Optical characteristics and parameters of the plasma of a barrier discharge excited in a mixture of mercury dibromide vapor with nitrogen and helium

Малинина, А. А.; Guivan, N. N.; Shimon, L. L.; Шуаибов, А. К.

doi:10.1134/s1063780x10090072

Cited by 7 publications

(12 citation statements)

References 12 publications

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“…The partial pressures of helium and sulfur hexafluoride were the same in all experiments. At such pressures, the radia tion power of binary HgBr 2 -He and ternary HgBr 2 -SF 6 -He mixtures was maximal [12,13].…”

Section: Experimental Datamentioning

confidence: 97%

“…The low frequency (a pulse repetition rate of no higher than 10 Hz) charac teristics of the lamps were also studied using external heating of the mixture to provide a desired mercury dibromide vapor pressure. It is of interest to see whether the mixture can be efficient at elevated pulse repetition rates (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12) under the conditions of self heating and also elucidate the physics of processes improving the energy parameters. To solve this prob lem, we in this work studied the optical characteristics and plasma parameters of blue-green exciplex lamps.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, they are promising for solving agrophysical problems (such as the rise in the excitation efficiency of chlorophyll mol ecules and thereby in the growth rate of plants), pumping of solid state and dye lasers, medicine, and biotechnology. As a working medium, these lamps use the plasma of a discharge initiated in binary or ternary mercury dihalide-gas (neon, argon, helium, xenon, and nitrogen) mixtures [1][2][3][4][5][6][7][8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

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Optical characteristics and plasma parameters of a blue-green exciplex lamp

Малинина

Shimon

2012

Tech. Phys.

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The optical characteristics and plasma parameters of an exciplex lamp radiating in the blue-green spectral range are studied. A plasma is generated by an atmospheric pressure barrier discharge initiated in a quaternary mixture including mercury dibromide, sulfur hexafluoride, nitrogen, and helium. It is shown that the exciplex lamp can radiate at an elevated repetition rate of pump pulses (1-12 kHz) under the conditions of mixture self heating. A tradeoff between the radiation power and nitrogen partial pressure is found. The mean specific radiation power in the blue-green range at a level of 480 mW/cm 3 is achieved at partial vapor pressures of mercury dibromide, sulfur hexafluoride, nitrogen, and helium of 0.70, 0.07, 4.00, and 117.20 kPa, respectively. The plasma parameters, namely, the electron energy distribution function; concentration, tem perature, and mean energy of electrons; transport properties; and rate constants of elastic and inelastic elec tron scattering by the working mixture components are determined as functions of ratio E/N (where E is the electric field strength and N is the total concentration of mercury dibromide, sulfur hexafluoride, and nitro gen molecules and helium atoms). It is found that mercury monobromide molecules and also excited and higher energy states take part in the population of exciplex molecules HgBr* (B 2 states) in the course of quenching these exciplexes by sulfur hexafluoride and nitrogen molecules.

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Section: Experimental Datamentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Optical characteristics and plasma parameters of a blue-green exciplex lamp

Малинина

Shimon

2012

Tech. Phys.

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“…These lamps are attractive due to their narrow-band short-wavelength emission suitable for intense illumination of large areas. In this paper, we study a mercurybromide dielectric-barrier-discharge (DBD) lamp related to excilamps [7][8][9][10][11][12]. The blue-green radiation of this lamp can find applications in scientific research, biotechnology, photonics, medicine, and can also be used to manufacture gasdischarge display panels [8].…”

Section: Introductionmentioning

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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“…To date, several created and studied types of exciplex spontaneous sources of visible light in which to create gas-discharge plasma on working mixtures barrier discharge and other types of discharges have been used. In these works, for the most part, the main attention was focused on gas-discharge plasma on mixture of mercury dibromide vapor with gases: helium, neon, argon, xenon, krypton, nitrogen, and sulfur hexafluoride [9]- [17].…”

Section: Introductionmentioning

confidence: 99%

Diagnostics of Optical Characteristics and Parameters of Gas-Discharge Plasma Based on Mercury Diiodide and Helium Mixture

Малинина¹

2015

OJAppS

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The results of diagnostics of spectral, temporal and energy characteristics of the radiation of gas-discharge plasma in a mixture of mercury diiodide vapor with helium in the spectral range of 350-900 nm, and the plasma parameters in the range of reduced electric field E/N = 1-100 Td are presented. The plasma is created in the barrier discharge device with a cylindrical aperture. The electrodes are placed 0.2 m in length at a distance of 0.015 m. The amplitude of the pump pulse, the duration and frequency were 20-30 kV, 150 ns and 1-20 kHz, respectively. Radiation in the visible region of the spectrum of mercury monoiodide exciplex molecule is revealed. Regularities in the optical characteristics of the plasma, depending on the partial pressures of the components of the mixture, the electron energy distribution function, mean electron energy, specific losses of discharge power on the process of dissociative excitation of mercury monoiodide (state 2 1 2 В + Σ) molecules as well as the rate constant of dissociative excitation of mercury monoiodide molecules in working mixture depending on the given reduced electric field are established.

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Optical characteristics and parameters of the plasma of a barrier discharge excited in a mixture of mercury dibromide vapor with nitrogen and helium

Cited by 7 publications

References 12 publications

Optical characteristics and plasma parameters of a blue-green exciplex lamp

Optical characteristics and plasma parameters of a blue-green exciplex lamp

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

Diagnostics of Optical Characteristics and Parameters of Gas-Discharge Plasma Based on Mercury Diiodide and Helium Mixture

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