A Comparison of Triodes and Klystrons for Particle Accelerator Applications

In the frequency range between 200 and 1200 mcs, it is possible to use either klystrons or triodes for particle accelerator applications. This paper analyzes the bases of choice between these tube types from a systems point of view. It treats development status, initial and operating costs, reliability, system complexity, and all pertinent technical factors. The tentative specifications of the proton linear accelerator r-f system proposed by Los Alamos are used as a basis for comparison, and the conclusions reached on this system are extrapolated to higher and lower frequencies. It is concluded that either triodes or klystrons can be used in most, if not all, applications and that in almost every significant respect, in the frequency range considered, the klystron system is superior to the triode system.