Effect of Pulse Preionization Mode on Characteristics of UV Radiation from High-Power Xenon Flash Lamps

Summary form only given. The high-power UV radiation in spectral range of 200-300 nm is required for a set of applications such as decontamination of water, food etc. As known the tube xenon flash lamp is the simple and efficient source of UV radiation. In this report the results of experimental investigation of high-power tube xenon flash lamps at microsecond duration of discharge are presented. We tested flash lamps with inner diameter from 10 to 20 mm and distance between lamp electrodes from 180 to 930 mm at discharge duration less than 5 mus. It has been obtained that integrated mode of pulse preionization greatly increase the energy and efficiency of lamp radiation in the spectral range of 200 - 300 nm, and increase the lamp lifetime too. We also observed that for external surface of lamp bulb the density of radiation power in the spectral range of 200 - 300 nm was more than 100 kW/cm², and efficiency was not less than 10%.