Author: Magan, M.
Paper Title Page
TUO1AB04 Current Status on ESS Medium Energy Beam Transport 170
 
  • I. Bustinduy, M. Magan, F. Sordo
    ESS Bilbao, Bilbao, Spain
  • R. Miyamoto
    ESS, Lund, Sweden
 
  The Eu­ro­pean Spal­la­tion Source, ESS, uses a high power lin­ear ac­cel­er­a­tor for pro­duc­ing in­tense beams of neu­trons. Dur­ing last year the ESS linac cost was reeval­u­ated, as a con­se­quence im­por­tant mod­i­fi­ca­tions were in­tro­duced to the linac de­sign that af­fected Medium En­ergy Beam Trans­port (MEBT) sec­tion. RFQ out­put beam en­ergy in­creased from 3 MeV to 3.62 MeV, and beam cur­rent under nom­i­nal con­di­tions was in­creased from 50 to 62.5mA. The con­sid­ered MEBT is being de­signed pri­mar­ily to match the RFQ out­put beam char­ac­ter­is­tics to the DTL input both trans­ver­sally and lon­gi­tu­di­nally. For this pur­pose a set of eleven quadrupoles is used to match the beam char­ac­ter­is­tics trans­ver­sally, com­bined with three 352.2 MHz CCL type buncher cav­i­ties, which are used to ad­just the beam in order to ful­fill the re­quired lon­gi­tu­di­nal pa­ra­me­ters. Fi­nally, thermo-me­chan­i­cal cal­cu­la­tions for ad­justable halo scrap­ing blades, with sig­nif­i­cant im­pact on the HEBT, will be dis­cussed.  
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