• G. Burt, P.K. Ambattu, A.C. Dexter
  Cockcroft Institute, Lancaster University, Lancaster
• R. Calaga
  BNL, Upton, Long Island, New York
• E. Montesinos
  CERN, Geneva

Multipactor is a limiting factor in many RF power couplers. The SPL coupler is proposed to have a conical matching section between the window and the coaxial section however this section must be checked for multipactor. Multipactor simulations of the coupler up to a few MW's of power were performed using a variety of different codes and the results were compared. Simulations were performed in the conical and straight coaxial sections.