Multihalide operation of mercury halide lasers

Berry, A.J.; Whitehurst, Colin; King, Terence A.

doi:10.1088/0022-3727/21/1/006

Cited by 12 publications

(4 citation statements)

References 19 publications

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“…The creation of efficient exciplex sources with the simultaneous emission in the blueviolet and ultra-violet spectral intervals can be used for activating the photosynthesis process with the simultaneous destruction of viruses and bacteria. It is also important for the solution of engineering problems dealing with the preservation of energy resources on our planet and the improvement of "artificial" photosynthesis [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Mechanism of Growth of the Intensity of Radiation Emitted in the Blue-Violet Spectral Interval by Gas-Discharge Plasma Generated in the Mixtures of Mercury Diiodide Vapor, Xenon, and Neon

2017

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A mechanism allowing the intensity of radiation emitted in the blue-violet spectral interval by gas-discharge plasma created in the mixtures of mercury diiodide vapor, xenon, and neon to be increased in comparison with the intensity of radiation from gas-discharge plasma in the mixtures of mercury diiodide vapor and neon is established. The plasma parameters and the reduced electric field, at which the specific discharge power spent for the excitation of mercury monoiodide exciplex molecules is maximum, are determined. The research results can be used for the creation of a more efficient exciplex lamp with bands emitted in the blue-violet spectral interval. K e y w o r d s: gas-discharge plasma, radiation emission by exciplex molecules, plasma parameters, mercury diiodide, xenon, neon.

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Section: Introductionmentioning

confidence: 99%

Mechanism of Growth of the Intensity of Radiation Emitted in the Blue-Violet Spectral Interval by Gas-Discharge Plasma Generated in the Mixtures of Mercury Diiodide Vapor, Xenon, and Neon

2017

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“…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%

“…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%

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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“…We report here, therefore, an investigation of the tunable behaviour of the mixed mercury halide laser. In a previous paper (Berry et al 1988) we described the general operation of various double-halide mixtures in a simple two-mirror cavity, concentrating mainly on the energies in the two components of the output radiation. The present work investigates more fully the spectral characteristics of the output, and how it is controlled by various intra-cavity tuning elements and cavity Qfactors.…”

Section: Introductionmentioning

confidence: 99%