Powerful microwave UV-lamp physics and application

Summary form only given. Version of microwave plasmatron in which gas discharge plasma excited in a cylindrical quartz tubes behaves like an extension of truncated inner or outer electrode of coaxial waveguide has been proposed and realized. Theory describing excitation and propagation of such a microwave discharge has been developed. Results of theoretical analysis and preliminary experiments have been used as the basis for construction of powerful microwave gas-discharge (in Ar+Hg mixture) UV-lamps for a systems of cleansing and disinfection of drinking and waste water as well as systems dedicated to the solid samples disinfection. Started from previously performed research of microwave discharge low pressures of working gas are chosen as an optimal ones. Under these pressures strong nonlinear processes of microwave interaction with the nonuniform plasma typical for so called "plasma resonance" and providing high efficiency of microwave radiation transformation into a biologically active UV come into force. Results of experiments demonstrate that elaborated in the GPI 1 kW microwave UV-lamp makes possible to generate 40-130 W of biologically active UV. Such a lamps have extremely high life time, are inexpensive and simple in construction and can successfully used for disinfection of water, gas, different solid surfaces.