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Proceedings Paper

Compact array of CdTe spectrometers for a prototype balloon flight
Author(s): Ezio Caroli; Ariano Donati; Gianni Landini; Filomena Schiavone; John Buchan Stephen; Giulio Ventura; Stefano Del Sordo; Salvatore Giarrusso; M. Strazzeri; Gianfranco Taiocchi
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Paper Abstract

The CACTuS (Compact Array of Cadmium Telluride Micro Spectrometers) instrument was constructed as a prototype detection plane for the Coded Imager and Polarimeter for High Energy Radiation (CIPHER) telescope. The instrument, flown as a 'piggy-back' experiment on a stratospheric balloon as part of the Summer 2002 trans-mediterranean flight campaign from the Milo Italian balloon base in Sicily, was constructed in order to verify the feasibility of using this kind of position sensitive detector for hard X and soft gamma ray polarimetry and imaging, with the objective of studying the instrumental background at stratospheric balloon altitudes over the 20-1000 keV energy range. Of particular interest is the spectrum and distribution of Compton scattered events that trigger two pixel (double) events, the recognition of which is essential for providing a high sensitivity to linear polarisation. It was also used to evaluate the efficiency and the reliability of an off-line numerical algorithm to be applied to the CdTe flight data for signal compensation, which uses the amplitudes obtained by readout electronics with a double shaping filter stage.

Paper Details

Date Published: 11 March 2003
PDF: 9 pages
Proc. SPIE 4851, X-Ray and Gamma-Ray Telescopes and Instruments for Astronomy, (11 March 2003); doi: 10.1117/12.461339
Show Author Affiliations
Ezio Caroli, IASF-CNR (Italy)
Ariano Donati, IASF-CNR (Italy)
Gianni Landini, IASF-CNR (Italy)
Filomena Schiavone, IASF-CNR (Italy)
John Buchan Stephen, IASF-CNR (Italy)
Giulio Ventura, IASF-CNR (Italy)
Stefano Del Sordo, IASF-CNR (Italy)
Salvatore Giarrusso, IASF-CNR (Italy)
M. Strazzeri, IASF-CNR (Italy)
Gianfranco Taiocchi, TAKES S.d.f. Ponteranica (Italy)

Published in SPIE Proceedings Vol. 4851:
X-Ray and Gamma-Ray Telescopes and Instruments for Astronomy
Joachim E. Truemper; Harvey D. Tananbaum, Editor(s)

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