Mechanical design and fabrication of PLS S-band klystron

The prototype of PLS Linac klystron tube operating at 2856 MHz is under development by PAL. The self-design process for the klystron components are initiated with the results of the regeneration experience of failed klystron tubes at PLS Linac. The klystron components comprise of a thermionic electron gun, the segmented main accelerating cavity structures including RF input coupler and output voltage waveguide, a collector and two RF windows. The design utilizes a relatively proven technological approach for the klystron tubes currently in use, and the fabrication process using high precision machining and novel joining techniques are applied. The mechanical design considerations and manufacturing details of the PLS S-band klystron are presented.