|Understanding and modeling glitch effects in ISOCAM and other future space telescopes|
|A.J. Claret, K. Okumura|
One of the main limitations to the sensitivity of photodetector operated in space comes from responsivity variations and glitches caused by the impacts of charged particles. An international glitch working group (GWG) was created in order to centralize information about these phenomena and prepare future space experiments. Results about the infrared camera ISOCAM on-board the Infrared Space Observatory (ISO) are presented here: - The predicted glitch rate has been analytically evaluated and compared to in-flight measurements. - The study of temporal and spatial properties of glitches has led to a classification into 3 distinct families. These families are related to the linear energy transfer (LET) of charged particles interacting with the detectors. - Removal methods of glitch effects are briefly addressed. - Monte-Carlo simulations of radiation effects have been made. Glitch rates, spatial and energetic properties of glitches have been computed. Monte-Carlo results are compared with measured values. - Perspectives and current studies for HERSCHEL are discussed.