The nuclear physics community has identified an upgrade of CEBAF to 12 GeV as one of its top priorities. The principal motivation is to enable meson spectroscopy with 9 GeV polarized photons. A plan for implementing the 12 GeV upgrade has been prepared. Subsystem designs are being tested. Additional opportunities to reduce total project costs have been identified and will be pursued. The plan now calls for the addition to CEBAF of 10 new high-performance cryomodules and a new recirculation arc, yielding 12 GeV after 5.5 passes through the accelerator. Formal construction start could be in 2005. The same cryomodule design would subsequently be the building block for an eventual upgrade to 24 GeV.

This work supported by the US Department of Energy under contract DE-AC05-84ER40150.

Authors: L. Harwood and C. Reece

Submitted for 2001 SRF Workshop, KEK, Tsukuba City, Japan, September 6-11, 2001

Updated August 10, 2001

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