Author: Minty, M.G.
Paper Title Page
WE1A02
 CBETA, a 4-turn ERL Based on SRF Linacs and Permanent Magnet Beam Transport  
 
  • G.H. Hoffstaetter, N. Banerjee, J. Barley, A.C. Bartnik, I.V. Bazarov, D.C. Burke, J.A. Crittenden, L. Cultrera, J. Dobbins, F. Furuta, R.E. Gallagher, M. Ge, C.M. Gulliford, B.K. Heltsley, R.P.K. Kaplan, V.O. Kostroun, Y. Li, M. Liepe, W. Lou, J.R. Patterson, P. Quigley, D.M. Sabol, D. Sagan, J. Sears, C.H. Shore, E.N. Smith, K.W. Smolenski, V. Veshcherevich, D. Widger
    Cornell University (CLASSE), Cornell Laboratory for Accelerator-Based Sciences and Education, Ithaca, New York, USA
  • J.S. Berg, S.J. Brooks, C. Liu, G.J. Mahler, F. Méot, R.J. Michnoff, M.G. Minty, S. Peggs, V. Ptitsyn, T. Roser, P. Thieberger, D. Trbojevic, N. Tsoupas, J.E. Tuozzolo, F.J. Willeke, H. Witte
    BNL, Upton, Long Island, New York, USA
  • D. Jusic
    Cornell University, Ithaca, New York, USA
  
  A col­lab­o­ra­tion be­tween Cor­nell Uni­ver­sity and Brookhaven Na­tional Lab­o­ra­tory has de­signed a novel ac­cel­er­a­tor and is con­struct­ing it at Cor­nell: CBETA, the Cor­nell-BNL ERL Test Ac­cel­er­a­tor. The ERL tech­nol­ogy that has been pro­to­typed at Cor­nell for many years is being used, in­clud­ing a DC elec­tron source and an SRF in­jec­tor Linac with world-record cur­rent and nor­mal­ized bright­ness in a bunch train, a high-cur­rent linac cry­omod­ule op­ti­mized for ERLs, a high-power beam stop, and sev­eral di­ag­nos­tics tools for high-cur­rent and high-bright­ness beams. BNL has de­signed a multi-turn ERL and a re­cir­cu­lat­ing linac for eRHIC; in both de­signs the beam is trans­ported many times around the 4 km long RHIC tun­nel. The num­ber of trans­port lines is min­i­mized by using two arcs with Fixed Field Al­ter­nat­ing Gra­di­ent de­sign. This tech­nique will be tested in CBETA, which has a sin­gle re­turn for the 4-beam en­er­gies with strongly-fo­cus­ing per­ma­nent mag­nets of Hal­bach type. The high-bright­ness beam with 150 MeV and up to 40 mA will have ap­pli­ca­tions for Elec­tron Ion Col­lid­ers (EICs), e.g. for their elec­tron cool­ing, and for ap­pli­ca­tions in in­dus­try, in nu­clear physics, and in X-ray sci­ence.  
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