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TY - CONF AU - Bogacz, S.A. AU - Benesch, J.F. AU - Berg, J.S. AU - Bodenstein, R.M. AU - Brooks, S.J. AU - Douglas, D. AU - Gamage, B.R. AU - Hoffstaetter, G.H. AU - Krafft, G.A. AU - Morozov, V.S. AU - Roblin, Y. AU - Trbojevic, D. ED - Liu, Lin ED - Byrd, John M. ED - Neuenschwander, Regis T. ED - Picoreti, Renan ED - Schaa, Volker R. W. TI - 20-24 GeV FFA CEBAF Energy Upgrade J2 - Proc. of IPAC2021, Campinas, SP, Brazil, 24-28 May 2021 CY - Campinas, SP, Brazil T2 - International Particle Accelerator Conference T3 - 12 LA - english AB - A proposal was formulated to increase the CEBAF energy from the present 12 GeV to 20-24 GeV by replacing the highest-energy arcs with Fixed Field Alternating Gradient (FFA) arcs. The new pair of arcs would provide six or seven new beam passes, going through this magnet array, allowing the energy to be nearly doubled using the existing CEBAF SRF cavity system. One of the immediate accelerator design tasks is to develop a proof-of-principle FFA arc magnet lattice that would support simultaneous transport of 6-7 passes with energies spanning a factor of two. We also examine the possibility of using combined function magnets to configure a cascade, six-way beam split switchyard. Finally, a novel multi-pass linac optics based on a weakly focusing lattice is being explored. PB - JACoW Publishing CP - Geneva, Switzerland SP - 715 EP - 718 KW - linac KW - booster KW - lattice KW - optics KW - emittance DA - 2021/08 PY - 2021 SN - 2673-5490 SN - 978-3-95450-214-1 DO - doi:10.18429/JACoW-IPAC2021-MOPAB216 UR - https://jacow.org/ipac2021/papers/mopab216.pdf ER -