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Burkhardt, H.

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TUPAN088 Beam Scraping for LHC Injection 1580
  • H. Burkhardt, G. Arduini, S. Bart Pedersen, C. Fischer, JJ. G. Gras, A. Koschik, D. K. Kramer, S. Redaelli
    CERN, Geneva
  Operation of the LHC will require injection of very high intensity beams from the SPS to the LHC. Fast scrapers have been installed and will be used in the SPS to detect and remove any existing halo before beams are extracted, to minimize the probability for quenching of super-conducting magnets at injection in the LHC. We briefly review the functionality of the scraper system and report about measurements that have recently been performed in the SPS on halo scraping and re-population of tails.  
TUPAN102 Numerical Study of the Very Forward Background from the Proton-Proton Collisions in the Experimental Insertions of the LHC 1619
  • V. Talanov, H. Burkhardt, D. Macina, E. Tsesmelis
    CERN, Geneva
  The results from the numerical DPMJET-FLUKA simulation of the background in the experimental IR's of the LHC are presented. DPMJET3 is used for the generation and analysis of the products from the p-p collision leaving the interaction point in the very forward region. A multi-particle transport code FLUKA is used for the simulation of the resulting secondary cascades in the structure of the LHC long straight sections. The background formation is estimated and analyzed in the LSS's at the locations of the TAN absorber, Roman Pot stations and Beam Loss Monitors, for the purposes of the machine protection and planning of the operation of the detectors.  
WEOCC03 Halo Estimates and Simulations for Linear Colliders 2041
  • H. Burkhardt, A. Latina, L. Neukermans, D. Schulte
    CERN, Geneva
  • I. V. Agapov, G. A. Blair
    Royal Holloway, University of London, Surrey
  • F. Jackson
    STFC/DL/ASTeC, Daresbury, Warrington, Cheshire
  Funding: This work is supported by the Commission of the European Communities under the 6th Framework Programme "Structuring the European Research Area", contract number RIDS-011899.

Halo simulations and estimates are important for the design of future linear accelerators. We present simulations performed for the ILC and CLIC and compare these with semi-analytical estimates and other simulations.

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FRPMN065 Fast Vertical Single-Bunch Instability at Injection in the CERN SPS - An Update 4162
  • G. Arduini, T. Bohl, H. Burkhardt, E. Metral, G. Rumolo
    CERN, Geneva
  • B. Salvant
    EPFL, Lausanne
  Following the first observation of a fast vertical instability for a single high-brightness bunch at injection in the SPS in 2003, a series of detailed measurements and simulations has been performed in order to assess the resulting potential intensity limitations for the SPS, as well as possible cures. During the 2006 run, the characteristics of this instability were studied further, extending the intensity range of the measurements, and comparing the experimental data with simulations that take into account the latest measurements of the transverse machine impedance. In this paper, we summarize the outcome of these studies and our understanding of the mechanisms leading to this instability. The corresponding intensity limitations were also determined.