Magnetron power supply at high stability and its application in plasma excitation for the production of ultraviolet radiation

Details Magnetron power supply at high stability and its application in plasma excitation for the production of ultraviolet radiation Magnetron power supply at high stability and its application in plasma excitation for the production of ultraviolet radiation

Jan 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993phdt........23p&link_type=abstract

Ph.D. Thesis Institut National Polytechnique, Toulouse (France).

Physics

Atomic Excitations, Dynamic Characteristics, Electric Power, Magnetrons, Plasma Power Sources, Plasmas (Physics), Stability, Ultraviolet Radiation, Electric Discharges, High Frequencies, Magnetic Fields, Mercury Lamps, Microwave Frequencies, Microwaves, Resonators

Scientific paper

This work describes the combination of different disciplines which allow the development of a microwave generator with capacity for power control and stabilization frequency. This generator is used for plasma excitation in partially filled mercury lamps and for the production of ultraviolet radiation. By now, resonance techniques lead to a lot of researches. For our part we used a resonance converter as a magnetron power supply, exploiting its inherent characteristic of current limitation to protect the magnetron. The power is controlled by varying the frequency of the converter. The implementation of several electronic systems for the detection and control of the power and microwave frequency was made, in order to get an optimum dynamic behaviour. For the optimum transfer in energy, from the source (microwave generator) to the load (mercury lamp), a special resonator was implemented. This resonator allow UV radiation, at the same time avoiding the leakage of microwave energy. Finally, this work shows the advantages of the UV radiation through microwave discharge in comparison to conventional methods.

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