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MD2148: Flat optics

This note reports on the first attempt to measure and correct optics errors at β∗=60/30 cm and β∗=60/15 cm flat optics. In the absence of the Beam 2 vertical AC dipole, the ADT was used in AC-dipole mode to verify local corrections in IR1. A peak β-beating of 24% remained after global corrections in t...

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Detalles Bibliográficos
Autores principales: Coello De Portugal - Martinez Vazquez, Jaime Maria, Fartoukh, Stephane, Fol, Elena, Garcia-Tabares Valdivieso, Ana, Maclean, Ewen Hamish, Malina, Lukas, Persson, Tobias Hakan Bjorn, Skowronski, Piotr Krzysztof, Solfaroli Camillocci, Matteo, Tomas Garcia, Rogelio, Wegscheider, Andreas
Lenguaje:eng
Publicado: 2018
Materias:
Acceso en línea:http://cds.cern.ch/record/2632141
Descripción
Sumario:This note reports on the first attempt to measure and correct optics errors at β∗=60/30 cm and β∗=60/15 cm flat optics. In the absence of the Beam 2 vertical AC dipole, the ADT was used in AC-dipole mode to verify local corrections in IR1. A peak β-beating of 24% remained after global corrections in the horizontal plane of arc 45 of Beam 1. β∗ measurements with K-modulation showed a peak β∗-beating of 16% or larger, as IP1 measurement could not be completed. Global corrections for Beam 2 were also computed.