Pulsed megawatt X-band klystron

Development of a broadband, long pulse, high power klystron at X-band is discussed. The electrical design, performance, and the construction of the tube are presented. The tube has a peak power output of 1.25 MW and an average power output of 6 KW. Bandwidth of the tube is 4 percent with a maximum power variation of 1 db. A seven cavity stagger-tuned tube was developed in order to realize 47 db large signal gain and 4 percent bandwidth. The correlation between the expected performance and theactual performance will be noted. The mechanical design of the tube and the method of assembly will be discussed. A number of window designs and materials were investigated for handling the high r-f voltage gradients at the output.