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https://doi.org/10.18429/JACoW-IBIC2019-TUBO04
Title Measuring the Beam Profile by Counting Ionization Electrons
Authors
  • H.S. Sandberg, W. Bertsche
    UMAN, Manchester, United Kingdom
  • D. Bodart, B. Dehning, S. Levasseur, H.S. Sandberg, G. Schneider, J.W. Storey, R. Veness
    CERN, Geneva, Switzerland
  • S.M. Gibson
    Royal Holloway, University of London, Surrey, United Kingdom
  • K. Satou
    J-PARC, KEK & JAEA, Ibaraki-ken, Japan
Abstract The prin­ci­ple of non-de­struc­tive beam pro­file mea­sure­ment with rest gas ion­iza­tion elec­trons has re­mained largely un­changed since the tech­nique was first pro­posed in the late 1960¿s. Ion­iza­tion elec­trons (or ions) are trans­ported by an elec­tro­sta­tic field onto an imag­ing de­tec­tor, where the spa­tial dis­tri­b­u­tion of de­tected elec­trons is a di­rect mea­sure of the trans­verse beam pro­file. The de­tec­tor typ­i­cally con­sists of one or more Mi­cro-Chan­nel Plates (MCP’s) to am­plify the sig­nal, fol­lowed by ei­ther a phos­phor screen and cam­era, or pickup elec­trodes. A long-stand­ing prob­lem is the age­ing of the MCP’s, which lim­its the ac­cu­racy of the beam pro­file mea­sure­ment. A new tech­nique to de­tect ion­iza­tion elec­trons has been de­vel­oped at CERN, which uses a hy­brid pixel de­tec­tor to de­tect sin­gle ion­i­sa­tion elec­trons. This al­lows the ap­pli­ca­tion of count­ing sta­tis­tics to the beam pro­file mea­sure­ment. It will be shown that a mean­ing­ful beam pro­file can be ex­tracted from only 100 elec­trons. Re­sults from the new in­stru­ment will be pre­sented, which demon­strate the abil­ity to mea­sure the beam pro­file of sin­gle bunches turn-by-turn, which of­fers new op­por­tu­ni­ties for beam di­ag­nos­tic in­sights.
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Conference IBIC2019
Series International Beam Instrumentation Conferenc (8th)
Location Malmö, Sweden
Date 08-12 September 2019
Publisher JACoW Publishing, Geneva, Switzerland
Editorial Board Volker RW Schaa (GSI, Darmstadt, Germany); Andreas Jansson (ESS, Lund, Sweden); Thomas Shea (ESS, Lund, Sweden); Johan Olander (ESS, Lund, Sweden)
Online ISBN 978-3-95450-204-2
Online ISSN 2673-5350
Received 03 September 2019
Accepted 08 September 2019
Issue Date 10 November 2019
DOI doi:10.18429/JACoW-IBIC2019-TUBO04
Pages 257-260
Copyright
Creative Commons CC logoPub­lished by JACoW Pub­lish­ing under the terms of the Cre­ative Com­mons At­tri­bu­tion 3.0 In­ter­na­tional li­cense. Any fur­ther dis­tri­b­u­tion of this work must main­tain at­tri­bu­tion to the au­thor(s), the pub­lished ar­ti­cle's title, pub­lisher, and DOI.