Abstract
A new type of plasma cathode for x-ray and electron beam generation has been demonstrated using a formed ferrite plasma source where a durable filament on the ferrite rod creates a large area of plasma surface as the electron source. Measured anode voltage-current relationships show the space-charge-limited operation with a high current density of 17 A/cm2 at 70 kV anode voltage during 2.5 μs. This source is promising for high repetition rate operation with a long life.
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