Cargando…
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...
Autor principal: | |
---|---|
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 |
_version_ | 1780955268728750080 |
---|---|
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 |