PoS - Proceedings of Science
Volume 419 - FAIR next generation scientists - 7th Edition Workshop (FAIRness2022) - Main session
CBM Silicon Tracking System integration: from module production to ladder assembly
S. Mehta*, K. Agarwal, U. Frankenfeld, J. Heuser, F. Nickels, H.R. Schmidt, C. Simons and R. Visinka
Full text: pdf
Published on: June 19, 2023
Abstract
The Silicon Tracking System (STS) is the core detector of the Compressed Baryonic Matter (CBM) experiment at the future FAIR facility. It is located inside of a 1 Tm dipole magnet to achieve a momentum resolution of 2% for charged particles. The functional building block of STS
is a module consisting of double-sided silicon micro-strip sensor connected via microcables to
front-end electronics located outside of the detector’s physics acceptance of 25°[1]. Self-triggering
read-out electronics based on the STS-XYTER ASIC is used, which is capable of acquiring data at
collision rates of upto 10 MHz. The system comprises of low-mass detector modules, distributed
on 8 tracking stations with a material budget of 1-2% X 0 per station. The stations are made
from mechanical half-units onto which ultra-light carbon fiber support structures, or ladders, are
mounted which hold the sensors. The positioning of modules after mounting them on the ladder
is expected to be in the order of 100 µm.
This contribution aims to provide an overview on the module assembly procedure and how
modules are integrated on to the ladders along with the challenges faced during the integration.
These techniques have been successfully demonstrated in the ongoing FAIR Phase-0 Programme
of mini-CBM, where 11 such modules were successfully installed. Additional assemblies have
also been made for various test setups.
DOI: https://doi.org/10.22323/1.419.0036
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