Calculation method for safe β* in the LHC

One way of increasing the peak luminosity in the LHC is to decrease the beam size at the interaction points by squeezing to smaller values of β*. The LHC is now in a regime where safety and stability determines the limit on β*, as opposed to traditional optics limits. In this paper, we derive a calc...

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Detalles Bibliográficos
Autores principales: Bruce, R, Assmann, R W, Herr, W, Wollmann, D
Lenguaje:eng
Publicado: 2011
Materias:
Accelerators and Storage Rings
Acceso en línea:http://cds.cern.ch/record/1382043
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author Bruce, R
Assmann, R W
Herr, W
Wollmann, D
author_facet Bruce, R
Assmann, R W
Herr, W
Wollmann, D
author_sort Bruce, R
collection CERN
description One way of increasing the peak luminosity in the LHC is to decrease the beam size at the interaction points by squeezing to smaller values of β*. The LHC is now in a regime where safety and stability determines the limit on β*, as opposed to traditional optics limits. In this paper, we derive a calculation model to determine the safe β*-values based on collimator settings and operational stability of the LHC. This model was used to calculate the settings for the LHC run in 2011. It was found that β* could be decreased from 3.5 m to 1.5 m, which has now successfully been put into operation.
id cern-1382043
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2011
record_format invenio
spelling cern-13820432022-08-17T13:31:38Zhttp://cds.cern.ch/record/1382043engBruce, RAssmann, R WHerr, WWollmann, DCalculation method for safe β* in the LHCAccelerators and Storage RingsOne way of increasing the peak luminosity in the LHC is to decrease the beam size at the interaction points by squeezing to smaller values of β*. The LHC is now in a regime where safety and stability determines the limit on β*, as opposed to traditional optics limits. In this paper, we derive a calculation model to determine the safe β*-values based on collimator settings and operational stability of the LHC. This model was used to calculate the settings for the LHC run in 2011. It was found that β* could be decreased from 3.5 m to 1.5 m, which has now successfully been put into operation.CERN-ATS-2011-140oai:cds.cern.ch:13820432011-09-14
spellingShingle Accelerators and Storage Rings
Bruce, R
Assmann, R W
Herr, W
Wollmann, D
Calculation method for safe β* in the LHC
title Calculation method for safe β* in the LHC
title_full Calculation method for safe β* in the LHC
title_fullStr Calculation method for safe β* in the LHC
title_full_unstemmed Calculation method for safe β* in the LHC
title_short Calculation method for safe β* in the LHC
title_sort calculation method for safe β* in the lhc
topic Accelerators and Storage Rings
url http://cds.cern.ch/record/1382043
work_keys_str_mv AT brucer calculationmethodforsafebinthelhc
AT assmannrw calculationmethodforsafebinthelhc
AT herrw calculationmethodforsafebinthelhc
AT wollmannd calculationmethodforsafebinthelhc

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