Analysis of LHC transfer line trajectory drifts

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The LHC is filled from the SPS via two 3 km long transfer lines: TI2 for beam 1 and TI8 for beam 2. In the first years of LHC operation large trajectory variationswere discovered. The sources of bunch-by-bunch and shot-by-shot trajectory variations had been identified and improved by the 2012 LHC ru...

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Autores principales: Drosdal, L, Bartmann, W, Bartosik, H, Bracco, C, Gianfelice, E, Goddard, B, Kain, V, Papaphilippou, Y, Uythoven, J, Wenninger, J
Publicado: 2013
Materias:
Accelerators and Storage Rings
Particle Physics - Experiment
Acceso en línea:http://cds.cern.ch/record/1709867
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author Drosdal, L
Bartmann, W
Bartosik, H
Bracco, C
Gianfelice, E
Goddard, B
Kain, V
Papaphilippou, Y
Uythoven, J
Wenninger, J
author_facet Drosdal, L
Bartmann, W
Bartosik, H
Bracco, C
Gianfelice, E
Goddard, B
Kain, V
Papaphilippou, Y
Uythoven, J
Wenninger, J
author_sort Drosdal, L
collection CERN
description The LHC is filled from the SPS via two 3 km long transfer lines: TI2 for beam 1 and TI8 for beam 2. In the first years of LHC operation large trajectory variationswere discovered. The sources of bunch-by-bunch and shot-by-shot trajectory variations had been identified and improved by the 2012 LHC run. The origins of the longer term drifts were however still unclear and significant time was spent correcting the trajectories. In the last part of the 2012 run the optics in the SPS was changed to lower transition energy. Trajectory stability and correction frequency will be compared between before and after the optics change in the SPS. The sources of the variations have now been identified and will be discussed in this paper. Remedies for operation after the long shutdown will be proposed.
id cern-1709867
institution Organización Europea para la Investigación Nuclear
publishDate 2013
record_format invenio
spelling cern-17098672019-09-30T06:29:59Zhttp://cds.cern.ch/record/1709867Drosdal, LBartmann, WBartosik, HBracco, CGianfelice, EGoddard, BKain, VPapaphilippou, YUythoven, JWenninger, JAnalysis of LHC transfer line trajectory driftsAccelerators and Storage RingsParticle Physics - ExperimentThe LHC is filled from the SPS via two 3 km long transfer lines: TI2 for beam 1 and TI8 for beam 2. In the first years of LHC operation large trajectory variationswere discovered. The sources of bunch-by-bunch and shot-by-shot trajectory variations had been identified and improved by the 2012 LHC run. The origins of the longer term drifts were however still unclear and significant time was spent correcting the trajectories. In the last part of the 2012 run the optics in the SPS was changed to lower transition energy. Trajectory stability and correction frequency will be compared between before and after the optics change in the SPS. The sources of the variations have now been identified and will be discussed in this paper. Remedies for operation after the long shutdown will be proposed.FERMILAB-CONF-13-125-APCoai:cds.cern.ch:17098672013
spellingShingle Accelerators and Storage Rings
Particle Physics - Experiment
Drosdal, L
Bartmann, W
Bartosik, H
Bracco, C
Gianfelice, E
Goddard, B
Kain, V
Papaphilippou, Y
Uythoven, J
Wenninger, J
Analysis of LHC transfer line trajectory drifts
title Analysis of LHC transfer line trajectory drifts
title_full Analysis of LHC transfer line trajectory drifts
title_fullStr Analysis of LHC transfer line trajectory drifts
title_full_unstemmed Analysis of LHC transfer line trajectory drifts
title_short Analysis of LHC transfer line trajectory drifts
title_sort analysis of lhc transfer line trajectory drifts
topic Accelerators and Storage Rings
Particle Physics - Experiment
url http://cds.cern.ch/record/1709867
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AT bartmannw analysisoflhctransferlinetrajectorydrifts
AT bartosikh analysisoflhctransferlinetrajectorydrifts
AT braccoc analysisoflhctransferlinetrajectorydrifts
AT gianfelicee analysisoflhctransferlinetrajectorydrifts
AT goddardb analysisoflhctransferlinetrajectorydrifts
AT kainv analysisoflhctransferlinetrajectorydrifts
AT papaphilippouy analysisoflhctransferlinetrajectorydrifts
AT uythovenj analysisoflhctransferlinetrajectorydrifts
AT wenningerj analysisoflhctransferlinetrajectorydrifts

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