Keyword: brightness
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MOA1PL02 Beam Dynamics Challenges for the LHC and Injector Upgrades emittance, injection, impedance, space-charge 8
 
  • G. Rumolo
    CERN, Geneva, Switzerland
 
  The High Luminosity upgrade of the Large Hadron Collider (HL-LHC) will rely on significantly higher bunch current and brightness to meet the future yearly integrated luminosity target. The implications are twofold. On one side, all the accelerators of the LHC injection chain will have to be upgraded to produce the desired beam parameters. For this purpose, the LHC Injectors Upgrade (LIU) program has been established to implement all the needed modifications for meeting the required beam specifications. These upgrades will lead to the lifting of the main intensity and brightness limitations in the injectors, linked to beam instabilities driven by impedance or electron cloud (e-cloud), and space charge. On the other side, the LHC will have to be able to swallow the new beam parameters. This will mainly require control of impedance driven instabilities and beam-beam effects, and e-cloud mitigation. In this paper, we will focus on proton beams by describing the identified performance limitations of the LHC and its injectors, as well as the actions envisioned to overcome them.  
slides icon Slides MOA1PL02 [13.138 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-HB2018-MOA1PL02  
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THA1WD04 High-Brightness Challenges for the Operation of the CERN Injector Complex injection, linac, emittance, proton 352
 
  • K. Hanke, S.C.P. Albright, R. Alemany-Fernández, H. Bartosik, E. Chapochnikova, H. Damerau, G.P. Di Giovanni, B. Goddard, A. Huschauer, V. Kain, A. Lasheen, M. Meddahi, B. Mikulec, G. Rumolo, R. Scrivens, F. Tecker
    CERN, Geneva, Switzerland
 
  CERN's LHC injectors are delivering high-brightness proton and ion beams for the Large Hadron Collider LHC. We review the present operation modes and beam performance, and highlight the limitations. We will then give an overview of the upgrade program that has been put in place to meet the demands of the LHC during the High-Luminosity LHC era.  
slides icon Slides THA1WD04 [4.746 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-HB2018-THA1WD04  
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THA2WD01 Operation Challenges and Performance of the LHC During Run II luminosity, emittance, MMI, operation 357
 
  • R. Steerenberg, J. Wenninger
    CERN, Geneva, Switzerland
 
  The CERN Large Hadron Collider Run II saw an important increase in beam performance through both, improvements in the LHC and an increased beam brightness from the injectors, leading to a peak luminosity that exceeds the LHC design luminosity by more than a factor two. This contribution will give an overview of run 2, the main challenges encountered and it will address the measures applied to deal with and make use of the increased beam brightness. Finally potential areas where further performance improvement can be a realized will be identified.  
slides icon Slides THA2WD01 [6.709 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-HB2018-THA2WD01  
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