BARRIER DISCHARGE LAMP

摘要

The invention concerns a barrier discharge lamp wherein an ultraviolet radiation flux (1) is emitted by a working gas confined between two coaxial silica tubes (TI and TO) connected at both ends. Said gas is subjected therefor to electrical pulses supplied by a generator (3) and applied between an inner electrode (El) and an outer electrode (EO) including a conductive window (F). The cooling is provided by a driven air flow, in particular in the tube (TI), by a fan (4). Its efficacy is enhanced by a radiator (EV) associated with the electrode (EI). It is further enhanced by a convective working gas flow. Said flow is provided not only around the tube (TI) in the vicinity of the electrodes, but in an axial plane as well with channels on either side of said tube at both ends thereof spaced apart from at least one of the electrodes. The invention is applicable to industrial processes and medical treatments using ultraviolet radiation with very small spectral width. It is particularly advantageous for treating psoriasis and vitiligo.