STUDY OF HIGH POWER ELECTROSTATICALLY FOCUSED KLYSTRONS
Abstract
The report covers a program of experimental study to establish the feasibility of employing higher perveance beams in ESFK's, which together with other broadband techniques (filter, extended interaction cavity) would lead to ten percent bandwidth. In order to keep the tube design as simple as possible, the program was undertaken only to study the feasibility of employing higher beam perveances in ESFK's. In addition to the experimental study, further theoretical studies were made on a triple-gap extended interaction cavity leading to a 1 MW peak power C-band klystron with ten percent bandwidth. Studies of beam power and perveance limits for ESFK's were made. An improved method was developed for calculating small-signal gain of ESFK's which accounts for the effect of the electrostatic field of the lens on the electron bunching process. During the program, one beam tester and one electrostatically focused klystron were built. By utilizing very low perveances (0.0000008 A/V to the 3/2 power) efficiencies of up to 43 percent were achieved. By increasing the perveance to 0.0000015 A/V to the 3/2 power the efficiency dropped to 36 percent. Beam perveances higher than approximately 0.00000175 A/V to the 3/2 power do not appear useful in ESFK's.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1967
- Accession Number
- AD0662070
Entities
People
- T. H. Luchsinger
- W. R. Day