Abstract
The Silicon Tracking System (STS) is the central detector in the Compressed Baryonic Matter (CBM) experiment at FAIR. Operating in the 1Tm dipole magnetic field, the STS will enable pile-up free detection and momentum measurement of the charged particles originating from beam-target nuclear interactions at rates up to 10 MHz. The STS consists of 8 tracking stations based on double-sided silicon micro-strip sensors equipped with fast, self-triggering read-out electronics. With about two million read-out channels, the STS will deliver a high-rate stream of time-stamped data that is transferred to a computing farm for on-line event determination and analysis. The functional building block is a detector module consisting of a sensor, micro-cables and two front-end electronics boards. In this contribution, the development status of the STS components and the system integration is discussed and an outlook on the detector construction is given.
Highlights
The Compressed Baryonic Matter (CBM) experiment aims to explore of the phase diagram of strongly interacting matter at moderate temperatures and high net baryon densities
The read-out electronics is connected to the silicon micro-strip sensors via ultra-thin aluminium-polyimide multi-line cables [4]
The Silicon Tracking System (STS) system integration focuses on a detector that can be mounted in the gap of the dipole magnet and be extracted for maintenance
Summary
The Compressed Baryonic Matter (CBM) experiment aims to explore of the phase diagram of strongly interacting matter at moderate temperatures and high net baryon densities. It is planned as a part of the Facility for Antiproton and Ion Research (FAIR) complex in Darmstadt, Germany [1]. The comparison of the anticipated CBM performance with the existing and forthcoming experiments is shown, left Such a high interaction rate is needed for the observation of particles with relatively low production cross-section ( multi-strange hyperons, see Fig. 1, right), sub-threshold production, and precise studies of collective effects, such as particle flow fluctuations. An ultra-light, fast and precise tracking system is needed to fulfil the physics program of CBM [2, 4]
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