Accession Number : ADA141909

Title :   A Program to Improve Solar Blind UV (Ultraviolet) Flash Lamps.

Descriptive Note : Rept. for 1 Sep 80-31 May 82,


Personal Author(s) : Miller,W J

PDF Url : ADA141909

Report Date : Oct 1983

Pagination or Media Count : 64

Abstract : A study was conducted of UV light sources, particularly Xenon/H2 flash lamps, in an effort to achieve higher efficiencies in the upper end of the solar blind wavelength region for application to UV communication devices. Lamps containing a number of inert gases with and without added H2, were subjected to detailed spectroscopic examination and their UV output efficiencies compared to that of conventional commercially available lamps of similar physical configuration. A highly versatile power supply capable of delivering very short pulses at variable frequency and power level was designed and built for this purpose. It incorporates the capacity of hold off capacitor recharge for specifiable times between pulses in order to minimize premature lamp firing which produces holdover and renders the source useless for Fm or pulse position modulation operation. Modest increases in efficiency were achieved by increasing Xe pressure and operating the lamps at the highest power and voltage levels compatible with the structural strength of the lamp and frequency range selected for operation.

Descriptors :   *Flash lamps, *Ultraviolet lamps, *Ultraviolet radiation, *Xenon lamps, Ultraviolet communications, Efficiency, Pulse generators, Pulse position modulation, Hydrogen, Power supplies, Short pulses

Subject Categories : Air Condition, Heating, Lighting & Ventilating
      Ultraviolet Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE