Influence of Varying Tune width on the Robustness of the LHC Tune PLL and its Application for Continuous Chromaticity Measurement

Tune and chromaticity measurement is an integral part of safe and reliable LHC operation. Tight tolerances on the maximum transverse beam excursions allow oscillation amplitudes of less than 30 μm. This leaves only a small margin for transverse beam and momentum excitations required for measuring t...

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Detalles Bibliográficos
Autores principales: Boccardi, A, Gasior, M, Jones, R, Kasinski, KK, Steinhagen, R
Lenguaje:eng
Publicado: 2007
Materias:
Accelerators and Storage Rings
Acceso en línea:https://dx.doi.org/10.1109/PAC.2007.4440200
http://cds.cern.ch/record/1045963
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author Boccardi, A
Gasior, M
Jones, R
Kasinski, KK
Steinhagen, R
author_facet Boccardi, A
Gasior, M
Jones, R
Kasinski, KK
Steinhagen, R
author_sort Boccardi, A
collection CERN
description Tune and chromaticity measurement is an integral part of safe and reliable LHC operation. Tight tolerances on the maximum transverse beam excursions allow oscillation amplitudes of less than 30 μm. This leaves only a small margin for transverse beam and momentum excitations required for measuring tune and chromaticity. This contribution discusses a robust tune phase-locked-loop (PLL) operation in the presence of non-linearities and varying chromaticity. The loop design was tested at the SPS, using the LHC PLL prototype system. The system was also used to continuously measure tune width and chromaticity, using resonant transverse excitations of the tune side-slopes.
id cern-1045963
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2007
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spelling cern-10459632023-05-31T13:23:34Zdoi:10.1109/PAC.2007.4440200http://cds.cern.ch/record/1045963engBoccardi, AGasior, MJones, RKasinski, KKSteinhagen, RInfluence of Varying Tune width on the Robustness of the LHC Tune PLL and its Application for Continuous Chromaticity MeasurementAccelerators and Storage RingsTune and chromaticity measurement is an integral part of safe and reliable LHC operation. Tight tolerances on the maximum transverse beam excursions allow oscillation amplitudes of less than 30 μm. This leaves only a small margin for transverse beam and momentum excitations required for measuring tune and chromaticity. This contribution discusses a robust tune phase-locked-loop (PLL) operation in the presence of non-linearities and varying chromaticity. The loop design was tested at the SPS, using the LHC PLL prototype system. The system was also used to continuously measure tune width and chromaticity, using resonant transverse excitations of the tune side-slopes.CERN-AB-2007-031LHC-PROJECT-Report-1027CERN-LHC-PROJECT-Report-1027oai:cds.cern.ch:10459632007
spellingShingle Accelerators and Storage Rings
Boccardi, A
Gasior, M
Jones, R
Kasinski, KK
Steinhagen, R
Influence of Varying Tune width on the Robustness of the LHC Tune PLL and its Application for Continuous Chromaticity Measurement
title Influence of Varying Tune width on the Robustness of the LHC Tune PLL and its Application for Continuous Chromaticity Measurement
title_full Influence of Varying Tune width on the Robustness of the LHC Tune PLL and its Application for Continuous Chromaticity Measurement
title_fullStr Influence of Varying Tune width on the Robustness of the LHC Tune PLL and its Application for Continuous Chromaticity Measurement
title_full_unstemmed Influence of Varying Tune width on the Robustness of the LHC Tune PLL and its Application for Continuous Chromaticity Measurement
title_short Influence of Varying Tune width on the Robustness of the LHC Tune PLL and its Application for Continuous Chromaticity Measurement
title_sort influence of varying tune width on the robustness of the lhc tune pll and its application for continuous chromaticity measurement
topic Accelerators and Storage Rings
url https://dx.doi.org/10.1109/PAC.2007.4440200
http://cds.cern.ch/record/1045963
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AT gasiorm influenceofvaryingtunewidthontherobustnessofthelhctunepllanditsapplicationforcontinuouschromaticitymeasurement
AT jonesr influenceofvaryingtunewidthontherobustnessofthelhctunepllanditsapplicationforcontinuouschromaticitymeasurement
AT kasinskikk influenceofvaryingtunewidthontherobustnessofthelhctunepllanditsapplicationforcontinuouschromaticitymeasurement
AT steinhagenr influenceofvaryingtunewidthontherobustnessofthelhctunepllanditsapplicationforcontinuouschromaticitymeasurement

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