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Cooling Capacity Upgrade at LHC P4
The LHC sectors are cooled by eight similar helium refrigerators. P4 needs more cooling capacity due to the superconducting RF. This has not limited LHC so far but would be a bottleneck for the HL-LHC era. Following conceptual studies ranging from completely new cryogenic infrastructure to partial modifications, it was decided to upgrade the existing…
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First Tests of Full Remote Handling for VAX Modules
Today’s LHC environment is subject to different radiation types, particle types and energy ranges. In particular, at the machine-experiment regions the main sources of radiation come from beam collisions at experiments and beam interactions. The 10-fold increase of luminosity (collisions in the experiments) foreseen for HiLumi will increase the radiation levels, and innovative approaches need…
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Recent Progress in Warm Powering: Making Steps towards Unprecedented Precision and Expanded Modularity
During the last year, several advancements have been made in the Warm Powering; among them some important steps towards implementing expanded modularity and guaranteeing unprecedented precision. In the LHC, to date, only 1-Q (1-Quadrant) power converters (LHC main and individually powered quadrupole circuits, ATLAS toroid) have been conceived with modularity and feature N+1 redundancy whereas…