Numerical simulations of weakly relativistic large orbit gyrotron

In recent years considerable interest and attention has been focused on the theoretically appealing possibilities of increasing further both the power level and maximum frequency of radiation using new schemes of interaction in a variety of gyro-devices. One promising class of such relatively new tubes is the large orbit gyrotron (LOG). Although its advantages for high harmonic operation are well known and theoretically proved not only for the relativistic range of beam energy most of the efforts so far have been concentrated on LOG with strongly relativistic electron beams. In this respect, it is of great practical importance to consider the possibilities for development of an effective compact LOG operating with relatively low energy beams. In this paper we present a conceptual design study of such a prospective device.