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CO2 cooling for particle detectors: experiences from the CMS and ATLAS detector systems at the LHC, and prospects for future upgrades.
Number: pap. n. 788
Author(s) : BORTOLIN C., CRESPO-LOPEZ O., DAGUIN J., et al.
Summary
CO2 cooling is the main candidate technology for the thermal control of the new generation semi-conductor particle detectors of the Large Hadron Collider (LHC) experiments at CERN. Two new CO2 cooling systems have recently been constructed for the ATLAS and CMS experiments. Both systems will cool the innermost detector layers; the ATLAS IBL system has a cooling capacity of 2.5 kW at -40°C and the CMS Pixel system has a capacity of 15kW at -25°C. Future upgrades of these experiments foresee the full replacement of the tracking detectors around 2024. These new, very large detectors – each about 200 m2 of semi-conductor sensors – will also be cooled with CO2. Studies to scale up the current design concepts and technologies to cooling powers of about 150 kW have started. This paper describes the CO2 cooling activities at CERN, profiting of the know-how gained during the design, construction and commissioning of the ATLAS IBL and CMS Upgrade Pixel cooling systems. Experiences of special adopted solutions will be discussed such as vacuum insulated triple coaxial transfer lines, redundancy solutions, hydraulic components, system monitoring and control approach and evaporator line fluid distribution. A prospect of the future will be given describing the needs for the development of the large systems as well as the development of mobile test equipment such as laboratory units, which are needed for the detector prototyping phases at many laboratories around the world.
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Details
- Original title: CO2 cooling for particle detectors: experiences from the CMS and ATLAS detector systems at the LHC, and prospects for future upgrades.
- Record ID : 30015456
- Languages: English
- Source: Proceedings of the 24th IIR International Congress of Refrigeration: Yokohama, Japan, August 16-22, 2015.
- Publication date: 2015/08/16
- DOI: http://dx.doi.org/10.18462/iir.icr.2015.0788
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Indexing
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Themes:
CO2;
Large-scale cryogenic applications - Keywords: Semiconductor; Cooling; R744; Particle; Detector; CO2; Accelerator
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