Abstract. The
main attention of this paper is paid to the three-dimensional modeling of the
dynamics of sheet electron beam in cyclotron wave converter (CWC) and to
evaluation of its efficiency and power characteristics. Sheet electron beam
propagation was analyzed in Cuccia – type resonator and in the region of
reversal change of focusing magnetic field. The method of "particle in a
cell" with beam current limitation by a spatial charge field was used
during analysis of excitation of cyclotron rotation of the beam. The results
of computer simulation were obtained taking into account Maxwell velocity
distribution of emitted electrons, as well as the thermal losses of microwave power
in the conducting walls of the resonator. The original design of the Cuccia –
type resonator with transverse electric field was presented. It was found that
the efficiency of power exchange with sheet electron beam in the resonator may
exceed 90%. The longitudinal velocities of electrons can remain
mono-energetically at the output of the resonator. Dynamics of sheet electron
beam in the reversal change of the magnetic field was analyzed using the method
of large particles and original multi-period 3D model of electron beam. It was
found that the efficiency of rotational beam power conversion into longitudinal
beam motion may exceed 80%, as well as the total efficiency of conversion of
the microwave power into DC power can reach 75%. The value of the continuous-wave
HF power been converted can reach 150 kW.
Key words: sheet electron beam, cyclotron wave converter, 3D simulation, electron
gun, resonator, collector.
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