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          Institute: MPI für extraterrestrische Physik     Collection: High Energy Astrophysics at MPE     Display Documents

ID: 12127.0, MPI für extraterrestrische Physik / High Energy Astrophysics at MPE
The space-borne INTEGRAL-SPI gamma ray telescope: Test and calibration campaigns
Authors:Schanne, Stephane; Cordier, Bertrand; Gros, Maurice; Mur, Michel; Crespin, Sylvain; Joly, Serge; Knödlseder, Jürgen; Mandrou, Pierre; Paul, Philippe; Roques, Jean-Pierre; Vedrenne, Gilbert; André, Yves; Clair, Marie-Anne; Clauss, Pascale; Georgii, Robert; Lichti, Giselher; von Kienlin, Andreas; Dubath, Pierre
Date of Publication (YYYY-MM-DD):2002-06
Title of Journal:IEEE Transactions on Nuclear Science
Journal Abbrev.:IEEE Trans. Nucl. Sci.
Issue / Number:3
Start Page:1226
End Page:1232
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:The spectrometer SPI aboard the ESA INTEGRAL satellite, which will be launched in 2002, will study the gamma ray sky in the 20-keV to 8-MeV energy band. It achieves the excellent spectral resolution of about 2 keV for photons of 1 MeV thanks to its 19 germanium detectors. A coded mask imaging technique provides an angular resolution of 2degrees. An active BGO veto shield is used for the definition of the field of view and for background rejection. After integration and testing at ONES in Toulouse, the flight model of SPI recently underwent a one-month prelaunch calibration at the CEA center of Bruyeres le Ch (a) over cap tel, using an accelerator for homogeneity measurements and high-activity radioactive sources for imaging performance measurements. This paper presents the scientific goals and the different detector components of SPI and reports on the testing and calibration campaigns. The methods used to achieve good timing alignment using the digital front end electronics are described and the first detector performance and imaging capabilities are presented.
Free Keywords:calibration; gamma ray astronomy; germanium spectrometer; INTEGRAL
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für extraterrestrische Physik
External Affiliations:CEA Saclay, DSM, DAPNIA, SEI, F-91191 Gif Sur Yvette, France; CEA Saclay, DSM, DAPNIA, SEI, F-91191 Gif Sur Yvette, France; Ctr Etud Bruyeres Le Chatel, DAM, DPTA, F-91680 Bruyeres Le Chatel, France; CESR, F-31027 Toulouse, France; CNES, F-31401 Toulouse, France; Max Planck Inst Extraterr Phys, MPE, D-85748 Garching, Germany; ISDC, CH-1290 Versoix, Switzerland
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