Quasi-cw λ = 585.3 nm stimulated emission from Ne generated by pumping an Ne–H<sub>2</sub>mixture with a low-energy electron beam

Бохан, П. А.; Zakrevskĭi, Dimitrij E.; Мали, В. И.; Shevnin, A. M.; Yancharina, A. M.

doi:10.1070/qe1989v019n06abeh008116

Cited by 2 publications

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“…A high degree of ionization followed by recombination is obtained due to the beam component of non-Maxwellian electrons with energies of 1-2 keV in the tail of the electron energy distribution function. Lasing on the NeI 585.3 nm line with a peak output power of several watts and a gain of several m −1 has been obtained [9,[13][14][15].…”

Section: Introductionmentioning

confidence: 96%

“…It is of practical interest to realize PRLs in gas discharges having a beam of high-energy primary electrons. Lasing has been obtained by using special types of discharges such as the fast transverse discharge [5,8], open discharge [9], discharges with pre-ionization [10,11] and microwave discharges [12]. Various mixtures-He-Ne-Ar (Kr), Ne-Ar, Ne-H 2 and Ne-NF 3 have been used as an active medium and lasing on eight NeI lines has been obtained.…”

Section: Introductionmentioning

confidence: 99%

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A theoretical and experimental study of a Penning recombination laser operating in a hollow cathode discharge

Petrov¹

1997

J. Phys. D: Appl. Phys.

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A theoretical and experimental study of a Penning recombination laser operating in the negative glow plasma of a pulsed high-voltage hollow cathode discharge at intermediate pressures is presented. A detailed kinetic model of the plasma - chemical reactions and radiative processes determining the inversion population on the transition is developed and the time-dependent behaviour of both the plasma and laser parameters (excited states populations, electron and ion densities, electron and gas temperatures, output power and gain) is numerically calculated. An extended experimental investigation of the main plasma and laser parameters is made and a comparison with theoretical results is presented.

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Section: Introductionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

A theoretical and experimental study of a Penning recombination laser operating in a hollow cathode discharge

Petrov¹

1997

J. Phys. D: Appl. Phys.

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Effects of Penning reactions and excitation rate on the pulsed transverse-discharge neon laser for photodynamic therapy

Yang¹,

Itoh²,

Tomita³

et al. 1995

Journal of Applied Physics

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Theoretical analysis of the output performance of a transverse discharge pumped neon Penning laser (585.3 nm) using a mixture of Ne/H, is described. The validity of the kinetic model is confirmed by comparing the results to the experimental discharge and laser performance. It is theoretically shown that the optimum mixing ratio of the Ne/Hz mixture is 1:2.5, and the optimum operating pressure is about 56 Torr. The model also predicts that the intrinsic efficiency reaches a peak of 8.5 X low6 at an excitation rate of 0.5 MW/cm3 under the optimum mixing ratio and operating pressure conditions. At excitation rates in excess of 0.5 MW/cm3 the laser output power is slowly increasing and then saturates due to electron collisional quenching of the upper laser level. The laser power extraction is increased by laser injection seeding in order to rapidly build up the lasing. The improved intrinsic efficiency is about two times higher than without the injection seeding. The improved specific laser output is 8 W/cm3, therefore, a discharge volume of 125 cm3 will be able to generate the peak laser power reaching 1 kW. This power value is sufficient to obtain the same treatment effect as the gold vapor laser used in photodynamic therapy. Moreover, by fitting this model to the experimental results of the laser output energy with a Ne/D, mixture, it is shown that the Penning ionization rate constant of H, is larger than that of D,. 0 1995 American Institute of Physics. 30

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Quasi-cw λ = 585.3 nm stimulated emission from Ne generated by pumping an Ne–H₂mixture with a low-energy electron beam

Cited by 2 publications

References 1 publication

A theoretical and experimental study of a Penning recombination laser operating in a hollow cathode discharge

A theoretical and experimental study of a Penning recombination laser operating in a hollow cathode discharge

Effects of Penning reactions and excitation rate on the pulsed transverse-discharge neon laser for photodynamic therapy

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Quasi-cw λ = 585.3 nm stimulated emission from Ne generated by pumping an Ne–H2mixture with a low-energy electron beam

Cited by 2 publications

References 1 publication

A theoretical and experimental study of a Penning recombination laser operating in a hollow cathode discharge

A theoretical and experimental study of a Penning recombination laser operating in a hollow cathode discharge

Effects of Penning reactions and excitation rate on the pulsed transverse-discharge neon laser for photodynamic therapy

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Quasi-cw λ = 585.3 nm stimulated emission from Ne generated by pumping an Ne–H₂mixture with a low-energy electron beam