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Operational experience of a prototype LHC injection kicker magnet with a low SEY coating and redistributed power deposition

In the event that it is necessary to exchange an LHC injection kicker magnet (MKI), the newly installed kicker magnet would limit operation for a few hundred hours due to dynamic vacuum. A surface coating with a low secondary electron yield, applied to the inner surface of an alumina tube to reduce...

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Autores principales: Barnes, Michael, Bracco, Chiara, Bregliozzi, Giuseppe, Chmielinska, Agnieszka, Ducimetière, Laurent, Goddard, Brennan, Iadarola, Giovanni, Kramer, Thomas, Vega Cid, Lorena, Vlachodimitropoulos, Vasileios, Weterings, Wim
Lenguaje:eng
Publicado: 2019
Materias:
Acceso en línea:https://dx.doi.org/10.18429/JACoW-IPAC2019-THPRB072
https://dx.doi.org/10.1088/1742-6596/1350/1/012145
http://cds.cern.ch/record/2692490
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author Barnes, Michael
Bracco, Chiara
Bregliozzi, Giuseppe
Chmielinska, Agnieszka
Ducimetière, Laurent
Goddard, Brennan
Iadarola, Giovanni
Kramer, Thomas
Vega Cid, Lorena
Vlachodimitropoulos, Vasileios
Weterings, Wim
author_facet Barnes, Michael
Bracco, Chiara
Bregliozzi, Giuseppe
Chmielinska, Agnieszka
Ducimetière, Laurent
Goddard, Brennan
Iadarola, Giovanni
Kramer, Thomas
Vega Cid, Lorena
Vlachodimitropoulos, Vasileios
Weterings, Wim
author_sort Barnes, Michael
collection CERN
description In the event that it is necessary to exchange an LHC injection kicker magnet (MKI), the newly installed kicker magnet would limit operation for a few hundred hours due to dynamic vacuum. A surface coating with a low secondary electron yield, applied to the inner surface of an alumina tube to reduce dynamic vacuum activity without increasing the probability of Unidentified Falling Objects, and which is compatible with the high voltage environment, was included in an upgraded MKI installed in the LHC during the 2017-18 Year End Technical Stop. In addition, this MKI included an upgrade to relocate a significant portion of beam induced power from the yoke to a "damping element": this element is not at pulsed high voltage. The effectiveness of the upgrades has been demonstrated during LHC operation, hence a future version will include water cooling of the "damping element". This paper reviews dynamic vacuum around the MKIs and summarizes operational experience of the upgraded MKI.
id oai-inspirehep.net-1745812
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2019
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spelling oai-inspirehep.net-17458122022-04-08T08:08:01Zdoi:10.18429/JACoW-IPAC2019-THPRB072doi:10.1088/1742-6596/1350/1/012145http://cds.cern.ch/record/2692490engBarnes, MichaelBracco, ChiaraBregliozzi, GiuseppeChmielinska, AgnieszkaDucimetière, LaurentGoddard, BrennanIadarola, GiovanniKramer, ThomasVega Cid, LorenaVlachodimitropoulos, VasileiosWeterings, WimOperational experience of a prototype LHC injection kicker magnet with a low SEY coating and redistributed power depositionAccelerators and Storage RingsIn the event that it is necessary to exchange an LHC injection kicker magnet (MKI), the newly installed kicker magnet would limit operation for a few hundred hours due to dynamic vacuum. A surface coating with a low secondary electron yield, applied to the inner surface of an alumina tube to reduce dynamic vacuum activity without increasing the probability of Unidentified Falling Objects, and which is compatible with the high voltage environment, was included in an upgraded MKI installed in the LHC during the 2017-18 Year End Technical Stop. In addition, this MKI included an upgrade to relocate a significant portion of beam induced power from the yoke to a "damping element": this element is not at pulsed high voltage. The effectiveness of the upgrades has been demonstrated during LHC operation, hence a future version will include water cooling of the "damping element". This paper reviews dynamic vacuum around the MKIs and summarizes operational experience of the upgraded MKI.CERN-ACC-2019-249oai:inspirehep.net:17458122019
spellingShingle Accelerators and Storage Rings
Barnes, Michael
Bracco, Chiara
Bregliozzi, Giuseppe
Chmielinska, Agnieszka
Ducimetière, Laurent
Goddard, Brennan
Iadarola, Giovanni
Kramer, Thomas
Vega Cid, Lorena
Vlachodimitropoulos, Vasileios
Weterings, Wim
Operational experience of a prototype LHC injection kicker magnet with a low SEY coating and redistributed power deposition
title Operational experience of a prototype LHC injection kicker magnet with a low SEY coating and redistributed power deposition
title_full Operational experience of a prototype LHC injection kicker magnet with a low SEY coating and redistributed power deposition
title_fullStr Operational experience of a prototype LHC injection kicker magnet with a low SEY coating and redistributed power deposition
title_full_unstemmed Operational experience of a prototype LHC injection kicker magnet with a low SEY coating and redistributed power deposition
title_short Operational experience of a prototype LHC injection kicker magnet with a low SEY coating and redistributed power deposition
title_sort operational experience of a prototype lhc injection kicker magnet with a low sey coating and redistributed power deposition
topic Accelerators and Storage Rings
url https://dx.doi.org/10.18429/JACoW-IPAC2019-THPRB072
https://dx.doi.org/10.1088/1742-6596/1350/1/012145
http://cds.cern.ch/record/2692490
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