• S. Peggs, M. Eshraqi, H. Hahn, A. Jansson, M. Lindroos, A. Ponton, K. Rathsman, C.G. Trahern
  ESS, Lund
• S. Bousson
  IPN, Orsay
• R. Calaga
  BNL, Upton, Long Island, New York
• H. Danared
  MSL, Stockholm
• G. Devanz, R.D. Duperrier
  CEA, Gif-sur-Yvette
• J. Eguia
  Fundación TEKNIKER, Eibar (Gipuzkoa)
• S. Gammino
  INFN/LNS, Catania
• S.P. Møller
  ISA, Aarhus
• C. Oyon
  SPRI, Bilbao
• R.J.M.Y. Ruber
  Uppsala University, Uppsala
• T. Satogata
  JLAB, Newport News, Virginia

Following selection of Lund as the site for the long-pulse ESS (European Spallation Source), a team of accelerator and target experts has been working on an update of the 2003 ESS linac design. Improvements to the 2003 design will be summarised, and the latest designs for the linac will be presented.

Slides

• F.B. Bouly, J.-L. Biarrotte, S. Bousson, C. Commeaux, C. Joly, J. Lesrel
  IPN, Orsay
• A. Bosotti, P.M. Michelato, R. Paparella, P. Pierini, D. Sertore
  INFN/LASA, Segrate (MI)

Accelerator Driven systems (ADS) are being considered for their potential use in the transmutation of nuclear waste. Because of the induced thermal stress to the subcritical core, the high-power proton LINAC will have to fulfill stringent reliability requirements and to minimize the number of unwanted beam trips per operation cycle. It is forseen to build an ADS demonstrator (MYRRHA) in Mol (Belgium). Such a device will be piloted by a 600 MeV / 4mA superconducting linac. IPN Orsay and INFN Milano are in charge of the realisation and tests of a prototypical cryomodule for the high energy section of the accelerator, equipped with a 5-cell superconducting cavity. Developed at INFN, this RF cryogenic accelerating device is tested for the first time at IPN. We will describe the status of the R&D activities on this device. The first low power tests of the 5-cell superconducting cavity in its prototypical cryomodule will be reviewed. Those tests aim to evaluate the cavity performances after installation in the module (16MV/m in vertical test) but also to measure the tuning systems behaviors in view of reliability considerations for 'fast fault-recovery scenarios'.