摘要

Nowadays there is no viable alternative for vacuum sources of continuous radiation in the THz range either of semiconductor lasers due to their low power (10⁻⁶ W), or among the lasers, which operate only at discrete frequencies. Among the existing vacuum sources of O-type the diffraction radiation oscillators (DRO) stand out for high frequency stability, narrow spectrum of the output signal, low noise and a wide range of electromechanical tuning and a relatively high level of output power. However, under the advancement in the THz range there is a problem of DRO efficiency increasing, that is connected with the need to ensure a high intensity of the high-frequency (HF) field in the region of electron-wave interaction. The use of klynotron effect is one of the ways to solve the problem. The using of klynotron effects to enhance the interaction efficiency of the electron beam with a HF field in the DRO is discussed in this paper. Experimental study of the klynotron effect carried out in the DRO with additional (deflection) electrode, as well as in DRO, when the electron beam is entered into the interaction space through dispersing bevels. It is shown that klynotron effects, the existence of which is due to non-removable fluctuations of the electron beam, accompany the interaction of the electron beam with the HF field. Increasing the electron beam utilization factor it is possible to reduce the starting current of the DRO, as well as, to obtain a higher generation power at low values of the magnetic focusing field.