Mainz 2012 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 41: Instrumentation

HK 41.3: Vortrag

Donnerstag, 22. März 2012, 17:30–17:45, P 2

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

The CBM experiment will explore the phase diagram of nuclear matter at high net baryon densities and moderate temperatures. This will be done in collisions of heavy-ion beams of energies up to 35A GeV with fixed nuclear targets. The CBM experiment will comprise several detector systems for charged particle tracking, micro-vertex determination, particle identification and calorimetry. The CBM Silicon Tracking System is required to cope with up to 1000 charged particles per central collision, to measure their momenta with 1% resolution and to stand 10¹⁴cm⁻² neutron equivalent dose. A demonstrator setup consisting of three tracking stations has been successfully tested on a 2.4 GeV/c proton beam. Each station is based on a double-sided silicon microstrip detector with 256 strips per side and 50 µm pitch. Self-triggering front-end electronics based on the n-XYTER chip is used for their readout. Straight-line tracks were reconstructed and the position resolution as well as detection efficiency determined. Systematic amplitude response studies of neutron-irradiated detectors were performed, including charge collection at various beam incidence angles and bias voltages. Supported by EU-FP7 HadronPhysics3, HICforFAIR and HGS-HIRe for FAIR.