München 2019 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 45: Instrumentation X and Applications

HK 45.5: Vortrag

Mittwoch, 20. März 2019, 17:45–18:00, HS 12

Performance simulations of the Silicon Tracking System of the CBM Experiment at FAIR — •Evgeny Lavrik for the CBM collaboration — Facility for Antiproton and Ion Research, Germany

The Compressed Baryonic Matter (CBM) experiment at the future Facility for Antiproton and Ion Research (FAIR) aims to study the properties of nuclear matter at high net-baryon densities and moderate temperatures.

The Silicon Tracking System (STS) is the key detector to reconstruct with a high efficiency up to 1000 charged particle trajectories created in heavy-ion collisions at interaction rates of up to 10 MHz. It will determine the momentum of the particles with a momentum resolution Δp/p ≈ 1-2% which requires low detector material budget of 0.3-1% X₀ per detection layer. The detector comprise eight layers of double-sided silicon micro-strip sensors and will be placed inside the 1 Tm superconducting magnet.

This contribution describes the simulated analog and digital response of the STS and its performance with regard to different geometries, sensor layouts and varied sensor thicknesses. Key metrics such as track and primary vertex reconstruction efficiencies, momentum resolution will be presented. In addition the effect of delta-electrons originating from beam-target interactions on the detector performance and read-out data rates will be shown.