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Proceedings Paper

Beam Handling And Emittance Control
Author(s): J. R. Thompson; M. L. Sloan; J. R. Uglum; B. N. Moore
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Paper 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.

Paper Details

Date Published: 25 July 1989
PDF: 19 pages
Proc. SPIE 1061, Microwave and Particle Beam Sources and Directed Energy Concepts, (25 July 1989); doi: 10.1117/12.951827
Show Author Affiliations
J. R. Thompson, Austin Research Associates (United States)
M. L. Sloan, Austin Research Associates (United States)
J. R. Uglum, Austin Research Associates (United States)
B. N. Moore, Austin Research Associates (United States)

Published in SPIE Proceedings Vol. 1061:
Microwave and Particle Beam Sources and Directed Energy Concepts
Howard E. Brandt, Editor(s)

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