ERL UPGRADE OF AN EXISTING X-RAY FACILITY: CHESS AT CESR ∗

Cornell University has proposed an Energy-Recovery Linac (ERL) based synchrotron-light facility which can provide greatly improved X-ray beams due to the high electron-beam quality that is available from a linac. To provide beam currents competitive with ring-based light sources, the linac must operate with energy recovery, the feasibility of which we plan to demonstrate in a downscaled prototype ERL. Here we present two of several 5 GeV ERL upgrade possibilities for the existing 2nd generation light source CHESS at CESR. This proposed upgrade suggests how existing storage rings can be extended to ERL light sources with much improved beam qualities.

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