Electric-discharge He/Xe/I2 excimer-halogen UV lamp

Glow-discharge-pumped broadband ultraviolet lamp

“…The substitution of less aggressive molecules of iodine for the molecules of chlorine made it possible to increase the service life of a lamp in a gas-static regime up to 500-1000 h [2][3][4]. Except for the 206.2-nm line of the iodine atom, the radiation spectrum of these lamps also has a system of fairly bright molecular bands at 253 nm for XeI (B-X) and 342 nm for I 2 *…”

Numerical Simulation of Plasma Kinetics in Low-Pressure Discharge in Mixtures of Helium and Xenon with Iodine Vapours

“…The results of numerical simulations were compared to the data of experimental studies reported in a cycle of works (Shuaibov et al, 2004(Shuaibov et al, , 2005b(Shuaibov et al, , 2009. A longitudinal glow discharge in helium and xenon rare gases was initiated in a cylindrical discharge tube made of quartz transparent to = 190 nm.…”

“…The mixture life of such lamps reaches 10 3 hours (Lomaev & Tarasenko, 2002;Shuaibov et al, 2005aShuaibov et al, , 2005b. The use of the е-Хе-I 2 active medium in a glow discharge lamp also allows one to obtain emission of the excimer molecule XeI(B-X) (253 nm) (Shuaibov, 2004 et al). Moreover, of special interest is the fact that the wavelength of this transition is close to that of the most intense spectral line of the mercury atom in low-pressure gas-discharge lamps, which is used in a number of optical technologies.…”

A continuously emitting electric discharge UV lamp

“…The operation of such a UV radiator was optimized only at an iodine atom resonance line of 206.2 nm. Studies of the emission characteristics of a glow discharge in Xe/I 2 and He/Xe/I 2 mixtures at a power of ≤ 100 W deposited into the plasma [9][10][11] showed that, apart from atomic iodine emission, the broadband emission of XeI( B -X ) (253 nm) and XeI( B -X ) (342 nm) molecules is also important: the fraction of molecular emission from the glow discharge plasma on iodine vapors can be as high as approximately half the total UV radiation of the lamp.This work presents the results from developing and optimizing the output characteristic of a high-power, low-pressure electric discharge lamp operating in a continuous emission mode on a mixture of helium with iodine vapors.A longitudinal glow discharge was formed in a discharge tube 1.4 cm in diameter made of UV-brand quartz, transparent to wavelengths of <190 nm. The interelectrode distance was 50 cm.…”

“…The operation of such a UV radiator was optimized only at an iodine atom resonance line of 206.2 nm. Studies of the emission characteristics of a glow discharge in Xe/I 2 and He/Xe/I 2 mixtures at a power of ≤ 100 W deposited into the plasma [9][10][11] showed that, apart from atomic iodine emission, the broadband emission of XeI( B -X ) (253 nm) and XeI( B -X ) (342 nm) molecules is also important: the fraction of molecular emission from the glow discharge plasma on iodine vapors can be as high as approximately half the total UV radiation of the lamp.…”