DOE OSTI · 1825085
20-24 GeV FFA CEBAF Energy Upgrade
Abstract
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.
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Bogacz, Slawomir Alex, Benesch, J. F., Bodenstein, R. M., Gamage, B. R., Krafft, G. A., Morozov, V. S., Roblin, Y., Berg, J. S., Brooks, S. J., Trbojevic, D., Douglas, D., Hoffstaetter, G. H.. 2021-08-01. 20-24 GeV FFA CEBAF Energy Upgrade. https://doi.org/10.18429/jacow-ipac2021-mopab216
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