A compact high-current circular microtron has been developed, This mic
rotron is operated with the Russian second type of acceleration to red
uce its size and has an electron gun outside the accelerating cavity t
o increase the beam current, The uniform magnetic field is about 0.19
T, and the energy gain per orbit is about 0.9 MeV. The beam current at
a microwave power of 2.2 MW is 200 mA at 4 MeV and 80 mi at 9.5 MeV.