Effects of the Operating Conditions on the UV-B (308 nm) Power and Efficiency of the XeCl* Barrier Discharge Excilamp

Saghi, B.; Avtaeva, S. V.; Rahmani, B.; Zissis, Georges

doi:10.1109/access.2016.2530742

Cited by 8 publications

(3 citation statements)

References 23 publications

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“…The usual way of creation of excimers in excimer lasers and lamps is indirect. In the rare-gas halide excimer lasers and lamps [5,6,29,30], it is ionization of the rare-gas atoms, formation of negative halogen ions, and then ion recombination. Another mechanism is production of the excited rare-gas atoms and their harpoon reaction with halogen molecules.…”

Section: Discussionmentioning

confidence: 99%

Direct electron-impact mechanism of excitation of mercury monobromide in a double-pulse dielectric-barrier-discharge HgBr lamp

Datsyuk

Izmaǐlov

Naumov

et al. 2016

Plasma Sources Sci. Technol.

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In a nonequlibrium plasma of a gas-discharge HgBr lamp, the terminal electronic state of the HgBr(B-X) radiative transition with a peak wavelength of 502 nm remains populated for a relatively long time and is repeatedly excited to the B state in collisions with plasma electrons. This transfer of the HgBr molecules from the ground state X to the excited state B is the main mechanism of formation of the light-emitting molecules especially when the lamp is excited by double current pulses. According to our simulations, due to the electron-induced transitions between HgBr(X) and HgBr(B), the output characteristics of the DBD lamp operating in a double-pulse regime are better than those of the lamp operating in a single-pulse regime. In the considered case, the peak power is calculated to increase by a factor of about 2 and the lamp efficiency increases by about 50%.

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Section: Discussionmentioning

confidence: 99%

Direct electron-impact mechanism of excitation of mercury monobromide in a double-pulse dielectric-barrier-discharge HgBr lamp

Datsyuk

Izmaǐlov

Naumov

et al. 2016

Plasma Sources Sci. Technol.

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“…To decrease a time of simulation the simplified kinetic scheme of reactions was used [7,8]. Characteristics of the DBD in pure chlorine were simulated using similar 1D fluid model of the DBD described in detail in [9].…”

Section: Modelmentioning

confidence: 99%

On electron attachment effect on characteristics of the DBD in chlorine and its mixtures with xenon

Avtaeva

2017

J. Phys.: Conf. Ser.

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Abstract. The electron attachment effect on DBD characteristics in chlorine and its mixtures with xenon has been studied. Characteristics of the DBDs in pure chlorine and in xenonchlorine mixtures with a chlorine fraction of 0.1-5% were modeled using the fluid model. It is shown that the electron attachment limits a magnitude of the DBD current, contributes to formation of multiple current spikes, appearance of a double layer near the dielectric surface and formation of XeCl * excimer molecules, and leads to a redistribution of the power deposited into the discharge: more power is deposited into ions and less power is deposited into electrons. IntroductionThe electron attachment in plasma of electronegative gases and their mixtures with electropositive gases made the plasma properties very different from that of electropositive plasma [1]. The properties of the electronegative plasma depend on electronegativity nn/ne and a whole series of other parameters. The theoretical and experimental studies of dc discharges and slightly less rf discharges show that the discharges in electronegative gases are structured with an ion-ion core and an outer electron-positive ion plasma [2,3]. The electron attachment effects on property of the transient discharges quickly changing their characteristics in space and time as, for example, the dielectric barrier discharges (DBD) are much less studied. DBDs in inert gas-halide mixtures are widely used in excilamps to generate VUV radiation [4,5] and can be applied for diverse surface treatment. The future development of the DBD plasma sources will depend on a better understanding the underlying physics. There we present some finding on the electron attachment effect on properties the DBD in Xe-Cl2 mixtures and in pure chlorine, which are revealed at fluid modeling of the discharges.

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“…As a form of high-power spontaneous emission ultraviolet (UV) lamps, the excilamps that can emit relatively narrow bands of UV and vacuum ultraviolet (VUV) characterizing excimer and exciplex molecules, have garnered a great deal of attention with respect to their mechanisms [1][2][3][4][5][6][7][8][9][10][11][12][13] and applications [2][3][4][14][15][16][17][18]. Typical excimers include rare gas molecules (eg.…”

Section: Introductionmentioning

confidence: 99%

Radiant characteristics of high power excilamps with binary exciplexes of XeCl and XeBr

Han

Zhu

Liu

et al. 2019

J. Phys. D: Appl. Phys.

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The characteristics of the coaxial binary excilamps containing two exciplexes of XeCl * and XeBr * were studied based on the dielectric barrier discharge with various annular gap, driven by sinusoidal electronic control gear. The effect of the gas pressure, halogen fraction, and discharge gap were investigated. The optimum total pressure is 150-200 mbar and 200-250 mbar for 308 nm and 282 nm, respectively, leading to about 200 mbar for the total radiant efficiency. The optimized total halogen percentage is in range of 0.2%-0.3%, which is slightly increased, with a higher bromine ratio. Additionally, the radiant efficiency shows weak dependence on the discharge gap.

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Effects of the Operating Conditions on the UV-B (308 nm) Power and Efficiency of the XeCl* Barrier Discharge Excilamp

Cited by 8 publications

References 23 publications

Direct electron-impact mechanism of excitation of mercury monobromide in a double-pulse dielectric-barrier-discharge HgBr lamp

Direct electron-impact mechanism of excitation of mercury monobromide in a double-pulse dielectric-barrier-discharge HgBr lamp

On electron attachment effect on characteristics of the DBD in chlorine and its mixtures with xenon

Radiant characteristics of high power excilamps with binary exciplexes of XeCl and XeBr

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