CdTe Spectroscopic-Imager Measurements with Bent Crystals for Broad Band Laue Lenses

TL;DR

This paper demonstrates the use of a Caliste-HD detector for spectroscopic imaging of bent crystal Laue lenses, advancing high-energy X-ray and gamma-ray focusing technology for astrophysics.

Contribution

It presents experimental results on a Caliste-HD detector module for Laue lens applications, improving detector performance for high-energy astrophysical observations.

Findings

Successful spectroscopic imaging of bent crystal Laue lens focal spots.

Enhanced detector capabilities for broad-band X-ray and gamma-ray focusing.

Validation of detector performance at the LARIX facility.

Abstract

In astrophysics, several key questions in the hard X soft Gamma-ray range (above 100 keV) require sensitivity and angular resolution that are hardly achievable with current technologies. Therefore, a new kind of instrument able to focus hard X and gamma-rays is essential. Broad band Laue lenses seem to be the only solution to fulfil these requirements, significantly improving the sensitivity and angular resolution of the X and gamma-ray telescopes. This type of high-energy optics will require highly performing focal plane detectors in terms of detection efficiency, spatial resolution, and spectroscopy. This paper presents the results obtained in the project 'Technological Readiness Increase for Laue Lenses (TRILL)' framework using a Caliste-HD detector module. This detector is a pixel spectrometer developed at CEA (Commissariat a Energie Atomique, Saclay, France). It is used to acquire spectroscopic images of the focal spot produced by Laue Lens bent crystals under a hard X-ray beam at the LARIX facility (University of Ferrara, Italy).