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Münster 2011 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 13: Instrumentierung II

HK 13.3: Vortrag

Montag, 21. März 2011, 17:15–17:30, HS1

Performance of the prototype silicon strip tracking detectors for the CBM experiment — •Iurii Sorokin — Goethe University Frankfurt — Kiev Institute for Nuclear Research

The CBM experiment aims at exploring the phase diagram of nuclear matter at high net baryon densities and moderate temperatures, including a clarification of the existance of Quark-Gluon Plasma and the corresponding phase transition. It’s a fixed-target experiment using heavy-ion beams with energies up to 35A GeV. The Silicon Tracking System is required to cope with up to 600 charged products per central collision, to measure their momenta with 1% resolution and to stand up to 1015 cm−2 neutron equivalent dose.

Two similar prototype detector stations based on double-sided n-type silicon strip sensors with 50 µm pitch and 256 strips per side have been built. Self-triggering front-end electronics based on the n-XYTER chip is used for their readout.

The amplitude response of the detector system has been measured in a 3 GeV/c proton beam and with a 241Am γ-source. Also the charge collection efficiency has been evaluated and the charge distribution between neigboring strips as a function of track position and sensor bias voltage, thus providing input for sensor simulations.

Supported by GSI, HIC for FAIR, EU FP7 Hadronphysics2.

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