Population of 2p 55s levels of neon atoms in He-Ne plasma. 2. Temperature dependences of partial coefficients of recombination of HeNe+ ions and electrons

Иванов, В. А.; Petrovskaya, A. S.; Skoblo, Yu. É.

doi:10.1134/s0030400x14120108

Cited by 8 publications

(3 citation statements)

References 13 publications

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“…to populate efficiently all states of a neon atom with energies lower than the one of the ground vibrational level v = 0 of a HeNe + ion [8,9,23].…”

Section: Levels 2p 5 5smentioning

confidence: 99%

“…The specific features of kinetics of helium atoms in metastable states He(2 1 S 0 ) and He(2 3 S 1 ), which are present in the afterglow in appreciable densities within different time intervals (Figs. 6,8), allow one to predict the capacity for generation of both the complete set of laser lines and the 1.15 µm line associated with long-lived He(2 3 S 1 ) atoms only. The latter line was not observed in our experiments, but we do not see the reasons why population inversion should be lacking in the afterglow in the 4s−3p level system.…”

Section: Levels 2p 5 5smentioning

confidence: 99%

“…However, recent studies indicate that the potential of He−Ne plasma as a source of new optical phenomena is far from being exhausted. For example, it was demonstrated in [8,9] that the afterglow of a discharge in a He−Ne mixture is formed under certain conditions as a result of recombination of heteronuclear HeNe + ions ans electrons. The effect of concentration of emission of the 2p 5 4p shell of a neon atom, which is represented by a set of 30 spectral lines of comparable intensity in pure neon plasma, into a single line at 352.0 nm emitted from the upper 3p 1 level (in the Paschen notation) at higher helium pressures was described in [10].…”

Section: Introductionmentioning

confidence: 99%

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Low pressure DBD in He-Ne mixture. Spectroscopy of the Afterglow

Иванов

2022

Optics and Spectroscopy

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The paper considers the possibility of using a low-pressure dielectric barrier discharge (DBD) as a plasma source for the active medium of a He-Ne-laser. The results of a spectroscopic study of the decay stage of a DBD plasma of a cylindrical configuration with a pronounced inverse population of the upper level of the 2p55s configuration, which makes the line of 632.8 nm one of the brightest in the visible region of the spectrum, are presented. Based on the analysis of data on the populations of the excited levels of the neon atom and the metastable levels of helium 21S0 and 23S1, it is shown that in the early stage of the DBD afterglow at helium pressures of a fraction of a Torr, the distribution of populations over the 2p55s and 2p54d levels of the neon atom, which is characteristic of the excitation transfer mechanism, is realized. In the late afterglow with the departure of helium atoms He21S0, emission in the visible region of the spectrum is formed mainly by transitions from levels of the 2p53p, configuration, the population of which is associated with He(23S1) atoms. At this stage, the population of the 2p55s and 2p54d states by electron-ion recombination processes is ineffective and does not lead to the formation of population inversion. As an optimal solution in terms of the 632.8 nm line brightness in the afterglow, it is proposed to use a discharge with electrodes along the outer surface of a cylindrical discharge tube, initiated at frequencies that exclude the recombination stage of the afterglow. Keywords: elementary processes, barrier discharge, inverse population, afterglow, helium-neon plasma, excitation transfer

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“…to populate efficiently all states of a neon atom with energies lower than the one of the ground vibrational level v = 0 of a HeNe + ion [8,9,23].…”

Section: Levels 2p 5 5smentioning

confidence: 99%

Section: Levels 2p 5 5smentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Low pressure DBD in He-Ne mixture. Spectroscopy of the Afterglow

Иванов

2022

Optics and Spectroscopy

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The dynamics of the formation of initial stages of a transverse nanosecond discharge with an extended slot cathode in argon

Ашурбеков

Iminov

Zakaryaeva

et al. 2021

J. Phys.: Conf. Ser.

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The dynamics of the main characteristics of a limited nanosecond discharge in an extended slot cathode in argon at the values of the applied voltage to the electrodes close to the values of the voltages of the formation of a volume discharge are studied by numerical simulation. It is shown that this type of discharge can be used to create an extended dense plasma column with a high density of charged and excited particles. The analysis of the spatiotemporal dynamics of development of the electron density and the electron energy distribution function was carried out. It is shown that the high-energy electrons are formed at the front of the ionization wave due to the hollow-cathode effect.

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