Performance criteria transformation energy of electron beam in microwave energy for klystron’s type devices

In presently publication using method of nonlinear similarity the general regularity of behaviour for klystron and klystrode electron efficiency from space charge parameter (form-factor) was determined. This dependence described by a simple universal form - using the circle equation. This equation allows for sure (in comparison with well-known empiric obtained evaluations) predicts klystronpsilas efficiency for different filling factors and electron beam radii taking into account all features nonlinear behaviour electron efficiency to perveance.