Test of a low gamma transition optics

By increasing the difference between the beam energy and gamma transition one can, in theory, raise the limit for the on-set of the so-called microwave instability and thus increase the maximum intensity per bunch. This is of interest for the high intensity beams demanded from the SPS by the LHC. A...

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Detalles Bibliográficos
Autores principales: Arduini, Gianluigi, Arimatea, C, Despas, C, Lamont, M, Normann, L, Scandale, Walter
Lenguaje:eng
Publicado: 1998
Materias:
Accelerators and Storage Rings
Acceso en línea:http://cds.cern.ch/record/702415
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author Arduini, Gianluigi
Arimatea, C
Despas, C
Lamont, M
Normann, L
Scandale, Walter
author_facet Arduini, Gianluigi
Arimatea, C
Despas, C
Lamont, M
Normann, L
Scandale, Walter
author_sort Arduini, Gianluigi
collection CERN
description By increasing the difference between the beam energy and gamma transition one can, in theory, raise the limit for the on-set of the so-called microwave instability and thus increase the maximum intensity per bunch. This is of interest for the high intensity beams demanded from the SPS by the LHC. A fully fledged realization of a low gamma transition scheme in the SPS would involve the installation of additional quadrupoles, however by moving the tunes near to a multiple of the super period of the SPS it is possible to artificially lower gamma transition. To this end an optics was developed with tunes close to 24. 26 GeV protons were injected into the MD cycle on which this optics had been installed. Comparative longitudinal impedance measurements were made on both the low gamma transition optics and the normal fixed target optics.
id cern-702415
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 1998
record_format invenio
spelling cern-7024152023-05-11T12:03:23Zhttp://cds.cern.ch/record/702415engArduini, GianluigiArimatea, CDespas, CLamont, MNormann, LScandale, WalterTest of a low gamma transition opticsAccelerators and Storage RingsBy increasing the difference between the beam energy and gamma transition one can, in theory, raise the limit for the on-set of the so-called microwave instability and thus increase the maximum intensity per bunch. This is of interest for the high intensity beams demanded from the SPS by the LHC. A fully fledged realization of a low gamma transition scheme in the SPS would involve the installation of additional quadrupoles, however by moving the tunes near to a multiple of the super period of the SPS it is possible to artificially lower gamma transition. To this end an optics was developed with tunes close to 24. 26 GeV protons were injected into the MD cycle on which this optics had been installed. Comparative longitudinal impedance measurements were made on both the low gamma transition optics and the normal fixed target optics.SL-Note-98-001-MDoai:cds.cern.ch:7024151998-01-06
spellingShingle Accelerators and Storage Rings
Arduini, Gianluigi
Arimatea, C
Despas, C
Lamont, M
Normann, L
Scandale, Walter
Test of a low gamma transition optics
title Test of a low gamma transition optics
title_full Test of a low gamma transition optics
title_fullStr Test of a low gamma transition optics
title_full_unstemmed Test of a low gamma transition optics
title_short Test of a low gamma transition optics
title_sort test of a low gamma transition optics
topic Accelerators and Storage Rings
url http://cds.cern.ch/record/702415
work_keys_str_mv AT arduinigianluigi testofalowgammatransitionoptics
AT arimateac testofalowgammatransitionoptics
AT despasc testofalowgammatransitionoptics
AT lamontm testofalowgammatransitionoptics
AT normannl testofalowgammatransitionoptics
AT scandalewalter testofalowgammatransitionoptics

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