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Darmstadt 2008 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 25: Instrumentation und Anwendungen I

HK 25.9: Vortrag

Dienstag, 11. März 2008, 13:15–13:30, 2C

Cryogenic silicon detectors for COMPASS — •Stefanie Grabmüller1, Anna-Maria Dinkelbach1,2, Jan Michael Friedrich1, Igor Konorov1, Bernhard Ketzer1, and Stephan Paul11TU München, Physik Department E18, 85748 Garching — 2Prüftechnik Alignment Systems, 85737 Ismaning

In the COMPASS experiment, double-sided silicon strip detectors perform high precision tracking in the beam telescope and, when required by the physics programme, also downstream of the target.

At very high particle fluxes, radiation damage deteriorates the performance of silicon detectors, particularly in the case of hadron beams. The COMPASS physics programme with hadron beams is scheduled to start in 2008, with total integrated fluxes in the order of 1014 particles per cm2 per year. Therefore the lifetime of new detectors will be extended significantly by cooling the silicon to a temperature of 130 K with liquid nitrogen.

The setup of cryogenic silicon detectors is presented, as well as the performance during a test in the COMPASS beam in 2007.

This work is supported by BMBF, Maier-Leibnitz-Labor München and Cluster of Excellence Exc153.

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