Flashover on a dielectric surface irradiated by EM wave

Conference · Sun Dec 31 04:00:00 EST 1995

OSTI ID:212997

Galstjan, E A ^[1]

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1. Moscow Radiotechnical Inst. of Russian Academy of Sciences (Russian Federation)

Surface flashover along dielectric interfaces in vacuum is the limiting factor in high voltage and intense MW systems. Notice that the physical mechanisms involved in flashover are in many respects similar both in the case of high voltage flashover (HVF) and in the case of microwave surface flashover (MWSF). In particular, it should be mentioned the following phenomena: the existence of a dielectric surface charging and a saturation of the current in the early phase of flashover, the major role of a gas desorption from the surface and the following discharge in a gas {open_quotes}cloud{close_quotes} near the surface. On the other hand, the MWSF has a number of the inherent distinctions: it may take place without any conductors and electrodes, there is no any fixed direction of the discharge front moving, etc. The same is also true for secondary electron emission avalanche (SEEA) in high-frequency electric fields. As the physical mechanisms leading to flashover are far from being clear, a variety of different models have been proposed to describe the HVF. This work is an attempt to a theoretical description of the MWSF in the framework of the gaseous model, much-studied in the HVF.

• OSTI ID: 212997
• Report Number(s): CONF-950749--
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
DIELECTRIC MATERIALS
FLASHOVER
MICROWAVE RADIATION
PHYSICAL RADIATION EFFECTS
SECONDARY EMISSION