Wiggler improvement based on single axis magnetic measurement, synthesized 3-D field simulation of trajectories and sorting of lateral focusing magnets

H. S. Marks*, M. Volshonok, E. Dyunin, A. Gover, Y. Lasser, R. Shershevski, A. Yahalom

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

A method is presented for correcting magnetic field imperfections in an assembled wiggler of the Halbach configuration. The method is employed in a configuration in which lateral focusing is needed along the wiggler (at low beam energies and large length) and is provided by external magnet bars alongside the wiggler. Field deviations in both vertical and lateral dimensions due to wiggler imperfections are repaired by sorting and reassembly of the focusing magnets. A single Hall probe measurement along the wiggler axis and individual measurements of the focusing magnet bars provide sufficient data for sorting and optimal choice of the positions of the focusing magnets. Moreover, this data enables 3D simulation of the e-beam transport trajectories in the virtually synthesized field of the wiggler with the contemplated repair configuration of the focusing magnet bars before actually assembling them. It thus provides in advance a realistic prediction of the quality of the repair.

Original languageEnglish
Pages (from-to)15-21
Number of pages7
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume660
Issue number1
DOIs
StatePublished - 21 Dec 2011

Funding

FundersFunder number
Israeli Science Foundation353/09

    Keywords

    • Magnet Sorting
    • Optimization
    • Undulator
    • Wiggler

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