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Soby, L.     [Søby, L.]

Paper Title Page
MOPE087 Submicron Multi-bunch BPM for CLIC 1185
 
  • A. Lunin, N. Solyak, M. Wendt, V.P. Yakovlev
    Fermilab, Batavia
  • H. Schmickler, L. Søby
    CERN, Geneva
 
 

A common-mode free cavity BPM is currently under development at Fermilab within the ILC-CLIC collaboration. This monitor will be operated in a CLIC Main Linac multi-bunch regime, and needs to provide both, high spatial and time resolution. We present the design concept, numerical analysis, investigation on tolerances and error effects, as well as simulations on the signal response applying a multi-bunch stimulus.

 
MOPE058 Measuring the Bunch Frequency Multiplication at CTF3 1107
 
  • A.E. Dabrowski, S. Bettoni, E. Bravin, R. Corsini, S. Döbert, T. Lefèvre, A. Rabiller, P.K. Skowronski, L. Søby, F. Tecker
    CERN, Geneva
  • D. Egger
    EPFL, Lausanne
  • A. Ferrari
    Uppsala University, Uppsala
  • C.P. Welsch
    The University of Liverpool, Liverpool
 
 

The CTF3 facility is being built and commissioned by an international collaboration in order to test the feasibility of the proposed CLIC drive beam generation scheme. Central to this scheme is the use of RF deflectors to inject bunches into a Delay Loop and a Combiner Ring, in order to transform the initial bunch spacing of 1.5 GHz from the linac to a final bunch spacing of 12 GHz. The optimization procedure relies on several steps. The active length of each ring is carefully adjusted to within a few millimeters accuracy using a two‐period undulator. The transverse optics of the machine must be set-up in a way so as to ensure the beam isochronicity. Diagnostics based on optical streak cameras and RF power measurements have been designed to measure the longitudinal behaviour of the beam during the combination. This paper presents their performance and highlights recent measurements.