Automatic Correction of Betatron Coupling in the LHC Using Injection Oscillations

The control of the betatron coupling at injection and during the energy ramp is critical for the safe operation of the tune feedback and for the dynamic aperture. In the LHC every fill is preceded by the injection of a pilot bunch with low intensity. Using the injection oscillations from the pilot b...

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Detalles Bibliográficos
Autores principales: Persson, T, Bach, T, Jacquet, D, Kain, V, Levinsen, Y, McAteer, M-J, Maclean, E, Skowronski, P, Tomas, R, Vanbavinckhove, G, Miyamoto, R
Lenguaje:eng
Publicado: 2013
Materias:
Accelerators and Storage Rings
Acceso en línea:http://cds.cern.ch/record/1571166
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author Persson, T
Bach, T
Jacquet, D
Kain, V
Levinsen, Y
McAteer, M-J
Maclean, E
Skowronski, P
Tomas, R
Vanbavinckhove, G
Miyamoto, R
author_facet Persson, T
Bach, T
Jacquet, D
Kain, V
Levinsen, Y
McAteer, M-J
Maclean, E
Skowronski, P
Tomas, R
Vanbavinckhove, G
Miyamoto, R
author_sort Persson, T
collection CERN
description The control of the betatron coupling at injection and during the energy ramp is critical for the safe operation of the tune feedback and for the dynamic aperture. In the LHC every fill is preceded by the injection of a pilot bunch with low intensity. Using the injection oscillations from the pilot bunch we are able to measure the coupling at each individual BPM. The measurement is used to calculate a global coupling correction. The correction is based on the use of two orthogonal knobs which correct the real and imaginary part of the difference resonance term f1001, respectively. This method to correct the betatron coupling has been proven successful during the normal operation of the LHC. This paper presents the method used to calculate the corrections and its performance.
id cern-1571166
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2013
record_format invenio
spelling cern-15711662019-09-30T06:29:59Zhttp://cds.cern.ch/record/1571166engPersson, TBach, TJacquet, DKain, VLevinsen, YMcAteer, M-JMaclean, ESkowronski, PTomas, RVanbavinckhove, GMiyamoto, RAutomatic Correction of Betatron Coupling in the LHC Using Injection OscillationsAccelerators and Storage RingsThe control of the betatron coupling at injection and during the energy ramp is critical for the safe operation of the tune feedback and for the dynamic aperture. In the LHC every fill is preceded by the injection of a pilot bunch with low intensity. Using the injection oscillations from the pilot bunch we are able to measure the coupling at each individual BPM. The measurement is used to calculate a global coupling correction. The correction is based on the use of two orthogonal knobs which correct the real and imaginary part of the difference resonance term f1001, respectively. This method to correct the betatron coupling has been proven successful during the normal operation of the LHC. This paper presents the method used to calculate the corrections and its performance.CERN-ACC-2013-0045oai:cds.cern.ch:15711662013-05-12
spellingShingle Accelerators and Storage Rings
Persson, T
Bach, T
Jacquet, D
Kain, V
Levinsen, Y
McAteer, M-J
Maclean, E
Skowronski, P
Tomas, R
Vanbavinckhove, G
Miyamoto, R
Automatic Correction of Betatron Coupling in the LHC Using Injection Oscillations
title Automatic Correction of Betatron Coupling in the LHC Using Injection Oscillations
title_full Automatic Correction of Betatron Coupling in the LHC Using Injection Oscillations
title_fullStr Automatic Correction of Betatron Coupling in the LHC Using Injection Oscillations
title_full_unstemmed Automatic Correction of Betatron Coupling in the LHC Using Injection Oscillations
title_short Automatic Correction of Betatron Coupling in the LHC Using Injection Oscillations
title_sort automatic correction of betatron coupling in the lhc using injection oscillations
topic Accelerators and Storage Rings
url http://cds.cern.ch/record/1571166
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