Cbn 08-2 Evaluation of the Low Cost Compact Ppm Planar Undulator Model

To evaluate a number of ideas, which, in principal, can be implemented in the ERL insertion devices design, we built and tested 30cm long pure permanent magnet (PPM) undulator model. The model had 25.4mm undulator period, 5mm fixed gap and ∼ 1.07T maximum peak field on the beam axes. For the field strength control was utilized the phase adjustment scheme in which magnetic arrays are moved longitudinal with respect to each other. Magnetic arrays consisted of NdFeB rectangular magnet blocks delivered ”off the shelf” by Stanford Magnet Company. The model magnetic field was adjusted ∗Work supported by the National Science Foundation under contract PHY 0202078 †Mail send to: A. Temnykh, Wilson Lab, Cornell University, NY 14850, USA. Tel. +1 607 255 4882, fax +1 607 255 8062, e-mail [email protected]