The experimental investigations of dro-orbictron in 8-MM waveband

The experimental researches of DRO-orbictron mainly confirmed the conclusions of theoretical researches and showed perspective of the use in DRO resonance matching method of double grating with the ORS-field. The placing of double grating on the bottom of the matching groove gives the opportunity in substantially decreasing of ORS-mirrors aperture, and we can excite in the ORS only the basic TEM_00q-modes. The increasing of efficiency for energy exchange between an electron beam and resonance field in DRO-orbictron is caused by gathering of the resonance field to the width of matching groove and do not accompanied by the growth of ohmic losses in a resonator. At the choice of the matching groove height to b ≈ 0,75λ the width of one-mode frequency tuning for DRO-orbictron exceeds 5,5%, and the output power arrives P = 10Watt at the beam current I_a = 130mA and the accelerating voltage U_a = 2,9 kV. The carried-out experimental researches of DRO-orbictron showed a perspective of use the given ORS in short-wavelengths DRO.