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Amorphous Carbon Thin Film Coating of the SPS Beamline: Evaluation of the First Coating Implementation

As part of the LHC Injector Upgrade (LIU) project, the Super Proton Synchrotron (SPS) must be upgraded in order to inject in the LHC 25 ns bunch spaced beams of higher intensity. To mitigate the Electron Multipacting (EM) phenomenon in the SPS, CERN developed thin film carbon coatings with a low Sec...

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Autores principales: Van Gompel, Matthias, Chiggiato, Paolo, Costa Pinto, Pedro, Cruikshank, Paul, Pasquino, Chiara, Perez Espinos, Jaime, Sapountzis, Antonios, Taborelli, Mauro, Vollenberg, Wilhelmus
Lenguaje:eng
Publicado: 2017
Materias:
Acceso en línea:https://dx.doi.org/10.18429/JACoW-IPAC2017-MOOCA3
http://cds.cern.ch/record/2287335
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author Van Gompel, Matthias
Chiggiato, Paolo
Costa Pinto, Pedro
Cruikshank, Paul
Pasquino, Chiara
Perez Espinos, Jaime
Sapountzis, Antonios
Taborelli, Mauro
Vollenberg, Wilhelmus
author_facet Van Gompel, Matthias
Chiggiato, Paolo
Costa Pinto, Pedro
Cruikshank, Paul
Pasquino, Chiara
Perez Espinos, Jaime
Sapountzis, Antonios
Taborelli, Mauro
Vollenberg, Wilhelmus
author_sort Van Gompel, Matthias
collection CERN
description As part of the LHC Injector Upgrade (LIU) project, the Super Proton Synchrotron (SPS) must be upgraded in order to inject in the LHC 25 ns bunch spaced beams of higher intensity. To mitigate the Electron Multipacting (EM) phenomenon in the SPS, CERN developed thin film carbon coatings with a low Secondary Electron Yield (SEY). The development went from coating small samples, up to coating of 6 m long vacuum chambers directly installed in the magnets. To deposit the low SEY amorphous carbon (aC) film on the vacuum chamber inner wall of SPS ring components, a modular hollow cathode train was designed. The minimization of the logistical impact requires a strategy combining in-situ and ex-situ coating, depending on the type of components. To validate the implementation strategy of the aC thin films and the in-situ coating process along the 7 km long SPS beamline, approximately 2 cells of B-type bending dipoles and 9 focussing quadrupoles are foreseen to be treated with the aC coating during the Extended Year End Technical Stop (EYETS) 2016-2017. We will discuss the coating technique and evaluate both the implementation process and the resulting coating performance.
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institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2017
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spelling oai-inspirehep.net-16261862019-09-30T06:29:59Zdoi:10.18429/JACoW-IPAC2017-MOOCA3http://cds.cern.ch/record/2287335engVan Gompel, MatthiasChiggiato, PaoloCosta Pinto, PedroCruikshank, PaulPasquino, ChiaraPerez Espinos, JaimeSapountzis, AntoniosTaborelli, MauroVollenberg, WilhelmusAmorphous Carbon Thin Film Coating of the SPS Beamline: Evaluation of the First Coating ImplementationAccelerators and Storage RingsAs part of the LHC Injector Upgrade (LIU) project, the Super Proton Synchrotron (SPS) must be upgraded in order to inject in the LHC 25 ns bunch spaced beams of higher intensity. To mitigate the Electron Multipacting (EM) phenomenon in the SPS, CERN developed thin film carbon coatings with a low Secondary Electron Yield (SEY). The development went from coating small samples, up to coating of 6 m long vacuum chambers directly installed in the magnets. To deposit the low SEY amorphous carbon (aC) film on the vacuum chamber inner wall of SPS ring components, a modular hollow cathode train was designed. The minimization of the logistical impact requires a strategy combining in-situ and ex-situ coating, depending on the type of components. To validate the implementation strategy of the aC thin films and the in-situ coating process along the 7 km long SPS beamline, approximately 2 cells of B-type bending dipoles and 9 focussing quadrupoles are foreseen to be treated with the aC coating during the Extended Year End Technical Stop (EYETS) 2016-2017. We will discuss the coating technique and evaluate both the implementation process and the resulting coating performance.CERN-ACC-2017-304oai:inspirehep.net:16261862017
spellingShingle Accelerators and Storage Rings
Van Gompel, Matthias
Chiggiato, Paolo
Costa Pinto, Pedro
Cruikshank, Paul
Pasquino, Chiara
Perez Espinos, Jaime
Sapountzis, Antonios
Taborelli, Mauro
Vollenberg, Wilhelmus
Amorphous Carbon Thin Film Coating of the SPS Beamline: Evaluation of the First Coating Implementation
title Amorphous Carbon Thin Film Coating of the SPS Beamline: Evaluation of the First Coating Implementation
title_full Amorphous Carbon Thin Film Coating of the SPS Beamline: Evaluation of the First Coating Implementation
title_fullStr Amorphous Carbon Thin Film Coating of the SPS Beamline: Evaluation of the First Coating Implementation
title_full_unstemmed Amorphous Carbon Thin Film Coating of the SPS Beamline: Evaluation of the First Coating Implementation
title_short Amorphous Carbon Thin Film Coating of the SPS Beamline: Evaluation of the First Coating Implementation
title_sort amorphous carbon thin film coating of the sps beamline: evaluation of the first coating implementation
topic Accelerators and Storage Rings
url https://dx.doi.org/10.18429/JACoW-IPAC2017-MOOCA3
http://cds.cern.ch/record/2287335
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