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Possibilities for transverse feedback phase adjustment by means of digital filters

In transverse feedback systems a phase adjustment is generally required to convert a beam position signal from a pick-up into a momentum correction signal used by a transverse kicker. In this paper we outline several possibilities for phase adjustments using only single pickups or the vector combina...

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Autor principal: Kotzian, G
Lenguaje:eng
Publicado: 2017
Materias:
Acceso en línea:https://dx.doi.org/10.1088/1742-6596/874/1/012089
https://dx.doi.org/10.18429/JACoW-IPAC2017-TUPIK095
http://cds.cern.ch/record/2276056
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author Kotzian, G
author_facet Kotzian, G
author_sort Kotzian, G
collection CERN
description In transverse feedback systems a phase adjustment is generally required to convert a beam position signal from a pick-up into a momentum correction signal used by a transverse kicker. In this paper we outline several possibilities for phase adjustments using only single pickups or the vector combination of two pick-ups. Analytical expressions are given as a function of the fractional tune and the betatron phase advance between the pick-up location and the kicker. The shortest possible digital filter is formulated, including a notch for closed orbit suppression and a free parameter to adjust for betatron phase. We introduce a novel, fully parametrized digital filter with the feature to be insensitive to variations in fractional tune. Examples are given for the SPS transverse feedback system and compared with measurements.
id oai-inspirehep.net-1611204
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2017
record_format invenio
spelling oai-inspirehep.net-16112042021-02-09T10:05:53Zdoi:10.1088/1742-6596/874/1/012089doi:10.18429/JACoW-IPAC2017-TUPIK095http://cds.cern.ch/record/2276056engKotzian, GPossibilities for transverse feedback phase adjustment by means of digital filtersAccelerators and Storage RingsIn transverse feedback systems a phase adjustment is generally required to convert a beam position signal from a pick-up into a momentum correction signal used by a transverse kicker. In this paper we outline several possibilities for phase adjustments using only single pickups or the vector combination of two pick-ups. Analytical expressions are given as a function of the fractional tune and the betatron phase advance between the pick-up location and the kicker. The shortest possible digital filter is formulated, including a notch for closed orbit suppression and a free parameter to adjust for betatron phase. We introduce a novel, fully parametrized digital filter with the feature to be insensitive to variations in fractional tune. Examples are given for the SPS transverse feedback system and compared with measurements.CERN-ACC-2017-314oai:inspirehep.net:16112042017
spellingShingle Accelerators and Storage Rings
Kotzian, G
Possibilities for transverse feedback phase adjustment by means of digital filters
title Possibilities for transverse feedback phase adjustment by means of digital filters
title_full Possibilities for transverse feedback phase adjustment by means of digital filters
title_fullStr Possibilities for transverse feedback phase adjustment by means of digital filters
title_full_unstemmed Possibilities for transverse feedback phase adjustment by means of digital filters
title_short Possibilities for transverse feedback phase adjustment by means of digital filters
title_sort possibilities for transverse feedback phase adjustment by means of digital filters
topic Accelerators and Storage Rings
url https://dx.doi.org/10.1088/1742-6596/874/1/012089
https://dx.doi.org/10.18429/JACoW-IPAC2017-TUPIK095
http://cds.cern.ch/record/2276056
work_keys_str_mv AT kotziang possibilitiesfortransversefeedbackphaseadjustmentbymeansofdigitalfilters