Title of article
Characterization of the in-flight degradation of the INTEGRAL/SPI detectors
Author/Authors
Lonjou، نويسنده , , V. and Roques، نويسنده , , J.P. and Von Ballmoos، نويسنده , , P. and Jean، نويسنده , , P. and Knodlseder، نويسنده , , J. and Skinner، نويسنده , , G. and Thevenin، نويسنده , , A. and Weidenspointner، نويسنده , , G.، نويسنده ,
Pages
11
From page
320
To page
330
Abstract
SPI is a high spectral resolution gamma ray telescope which was launched on 2002 October 17 on-board INTEGRAL (INTErnational Gamma Ray Astrophysics Laboratory). The SPI camera consists of 19 high-purity germanium detectors that cover an energy range of 20 keV–8 MeV with an energy resolution of 2–8 keV FWHM. We describe the methods used for the determination of the effects of radiation damage on the SPI detectors. Degradation rate and recovery by annealing are quantified. Using instrumental background lines due to radioisotopes from natural decay chains and from cosmic ray interactions, we found that the variations of detectors efficiency are low. Finally, the impact of the detector degradation on the energy calibration has been investigated.
Keywords
INTEGRAL , SPI , Radiation damage , Germanium detectors , Energy resolution
Journal title
Astroparticle Physics
Record number
2026983
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