Abstract
We built and tested a new electron beam generator that is capable of generating a 66 cm diameter annular intense relativistic electron beam of energy of 450 keV and current of 60 kA. The new generator incorporates a coaxial-to-triaxial mode converter which allows us to generate and (in the future) to propagate the electron beam between two coaxially grounded conductors. We designed the beam transport system to minimize the axial magnetic energy needed to confine the electron beam. An even lower impedance device can be built by scaling up the size, generating a higher electron beam current. This beam geometry (sheet beam) is useful for efficient generation of high power microwaves.
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