RT Journal Article ID 0e1c3c5c4e04ca51 A1 Kulish, V. V. A1 Lysenko, A. V. A1 Koval, V. V. T1 CUBIC-NONLINEAR THEORY OF A PLASMA-BEAM SUPERHETERODYNE FREE ELECTRON LASER WITH H-UBITRON PUMPING JF Telecommunications and Radio Engineering JO TRE YR 2010 FD 2011-02-12 VO 69 IS 20 SP 1859 OP 1869 K1 electromagnetic radiation K1 free electron laser K1 plasma-beam instability AB The multi-harmonic cubic-nonlinear theory of a plasma-beam superheterodyne free electron laser with H-ubitron pumping is developed. The multi-harmonic interaction of waves, which plays an essential role, is considered. The analysis of the saturation levels is performed. It is found that prospects of practical use of the considered systems for generation of especially powerful electromagnetic signals of the mm-wave band could be rather promising. PB Begell House LK https://www.dl.begellhouse.com/journals/0632a9d54950b268,612bc68b44177d02,0e1c3c5c4e04ca51.html