Bonn 2010 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 57: Instrumentierung XI

HK 57.8: Talk

Thursday, March 18, 2010, 18:30–18:45, HG VIII

Performance studies of the CBM Silicon Tracking System — •Anna Kotynia — GSI Darmstadt

One of the most challenging fields of modern high-energy physics is exploration of the phase diagram of strongly interacting matter. In order to study the dynamics of phase diagram at high net baryon densities, the CBM experiment will be performed with high-energy nucleus-nucleus collisions. Efficient charged particle tracking and high momentum resolution is one of the central performance requirements for the CBM Silicon Tracking System (STS). The aim of ongoing layout studies is to design a highly granular and low mass detector system that can track the 1000 charged particles that are typically generated in Au+Au collisions at 25 GeV/u projectile energy. A low mass detector is required to achieve a momentum resolution down to 1%. The STS layout comprises eight detector stations fully based on micro-strip detectors. The stations have a ladder structure and are build of 300 µm thick double-sided silicon micro-strip sensors with horizontal size of 6 cm and a strip pitch of 60 µm. The strip length was matched to a maximum occupancy of less than 5% and results in a vertical size of one sensor from 2 to 18 cm.

We will present the concept of STS geometry, tools used for simulation of realistic detector responce together with discussion about results of such simulations.

*Supported by EU-FP7 HadronPhysics2.