] Preliminary simulation results of a petal made with Ge(111) and GaAs(111) was reported in [9]. The petal that is being built is made up of both GaAs(220) and Ge(111) crystal tiles.…”

Section: Introductionmentioning

confidence: 99%

Results of the simulations of the petal/lens as part of the LAUE project

Valsan,

Frontera,

Virgilli

et al. 2013

Preprint

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In the context of the LAUE project for focusing hard X-/gamma rays, a petal of the complete lens is being assembled at the LARIX facility in the Department of Physics and Earth Science of the University of Ferrara. The lens petal structure is composed of bent Germanium and Gallium Arsenide crystals in transmission geometry. We present the expectations derived from a mathematical model of the lens petal. The extension of the model for the complete LAUE project in the 90 -600 keV energy range will be discussed as well. A quantitative analysis of the results of these simulations is also presented.

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Development status of a Laue lens project for gamma-ray astronomy

Cited by 6 publications

References 16 publications

Focusing diffraction optics for orbital telescopes

Focusing diffraction optics for orbital telescopes

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

Results of the simulations of the petal/lens as part of the LAUE project

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