Frankfurt 2014 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 34: Instrumentierung

HK 34.5: Talk

Wednesday, March 19, 2014, 18:00–18:15, HZ 8

Development of prototype CO₂ cooling system for the CBM Silicon Tracking System — •Evgeny Lavrik for the CBM collaboration — Physikalisches Institut der Universität Tübingen, Tübingen, Deutschland

The CBM experiment aims to study the properties of nuclear matter at high net-baryon densities. The 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 front-end electronic boards (FEBs). 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 2 m³ 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.

In our study we built an open cooling system to determine the two-phase CO₂ cooling parameters. Furthermore we designed and built custom heat exchangers adapted to the STS geometry and measured their cooling efficiency. We will present preliminary results of our ongoing work.

Supported by: BMBF and grant 05P12VTFCE