Experimental results for a pulsed vortex water wall high-pressure argon lamp

This paper presents experimental results for a pulsed vortex water wall high pressure arc lamp. The power source consists of a DC ignitor connected in series with a sustaining source. The ignitor is shorted after a sustaining current is achieved, followed by the connection of a regulated pulsed current source connected in parallel with the sustaining source. The application of this lamp in rapid thermal processing systems dictates that the interpulse period of the pulsed source be made as short as possible. Experiments have been performed with and without the sustaining source. Arc overvoltage after the current is reapplied becomes larger as the interpulse period is made longer. Overvoltages are higher if no sustaining source is used during the interpulse period. An acoustic resonance is observed with a duration equal to the axial convective transit time. A sustaining source may not be required based on the results of the experiments