Accelerator and Klystron (II) Developments of Klystron other than S-band for Accelerator and Struggles against the Oscillation

Abstract

Modern accelerators require the microwave technology and typical devices are klystrons. This article describes the developments of klystrons other than S-band, since developments of S-band klystron and linac were already described in the last volume of this journal. Recent progress of computer simulation enables us to manufacture tailored klystron mating with the accelerator having the desired frequency. Sometimes klystron engineers had to face to the difficulties involving the oscillations and instabilities, and spent a lot of efforts to solve them. In this article, such oscillation and instabilities which author experienced before are mentioned.