A quarter wave design for crab crossing in the LHC

The aperture constraints of the LHC interaction region and the alternating crossing schemes at two collision points, calls for a superconducting (SC) deflecting cavity with very compact dimensions at low frequencies for the purpose of crab crossing. A new concept of using a superconducting quarter wave like design, ideally suited to address the LHC constraints at 400 MHz, is proposed. The optimized RF cavity design and associated advantages of using a quarter wave resonators are presented. Higher order modes and frequency tuning of the cavity are also presented