Overview of the Silicon Tracking System for the CBM experiment

The Compressed Baryonic Matter (CBM) experiment will explore the QCD phase diagram in the region of high net baryonic densities and moderate temperatures. CBM will start it's physics program at the SIS-100 and later at the SIS-300 synchrothrons which will deliver beams for heavy ion collisions at energies up to 45 AGeV with hit rates up to 10 MHz.The Silicon Tracking System (STS) is the core tracking detector of the experiment. It will be used for the reconstruction of the tracks of charged particles and determination of their momenta. For this task eight tracking stations constructed with double-sided sililconmicro-strip sensors will be accomodated downstream the target inside the superconducting magnet. The required momentum resolution for particles with momenta above 1 GeV/c is of the order of Δp/p = 1%. To aim this, the material budget should be reduced to the level of 1% X₀. The STS will provide track reconstruction efficiency for fast primary tracks on the level of 95%and higher. In this paper, the detector concept is summarized along with the detector components and simulation of the system's performance. Also, the quality assurance tests of the silicon sensors in which the author is involved in, are presented.