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Towards the Automatic Setup of Longitudinal Emittance Blow-Up in the CERN SPS

Controlled longitudinal emittance blow-up in the CERN SPS is necessary to stabilize high-intensity beams for the High-Luminosity LHC (HL-LHC) by increasing the synchrotron frequency spread. The process consists of injecting bandwidth-limited noise into the main RF phase loop to diffuse particles in...

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Autores principales: Bruchon, Niky, Karpov, Ivan, Madysa, Nico, Papotti, Giulia, Quartullo, Danilo, Zisou, Charilaos
Lenguaje:eng
Publicado: 2022
Materias:
Acceso en línea:https://dx.doi.org/10.18429/JACoW-IPAC2022-TUPOST042
http://cds.cern.ch/record/2845769
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author Bruchon, Niky
Karpov, Ivan
Madysa, Nico
Papotti, Giulia
Quartullo, Danilo
Zisou, Charilaos
author_facet Bruchon, Niky
Karpov, Ivan
Madysa, Nico
Papotti, Giulia
Quartullo, Danilo
Zisou, Charilaos
author_sort Bruchon, Niky
collection CERN
description Controlled longitudinal emittance blow-up in the CERN SPS is necessary to stabilize high-intensity beams for the High-Luminosity LHC (HL-LHC) by increasing the synchrotron frequency spread. The process consists of injecting bandwidth-limited noise into the main RF phase loop to diffuse particles in the core of the bunch. The setting up of the noise parameters, such as frequency band and amplitude, is a non-trivial and time-consuming procedure that has been performed manually so far. In this preliminary study, several optimization methods are investigated to set up the noise parameters automatically. We apply the CERN Common Optimization Interfaces as a generic framework for the optimization algorithm. Single-bunch profiles generated with the BLonD simulation code have been used to investigate the optimization algorithms offline. Furthermore, analysis has been carried out on measured bunch profiles in the SPS to define the problem constraints and properly formulate the objective function.
id cern-2845769
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2022
record_format invenio
spelling cern-28457692023-06-07T13:40:20Zdoi:10.18429/JACoW-IPAC2022-TUPOST042http://cds.cern.ch/record/2845769engBruchon, NikyKarpov, IvanMadysa, NicoPapotti, GiuliaQuartullo, DaniloZisou, CharilaosTowards the Automatic Setup of Longitudinal Emittance Blow-Up in the CERN SPSAccelerators and Storage RingsControlled longitudinal emittance blow-up in the CERN SPS is necessary to stabilize high-intensity beams for the High-Luminosity LHC (HL-LHC) by increasing the synchrotron frequency spread. The process consists of injecting bandwidth-limited noise into the main RF phase loop to diffuse particles in the core of the bunch. The setting up of the noise parameters, such as frequency band and amplitude, is a non-trivial and time-consuming procedure that has been performed manually so far. In this preliminary study, several optimization methods are investigated to set up the noise parameters automatically. We apply the CERN Common Optimization Interfaces as a generic framework for the optimization algorithm. Single-bunch profiles generated with the BLonD simulation code have been used to investigate the optimization algorithms offline. Furthermore, analysis has been carried out on measured bunch profiles in the SPS to define the problem constraints and properly formulate the objective function.oai:cds.cern.ch:28457692022
spellingShingle Accelerators and Storage Rings
Bruchon, Niky
Karpov, Ivan
Madysa, Nico
Papotti, Giulia
Quartullo, Danilo
Zisou, Charilaos
Towards the Automatic Setup of Longitudinal Emittance Blow-Up in the CERN SPS
title Towards the Automatic Setup of Longitudinal Emittance Blow-Up in the CERN SPS
title_full Towards the Automatic Setup of Longitudinal Emittance Blow-Up in the CERN SPS
title_fullStr Towards the Automatic Setup of Longitudinal Emittance Blow-Up in the CERN SPS
title_full_unstemmed Towards the Automatic Setup of Longitudinal Emittance Blow-Up in the CERN SPS
title_short Towards the Automatic Setup of Longitudinal Emittance Blow-Up in the CERN SPS
title_sort towards the automatic setup of longitudinal emittance blow-up in the cern sps
topic Accelerators and Storage Rings
url https://dx.doi.org/10.18429/JACoW-IPAC2022-TUPOST042
http://cds.cern.ch/record/2845769
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