MD1831: Single Bunch Instabilities with Q" and Non-Linear Corrections

During MD1751, it was observed that both a full single beam and 964 non-colliding bunches in Beam 1 (B1) and Beam 2 (B2) were both stable at the End of Squeeze (EOS) for 0A in the Landau Octupoles. At ß* = 40cm there is also a significant Q" arising from the lattice, as well as uncorrected non-...

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Detalles Bibliográficos
Autores principales: Carver, Lee Robert, Schenk, Michael, De Maria, Riccardo, Li, Kevin Shing Bruce, Amorim, David, Biancacci, Nicolo, Buffat, Xavier, Maclean, Ewen Hamish, Metral, Elias, Lasocha, Kacper, Lefevre, Thibaut, Levens, Tom, Salvant, Benoit
Lenguaje:eng
Publicado: 2017
Materias:
Accelerators and Storage Rings
Acceso en línea:http://cds.cern.ch/record/2253143
Descripción
Sumario:During MD1751, it was observed that both a full single beam and 964 non-colliding bunches in Beam 1 (B1) and Beam 2 (B2) were both stable at the End of Squeeze (EOS) for 0A in the Landau Octupoles. At ß* = 40cm there is also a significant Q" arising from the lattice, as well as uncorrected non-linearities in the Insertion Regions (IRs). Each of these effects could be capable of fully stabilising the beam. This MD made first use of a Q" knob through variation of the Main Sextupoles (MS) by stabilising a single bunch at Flat Top, before showing at EOS that the non-linearities were the main contributors to the beam stability.

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