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Luminosity Optimization near the Beam-Beam Limit by Increasing Bunch Length or Crossing Angle

We discuss the choice of bunch length and crossing angle near the beam-beam limit in a storage-ring collider. First, we derive expressions for the tune shifts of either bunched or continuous beams which are induced by a single collision with arbitrary crossing angle and bunch length, and for the ass...

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Detalles Bibliográficos
Autores principales: Ruggiero, F, Zimmermann, Frank
Lenguaje:eng
Publicado: 2002
Materias:
Acceso en línea:https://dx.doi.org/10.1103/PhysRevSTAB.5.061001
http://cds.cern.ch/record/540249
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author Ruggiero, F
Zimmermann, Frank
author_facet Ruggiero, F
Zimmermann, Frank
author_sort Ruggiero, F
collection CERN
description We discuss the choice of bunch length and crossing angle near the beam-beam limit in a storage-ring collider. First, we derive expressions for the tune shifts of either bunched or continuous beams which are induced by a single collision with arbitrary crossing angle and bunch length, and for the associated luminosities. Then, considering two collision points with alternating planes of crossing, we demonstrate that, if the total beam-beam tune shift is held constant, the collider luminosity increases as a function of bunch length and crossing angle. This implies a corresponding increase in the bunch intensity. As an illustration, we present numerical examples for an LHC upgrade and for the VLHC.
id cern-540249
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2002
record_format invenio
spelling cern-5402492023-05-05T13:08:13Zdoi:10.1103/PhysRevSTAB.5.061001http://cds.cern.ch/record/540249engRuggiero, FZimmermann, FrankLuminosity Optimization near the Beam-Beam Limit by Increasing Bunch Length or Crossing AngleAccelerators and Storage RingsWe discuss the choice of bunch length and crossing angle near the beam-beam limit in a storage-ring collider. First, we derive expressions for the tune shifts of either bunched or continuous beams which are induced by a single collision with arbitrary crossing angle and bunch length, and for the associated luminosities. Then, considering two collision points with alternating planes of crossing, we demonstrate that, if the total beam-beam tune shift is held constant, the collider luminosity increases as a function of bunch length and crossing angle. This implies a corresponding increase in the bunch intensity. As an illustration, we present numerical examples for an LHC upgrade and for the VLHC.CERN-SL-2002-005-Rev-APoai:cds.cern.ch:5402492002-03-05
spellingShingle Accelerators and Storage Rings
Ruggiero, F
Zimmermann, Frank
Luminosity Optimization near the Beam-Beam Limit by Increasing Bunch Length or Crossing Angle
title Luminosity Optimization near the Beam-Beam Limit by Increasing Bunch Length or Crossing Angle
title_full Luminosity Optimization near the Beam-Beam Limit by Increasing Bunch Length or Crossing Angle
title_fullStr Luminosity Optimization near the Beam-Beam Limit by Increasing Bunch Length or Crossing Angle
title_full_unstemmed Luminosity Optimization near the Beam-Beam Limit by Increasing Bunch Length or Crossing Angle
title_short Luminosity Optimization near the Beam-Beam Limit by Increasing Bunch Length or Crossing Angle
title_sort luminosity optimization near the beam-beam limit by increasing bunch length or crossing angle
topic Accelerators and Storage Rings
url https://dx.doi.org/10.1103/PhysRevSTAB.5.061001
http://cds.cern.ch/record/540249
work_keys_str_mv AT ruggierof luminosityoptimizationnearthebeambeamlimitbyincreasingbunchlengthorcrossingangle
AT zimmermannfrank luminosityoptimizationnearthebeambeamlimitbyincreasingbunchlengthorcrossingangle