Data-driven cross-talk modeling of beam losses in LHC collimators

The Large Hadron Collider at CERN is equipped with a collimation system to intercept potentially dangerous beam halo particles before they damage its sensitive equipment. The collimator settings are determined following a beam-based alignment procedure, in which the collimator jaws are moved towards...

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Autores principales: Azzopardi, Gabriella, Salvachua, Belen, Valentino, Gianluca
Lenguaje:eng
Publicado: 2019
Materias:
Acceso en línea:https://dx.doi.org/10.1103/PhysRevAccelBeams.22.083002
http://cds.cern.ch/record/2688505
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author Azzopardi, Gabriella
Salvachua, Belen
Valentino, Gianluca
author_facet Azzopardi, Gabriella
Salvachua, Belen
Valentino, Gianluca
author_sort Azzopardi, Gabriella
collection CERN
description The Large Hadron Collider at CERN is equipped with a collimation system to intercept potentially dangerous beam halo particles before they damage its sensitive equipment. The collimator settings are determined following a beam-based alignment procedure, in which the collimator jaws are moved towards the beam until losses appear in the beam loss monitors. When the collimator reaches the beam envelope, beam losses propagate mainly in the direction of the beam and are, therefore, also observed by other nearby beam loss monitors. This phenomenon is known as cross talk. Due to this, collimators are aligned sequentially to be able to identify which losses are generated by which collimator, such that any cross talk across beam loss monitors positioned close to each other is avoided. This paper seeks to quantify the levels of cross-talk observed by beam loss monitors when multiple collimators are moving, to be able to determine the actual beam loss signals generated by their corresponding collimators. The results obtained successfully predicted the amount of cross-talk observed for each of the cases tested in this study. This was then extended to predict loss map case studies and the proton impacts at each collimator by comparing them to simulations.
id oai-inspirehep.net-1749520
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2019
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spelling oai-inspirehep.net-17495202022-08-10T12:24:11Zdoi:10.1103/PhysRevAccelBeams.22.083002http://cds.cern.ch/record/2688505engAzzopardi, GabriellaSalvachua, BelenValentino, GianlucaData-driven cross-talk modeling of beam losses in LHC collimatorsAccelerators and Storage RingsThe Large Hadron Collider at CERN is equipped with a collimation system to intercept potentially dangerous beam halo particles before they damage its sensitive equipment. The collimator settings are determined following a beam-based alignment procedure, in which the collimator jaws are moved towards the beam until losses appear in the beam loss monitors. When the collimator reaches the beam envelope, beam losses propagate mainly in the direction of the beam and are, therefore, also observed by other nearby beam loss monitors. This phenomenon is known as cross talk. Due to this, collimators are aligned sequentially to be able to identify which losses are generated by which collimator, such that any cross talk across beam loss monitors positioned close to each other is avoided. This paper seeks to quantify the levels of cross-talk observed by beam loss monitors when multiple collimators are moving, to be able to determine the actual beam loss signals generated by their corresponding collimators. The results obtained successfully predicted the amount of cross-talk observed for each of the cases tested in this study. This was then extended to predict loss map case studies and the proton impacts at each collimator by comparing them to simulations.oai:inspirehep.net:17495202019
spellingShingle Accelerators and Storage Rings
Azzopardi, Gabriella
Salvachua, Belen
Valentino, Gianluca
Data-driven cross-talk modeling of beam losses in LHC collimators
title Data-driven cross-talk modeling of beam losses in LHC collimators
title_full Data-driven cross-talk modeling of beam losses in LHC collimators
title_fullStr Data-driven cross-talk modeling of beam losses in LHC collimators
title_full_unstemmed Data-driven cross-talk modeling of beam losses in LHC collimators
title_short Data-driven cross-talk modeling of beam losses in LHC collimators
title_sort data-driven cross-talk modeling of beam losses in lhc collimators
topic Accelerators and Storage Rings
url https://dx.doi.org/10.1103/PhysRevAccelBeams.22.083002
http://cds.cern.ch/record/2688505
work_keys_str_mv AT azzopardigabriella datadrivencrosstalkmodelingofbeamlossesinlhccollimators
AT salvachuabelen datadrivencrosstalkmodelingofbeamlossesinlhccollimators
AT valentinogianluca datadrivencrosstalkmodelingofbeamlossesinlhccollimators