Absorption of waves excited by electron beam in magnetized plasma with longitudinal inhomogeneous density

Obtained experimental results confirm the concept of two-dimensional transformation of cold plasma waves into plasma oscillations in the lines ω approximately equal to ωsubp, where ω is froquency of electron-excited wave, and ωsubp is electron plasma frequency. Efficiency of Cherenkov absorption of oscillations is sufficiently high in this range. Energy transfer from a beam to plasma oscillations is observed to increase in a plasma with a longitudinal density gradient