Bochum 2018 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 61: Instrumentation XVIII

HK 61.2: Talk

Friday, March 2, 2018, 14:30–14:45, HZO 90

Thermal Management of the CBM Silicon Tracking System — •Kshitij Agarwal for the CBM collaboration — Physikalisches Institut - Eberhard Karls Universität Tübingen, Tübingen, Germany

As the core detector of the CBM experiment, the Silicon Tracking System (STS) located in the dipole magnet provides track reconstruction & momentum determination of charged particles from beam-target interactions. Due to the expected irradiation damage, the sensors will dissipate some power and have to be kept at or below -5^∘C at all times by complete removal of the heat dissipated by the front-end electronics boards (∼40kW). The heat must be removed to avoid thermal runaway and reverse annealing of the irradiated silicon sensors. To achieve this, the STS will be operated in a thermal insulation box and will use bi-phase CO₂ cooling system for the FEE.

Given the space constraints for STS integration, a high-density feedthrough panel system for all services is needed while maintaining the thermal environment needed for detector operation. In this presentation, the assembly and thermal tests for HV-LV feedthrough panels will be shown. This is part of an effort towards building a cooling demonstrator for two STS half-stations to show that the CBM-STS cooling concept is viable. The respective future plan for its completion followed by the initial construction R&D will be presented.

This work is supported by GSI/FAIR.