Author: Lamaack, J.L.
Paper Title Page
MO3C04 A MTCA Based BPM-System for PETRA IV 19
 
  • G. Kube, H.T. Duhme, J.L. Lamaack, F. Schmidt-Föhre, K. Wittenburg
    DESY, Hamburg, Germany
  • A. Bardorfer, L. Bogataj, M. Cargnelutti, P. Leban, M.O. Oblak, P. Paglovec, B. Repič
    I-Tech, Solkan, Slovenia
  
  The PETRA IV pro­ject aims to up­grade the pre­sent PETRA III syn­chro­tron into an ultra low-emit­tance source. The small emit­tances trans­late di­rectly into much smaller beam sizes, thus im­pos­ing strin­gent re­quire­ments on the ma­chine sta­bil­ity. In order to mea­sure beam po­si­tions and con­trol orbit sta­bil­ity to the level of 10% of beam size and di­ver­gence, a high res­o­lu­tion BPM sys­tem will be in­stalled which con­sists of 788 in­di­vid­ual mon­i­tors with the read­out elec­tron­ics based on MTCA.4. In order to ful­fil the long-term drift re­quire­ment (< 1 mi­cron over 7 days), sev­eral ana­log, dig­i­tal and SW parts were taken from the Lib­era Bril­liance+ and a new RTM mod­ule has been de­vel­oped to be used as BPM elec­tron­ics RFFE. In ad­di­tion, its ana­logue RF switch ma­trix used for long-term sta­bi­liza­tion was sep­a­rated and placed close to the BPM pickup, hence en­abling an ad­di­tional sta­bi­liza­tion of the RF ca­bles. At pre­sent, a fully pop­u­lated MTCA crate with 6 AMC boards for the read­out of 12 BPMs is in­stalled at PETRA III and is ex­ten­sively being tested. This con­tri­bu­tion sum­ma­rizes the lat­est beam mea­sure­ments, demon­strat­ing the high per­for­mance of the BPM sys­tem and the ex­ter­nal sta­bi­liza­tion con­cept.  
slides icon Slides MO3C04 [3.604 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-IBIC2023-MO3C04  
About • Received ※ 06 September 2023 — Revised ※ 10 September 2023 — Accepted ※ 13 September 2023 — Issue date ※ 02 October 2023
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MOP021
 New Beam Position Monitor System for PETRA IV  
 
  • J.L. Lamaack
    University of Hamburg, Hamburg, Germany
  • A. Bardorfer, L. Bogataj, M. Cargnelutti, P. Leban, M.O. Oblak, P. Paglovec, B. Repič
    I-Tech, Solkan, Slovenia
  • H.T. Duhme, G. Kube, F. Schmidt-Föhre, K. Wittenburg
    DESY, Hamburg, Germany
  
  The PETRA IV pro­ject at DESY aims to up­grade the pre­sent syn­chro­tron ra­di­a­tion source PETRA III into a source of ul­tra-low emit­tance with tar­get emit­tance of 20 pmrad. The small beam emit­tance trans­lates di­rectly into much smaller beam sizes of about 7 mi­crons hor­i­zon­tally and 3 mi­crons ver­ti­cally at in­ser­tion de­vice source points, thus im­pos­ing strin­gent re­quire­ments on the ma­chine’s sta­bil­ity. In order to mea­sure beam po­si­tion and con­trol orbit sta­bil­ity to the re­quired level of ac­cu­racy, a high-res­o­lu­tion BPM sys­tem con­sist­ing of 790 in­di­vid­ual mon­i­tors will be in­stalled. Its read­out elec­tron­ics will be based on MTCA.4 as a tech­ni­cal plat­form. To ful­fill the long-term drift re­quire­ment (< 1 mi­cron over 7 days), the con­cept of cross­bar-switch­ing was ex­tended in such a way that the RF switch ma­trix is sep­a­rated from the read­out elec­tron­ics and placed as close to the BPM pickup as pos­si­ble, there­fore en­abling ad­di­tional sta­bi­liza­tion of the RF ca­bles. At pre­sent, a fully pop­u­lated MTCA.4 crate with 6 AMC boards for the read­out of 12 BPMs is in­stalled at PETRA III and ex­ten­sively tested. This con­tri­bu­tion sum­ma­rizes the lat­est mea­sure­ments of the long term sta­bil­ity.  
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