• A.F.D. Morgan, G. Rehm
  Diamond, Oxfordshire
• S.T. Boogert, N.Y. Joshi
  JAI, Egham, Surrey
• A. Lyapin
  UCL, London
• S. Molloy
  Royal Holloway, University of London, Surrey

This paper describes the design of a cavity BPM for use in single pass machines. The design was modelled using a number of different EM codes to allow cross comparison of the simulation results. Furthermore, in addition to existing designs, the geometry has been modified to introduce a frequency separation between the horizontal and vertical dipole signals, as well as a reduction of the sensitivity of the position monitor to the monopole sum signal. The next stage of this project will be the manufacture of a prototype for tests in the transfer path at Diamond Light Source.