• P.A. McIntosh, R. Bate, C.D. Beard, R.K. Buckley, S.R. Buckley, P.A. Corlett, A.R. Goulden, A.J. Moss, J.F. Orrett, S.M. Pattalwar, Y.M. Saveliev, R.J. Smith, S.L. Smith, A.E. Wheelhouse
  STFC/DL/ASTeC, Daresbury, Warrington, Cheshire

ALICE (Accelerators and Lasers in Combined Experiments) is a 35 MeV energy recovery linac based light source. ALICE is being developed as an experimental test-bed for a broad suite of science and technology activities that make use of electron acceleration and ultra-short pulse laser techniques. ALICE utilises two super-conducting radio frequency (SRF) cryomodules, each with two identical 9-cell, 1.3 GHz cavities that are powered by 5 inductive output tubes (IOTs) from 3 different commercial suppliers. The experience gained in both commissioning these systems and ultimately operating for energy recovery is presented. Developments for a new ERL cryomodule upgrade for ALICE are also described.

Slides

Talk

• 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.

• P.A. McIntosh, R. Bate, C.D. Beard, S.M. Pattalwar
  STFC/DL/ASTeC, Daresbury, Warrington, Cheshire
• S.A. Belomestnykh, E.P. Chojnacki, Z.A. Conway, G.H. Hoffstaetter, P. Quigley, V. Veshcherevich
  CLASSE, Ithaca, New York
• A. Büchner, F.G. Gabriel, P. Michel
  FZD, Dresden
• M.A. Cordwell, D.M. Dykes, J. Strachan
  STFC/DL, Daresbury, Warrington, Cheshire
• J.N. Corlett, D. Li, S.M. Lidia
  LBNL, Berkeley, California
• T. Kimura, T.I. Smith
  Stanford University, Stanford, Califormia
• S.R. Koscielniak, R.E. Laxdal
  TRIUMF, Vancouver
• M. Liepe, H. Padamsee, J. Sears, V.D. Shemelin
  Cornell University, Ithaca, New York
• D. Proch, J.K. Sekutowicz
  DESY, Hamburg

The collaborative development of an optimised cavity/cryomodule solution for application on ERL facilities has now progressed to final assembly and testing of the cavity string components and their subsequent cryomodule integration. This paper outlines the testing and verification processes for the various cryomodule sub-components and details the methodology utilised for final cavity string integration. The paper also highlights the modifications required to integrate this new cryomodule into the existing ALICE cryo-plant facility at Daresbury Laboratory.