Speaker
Description
During the CMS Phase-2 upgrade, the cooling system of the CMS Tracker will be enhanced to operate its subsystems at temperatures down to -35degC. The cooling medium - liquid CO2 - will be distributed via Detector Transfer Lines (DTLs), passing through PP1s (Patch Panel 1) and then through the Tracker Service Channels (TSCs) before reaching the detectors inside the Tracker.
As the space inside the TSC is very limited, its design must be carefully considered, as condensation of water on the outer surface of the service channel could cause damage to the system. During Phase-1, this issue was solved through on-site modifications, which provided system safety but in a non-optimized manner.
This poster presents the results of numerous thermal simulations of a new TSC design performed during Phase-2 preparations, as well as the results of thermal tests carried out on a 1:1 prototype. Different scenarios were evaluated to optimize the design and identify an effective method to maintain the outer surface temperature of the TSC above the dew point.