High-harmonic gyrotron with sectioned cavity

Bandurkin, I. V.; Kalynov, Yu. K.; Savilov, A. V.
July 2010
Physics of Plasmas;Jul2010, Vol. 17 Issue 7, p073101
Academic Journal
High-harmonic large-orbit gyrotrons require long-length operating cavities because of both a weak electron-wave coupling and relatively low electron currents. Since diffraction Q factors of such cavities are very high, a large fraction of the radiated power is dissipated in Ohmic losses. A sectioned klystronlike cavity can be a way to combine a long electron-wave interaction region with a relatively low diffraction Q factor. In this paper, a design of a third-harmonic terahertz gyrotron is studied in detail and discussed. As compared to a regular cavity, the use of a sectioned microwave system provides an enhancement of the output rf power by several times along with the halving of the Ohmic losses.


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