Insitumeasurements and numerical simulation of wavehyphen;electron interactions in a crossedhyphen;field amplifier

摘要

We report detailed twohyphen;dimensionalinsitumeasurements of electron density inside an injectedhyphen;beam crossedhyphen;field amplifier operating at 150 MHz. It is demonstrated that during amplification there is a spatial redistribution of the cycloidal electron beam as electrons are drawn to the anode. These measurements have been compared with a numerical simulation lsqb;G. E. Dombrowski, IEEE Trans. Electron. Devices35, 2060 (1988)rsqb; which predicts a change in electron trajectories but gives a larger electron loss than was measured.