DESIGN OF A LOCAL BUMP FEEDBACK-SYSTEM FOR A VARIABLY POLARIZING UNDULATOR

Authors
BIZEN T SHIMADA T TAKAO M HIRAMATU Y MIYAHARA Y
Citation
T. Bizen et al., DESIGN OF A LOCAL BUMP FEEDBACK-SYSTEM FOR A VARIABLY POLARIZING UNDULATOR, Journal of synchrotron radiation, 5, 1998, pp. 465-467
Citations number
3
Categorie Soggetti
Instument & Instrumentation","Physics, Applied",Optics
Journal title
Journal of synchrotron radiation → ACNP
ISSN journal
09090495
Volume
5
Year of publication
1998
Part
3
Pages
465 - 467
Database
ISI
SICI code
0909-0495(1998)5:<465:DOALBF>2.0.ZU;2-Q
Abstract
A local bump feedback system is under construction to correct the orbi t distortion caused by the magnetic field errors of a double-array und ulator used to generate linear and circular polarization of light for a soft X-ray beamline. The local bump orbit is created by steering coi ls several turns long and four sets of steering magnets. The kick angl e of the long steering coils and the steering magnets is determined ac cording to the motion of the undulator and by detecting the beam posit ion.