Speaker
Dr
Anton Lymanets
(GSI, Darmstadt)
Description
The central detector of the CBM experiment at FAIR is a Silicon Tracking System (STS) consisting of 8 tracking stations based on double-sided silicon microstrip sensors. It will deliver high-rate streamed data that is analyzed on a computing farm.
The functional building block is a detector module consisting of a sensor, microcables and a front-end electronics board. The double-sided microstrip sensors have a strip pitch of 58 $\mu$m , are AC-coupled and oriented under 7.5$^\circ$. Double metallization is employed to interconnect corner strips. Ultra-thin cables with up to 60 cm length and pitch matching that of the sensor strips transfer the analog signals to the readout electronics at the periphery of the stations. The readout ASIC is the STS-XYTER with self-triggering architecture that will deliver time and amplitude information.
The detector will be operating within a thermal enclosure of 2 m$^3$ at below $-5^\circ$C so that its silicon sensors remain operational up to a particle fluence of 10$^{14}$ 1-MeV n$_{eq}$/cm$^2$. The electronics inside, about 16 thousand ASICs with more than 2 million readout channels, will dissipate about 40 kW power. Bi-phase CO$_2$ evaporative cooling approach has been chosen.
In this contribution, the development status of components, system integration and the project time line for their production will be discussed.
Primary author
Dr
Anton Lymanets
(GSI, Darmstadt)
