Abstract
Summary form only given. Pierce type convergent electron guns are the unique choice for linear beam microwave tubes. As a general practice for the design of these electron guns based on four electrical parameters, e.g. beam voltage (V), beam current (I), beam minimum diameter or beam waist (2r/sub w/) and cathode emission current density (J/sub c/), an initial estimation of the electron gun geometry including half beam cone angle (/spl theta/), axial gap between cathode and anode (Z/sub ac/), axial location of beam waist with respect to cathode (Z/sub w/), etc., is done through the synthesis approach. Then, the gun geometry thus obtained is fed as input into analytical software for the final design and optimisation of the electron gun geometry. A thorough study related to synthesis and analysis of electron guns has been carried out by the authors. In this abstract, a sensitivity analysis of different parameters of Pierce electron guns with respect to two basic input parameters like beam perveance (/spl mu/P) and beam waist radius (r/sub w/) has been presented.
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