By Simon Barrière (CERN)

Within the framework of the HL-LHC Work Package 4 (Crab Cavities & RF), the series production of cryogenic lines is actively underway at CERN’s EN-MME main workshop. These stainless steel lines are designed to bring liquid helium into the crab cavity cryomodules, cooling the bulk niobium cavities down to cryogenic temperature (for nominal operation at 2 K).

This cooling is essential to unlock the superconducting properties necessary for sustaining the high-power electromagnetic fields within the cavities. After a year of manufacturing, involving a complex intertwining of diverse fabrication and inspection techniques, a complete batch of these cryogenic lines is now prepared for shipment to the Work Package 4 collaboration in Canada (TRIUMF, Vancouver), where they will be integrated into the first RFD-version cryomodule in the coming months.

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