Generation Of Low-Emittance Electron-Beams In Electrostatic Accelerators For Fel Applications

    Authors

    T. Chen;L. R. Elias

    Comments

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    Abbreviated Journal Title

    Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip.

    Keywords

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

    Abstract

    This paper reports results of transverse emittance studies and beam propagation in electrostatic accelerators for free electron laser applications. In particular, we discuss emittance growth analysis of a low current electron beam system consisting of a miniature thermoionic electron gun and a National Electrostatics Accelerator (NEC) tube. The emittance growth phenomenon is discussed in terms of thermal effects in the electron gun cathode and aberrations produced by field gradient changes occurring inside the electron gun and throughout the accelerator tube. A method of reducing aberrations using a magnetic solenoidal field is described. Analysis of electron beam emittance was done with the EGUN code. Beam propagation along the accelerator tube was studied using a cylindrically symmetric beam envelope equation that included beam self-fields and the external accelerator fields which were derived from POISSON simulations.

    Journal Title

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

    Volume

    354

    Issue/Number

    2-3

    Publication Date

    1-1-1995

    Document Type

    Article

    Language

    English

    First Page

    575

    Last Page

    583

    WOS Identifier

    WOS:A1995QE27100046

    ISSN

    0168-9002

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