Author: Levinsen, Y.I.
Paper Title Page
TUPRO018 Prospects for the LHC Optics Measurements and Corrections at Higher Energy 1046
 
  • R. Tomás, T. Bach, J.M. Coello de Portugal, V. Kain, M. Kuhn, A. Langner, Y.I. Levinsen, K.S.B. Li, E.H. Maclean, N. Magnin, V. Maier, M. McAteer, T. Persson, P.K. Skowroński, R. Westenberger
    CERN, Geneva, Switzerland
  • E.H. Maclean
    JAI, Oxford, United Kingdom
  • S.M. White
    BNL, Upton, Long Island, New York, USA
 
  LHC will resume operation in 2015 at 6.5 TeV. The higher energy allows for smaller IP beta functions, further enhancing the optics errors in the triplet quadrupoles. Moreover the uncertainty in the calibration of some quadrupoles will slightly increase due to saturation effects. The complete magnetic cycle of the LHC will take longer due to the higher energy and extended squeeze sequence. All these issues require more precise and more efficient optics measurements and corrections to guarantee the same optics quality level as in 2012 when a 7% peak beta-beating was achieved. This paper summarizes the on-going efforts for achieving faster and more accurate optics measurements and corrections.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-TUPRO018  
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THPRI012 Tuning of the Compact Linear Collider Beam Delivery System 3788
 
  • Y.I. Levinsen, G. Giambelli, A. Latina, R. Tomás
    CERN, Geneva, Switzerland
  • H. Garcia
    UPC, Barcelona, Spain
  • J. Snuverink
    JAI, Egham, Surrey, United Kingdom
 
  Tuning the CLIC Beam Delivery System (BDS), and in particular the final focus, is a challenging task. In simulations without misalignments, the goal is to reach 120~\% of the nominal luminosity target, in order to allow for 10~\% loss due to static imperfections, and another 10~\% loss from dynamic imperfections. Various approaches have been considered to correct the magnet misalignments, including 1-1 correction, dispersion free steering (DFS), and several minimization methods utilizing multipole movers. In this paper we report on the recent advancements towards a feasible tuning approach that reach the required luminosity target in a reasonable time frame.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPRI012  
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