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TUPRO003 |
Fast Crab Cavity Failures in HL-LHC |
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SUSPSNE004 |
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- 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
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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.
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DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-IPAC2014-TUPRO003
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