Beam Handling And Emittance Control

J. R. Thompson; M. L. Sloan; J. R. Uglum; B. N. Moore

doi:10.1117/12.951827

25 July 1989 Beam Handling And Emittance Control

J. R. Thompson, M. L. Sloan, J. R. Uglum, B. N. Moore

Proceedings Volume 1061, Microwave and Particle Beam Sources and Directed Energy Concepts; (1989) https://doi.org/10.1117/12.951827
Event: OE/LASE '89, 1989, Los Angeles, CA, United States

Abstract

Image charge electric fields can produce large cumulative erosion of the brightness of a high current electron beam during transport through successive high-gradient accelerating gaps. However, this erosion in beam brightness may be significantly reduced through the use of smoothly shaped, impedance-matched accelerating gaps with optimized gap-to-gap spacing. Moreover, for beams transported with solenoidal magnetic focusing, it is possible to spatially tune the solenoidal field within the accelerating gaps to compensate the image charge perturbations. Calculations suggest.that with such techniques it is possible to deliver from a multi-gap accelerator, high current beams whose diode brightness is essentially preserved during transport and acceleration. If disruptive, high current beam kinking instabilities are also controlled, such high-brightness beams are uniquely capable of driving high performance FEL operation at wavelengths in the infrared and below.

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J. R. Thompson, M. L. Sloan, J. R. Uglum, and B. N. Moore "Beam Handling And Emittance Control", Proc. SPIE 1061, Microwave and Particle Beam Sources and Directed Energy Concepts, (25 July 1989); https://doi.org/10.1117/12.951827

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