Author: Medina Medrano, L.E.
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TUPIK089 Studies on Luminous Region, Pile-up and Performance for HL-LHC Scenarios 1908
SUSPSIK002   use link to see paper's listing under its alternate paper code  
 
  • L.E. Medina Medrano, G. Arduini, R. Tomás
    CERN, Geneva, Switzerland
  • L.E. Medina Medrano
    UGTO, Leon, Mexico
  
  Funding: Research supported by the HL-LHC project and the Beam project (CONACYT, Mexico).
Studies on luminous region and pile-up density are of great interest for the experiments at the future High Luminosity LHC (HL-LHC) in order to optimize the detector performance. The evolution of these parameters at the two main interaction points of the HL-LHC along optimum physics fills is studied for the baseline and alternative operational scenarios with the latest set of parameters, including a refined description of the longitudinal bunch profile. Results are discussed in terms of a new figure-of-merit, the effective pile-up density. 		 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-TUPIK089  
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TUPVA030 Measurement of Beta-Beating Due to Strong Head-on Beam-Beam Interactions in the LHC 2121
 
  • P. Gonçalves Jorge, J. Barranco García, T. Pieloni
    EPFL, Lausanne, Switzerland
  • X. Buffat, F.S. Carlier, J.M. Coello de Portugal, E. Fol, L.E. Medina Medrano, R. Tomás, A. Wegscheider
    CERN, Geneva, Switzerland
  
  The LHC operation relies on a good knowledge of the optics, usually corrected in absence of beam-beam interactions. In a near future, both the LHC and the HL-LHC will need to cope with large head-on beam-beam parameters, the impact on the optics needs to be understood and, if necessary, corrected. The results of a dedicated experiment performed at injection energy are discussed in this paper.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-TUPVA030  
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WEOAB2 Correction of Beta-Beating Due to Beam-Beam for the LHC and Its Impact on Dynamic Aperture 2512
 
  • L.E. Medina Medrano, J. Barranco García, X. Buffat, Y. Papaphilippou, T. Pieloni, R. Tomás
    CERN, Geneva, Switzerland
  • J. Barranco García, T. Pieloni
    EPFL, Lausanne, Switzerland
  • L.E. Medina Medrano
    UGTO, Leon, Mexico
  
  Funding: This work is supported by the European Circular Energy-Frontier Collider Study, H2020 programme under grant agreement no. 654305, by the Swiss State Secretariat for Education, Research and Innovation SERI, and by the Beam project (CONACYT, Mexico).
Minimization of the beta-beating at the two main interaction points of the LHC arising from the head-on and long-range beam-beam interactions can be performed by adjusting the strength of quadrupole or sextupole correctors. This compensation scheme is applied to the current LHC optics where the results show a significant reduction of the peak and RMS beta-beating; and the impact on the dynamic aperture is computed. A proposal for a similar strategy to be adopted in the High Luminosity LHC is also discussed. 		 
slides icon Slides WEOAB2 [6.292 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-WEOAB2  
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