DEVELOPMENT OF A PULSED-MICROWIGGLER SYSTEM

Pulsed microwigglers can develop unusually high magnetic fields with s hort periods. They find potential applications in compact systems that use low energy accelerators that can generate very bright electron be ams, and in systems that lase on high harmonics of the fundamental fre quency. In the past many of the unique properties of pulsed wigglers h ave been addressed. In this paper we will concentrate on our solutions to the practical problems that must be solved to make such a device w ork. Among other topics we will discuss the following: achieving adequ ate precision in fabrication; controlling quadrupole fields; ''trimmin g'' the field after fabrication; providing structural support, cooling , and vacuum; and coupling to the pulsed power supply. Completed micro wigglers of our design will be installed in an FEL this summer to lase on the fundamental in the red part of the spectrum and on the third h armonic in the ultraviolet.