• G. Burt, R.G. Carter, A.C. Dexter, B.D.S. Hall
  Cockcroft Institute, Lancaster University, Lancaster
• P. Goudket
  STFC/DL/ASTeC, Daresbury, Warrington, Cheshire
• J.D.A. Smith
  Cockcroft Institute, Warrington, Cheshire

Multipactor can be a limiting factor in the design on many SRF cavities, however this is often a difficult phenomena to numerically model. In order to study the reliability of various codes we have undertaken to study the simulation of multipactor in rectangular waveguides and to compare this to experimental results obtained in previous work. In this paper we present the simulation results using CST-Particle Studio.

• P. Goudket, C.D. Beard, R.K. Buckley, B.D. Fell, J.-L. Fernandez-Hernando, P.A. McIntosh, S.M. Pattalwar
  STFC/DL/ASTeC, Daresbury, Warrington, Cheshire
• P.K. Ambattu, G. Burt, A.C. Dexter, B.D.S. Hall, M.I. Tahir
  Cockcroft Institute, Lancaster University, Lancaster

A superconducting RF vertical test facility (VTF) has been constructed at Daresbury Laboratory to eneable the commisioning of a ILC Crab Cavity LLRF Control System. Two Single Cell 3.9 GHz dipole mode cavities are tested simulataneously to enable the evaluation of the LLRF control system. Carefull tuning of the cavities for frequency and external Q to enable a low noise oscillator to be utilised. Several tests have been performed throughout the past 12 months, each test enabling a much improved system performance. The system is described, and the latest performance of the system is presented.