Abstract
Abstract The energy exchange between an electron beam and a gap in the presence of collisions is treated by means of a one-dimensional theory. The aim of the calculation i9 to discover the effect of collisions on the negative conductance known to occur for a certain range of gap lengths in the absence of collisions. A collision term is introduced phenomenologically into the equation of motion for the electrons and the small signal power theorem is also modified to take account of collisions. It is found that the effect of collisions is surprisingly small, a negative gap conductance still being obtained for collision frequencies as high as the plasma frequency.
Published Version
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