• I.R. Bailey, J.A. Clarke, D.J. Scott
  Cockcroft Institute, Warrington, Cheshire
• I.R. Bailey
  Lancaster University, Lancaster
• C.G. Brown, J. Gronberg, L.B. Hagler, W.T. Piggott
  LLNL, Livermore, California
• L.J. Jenner
  Imperial College of Science and Technology, Department of Physics, London
• L. Zang
  The University of Liverpool, Liverpool

The efficiency of future positron sources for the next generation of high-energy particle colliders (e.g. ILC, CLIC, LHeC) can be improved if the positron-production target is immersed in the magnetic field of adjacent capture optics. If the target is also rotating due to heat deposition considerations then eddy currents may be induced and lead to additional heating and stresses. In this paper we present data from a rotating target wheel prototype for the baseline ILC positron source. The wheel has been operated at revolution rates up to 1800rpm in fields of the order of 1 Tesla. Comparisons are made between torque data obtained from a transducer on the target drive shaft and the results of finite-element simulations. Rotordynamics issues are presented and future experiments on other aspects of the positron source target station are considered.

• Y.M. Saveliev, R. Bate, R.K. Buckley, S.R. Buckley, J.A. Clarke, P.A. Corlett, D.J. Dunning, A.R. Goulden, S.F. Hill, F. Jackson, S.P. Jamison, J.K. Jones, L.B. Jones, S. Leonard, P.A. McIntosh, J.W. McKenzie, K.J. Middleman, B.L. Militsyn, A.J. Moss, B.D. Muratori, J.F. Orrett, S.M. Pattalwar, P.J. Phillips, D.J. Scott, E.A. Seddon, B.J.A. Shepherd, S.L. Smith, N. Thompson, A.E. Wheelhouse, P.H. Williams
  STFC/DL/ASTeC, Daresbury, Warrington, Cheshire
• P. Harrison, D.J. Holder, G.M. Holder, A.L. Schofield, P. Weightman, R.L. Williams
  The University of Liverpool, Liverpool
• D. Laundy
  STFC/DL, Daresbury, Warrington, Cheshire
• T. Powers
  JLAB, Newport News, Virginia
• G. Priebe, M. Surman
  STFC/DL/SRD, Daresbury, Warrington, Cheshire

Progress made in ALICE (Accelerators and Lasers In Combined Experiments) commissioning and a summary of the latest experimental results are presented in this paper. After an extensive work on beam loading effects in SC RF linac (booster) and linac cavities conditioning, ALICE can now operate in full energy recovery mode at the bunch charge of 40pC, the beam energy of 30MeV and train lengths of up to 100us. This improved operation of the machine resulted in generation of coherently enhanced broadband THz radiation with the energy of several tens of uJ per pulse and in successful demonstration of the Compton Backscattering x-ray source experiment. The next steps in the ALICE scientific programme are commissioning of the IR FEL and start of the research on the first non-scaling FFAG accelerator EMMA. Results from both projects will be also reported.

• S. Gerstl, T. Baumbach, S. Casalbuoni, A.W. Grau, M. Hagelstein, D. Saez de Jauregui
  Karlsruhe Institute of Technology (KIT), Karlsruhe
• V. Baglin
  CERN, Geneva
• C. Boffo, G. Sikler
  BNG, Würzburg
• T.W. Bradshaw
  STFC/RAL, Chilton, Didcot, Oxon
• R. Cimino, M. Commisso, B. Spataro
  INFN/LNF, Frascati (Roma)
• J.A. Clarke, D.J. Scott
  STFC/DL/ASTeC, Daresbury, Warrington, Cheshire
• M.P. Cox, J.C. Schouten
  Diamond, Oxfordshire
• R.M. Jones, I.R.R. Shinton
  UMAN, Manchester
• A. Mostacci
  Rome University La Sapienza, Roma
• E.J. Wallén
  MAX-lab, Lund
• R. Weigel
  Max-Planck Institute for Metal Research, Stuttgart

One of the still open issues for the development of superconducting insertion devices is the understanding of the beam heat load. With the aim of measuring the beam heat load to a cold bore and the hope to gain a deeper understanding in the beam heat load mechanisms, a cold vacuum chamber for diagnostics is under construction. The following diagnostics will be implemented: i) retarding field analyzers to measure the electron flux, ii) temperature sensors to measure the total heat load, iii) pressure gauges, iv) and mass spectrometers to measure the gas content. The inner vacuum chamber will be removable in order to test different geometries and materials. This will allow the installation of the cryostat in different synchrotron light sources. COLDDIAG will be built to fit in a short straight section at ANKA. A first installation at the synchrotron light source DIAMOND is under discussion. Here we describe the technical design report of this device and the planned measurements with beam.