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The advantages of argon-ion-irradiated reticulated vitreous carbon (RVC) as a cold-cathode electron source are investigated in the context of a high current density, medium energy, low energy spread, high brightness electron gun.
An electrostatic- focused electron source with an Ar+-ion irradiated reticulated vitreous carbon (RVC) field-emission cathode is designed and simulated. The electron beam from a 1 mm emissive surface is focused to a 30 μm diameter spot, retaining low energy spread and high brightness, yet high total current, for application to phase-contrast x-ray imaging.
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