Eur. Phys. J. Appl. Phys.
Volume 26, Number 1, April 2004
|Page(s)||11 - 16|
|Section||Surfaces, Interfaces and Films|
|Published online||04 March 2004|
Interaction of high-power microwave beams with metal-dielectric media
General Physics Institute of Russian Academy of Sciences, 119991, Vavilova Street 38, Moscow, Russia
Corresponding author: Kossyi@fpl.gpi.ru
Revised: 3 December 2003
Accepted: 16 January 2004
Published online: 4 March 2004
Results of experimental investigation of powerful microwave beams action on the metal-dielectric compositions are presented. Dielectric surfaces with introduced metallic grains as well as dielectric powder containing small admixtures of a metallic one have been explored as an objects of irradiation. At a relatively small microwave power ( mW) all investigated targets were practically completely transparent for incident electromagnetic wave. At a relatively high power (microwave generators based on the gyratrons and powerful magnetrons) the irreversible changes in the electric and radiophysical properties of metal-dielectric composites exposed to microwave radiation whose intensity is below the threshold intensity for plasma production have been observed (sharp increase of conductivity and microwave absorption coefficient).
PACS: 71.30.+h – Metal-insulator transitions and other electronic transitions / 52.40.Db – Electromagnetic (nonlaser) radiation interactions with plasma
© EDP Sciences, 2004
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