Author: Lopez-Fernandez, R.
Paper Title Page
TUPRO003 Fast Crab Cavity Failures in HL-LHC 997
SUSPSNE004   use link to see paper's listing under its alternate paper code  
 
  • B. Yee-Rendón, R. Lopez-Fernandez
    CINVESTAV, Mexico City, Mexico
  • J. Barranco García
    EPFL, Lausanne, Switzerland
  • R. Calaga, R. Tomás, F. Zimmermann
    CERN, Geneva, Switzerland
 
  Crab cavities (CCs) are a key ingredient of the High-Luminosity Large Hadron Collider (HL-LHC)  to ensure head on collisions at the main experiments (ATLAS and CMS) and fully profit from the smaller β* provided by the ATS optics. At KEKB, CCs have exhibited abrupt changes of phase and voltage during a time period of few LHC turns and considering the large energy stored in the HL-LHC beam, CC failures represent a serious risk to the LHC machine protection. In this paper, we discuss the effect of CC voltage or phase changes on a time interval similar to, or longer than, necessary to dump the beam.  The simulations assume a realistic steady-state distribution to assess the beam losses for the HL-LHC.  Additionally, some strategies are studied to mitigate the damage caused by the failures.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-TUPRO003  
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