A Feasibility Study of Beam-Wave Interaction in 670 GHz Gyrotron for Radioactive Material Detection Application

Abstract

In this article, a feasibility study of 300 kW RF power generation with TE25,10 (transverse electric) operating mode for 670 GHz gyrotron is presented. The beam-wave interaction computation and power growth at fundamental harmonic are carried out by using the particle-in-cell code MAGIC. The beam current, beam voltage and magnetic field at cavity center are optimized for the efficient beam-wave interaction, which are 14 A, 70 kV, and 26.34 T, respectively. The parametric analysis is also carried out to provide the flexibility in the actual fabrication of the device. It is found that more than 300 kW power generation is possible at TE25,10 operating mode.

A 670 GHz gyrotron with record power and efficiency

“…It should be noted that similar results can be also achieved in a gyrotron operating in the TE 25,10 -mode, as shown in the design study described in Ref. 21.…”

The Gyrotrons as Promising Radiation Sources for THz Sensing and Imaging

“…In the subsequent studies on this technology, many important aspects (e.g., the sensitivity and the range of the sensing) have been investigated in detail, and the components of the system have been optimized [84][85][86]. Following the above-mentioned pioneering contributions, several other research groups worldwide have joined the work on this technique [87,88]. The experimental results obtained using a 0.095 THz gyrotron suggest that detection at distances as large as 1 km should be feasible using an appropriate antenna.…”