Measurement of the Effect on Single Bunch Stability of Changing Transition Energy in the CERN SPS

The SPS is the final accelerator in the chain which will be used to fill the Large Hadron Collider (LHC), at present under construction at CERN. The most critical limitation for single bunch intensity in the SPS comes from the longitudinal microwave instability. One of the ways to raise the instabil...

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Detalles Bibliográficos
Autores principales: Bohl, T, Lamont, M, Linnecar, Trevor Paul R, Scandale, Walter, Shaposhnikova, Elena
Lenguaje:eng
Publicado: 1998
Materias:
Accelerators and Storage Rings
Acceso en línea:http://cds.cern.ch/record/360138
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author Bohl, T
Lamont, M
Linnecar, Trevor Paul R
Scandale, Walter
Shaposhnikova, Elena
author_facet Bohl, T
Lamont, M
Linnecar, Trevor Paul R
Scandale, Walter
Shaposhnikova, Elena
author_sort Bohl, T
collection CERN
description The SPS is the final accelerator in the chain which will be used to fill the Large Hadron Collider (LHC), at present under construction at CERN. The most critical limitation for single bunch intensity in the SPS comes from the longitudinal microwave instability. One of the ways to raise the instability threshold is to decrease the transition energy which can be obtained by perturbing the dispersion function. In order to test expectations an experiment was performed in the SPS using the existing lattice. By adjusting the betatron tune at 26 GeV to be close to a multiple of the machine super perio d, a situation not acceptable for regular operation, the transition energy was reduced from 22 to 19 GeV. The results of this change on the beam were measured directly from the bunch spectrum.
id cern-360138
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 1998
record_format invenio
spelling cern-3601382023-05-05T13:07:26Zhttp://cds.cern.ch/record/360138engBohl, TLamont, MLinnecar, Trevor Paul RScandale, WalterShaposhnikova, ElenaMeasurement of the Effect on Single Bunch Stability of Changing Transition Energy in the CERN SPSAccelerators and Storage RingsThe SPS is the final accelerator in the chain which will be used to fill the Large Hadron Collider (LHC), at present under construction at CERN. The most critical limitation for single bunch intensity in the SPS comes from the longitudinal microwave instability. One of the ways to raise the instability threshold is to decrease the transition energy which can be obtained by perturbing the dispersion function. In order to test expectations an experiment was performed in the SPS using the existing lattice. By adjusting the betatron tune at 26 GeV to be close to a multiple of the machine super perio d, a situation not acceptable for regular operation, the transition energy was reduced from 22 to 19 GeV. The results of this change on the beam were measured directly from the bunch spectrum.CERN-SL-98-024-RFoai:cds.cern.ch:3601381998
spellingShingle Accelerators and Storage Rings
Bohl, T
Lamont, M
Linnecar, Trevor Paul R
Scandale, Walter
Shaposhnikova, Elena
Measurement of the Effect on Single Bunch Stability of Changing Transition Energy in the CERN SPS
title Measurement of the Effect on Single Bunch Stability of Changing Transition Energy in the CERN SPS
title_full Measurement of the Effect on Single Bunch Stability of Changing Transition Energy in the CERN SPS
title_fullStr Measurement of the Effect on Single Bunch Stability of Changing Transition Energy in the CERN SPS
title_full_unstemmed Measurement of the Effect on Single Bunch Stability of Changing Transition Energy in the CERN SPS
title_short Measurement of the Effect on Single Bunch Stability of Changing Transition Energy in the CERN SPS
title_sort measurement of the effect on single bunch stability of changing transition energy in the cern sps
topic Accelerators and Storage Rings
url http://cds.cern.ch/record/360138
work_keys_str_mv AT bohlt measurementoftheeffectonsinglebunchstabilityofchangingtransitionenergyinthecernsps
AT lamontm measurementoftheeffectonsinglebunchstabilityofchangingtransitionenergyinthecernsps
AT linnecartrevorpaulr measurementoftheeffectonsinglebunchstabilityofchangingtransitionenergyinthecernsps
AT scandalewalter measurementoftheeffectonsinglebunchstabilityofchangingtransitionenergyinthecernsps
AT shaposhnikovaelena measurementoftheeffectonsinglebunchstabilityofchangingtransitionenergyinthecernsps

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