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Proceedings Paper

Feedback induced chaotic transitions in crossed-field devices
Author(s): Spilios Riyopoulos
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Paper Abstract

The recirculating hub charge causes nonlinear feedback between the input and the output in Crossed-Field Amplifiers. By varying some control parameters, such as the secondary emission coefficient or the recirculating charge fraction, the operation exhibits transitions from steady state, to limit cycles and finally to unpredictable (chaotic) behavior. The amplifier dynamics is described by a truncated system of fluid equations following guiding center trajectories1. Numerical integration of these equations yields very good agreement with experimental results, while reducing the computation time by three orders of magnitude compared to particle simulations. A pass-to-pass map is employed to investigate whether the chaotic transitions in CFAs follow the 'universal' rout to chaos for nonlinear-dissipative systems.

Paper Details

Date Published: 1 October 1991
PDF: 1 pages
Proc. SPIE 1576, 16th International Conference on Infrared and Millimeter Waves, 157605 (1 October 1991); doi: 10.1117/12.2297718
Show Author Affiliations
Spilios Riyopoulos, Science Applications International Corp. (United States)

Published in SPIE Proceedings Vol. 1576:
16th International Conference on Infrared and Millimeter Waves
Minh Quang Tran, Editor(s)

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