• 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

• S.M. Pattalwar, R. Bate, P.A. McIntosh
  STFC/DL/ASTeC, Daresbury, Warrington, Cheshire
• G. Cox, A. Oates
  STFC/DL, Daresbury, Warrington, Cheshire

ALICE is a prototype ERL accelerator that is being developed at STFC Daresbury Laboratory, UK. Recently it has successfully demonstrated the energy recovery technique by accelerating an electron beam to more than 30 MeV. A new superconducting LINAC cryomodule is being developed for the operation in CW mode with high average beam current. ALICE will be used as a test bed for this new cryomodule, which will utilise cold helium gas to cool the radiation shield, HOM absorbers and the thermal intercepts for the high power RF input couplers as opposed to liquid nitrogen. The additional cooling power required at 80 K and 5 K will be provided by COOL-IT (a system for cooling to intermediate temperatures). All these modifications would require new instrumentation for diagnostics and control of the additional cryogenic processes, which will be integrated with the existing Linde cryogenic control system for ALICE. In this paper we present an overview of the additional instrumentation requirement with associated integration scheme.

Poster

• 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.