Performance of Rocketdyne phase-optimized pure permanent magnet undulator

Preliminary results of magnetic measurements of a high-field, pure permanent magnet undulator are presented. A two-step optimization process, using simulated annealing, was applied to reduce the RMS field error and to minimize RMS phase shake, trajectory walkoff, and integrated dipole and multipole field errors by optimally arranging the magnets. The field-terminating end module design is a novel implementation of Halbach's displacement-free termination scheme. Simulations of entry/exit trajectories for this termination are compared to trajectories computed from field measurements.<
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