20-27 July 2011
Alpes Congrès - Alpexpo
Europe/Paris timezone

The Silicon Strip Tracker of the Fermi Large Area Telescope

22 Jul 2011, 12:45
Lesdiguières (Alpes Congrès - Alpexpo)


Alpes Congrès - Alpexpo

Parallel session talk Detector R & D and data handling Detector R & D and Data Handling


Dr Johan Bregeon (INFN-Pisa)


The Large Area Telescope (LAT) is the main instrument onboard the Fermi Gamma-ray Space Telescope, an orbital observatory launched in low-Earth orbit on June 11 2008 to survey the high-energy gamma-ray sky. The LAT tracker/converter serves the twofold purpose of converting the incoming gamma-ray into an electron-positron pair and tracking the latter in order to measure the original photon direction. With its 73 square meters of single-sided silicon-strip detectors, read out by some 900,000 independent electronics channel, it is the largest solid-state tracker ever built for a space application. The tracker system operates on 160 W of conditioned power while achieving a single-plane hit efficiency in excess of 99% and a noise occupancy at the level of 1 channel per million. We describe the basic tracker design and the performance throughout the first three years of operation in orbit.

Primary authors

Dr Johan Bregeon (INFN-Pisa) Dr Luca Baldini (INFN-Pisa)

Presentation Materials