The multimode undulator that is able to produce polarized radiation of any
ellipticity operates successfully in Hiroshima Synchrotron Radiation Center
. The comparison between designed and achieved performance was made. Polari
zation measurements by using visible-U-V polarimeter show as high degree of
circular polarization as designed. The future plan of undulator operation
as an elliptical multipole wiggler is suggested. (C) 2001 Elsevier Science
B.V. All rights reserved.