A 30 period permanent magnet (SmCo5) undulator has been designed, built and tested. The period is 6.1 cm, overall length is 1.95 a, and the gap is variable from 2.7 cm to 6.0 ca. Magnetic aeasureaents at the aidplane with a 2.7 ca gap show that the field is sinu soidal with a peak value of .28 T. Construction de tails and magnetic aeasureaents are presented along with the spectral distribution of radiation produced by 3.0 GeV electrons traversing the undulator.

A wiqgler magnet with 27 period?, each 7 cat long which reaches 1.21 T at a 1.2 cm gap and 1.64 T at 0.8 cm gap has been designed and is in fabrication. Installation in SPEAR Is scheduled for mid 1983. This new wiggler will be the radiation source for a new high intensity synchrotron radiation beam line at SSR" The magnet utilizes rare-earth cobalt (REC) abt.er1al and steel 1n a hybrid configuration to achieve simul taneously a high magnetic field with a short period. The magnet Is external to a thin walled variable gap stainless steel vacuum chamber which is opened tc pro vide beam aperture of 1.8 cm gap at Injection and then closed to a smaller aperture (< 1.0 cm). Five indepen dent drive systems are provided to adjust the magnet and chamber gaps and alignment. Magnetic design, construction details and magnetic measurements are presented.

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