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Investigations of the LHC Emittance Blow-Up During the 2012 Proton Run
International Particle Accelerator Conference 2013 Proceedings: Shanghai, China
  • M. Kuhn, University of Hamburg
  • G. Arduini, CERN
  • P. Baudrenghien, CERN
  • J. Emery, CERN
  • A. Guerrero, CERN
  • W. Hofle, CERN
  • V. Kain, CERN
  • M. Lamont, CERN
  • T. Mastoridis, CERN
  • F. Roncarolo, CERN
  • M. Sapinski, CERN
  • M. Schaumann, CERN
  • R. Steinhagen, CERN
  • G. Trad, CERN
  • D. Valuch, CERN
Publication Date
5-12-2013
Abstract
About 30 % of the potential luminosity performance is lost through the different phases of the LHC cycle, mainly due to transverse emittance blow-up. Measuring the emittance growth is a difficult task with high intensity beams and changing energies. Improvements of the LHC transverse profile instrumentation helped to study various effects. A breakdown of the growth through the different phases of the LHC cycle is given as well as a comparison with the data from the LHC experiments for transverse beam size. In 2012 a number of possible sources and remedies have been studied. Among these are intra beam scattering, 50 Hz noise and the effect of the transverse damper gain. The results of the investigations are summarized in this paper. Requirements for transverse profile instrumentation for post LHC long shutdown operation to finally tackle the emittance growth are given as well.
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Citation Information
M. Kuhn, G. Arduini, P. Baudrenghien, J. Emery, et al.. "Investigations of the LHC Emittance Blow-Up During the 2012 Proton Run" International Particle Accelerator Conference 2013 Proceedings: Shanghai, China (2013)
Available at: http://works.bepress.com/tmastori/23/