M. Yu. Glyavin, V. Yu. Zaslavsky, I. V. Zotova, V. N. Manuilov, A. P. Fokin,
https://link.springer.com/article/10.1007/s11141-019-09981-y
We study theoretically the possibilities of double-stage energy recuperation in a double-beam terahertz gyrotron. Numerical modeling, which was performed for a gyrotron producing radiation with a frequency of 0.78 THz and operating at the second cyclotron-frequency harmonic at the TE8.5 mode, demonstrates the possibility of spatial and energy separation of electron beams. This makes it possible to implement a double-stage recuperation scheme. The found energy spectra of electrons suggest an increase in the gyrotron efficiency by 3.5–4 times.
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