Gain Analysis of the FEL Using a Geometrically Focusing Permanent-Magnet Undulator

    Authors

    Y. Tsunawaki; N. Ohigashi; T. Okazaki; K. Mima; S. Kuruma; S. Sato; K. Imasaki; S. Nakai;L. R. Elias

    Comments

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    Keywords

    Electron; Instruments & Instrumentation; Nuclear Science & Technology; Physics, ; Particles & Fields; Spectroscopy

    Abstract

    The propagation properties of electron beams have been studied on undulators consisting of parabolic-shaped magnets and of alternately shifted magnets; this is the succession of work on undulators having circularly curved magnets or trapezoid/rhomboid shaped magnets. The gain of the FEL was also estimated for these geometrically focusing undulators by a one dimensional simulation code. It was found that for the circularly or parabolically curved undulator an electron beam propagating with a large divergence has a small gain, both positive and negative, due to the large amplitude deviation of the magnetic field of the undulator.

    Journal Title

    Nuclear Instruments & Methods in Physics Research Section a-Accelerators Spectrometers Detectors and Associated Equipment

    Volume

    331

    Issue/Number

    1-3

    Publication Date

    1-1-1993

    Document Type

    Article; Proceedings Paper

    Language

    English

    WOS Identifier

    WOS:A1993LK37800144

    ISSN

    0168-9002

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