Validation of Off-momentum Cleaning Performance of the LHC Collimation System

The LHC collimation system is designed to provide effective cleaning against losses coming from off-momentum particles, either due to un-captured beam or to an unexpected RF frequency change. For this reason the LHC is equipped with a hierarchy of collimators in IR3: primary, secondary and absorber...

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Detalles Bibliográficos
Autores principales: Salvachua, Belen, Baudrenghien, Philippe, Bruce, Roderik, Garcia, Hector, Hermes, Pascal, Jackson, Stephen, Jaussi, Michael, Kwee-Hinzmann, Regina, Mereghetti, Alessio, Mirarchi, Daniele, Redaelli, Stefano, Timko, Helga, Valentino, Gianluca, Valloni, Alessandra
Lenguaje:eng
Publicado: 2016
Materias:
Accelerators and Storage Rings
Acceso en línea:https://dx.doi.org/10.18429/JACoW-IPAC2016-WEPMW007
http://cds.cern.ch/record/2207405
Descripción
Sumario:The LHC collimation system is designed to provide effective cleaning against losses coming from off-momentum particles, either due to un-captured beam or to an unexpected RF frequency change. For this reason the LHC is equipped with a hierarchy of collimators in IR3: primary, secondary and absorber collimators. After every collimator alignment or change of machine configuration the off-momentum cleaning efficiency is validated with loss maps at low intensity. We describe here the improved technique used in 2015 to generate such loss maps without completely dumping the beam into the collimators. The achieved performance of the collimation system for momentum cleaning is reviewed.

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