DocumentCode :
2628878
Title :
Polarimetry with a Laue Lens and CZT pixel detector
Author :
Caroli, Ezio ; Silva, Rui M Curado da ; Stephen, John B. ; Pisa, Alessandro ; Auricchio, Natalia ; Sordo, Stefano Del ; Donati, Ariano ; Schiavone, Filomena ; Landini, Gianni ; Honkimaki, Veijo ; Frontera, Filippo
Author_Institution :
INAF/IASF-Bologna, I40129 Italy
fYear :
2008
fDate :
19-25 Oct. 2008
Firstpage :
90
Lastpage :
95
Abstract :
A new generation of high sensitivity telescopes based on the use of Laue lenses coupled with high efficiency solid state focal plane detectors has been identified as a possibility for hard X and soft gamma ray astronomy. For this kind of space mission, polarimetry is recognized as a very important observational parameter and therefore this capability should be included as one of the primary scientific requirements. In this framework our group has realized a small experiment to demonstrate that the combination of a Laue Lens, built using Cu mosaic crystals, with a CZT pixel detector is capable of measuring the polarization of hard X ray sources contemporaneously with spectroscopy and imaging. This experiment was performed at the beginning of March 2008 using the ID15B beam line at ESRF (Grenoble). The experiment was based on a pixel CZT detector (5 mm thick array with 11×11 pixels of 2.5×2.5 mm2) with a sensitive area of 3×3 cm2 in conjunction with a mosaic Cu crystal (15×15 mm2, 4 mm thick) used in the Laue diffraction configuration. During the tests the Cu crystal was rotated so as to simulate a Laue lens ring, and the detector was moved in order to have the diffracted beam always impinging on the same pixel. The beam at the ID15B have allow us to test the response of this system, with almost 100% linearly polarized photon at ∼90, 270, 350 keV. In this paper we describe the experimental setup and we report on the preliminary results, with particular emphasis on the evaluation of possible systematic effect introduced in the detected polarization of the impinging photon by the Laue diffraction process.
Keywords :
Astronomy; Diffraction; Gamma ray detection; Gamma ray detectors; Lenses; Polarimetry; Polarization; Solid state circuits; Space missions; Telescopes;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Nuclear Science Symposium Conference Record, 2008. NSS '08. IEEE
Conference_Location :
Dresden, Germany
ISSN :
1095-7863
Print_ISBN :
978-1-4244-2714-7
Electronic_ISBN :
1095-7863
Type :
conf
DOI :
10.1109/NSSMIC.2008.4775131
Filename :
4775131
Link To Document :
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