Particle effects on the ISGRI Instrument On-board the INTEGRAL Satellite

Author

Claret, A. ; Limousin, O. ; Lugiez, F. ; Laurent, P. ; Renaud, M.

Author_Institution

CEA, Centre d´´Etudes Nucleaires de Saclay, Gif-sur-Yvette, France

Volume

51

Issue

6

fYear

2004

Firstpage

3413

Lastpage

3419

Abstract

The INTEGRAL satellite was launched on October 17, 2002. All on-board instruments are operating successfully. In this paper, we focus on radiation effects on the Cadmium Telluride camera ISGRI. The spectral response of the camera is affected by cosmic particles depositing huge amount of energy, greater than the high threshold of the electronics. Our study raises the contribution of cosmic ray protons. Solutions are proposed to limit the degradation of spectral response of large pixel gamma cameras operating in space.

Keywords

astronomical instruments; astronomical observatories; cosmic ray apparatus; cosmic ray protons; gamma-ray sources (astronomical); position sensitive particle detectors; proton effects; CdTe detector; INTEGRAL satellite; ISGRI cadmium telluride camera; cosmic ray protons; electronics; energy deposition; gamma-ray observatory; gamma-ray sources; large pixel gamma cameras; on-board instruments; particle effects; radiation effects; space application; spectral response; Cadmium compounds; Cameras; Degradation; Gamma ray detection; Gamma ray detectors; Instruments; Protons; Pulse measurements; Satellites; Telescopes;

fLanguage

English

Journal_Title

Nuclear Science, IEEE Transactions on

Publisher

ieee

ISSN

0018-9499

Type

jour

DOI

10.1109/TNS.2004.839158

Filename

1369504