Elliptically polarizing insertion devices at BESSY II

Two APPLE II type twin undulators are installed at BESSY II. They can either be operated in a chicane mode providing variable polarization at high switching rates or in a combined mode using a modulator for phase adaption. Studies on magnet block inhomogeneities have started to further improve the f...

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Bibliographic Details
Published in:Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment Accelerators, spectrometers, detectors and associated equipment, 2001-07, Vol.467 (1), p.21-29
Main Authors: Bahrdt, J., Frentrup, W., Gaupp, A., Scheer, M., Gudat, W., Ingold, G., Sasaki, S.
Format: Article
Language:English
Subjects:
ADVANCED PHOTON SOURCE
BEAM INJECTION
BESSY STORAGE RING
Double undulator
ELLIPTICAL CONFIGURATION
Elliptically polarizing undulators
Magnet block inhomogeneities
PARTICLE ACCELERATORS
POLARIZED BEAMS
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Summary:Two APPLE II type twin undulators are installed at BESSY II. They can either be operated in a chicane mode providing variable polarization at high switching rates or in a combined mode using a modulator for phase adaption. Studies on magnet block inhomogeneities have started to further improve the field quality and to reduce the effort on shimming.
ISSN:0168-9002
1872-9576
DOI:10.1016/S0168-9002(01)00554-X