Abstract: A power supply for a magnetron varies a power output level and prevents moding of the magnetron. To provide a variable power output, a microprocessor senses an anode current and voltage of the magnetron. Based on the sensed signals, the microprocessor adjusts the conduction angle of a thyristor to obtain the desired power level. The microprocessor also monitors the anode voltage for detecting moding of the magnetron. If moding is detected, the microprocessor adjusts the conduction angle of another thyristor to change the current supplied to the filament. By changing the filament current, the microprocessor effectively prevents the moding of the magnetron.

Abstract: A method and apparatus for preventing contaminated reverse flows in air or gas impingement cooled lamps. In an electrodeless lamp, a stream of clean air or gas is provided as a replacement for contaminated air.

Abstract: A process and apparatus for removing organic contaminants from a fluid includes providing a fluid containing at least one type of organic pollutant molecules that have the characteristics of reacting generally reluctantly with an oxidizing agent at room temperature. The organic pollutant molecules have an initial substantially stable, non-reacting and unexcited molecular energy level state. The fluid is then exposed to a wave-form light energy source so as to upset the initial molecular energy state to reach a second substantially unstable, reacting and excited molecular energy state of the organic pollutant molecules. The fluid is exposed to an oxidizing agent, while keeping the organic pollutant molecules in the second molecular energy level state, for a time period sufficient to thoroughly oxidize the organic pollutant molecules. The fluid, which is substantially free of the organic pollutant molecules, is then discharged to the atmosphere.

Abstract: A lamp including a reflector and a light source for illuminating a target area in which the light rays on the target and have a small average local divergence. The reflector and light source are configured so that the predominant portion of the light rays which strike the target area do not cross the axis of the reflector. The reflector may be segmented and the light source is located so that various points on the target receive radiation which is reflected from a different number of segments with points near the periphery of the target area receiving radiation from a greater number of segments than those near the center of the target.