Darmstadt 2016 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 45: Postersession

HK 45.20: Poster

Mittwoch, 16. März 2016, 18:30–20:30, S1/05 22-24

Bi-Phase CO₂ cooling of the CBM STS detector — •Evgeny Lavrik for the CBM collaboration — Physikalisches Institut der Universität Tübingen, Deutschland

The Compressed Baryonic Matter (CBM) experiment aims to study the properties of nuclear matter at high net-baryon densities. The Silicon Tracking System (STS) is the key detector to reconstruct charged particle tracks created in heavy-ion interactions. The foreseen interaction rate of up to 10 MHz requires radiation hard detectors as well as efficient cooling of the silicon sensors. To avoid thermal runaway the system must be kept at -5^∘ C or below all the time. This is rather challenging because the overall thermal load in the  2m³ STS enclosure is up to 40 kW.

Because of these requirements liquid CO₂ is used as a cooling agent as it is superior in terms of volumetric heat transfer coefficient compared to other agents. This contribution shows the thermal simulations and measurement results of the STS front-end electronic boxes as well as an overview of 1kW TRACI-XL cooling plant developed at GSI and its use to perform thermal measurements of a fully heat loaded STS quarter station.

Work supported by BMBF under grant 05P12VTFCE.