Abstract
We study the influence of the thermal spread in ejection velocities of secondary electrons on the initial stage of development of a two-sided multipactor. The analysis employs a statistical method based on an exact analytical solution for the electron distribution function over times of transit through the vacuum gap. The obtained theoretical relations are used as the basis for a numerical algorithm which takes into account both the angular and energy distributions of secondary electrons and makes it possible to calculate quantitatively the main multipactor characteristics for the actual dependence of the secondary-emission ratio of the walls on the energy of bombarding electrons. Detailed numerical calculations of the multipactor zones are presented. It is shown that the presence of angular anisotropy can change significantly the conditions of production of the secondary-emission discharge as compared with the case of isotropic emission.
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