The damper for the transverse instabilities of the SPS

For beam intensities above 10/sup 12/ protons per pulse in the SPS, collective transverse beam instabilities develop with frequencies between 15 kHz and 3 MHz because of the resistive wall effect of the vacuum chamber. An active feedback system with an electrostatic deflector has been installed in t...

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Detalles Bibliográficos
Autores principales: Bossart, Rudolf, Burnod, L, Gareyte, Jacques, de Raad, Bastiaan, Rossi, V
Lenguaje:eng
Publicado: 1979
Materias:
Accelerators and Storage Rings
Acceso en línea:https://dx.doi.org/10.1109/TNS.1979.4330010
http://cds.cern.ch/record/133211
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author Bossart, Rudolf
Burnod, L
Gareyte, Jacques
de Raad, Bastiaan
Rossi, V
author_facet Bossart, Rudolf
Burnod, L
Gareyte, Jacques
de Raad, Bastiaan
Rossi, V
author_sort Bossart, Rudolf
collection CERN
description For beam intensities above 10/sup 12/ protons per pulse in the SPS, collective transverse beam instabilities develop with frequencies between 15 kHz and 3 MHz because of the resistive wall effect of the vacuum chamber. An active feedback system with an electrostatic deflector has been installed in the SPS for damping the resistive wall instabilities in both the vertical and horizontal planes. Measurements have been made to determine the threshold and growth rate of these instabilities. As a novel application, the damper can be used also for the excitation of small coherent betatron oscillations. A phase-locked loop tracks the beam oscillations and provides a continuous display of the betatron wave-number Q during the cycle. (4 refs).
id cern-133211
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 1979
record_format invenio
spelling cern-1332112023-05-21T12:41:27Zdoi:10.1109/TNS.1979.4330010http://cds.cern.ch/record/133211engBossart, RudolfBurnod, LGareyte, Jacquesde Raad, BastiaanRossi, VThe damper for the transverse instabilities of the SPSAccelerators and Storage RingsFor beam intensities above 10/sup 12/ protons per pulse in the SPS, collective transverse beam instabilities develop with frequencies between 15 kHz and 3 MHz because of the resistive wall effect of the vacuum chamber. An active feedback system with an electrostatic deflector has been installed in the SPS for damping the resistive wall instabilities in both the vertical and horizontal planes. Measurements have been made to determine the threshold and growth rate of these instabilities. As a novel application, the damper can be used also for the excitation of small coherent betatron oscillations. A phase-locked loop tracks the beam oscillations and provides a continuous display of the betatron wave-number Q during the cycle. (4 refs).CERN-SPS-ABM-RB-Report-79-3oai:cds.cern.ch:1332111979
spellingShingle Accelerators and Storage Rings
Bossart, Rudolf
Burnod, L
Gareyte, Jacques
de Raad, Bastiaan
Rossi, V
The damper for the transverse instabilities of the SPS
title The damper for the transverse instabilities of the SPS
title_full The damper for the transverse instabilities of the SPS
title_fullStr The damper for the transverse instabilities of the SPS
title_full_unstemmed The damper for the transverse instabilities of the SPS
title_short The damper for the transverse instabilities of the SPS
title_sort damper for the transverse instabilities of the sps
topic Accelerators and Storage Rings
url https://dx.doi.org/10.1109/TNS.1979.4330010
http://cds.cern.ch/record/133211
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AT bossartrudolf damperforthetransverseinstabilitiesofthesps
AT burnodl damperforthetransverseinstabilitiesofthesps
AT gareytejacques damperforthetransverseinstabilitiesofthesps
AT deraadbastiaan damperforthetransverseinstabilitiesofthesps
AT rossiv damperforthetransverseinstabilitiesofthesps

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