Recent results in generation of powerful pulses of 75GHz radiation at ELMI-device

The novel scheme of separation of the mm-wave radiation from the intense electron beam using planar Bragg wave transformer, is suggested and realized. In the experiments at the planar FEM with the new scheme of separation, the generation of powerful 4-mm radiation pulses was observed. The duration of these pulses is increased in two times in comparison with the old scheme of the beam dump and has reached 300ns. By means of the panel with neon lamps the angular distribution of the generated radiation at the exit of the maser is registered. The distribution of the luminescence intensity qualitatively agrees with the results of “cold” measurements and computer simulations.