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Braun, H.-H.

Paper Title Page
MOPAN023 Superconductive Damping Wigglers for the CLIC Project 200
 
  • R. Rossmanith, S. Casalbuoni, A. W. Grau, M. Hagelstein, B. K. Kostka
    FZK, Karlsruhe
  • T. Baumbach, A. Bernhard, A.-S. Muller, D. Wollmann
    University of Karlsruhe, Karlsruhe
  • H.-H. Braun, M. Korostelev, Y. Papaphilippou, F. Zimmermann
    CERN, Geneva
  • E. M. Mashkina, E. Steffens
    University of Erlangen-Nurnberg, Physikalisches Institut II, Erlangen
  
  The CLIC damping ring requires wigglers with both high on-axis fields and short periods. The present design foresees a superconductive wiggler with a period length of 5 cm, a peak on-axis field of 2.5 T and a full width aperture of 12 mm. In this paper we explore the performance improvements of the damping ring when these parameters are pushed to 2.7 T at a period length of 2 cm with the expense of a reduced aperture of 5 mm. A design for a prototype for testing the field quality of such a wiggler is presented in this paper and the possibility to test this wiggler with beam in the storage ring ANKA is described.  
TUPAN107 Beam Loss Response Measurements with an LHC Prototype Collimator in the SPS 1622
 
  • Th. Weiler, G. Arduini, R. W. Assmann, C. Bracco, H.-H. Braun, B. Dehning, P. Gander, E. B. Holzer, M. Jonker, R. Losito, A. Masi, L. Ponce, S. Redaelli, G. Robert-Demolaize, M. Sobczak, J. Wenninger
    CERN, Geneva
  
  Beam tests with an LHC prototype collimator were performed at the SPS in autumn 2006. Applying a new collimator control system many new beam measurements were performed. This contribution presents results on collimator-induced beam loss measurements and their applications to beam-based alignment of collimators and measurements of the beam size and position. Interesting features of the recorded beam loss signals are illustrated and possible impacts for LHC operation are discussed. The measured loss distributions around the full SPS ring are analyzed and compared with simulations.  
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.