Requirements and limitations of the pulsed wire technique for measuring short-period long undulators’ magnetic field

Abstract The pulsed wire method is an attractive option to measure the magnetic field in insertion devices, mainly for those with restricted access (e.g., small gaps, in-vacuum/cryogenic environments, etc.). Besides first and second field integrals, experiments have proved the feasibility of reconst...

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Bibliographic Details
Published inJournal of physics. Conference series Vol. 2380; no. 1; pp. 12023 - 12028
Main Authors Baader, J. E., Casalbuoni, S.
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.12.2022
Subjects
Free electron lasers
Magnetic fields
Physics
Pulse duration
Storage rings (particle accelerators)
Synchrotron radiation
Wire
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Summary:Abstract The pulsed wire method is an attractive option to measure the magnetic field in insertion devices, mainly for those with restricted access (e.g., small gaps, in-vacuum/cryogenic environments, etc.). Besides first and second field integrals, experiments have proved the feasibility of reconstructing the magnetic field profile. Undulators with a small gap and short period are — and are planned to be — used at diffraction-limited storage rings and free-electron lasers. This contribution outlines the pulsed wire system’s requirements to perform magnetic field reconstruction in such undulators. We examine the main expected limitations, particularly the dispersive, finite pulse-width, discretization error, and sag effects. Furthermore, we present the current status of developing the pulsed wire system at the European XFEL.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/2380/1/012023