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HK: Fachverband Physik der Hadronen und Kerne

HK 25: Instrumentation und Anwendungen I

HK 25.9: Talk

Tuesday, March 11, 2008, 13:15–13:30, 2C

Cryogenic silicon detectors for COMPASS — •Stefanie Grabmüller¹, Anna-Maria Dinkelbach^1,2, Jan Michael Friedrich¹, Igor Konorov¹, Bernhard Ketzer¹, and Stephan Paul¹ — ¹TU 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.