Speaker
Description
At the end of the third “long shut down” of the LHC (LS3) the ATLAS and CMS experiments will start operating the largest silicon-based detectors ever built, featuring a cumulated power dissipation in the order of 800 kW and the requirement of keeping several hundreds of m2 of silicon surface at temperatures well below 0 °C. The thermal management of such detectors will be ensured by a cascade of a transcritical R744 refrigeration cycle coupled to pumped loops circulating pure CO2 in the detector evaporators. This environmentally sustainable approach is the outcome of a collaboration between the EP and the EN departments of CERN, and marks a solid step towards the abandon of synthetic refrigerants and the transition to natural fluids. The talk will highlight the major technical points connected to this development and the opportunities it opens towards the general adoption of a more environmentally-aware approach to detector refrigeration in the future.
