High-power ion beam generation with an inverse reflex tetrode

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Abstract
A new reflexing‐electron ion source is described. The device produces a unidirectional ion beam with relatively high efficiency even when the applied magnetic field exceeds the self‐field. This new source operates at a low, constant impedance during much of the applied voltage pulse and is better matched to available high‐power, low‐impedance generators than previous reflexing‐electron devices. Proton pulses with peak current ∼500 kA have been produced with the inverse reflex tetrode coupled to the Gamble II generator.