INVESTIGATION OF LARGE-SIGNAL TRAVELING-WAVE TUBES.
Quarterly progress rept. no. 4,
MICHIGAN UNIV ANN ARBOR ELECTRON PHYSICS LAB
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Further work on the digital computer program for solution of nonlinear phenomena in traveling-wave devices and klystrons is described. Some computational difficulties have been eliminated. A different formulation is presented for eliminating certain difficulties in the solution of the Boltzmann-Vlasov equation used in the analysis of large-signal phenomena in multistream microwave devices. Performance data of the step-tapered traveling-wave tube is presented. Comparison is made with a uniform tube and other phase velocity tapered tubes. Representative results for several electron guns analyzed by digital computer programs are shown in the form of trajectory plots and current density curves. Details of program modifications are also presented. The results obtained from a low-noise, high-power amplifying chain are summarized. Suggestions for future work are made. Some additional data on the magnetron injection gun is given in this report. It is shown that further testing will be necessary before a definite conclusion can be made. Author