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Glow-discharge-pumped broadband ultraviolet lamp

“…At smaller currents of the glow discharge, the diameter of the plasma inside the tube was decreased to 2-3 mm. Such a behavior of the spatial characteristics of the longitudinal discharge is close to the corresponding results for discharges in He(Xe)-I 2 mixtures [8,9] and is related to the formation of an ion-ion plasma in the central part of the cylindrical tube. This plasma is characterized by the presence of the ions X − , X 2 − , R + , R 2 + (where X is Br and I; R is Kr and Xe), and electrons are forced out from it to a periphery segment in the neighborhood of the inner surface of the discharge tube.…”

“…A direct-current discharge was fired using a high-voltage rectifier designed for load currents of 1-100 mA and a voltage of 1-30 kV. Measurement of the electric characteristics of the discharge and of the UV radiation of the lamp was conducted following the photometric procedure described in [7].…”

“…In the glow discharge on the Xe-Br 2 -I 2 mixture, the formation of the continuum also involves the bands of XeI ( At a density of bromine in the mixture that corresponds to a pressure higher than 300 Pa, an instability develops in the glow discharge, with the result that the radiation (when feeding the discharge in a continuous regime) is a combination of pulses of microsecond duration against the background of the continuous component. This regime of the lamp operation calls for a special study and is inherently close to self-initiating pulse-periodic discharges on mixtures of inert gases with the molecules of chlorine in the discharge gap with an interelectrode spacing of 2-3 cm [8,9].…”

Electrodischarge Ultraviolet Xenon/Iodine Lamp

“…The radiation at electric-vibrational transitions of excimer molecules amounts to no less than 70-80% of the radiation power of the electric discharge (glow, barrier, or capacitive) plasma. It can be obtained both in the form of one emission band of width up to 10 nm [2-4] and as a superposition of the emission bands of different excimer molecules forming a single continuum of width up to 100-150 nm [5][6][7]. Since the excimer-halogen lamps emit effectively in the bactericidal region of the spectrum (200-300 nm), they are of great interest for use in biotechnologies, agriculture, and medicine [8][9][10].…”

“…The pressure of iodine vapors was estimated by the temperature of the coldest part of the lamp using the data from the reference book [17]. The UV radiation power of the lamp from the whole side surface of the lamp was measured by the photometric technique of [18].…”