Permanent magnet steerers for canted undulators at the ESRF

Permanent magnet steerers for canted undulators at the ESRF

A number of canted undulators will be installed at the ESRF. Permanent Magnet Steerers will be used for providing canting angles up to 5.4 mrad. These steerers have been optimized in view of the limited space available and the required field quality. The magnetic interaction between the steerers and...

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Veröffentlicht in:Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment Accelerators, spectrometers, detectors and associated equipment, 2012-02, Vol.664 (1), p.214-222
Hauptverfasser: Le Bec, G., Chavanne, J.
Format: Artikel
Sprache:eng
Schlagworte:
Accelerators
Canted undulator
Filing
Homogeneity
Iron
Magnetic fields
Optimization
Optimized pole profile
Permanent magnet steerer
Permanent magnets
Poles
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Beschreibung
Zusammenfassung:A number of canted undulators will be installed at the ESRF. Permanent Magnet Steerers will be used for providing canting angles up to 5.4 mrad. These steerers have been optimized in view of the limited space available and the required field quality. The magnetic interaction between the steerers and the undulators may lead to additional optical phase errors: auxiliary poles have been added to obtain a fast decrease of the fringe field. The transverse homogeneity of the magnetic field integral is another strong design constraint. Good homogeneity was reached by optimizing the profiles of the iron poles. Eight steerers have been constructed and magnetic measurements have been performed.
ISSN:0168-9002
1872-9576
DOI:10.1016/j.nima.2011.10.057