Russian gyrotrons of MW power level in MM frequency band
2013
Modern high power gyrotron is capable to generate RF radiation of a power up to (1-1.5) MW with total efficiency of (45-60)% at a frequency range of (30-170) GHz in quasi-CW regime providing pulse duration up to 1000 s. These unique parameters can be achieved first of all due to effective interaction of stable helical electron beam transported through oversized cylindrical resonator in a strong magnetic field and adequate cooling of all heated surfaces inside tube. Gyrotron is rigged with such important components as depressed collector, high-efficient built-in quasi-optical converter of high-order operating resonator mode into paraxial wave beam, and output window with disc of CVD diamond. All these elements aimed to decrease power dissipation inside tube, and thus make long pulse/CW/1MW operation of gyrotron reliable enough.
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