RECENT ACHIEVEMENTS AND FUTURE PROSPECT OF ID ACTIVITIES AT THE ESRF

Abstract

The latest developments concerning Insertion Devices at the ESRF are presented. These concern the operation of a 5m long undulator at a gap of 11 mm providing a brilliance close to 5 10 20 phot/sec/.1%/mm 2 /mr 2 . A 1.6-m long in-vacuum undulator is operated at a 5-mm gap. Four 2-m long in-vacuum undulators are currently being manufactured. Three Apple II undulators are undergoing field measurements. The computation of the reduction of dynamic aperture induced by the Apple II undulator is presented together with its correction by a new type of shimming. A second quasi-periodic undulator has been installed, its spectral characteristics are close to expectations.