Baseline Cavity Design for Cornell's Energy Recovery Linac

This paper discusses the baseline superconducting RF cavity design to be used in Cornell’s Energy Recovery Linac, a next generation light source. We discuss the methods used to obtain the design and present the cavity’s figures of merit. The baseline cavity design is ready for prototyping, which will begin in the fall of 2010. Finally, we introduce small variations in the center cell design to increase the threshold current through the cavity by increasing the higher order mode relative frequency spread in the main linac, that have the effect of more than doubling the threshold current to 450 mA