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A novel insertion device for circularly polarized radiation.

T Tanaka, H Kitamura

    Journal of Synchrotron Radiation
    |July 1, 1997
    PubMed
    Summary
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    A new device using two helical undulators generates circularly polarized radiation across a broad energy range. This novel design produces higher harmonics and maintains high polarization, even with beam emittance variations.

    Area of Science:

    • Physics
    • Accelerator Science
    • Optics

    Background:

    • Circularly polarized radiation is crucial for advanced scientific research.
    • Existing undulator devices have limitations in energy range and polarization control.

    Purpose of the Study:

    • To propose and analyze a novel insertion device for generating circularly polarized radiation.
    • To achieve a wide available energy range and high polarization degree.

    Main Methods:

    • Design of a novel insertion device comprising two helical undulators with differing period lengths.
    • Analysis of the generated radiation properties, including spectral content and polarization.

    Main Results:

    • The proposed device produces circularly polarized radiation over a wide energy spectrum.

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  • Higher harmonics are observed in the generated radiation, a feature absent in ordinary helical undulators.
  • High degrees of circular polarization are maintained even for finite beam emittance.

    • Conclusions:

    • The novel two-undulator device offers a significant advancement for generating tunable, circularly polarized radiation.
    • This technology has potential applications in various fields requiring high-quality polarized beams.