Experimental study of a THz band double-beam gyrotron

In this paper, we present the preliminary results of an ongoing experimental study of a novel double-beam gyrotron, which has been designed to operate in CW regime on the second harmonic of the cyclotron resonance with a frequency of 0.79 THz. A number of fundamental and second harmonic modes can be excited in the frequency range 0.3–0.8 THz. The observed output power levels of the order of several tens watt are available at the second harmonic of cyclotron resonance for application of this tube as a powerful radiation source for a high-field 1.2 GHz, proton DNP-NMR spectroscopy.