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The PS 10 MHz High Level RF System Upgrade

In view of the upgrade of the injectors for the High Luminosity LHC, significantly higher bunch intensity is required for LHC-type beams. In this context an upgrade of the main accelerating RF system of the Proton Synchrotron (PS) is necessary, aiming at reducing the cavity impedance which is the so...

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Autores principales: Favia, Giorgia, Damerau, Heiko, Desquiens, Valentin, Energico, Salvatore, Morvillo, Michele, Perrelet, Damien, Rossi, Carlo
Lenguaje:eng
Publicado: 2016
Materias:
Acceso en línea:https://dx.doi.org/10.18429/JACoW-IPAC2016-MOPOR013
http://cds.cern.ch/record/2207325
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author Favia, Giorgia
Damerau, Heiko
Desquiens, Valentin
Energico, Salvatore
Morvillo, Michele
Perrelet, Damien
Rossi, Carlo
author_facet Favia, Giorgia
Damerau, Heiko
Desquiens, Valentin
Energico, Salvatore
Morvillo, Michele
Perrelet, Damien
Rossi, Carlo
author_sort Favia, Giorgia
collection CERN
description In view of the upgrade of the injectors for the High Luminosity LHC, significantly higher bunch intensity is required for LHC-type beams. In this context an upgrade of the main accelerating RF system of the Proton Synchrotron (PS) is necessary, aiming at reducing the cavity impedance which is the source of longitudinal coupled-bunch oscillations. These instabilities pose as a major limitation for the increase of the beam intensity as planned after LS2. The 10 MHz RF system consists in 11 ferrite loaded cavities, driven by tube-based power amplifiers for reasons of radiation hardness. The cavity-amplifier system is equipped with a wide-band feedback that reduces the beam induced voltage. A further reduction of the beam loading is foreseen by upgrading the feedback system, which can be reasonably achieved by increasing the loop gain of the existing amplification chain. This paper describes the progress of the design of the upgraded feedback system and shows the results of the tests on the new amplifier prototype, installed in the PS during the 2015-16 technical stop. It also reports the first results of its performance with beam, observed in the beginning of the 2016 run.
id oai-inspirehep.net-1469683
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2016
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spelling oai-inspirehep.net-14696832022-08-10T12:47:45Zdoi:10.18429/JACoW-IPAC2016-MOPOR013http://cds.cern.ch/record/2207325engFavia, GiorgiaDamerau, HeikoDesquiens, ValentinEnergico, SalvatoreMorvillo, MichelePerrelet, DamienRossi, CarloThe PS 10 MHz High Level RF System UpgradeAccelerators and Storage RingsIn view of the upgrade of the injectors for the High Luminosity LHC, significantly higher bunch intensity is required for LHC-type beams. In this context an upgrade of the main accelerating RF system of the Proton Synchrotron (PS) is necessary, aiming at reducing the cavity impedance which is the source of longitudinal coupled-bunch oscillations. These instabilities pose as a major limitation for the increase of the beam intensity as planned after LS2. The 10 MHz RF system consists in 11 ferrite loaded cavities, driven by tube-based power amplifiers for reasons of radiation hardness. The cavity-amplifier system is equipped with a wide-band feedback that reduces the beam induced voltage. A further reduction of the beam loading is foreseen by upgrading the feedback system, which can be reasonably achieved by increasing the loop gain of the existing amplification chain. This paper describes the progress of the design of the upgraded feedback system and shows the results of the tests on the new amplifier prototype, installed in the PS during the 2015-16 technical stop. It also reports the first results of its performance with beam, observed in the beginning of the 2016 run.IPAC-2016-MOPOR013CERN-ACC-2016-300oai:inspirehep.net:14696832016
spellingShingle Accelerators and Storage Rings
Favia, Giorgia
Damerau, Heiko
Desquiens, Valentin
Energico, Salvatore
Morvillo, Michele
Perrelet, Damien
Rossi, Carlo
The PS 10 MHz High Level RF System Upgrade
title The PS 10 MHz High Level RF System Upgrade
title_full The PS 10 MHz High Level RF System Upgrade
title_fullStr The PS 10 MHz High Level RF System Upgrade
title_full_unstemmed The PS 10 MHz High Level RF System Upgrade
title_short The PS 10 MHz High Level RF System Upgrade
title_sort ps 10 mhz high level rf system upgrade
topic Accelerators and Storage Rings
url https://dx.doi.org/10.18429/JACoW-IPAC2016-MOPOR013
http://cds.cern.ch/record/2207325
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