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Tecker, F.

Paper Title Page
THPMN058 Beam Dynamics Studies in the CLIC Injector Linac 2838
  • A. Ferrari
    UU/ISV, Uppsala
  • A. Latina, L. Rinolfi, F. Tecker
    CERN, Geneva
  The CLIC Injector Linac has to accelerate both electron and positron main beams from 200 MeV up to 2.42 GeV prior to their injection into the pre-damping rings. Its 26 accelerating structures operate at 1.875 GHz, with a loaded gradient of 17 MV/m. A FODO lattice that wraps the accelerating structures at the beginning of the linac, followed by a succession of triplet lattices between the accelerating structures, is proposed. The large transverse emittance (9200 mm.mrad), bunch length (5 mm) and energy spread (7 MeV) of the positron beam set constraints on the linac in order to reach acceptable characteristics at 2.42 GeV for the injection into the pre-damping ring. The use of a bunch compressor at the entrance of the linac is an option in order to achieve good performance in both the longitudinal and transverse phase spaces. Tracking studies of both electron and positron beams in the linac have been performed and are presented.  
THPMN063 CTF3 Combiner Ring Commissioning 2850
  • F. Tecker, R. Corsini, S. Doebert, P. K. Skowronski, P. Urschutz
    CERN, Geneva
  • C. Biscari, A. Ghigo
    INFN/LNF, Frascati (Roma)
  • E. Bressi
    CNAO Foundation, Milan
  • A. Ferrari
    UU/ISV, Uppsala
  CLIC Test Facility 3 (CTF3) has the objective to demonstrate the remaining feasibility issues of the CLIC two-beam technology for a future multi-TeV linear collider. One key issue is the efficient generation of a very high current 'drive beam' that serves as the power source for the acceleration of the main beam to high energy. This large current beam is produced by interleaving bunches in a combiner ring using transverse deflecting RF cavities. The 84 m long CTF3 combiner ring and the connecting transfer line have been recently installed and put into operation. The latest commissioning results will be presented.  
FRPMS045 Non-Destructive Single Shot Bunch Length Measurements for the CLIC Test Facility 3 4069
  • A. E. Dabrowski, M. Velasco
    NU, Evanston
  • H.-H. Braun, R. Corsini, S. Doebert, T. Lefevre, F. Tecker, P. Urschutz
    CERN, Geneva
  Funding: DOE

A non-destructive bunch length detector has been installed in the CLIC Test Facility (CTF3). Using a series of down-converting mixing stages and filters, the detector analyzes the power spectrum of the electromagnetic field picked-up by a single waveguide. This detector evolved from an earlier system which was regularly used for bunch length measurements in CTF2. Major improvements are increase of frequency reach from 90 GHz to 170 GHz, allowing for sub-pico second sensitivity, and single shot measurement capability using FFT analysis from large bandwidth waveform digitisers. The results of the commissioning of the detector in 2006 are presented.

FROBC01 30 GHz High-Gradient Accelerating Structure Test Results 3818
  • J. A. Rodriguez, G. Arnau-Izquierdo, R. Corsini, S. Doebert, R. Fandos, A. Grudiev, I. Syratchev, M. Taborelli, F. Tecker, P. Urschutz, W. Wuensch
    CERN, Geneva
  • H. Aksakal, Z. Nergiz
    Ankara University, Faculty of Sciences, Tandogan/Ankara
  • M. Johnson
    UU/ISV, Uppsala
  • O. M. Mete
    Ankara University, Faculty of Engineering, Tandogan, Ankara
  The CLIC study is high power testing accelerating structures in a number of different materials and accelerating structure designs to understand the physics of breakdown, determine the appropriate scaling of performance and in particular to find ways to increase achievable accelerating gradient. The most recent 30 GHz structures which have been tested include damped structures in copper, molybdenum, titanium and aluminum. The results from these new structures are presented and compared to previous ones to determine dependencies of quantities such as achievable accelerating gradient, pulse length, power flow, conditioning rate and breakdown rate.  
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