Development of 50MW S-band klystron

This letter reports the development of a 50MW S-band klystron in the Institute of Electronics, Chinese Academy of Sciences (IECAS). It adopted a structure of six-cavity and single output window. Under conditions of an RF (Radio Frequency) pulse width of 4μs, a beam voltage of 305.9kV and a beam current of 368A, the peak output power has achieved 51.4MW with an efficiency of 45.6% and a gain of 54dB.