High-energy high-efficiency phase-locked HPM magnetron for an array

We have developed a 60 MW, 60% efficient, 35 Joule/pulse secondary emission magnetron at S-band. We report on experimental results from this moderate voltage (120 kV), repetitively pulsed (10 Hz), injection locked (14 - 15 dB gain) magnetron. Results from particle-in-cell code computer simulations are presented which compare very well with the experiment when space-charge-limited emission is achieved. Experimental results from a proof-of-principle, low power (6 MW) two-magnetron array are also described.