Münster 2017 – scientific programme

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T: Fachverband Teilchenphysik

T 25: Streifendetektoren 1 (gemeinsam mit HK)

T 25.2: Group Report

Monday, March 27, 2017, 17:00–17:30, F 234

The Silicon Tracking System of the CBM Experiment at FAIR — •Olga Bertini for the CBM collaboration — GSI Darmstadt, Germany

The Compressed Baryonic Matter experiment will explore the phase diagram of strongly interacting matter in nucleus-nucleus collisions in the region of high net baryon densities using a number of rare probes and bulk observables. Its main component – the Silicon Tracking System (STS) – has to enable the reconstruction of up to 1000 charged particle trajectories per N-N collision at interaction rates of up to 10 MHz. The system design employs high-granularity sensors matching the non-uniform track density and fast self-triggering electronics needed for free streaming data acquisition system and online event selection. The required momentum resolution of Δ p/p∼1.5% dictates the need of a low-mass design with material budget of 0.3-1%X₀ per station. The eight tracking stations of the STS are located in the aperture of a dipole magnet with 1 T field, and will cover an active area of 4.2 m², corresponding to polar the polar angles between 2.5^∘ and 25^∘. The STS will comprise about 1000 detector modules consisting of double-sided silicon microstrip sensors, ultra-thin readout cables and front-end electronics that are mounted onto lightweight carbon fiber support structures. The assembly of the detector module components into full-scale prototypes and the engineering of the mechanical structure of the STS detector will be presented as well as progress with the final components, in particular sensors, readout cables and front-end electronics.