Keyword: coupling
Paper Title Other Keywords Page
MO4C3 Development, Fabrication and Testing of the RF-Kicker for the Acculinna-2 Fragment Separator kicker, cavity, operation, experiment 37
 
  • W. Beeckman, F. Forest, O. Tasset-Maye, E.J. Voisin
    SIGMAPHI S.A., Vannes, France
  • A. Bechtold
    NTG Neue Technologien GmbH & Co KG, Gelnhausen, Germany
  • A.S. Fomichev, A.V. Gorshkov, S.A. Krupko, G.M. Ter-Akopian
    JINR/FLNR, Moscow region, Russia
 
  The Ac­culinna-2 ra­dioac­tive beam sep­a­ra­tor was de­signed and built be­tween 2012 and 2014, then in­stalled and tested by Sigmaphi in 2015 and in full op­er­a­tion since 2016 at the Flerov lab­o­ra­tory of JINR in Dubna. In order to achieve ef­fi­cient sep­a­ra­tion of neu­tron-de­fi­cient species, an RF kicker was fore­seen since the be­gin­ning of the pro­ject but was put on hold for many years. In 2016 Sigmaphi got a con­tract to study, build, in­stall and test an RF kicker with a vari­able fre­quency rang­ing be­tween 15 and 21 MHz and ca­pa­ble of pro­duc­ing 15kV/cm trans­verse elec­tric fields in a 10 cm gap over a 1m long dis­tance.# The pre­sen­ta­tion first re­calls the ra­tio­nale of an RF-kicker to sep­a­rate neu­tron-de­fi­cient species. It then goes through the dif­fer­ent steps of the study, ini­tial choice of the cav­ity struc­ture, first di­men­sion­ing from an­a­lyt­i­cal for­mu­las, fi­nite el­e­ments com­pu­ta­tions and tun­ing meth­ods en­vi­sioned, down to a final pre­lim­i­nary de­sign.# A 1/10 scaled mock-up of this final shape was built and tested as a check be­fore build­ing the full-size cav­ity. The NTG com­pany was then con­tracted to per­form, in a joint col­lab­o­ra­tion with Sigmaphi, the final study, de­tailed de­sign, con­struc­tion and fac­tory test­ing of the real cav­ity. The pre­sen­ta­tion high­lights the fab­ri­ca­tion and tests of both mock-up and real size cav­i­ties through a se­ries of pic­tures.# The com­plete RF-kicker, with its power sup­ply, con­trol and pump­ing sys­tems was in­stalled on the Ac­culinna-2 beam­line in June 2019. Be­cause the U400M cy­clotron was due to shut down by mid-2020, the Ac­culinna-2 team de­cided to use the sep­a­ra­tor to ac­cu­mu­late as much data as pos­si­ble, to be processed dur­ing the 2 years clos­ing time. A 1-week time win­dow for kicker test­ing was only avail­able in Feb­ru­ary 2020, a short but suf­fi­cient time lapse to suc­cess­fully drive the cav­ity at full power and test it over a wide fre­quency range. Un­for­tu­nately, be­cause of cy­clotron clo­sure, no beam tests have been per­formed so far. The lat­est avail­abl  
slides icon Slides MO4C3 [16.742 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-HIAT2022-MO4C3  
About • Received ※ 26 June 2022 — Revised ※ 10 August 2022 — Accepted ※ 15 September 2022 — Issue date ※ 29 September 2022
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)