Double-quarter wave crab cavity ready for the final phase of string assembly and cryostating

18 December, 2023

The industrially produced double-quarter wave crab cavity installed on the cryogenic insert for an RF test at 2 Kelvin including all RF ancillaries produced at CERN (Image: Irene Garcia Obrero)

The first industrially produced superconducting double-quarter wave crab cavity for the HL-LHC was equipped with RF ancillaries produced at CERN and tested at 2 Kelvin in its final configuration. The fully dressed cavity reached 4.75 millon-volts surpassing well beyond its specification of 4.1 millon-volts. The cavity is now ready for the final phase of string assembly and cryostating foreseen in 2024.

The remarkable result underscores the strong collaboration between CERN and industry to overcome many challenges to master this complex and cutting-edge technology, a key component for HL-LHC and several future colliders. We are very happy and proud to share this success with our industrial partner, Research Instruments in Germany.