RT Journal Article ID 1ee418a312c0b4fa T1 On the Interaction between an Electron Beam and a Slow Electromagnetic Wave in an O -Type Oscillator JF Telecommunications and Radio Engineering JO TRE YR 2002 FD 2007-03-19 VO 57 IS 6-7 OP 9 AB The equation of an electron motion in a slow wave field with the constant amplitude and its approximate solution technique are considered on the basis of the solution expansion into power series by the small wave amplitude. It is shown that the most effective energy transfer mode from the beam to the wave always lies beyond the bounds of this approximation applicability. Thereby, this approximation is inapplicable for description of the oscillation modes having the efficiency factor close to the maximum possible. PB Begell House LK https://www.dl.begellhouse.com/journals/0632a9d54950b268,4492b37e4b204808,1ee418a312c0b4fa.html