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Hansen, J.

Paper Title Page
TUP017 Design of the Tail Clipper Collimator for CTF3 425
 
  • R. Chamizo, H.-H. Braun, N.C. Chritin, D. Grenier, J. Hansen, Y. Kadi, L. Massidda, Th. Otto, R. Rocca, R. Zennaro
    CERN, Geneva
  
 

The CERN CLIC test facility (CTF3) aims at assessing the feasibility of the future multi-TeV Compact Linear Collider (CLIC). The CTF3 Tail Clipper Collimator (TCC) will serve to adjust the bunch train length of the beam extracted from the combiner ring, in combination with a fast kicker magnet. In addition, the TCC will operate, when required, as an internal beam dump. The challenge of the TCC design is to meet the requirements of both collimator and dump operational modes for a low energy e- beam (100-300 MeV) of 35 A peak intensity. The TCC collimator will be installed at the end of 2008 in the TL2 transfer line of CTF3. This paper describes the final design of the TCC and the main issues related to its integration in the line.

  
THP120 Concept Design Studies of the REX-ISOLDE Cryomodules at CERN 1081
 
  • V. Parma, S. Calatroni, N. Delruelle, J. Hansen, C. Maglioni, M. Modena, M. Pasini, T. Trilhe
    CERN, Geneva
  • S.M. Pattalwar
    STFC/DL/ASTeC, Daresbury, Warrington, Cheshire
  
 

The High Intensity and Energy (HIE) proposal plans a major upgrade of the existing ISOLDE and REX-ISOLDE facilities at CERN, with the objective of substantially increasing the energy and the intensity of the delivered radioactive ion beams. In the frame of this upgrade activity, a superconducting linac, based on Nb sputtered Quarter Wave Resonators (QWRs) is proposed to be installed downstream of the present normal conducting machine. The present design of the accelerator lattice features housing of five high-beta cavities (β=10.6%) and a superconducting solenoid in a common cryomodule. In most of the existing low-energy heavy-ion installations worldwide, insulation and beam vacuum are in common, with the risk of cavity surface contamination in case of accidental leak to the cryostat vessel. Following a concept study, we report in this paper on three design options, namely cryomodules with common vacuum, with separate or with hybrid vacuum systems (the latter having a low conductance between insulation and beam vacuum) and compare them in terms of technical complexity, performance, reliability and maintainability.