Propagation of a high-pressure microwave discharge in prebreakdown fields: Formation of plasma structures

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Abstract
A 3D model is developed, which describes the propagation of an initiated high-pressure microwave discharge in a linearly polarized wave beam. The equations for the electric field amplitude are solved self-consistently with the set of equations of plasmochemical kinetics. Plasma structures of the experimentally observed “snake” and “chain” types are obtained using this model. The calculation results enable one to determine the conditions of formation of one or another spatial structure, as well as the parameters of the plasmoids being formed. The results of calculation of the discharge propagation toward the radiation source are compared with the available experimental data.

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