In the past couple years, we have been working on several undulator-related projects at SLAC, in addition to planning LCLS-II. We have been doing radiation damage studies on LCLS undulators. I will show the repeatability of our reference undulator measurements and how undulators coming back from LCLS show small decreases in K. This effort is being used to specify collimation requirements for LCLS-II. We also built the Delta undulator which uses the microbunched beam from LCLS to produce elliptically polarized light. This summer we will rebuild the Delta attempting to reduce assembly errors and measurement errors enough to meet FEL type tolerances. I will also talk about the design of the Delta undulator's phase shifter and the use of its magnet structure design for the LCLS-II phase shifters.
