Abstract
High current pulsed electron accelerators operate with beam currents exceeding 1 kA, pulse lengths from 20 ns to 1 μs, and output energies up to 50 MeV. Potential applications include pulsed radiography, intense microwave generation, free electron laser drivers, directed energy for defense, and industrial radiation processing applications. This paper gives a tutorial on the principles of high current electron accelerators. It is divided into four sections: (a) high current sources, (b) space charge dominated extractors, (c) beam transport with strong self-fields, and (d) methods of high power acceleration. In addition to discussions of conventional technology, such as the linear induction accelerator, promising new approaches to beam generation and acceleration are outlined. These include laser driven photocathodes, ion channel focusing, and high power rf accelerators.
Published Version
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