Heidelberg 2015 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 31: Instrumentation 11

HK 31.5: Vortrag

Dienstag, 24. März 2015, 18:00–18:15, M/HS2

Development of a CO₂ Cooling System for the CBM Silicon Tracking System — •Jorge Sanchez Rosado¹, Burak Degirmenciler¹, Johann Heuser¹, Anton Lymanets², Hans Rudolf Schmidt², and Christian Sturm¹ — ¹GSI Helmholtzzentrum für Schwerionenforschung GmbH — ²Eberhard Karls Universität Tübingen

The demanding requirements of current high-energy physics experiments curiously bring back the idea of using a well-known and present refrigerant in nature: CO₂. As an outcome of previous studies and effort made within the current upgrade programs of detectors like ATLAS or CMS, this refrigerant is the optimum solution. Due to its highest volumetric heat transfer coefficient, it fulfills the requirements in this kind of detectors such as reduction of mass budget and the use of smaller diameter for cooling pipes.

A two-phase (evaporative) CO₂ cooling system is taken as the first choice to extract the 42 kW dissipated by the electronics of the Silicon Tracking System, the central detector of the CBM experiment at FAIR that will be installed in the gap of the 1 T super-conducting dipole magnet in a confined volume of 2 m³. As a step towards the final design of this a cooling system, a 1 kW cooling unit called TRACI-XL was conceived at GSI in cooperation with CERN. This scaled prototype allows gaining insight into the behavior of the full system with valuable conclusions in terms of thermodynamics, process engineering and automation.