Expert System for Control of Plasma, Beam and Wave Dynamics in Microwave Tubes.
Abstract
Three major subsystems were developed for a klystron expert system. These subsystems monitor and control the cathode temperature, the rf input response, and the rf output response. For the temperature controlled cathode subsystem, a Fortran code was developed to predict the steady state cathode temperature from transient heater voltage data. For the rf-input subsystem, a circuit having two simultaneously variable geometry adjustments was developed. This circuit symmetrizes the frequencies of and maintains the amplitude of the rf signal at the input cavity. A newly developed expert system software package successfully demonstrated adjustments of this circuit. A lumped element model of a two cavity extended interaction output cavity was developed and used to successfully predict the measurements on a two cavity cold test model. This circuit model is ready for use in a large signal two gap interaction code. A one gap large signal interaction code was written The code includes relativistic effects, velocity and density modulations, space charge effects, potential energy changes and dynamic beam loading.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 20, 1995
- Accession Number
- ADA298878
Entities
People
- H. Bacher
- J. Siambis
- R. Begum
- Robert F. Rogers
- T. A. Hargreaves