Measurement of Deflection-Mode Damping in an Accelerating Structure

E CHOJNACKI,W GAI,C HO,R KONECNY,S MTINGWA,J NOREM,M ROSING,P SCHOESSOW,J SIMPSON

Journal of Applied Physics（1991）

ARGONNE NATL LAB

Cited 41|Views11

Abstract

We have directly measured the damping of wake-field deflection modes in a slow-wave accelerating structure consisting of a dielectric-lined waveguide with segmented conducting boundaries wrapped with rf absorbing material. Such damping of deflection modes is desired to prevent beam breakup instabilities. Attenuation e-folding times of 246 ps were recorded for deflection modes at the Advanced Accelerator Test Facility while the quality of the desired accelerating mode remained unaffected.

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