Longitudinal phenomena in the CERN SPS

After almost one year of operation two kinds of problems dominate the longitudinal behaviour of the SPS beam. At high energy longitudinal coupled bunch instabilities occur. They are driven by the RF cavity impedance both on its fundamental and high-order passbands. Present cures include damping the...

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Detalles Bibliográficos
Autores principales: Boussard, Daniel, Dôme, Georges, Linnecar, Trevor Paul R, Millich, Antonio
Lenguaje:eng
Publicado: 1977
Materias:
Detectors and Experimental Techniques
Acceso en línea:https://dx.doi.org/10.1109/TNS.1977.4328957
http://cds.cern.ch/record/878541
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author Boussard, Daniel
Dôme, Georges
Linnecar, Trevor Paul R
Millich, Antonio
author_facet Boussard, Daniel
Dôme, Georges
Linnecar, Trevor Paul R
Millich, Antonio
author_sort Boussard, Daniel
collection CERN
description After almost one year of operation two kinds of problems dominate the longitudinal behaviour of the SPS beam. At high energy longitudinal coupled bunch instabilities occur. They are driven by the RF cavity impedance both on its fundamental and high-order passbands. Present cures include damping the high-order modes of the cavities, Landau damping techniques and feedback systems. At the injection energy a debunching-rebunching procedure is performed in order to change from the 9.5 MHz RF frequency of the injector to the 200 MHz of the SPS. Debunched beam instabilities driven by the cavity and vacuum chamber impedances (up to the GHz region) at present limit the RF capture efficiency. (13 refs).
id cern-878541
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 1977
record_format invenio
spelling cern-8785412019-09-30T06:29:59Zdoi:10.1109/TNS.1977.4328957http://cds.cern.ch/record/878541engBoussard, DanielDôme, GeorgesLinnecar, Trevor Paul RMillich, AntonioLongitudinal phenomena in the CERN SPSDetectors and Experimental TechniquesAfter almost one year of operation two kinds of problems dominate the longitudinal behaviour of the SPS beam. At high energy longitudinal coupled bunch instabilities occur. They are driven by the RF cavity impedance both on its fundamental and high-order passbands. Present cures include damping the high-order modes of the cavities, Landau damping techniques and feedback systems. At the injection energy a debunching-rebunching procedure is performed in order to change from the 9.5 MHz RF frequency of the injector to the 200 MHz of the SPS. Debunched beam instabilities driven by the cavity and vacuum chamber impedances (up to the GHz region) at present limit the RF capture efficiency. (13 refs).oai:cds.cern.ch:8785411977
spellingShingle Detectors and Experimental Techniques
Boussard, Daniel
Dôme, Georges
Linnecar, Trevor Paul R
Millich, Antonio
Longitudinal phenomena in the CERN SPS
title Longitudinal phenomena in the CERN SPS
title_full Longitudinal phenomena in the CERN SPS
title_fullStr Longitudinal phenomena in the CERN SPS
title_full_unstemmed Longitudinal phenomena in the CERN SPS
title_short Longitudinal phenomena in the CERN SPS
title_sort longitudinal phenomena in the cern sps
topic Detectors and Experimental Techniques
url https://dx.doi.org/10.1109/TNS.1977.4328957
http://cds.cern.ch/record/878541
work_keys_str_mv AT boussarddaniel longitudinalphenomenainthecernsps
AT domegeorges longitudinalphenomenainthecernsps
AT linnecartrevorpaulr longitudinalphenomenainthecernsps
AT millichantonio longitudinalphenomenainthecernsps

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