Lasing from the domain of collision of ionisation waves produced due to electric field concentration at electrodes with a small radius of curvature

Тарасенко, В. Ф.; Tel'minov, A E; Бураченко, А. Г.; Рыбка, Д. В.; Бакшт, Е. Х.; Ломаев, М. И.; Панченко, А. Н.; Vil'tovskii, P O

doi:10.1070/qe2011v041n12abeh014713

Cited by 7 publications

(4 citation statements)

References 9 publications

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“…For example, it is observed in the positive column of glow discharge [27] and in a transverse discharge [28] in the nitrogen and air, in REP DD in nitrogen [29]. Secondly, the Π state of nitrogen molecule -the upper state of the transitions of (2 + ) nitrogen system is effectively populated at high (150-200 V/(cm·Torr)) values of the reduced electric field strength [30], which are realized in the region of the ionization wave front during the breakdown of the discharge gap [31]. Third, the effective lifetime of the Π state of nitrogen molecule , which is determined by radiative and collisional quenching (1), is less than 1 ns at pressures higher than atmospheric [29]: In (1) , , -pressure, temperature and Boltzmann constant, relatively; , , the reaction rate constants of collisional quenching of Π state (2):…”

Section: Experimental Setup and Measurementmentioning

confidence: 99%

Breakdown features of a high-voltage nanosecond discharge initiated with runaway electrons at subnanosecond voltage pulse rise time

Ломаев¹,

Белоплотов

Тарасенко

et al. 2015

IEEE Trans. Dielect. Electr. Insul.

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In the wide pressure range of the pure nitrogen and sulfur hexafluoride with small admixture of nitrogen (2,5%) the development of the breakdown during the formation of diffuse discharges initiated by runaway electrons and X-Ray was investigated. Nanosecond voltage pulses of both polarities with an amplitude up to ~300 kV and risetime of ~0.5 ns applied across the discharge gap did provide sharply nonuniform electric field distribution. Estimations of average propagation velocity of the ionization wave in the nitrogen and mixture sulfur hexafluoride with nitrogen were performed on the basis of data on dynamics of radiation intensity of the second positive (2 + ) nitrogen system from various regions along of the longitudinal axis of interelectrode gap. Interrelation between the glow dynamics and the local value of the electric field strength has been defined. The results showed that the breakdown is developed in the form of the ionization wave propagating from the potential electrode with the highest concentration of the electric field to the flat-grounded one. In the regions near the grounded electrode practically simultaneous increasing of radiation intensity is registered, that indicates on a possible change of the breakdown mechanism in this part of the discharge gap.Index Terms -Gas discharges, electric breakdown, high-voltage breakdown, ionization wave propagation, spontaneous emission, electric fields.

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Section: Experimental Setup and Measurementmentioning

confidence: 99%

Breakdown features of a high-voltage nanosecond discharge initiated with runaway electrons at subnanosecond voltage pulse rise time

Ломаев¹,

Белоплотов

Тарасенко

et al. 2015

IEEE Trans. Dielect. Electr. Insul.

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“…Let us consider the REP DD development in laser gap formed between long blade electrodes 24 . When two blade electrodes were used, diffusive jets originated from both electrodes and overlapped approximately at a distance of 1/3 from the anode.…”

Section: Study Of the Rep Dd Formationmentioning

confidence: 99%

“…Diffuse discharges are started to apply for excitation of gas lasers [23][24][25] . However, at the moment this REP DD application is studied insufficiently.…”

Section: Introductionmentioning

confidence: 99%

Gas lasers pumped by runaway electrons preionized diffuse discharge

et al. 2015

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It was shown that run-away electron preionized volume (diffuse) discharge (REP DD) can be used as an excitation source of gas mixtures at elevated pressures and can produce laser emission.We report experimental and simulated results of application of the REP DD for excitation of different active gas mixtures. Kinetic model of the REP DD in mixtures of nitrogen with SF 6 is developed allowing predicting the radiation parameters of nitrogen laser at 337.1 nm. Peculiarities of the REP DD development in different gas mixtures are studied, as well.It was shown that the REP DD allows obtaining efficient lasing stimulated radiation in the IR, visible and UV spectral ranges. New operation mode of nitrogen laser is demonstrated under REP DD excitation. Laser action on N 2 , HF, and DF molecules was obtained with the efficiency close to the limiting value.Promising prospects of REP DD employment for exciting a series of gas lasers was demonstrated. It was established that the REP DD is most efficient for pumping lasers with the mixtures comprising electro-negative gases.

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“…Early [1][2][3][4] it was shown that gas mixtures at elevated pressures pumped by a runaway-electron-preionized volume (diffuse) discharge (REP DD) exhibited lasing in the IR 1 , visible 2 and UV 3, 4 spectral ranges. In those works, runaway electrons and laser radiation were generated in the same discharge gap.…”

Section: Introductionmentioning

confidence: 99%

Efficient gas lasers pumped by run-away electron preionized diffuse discharge

et al. 2015

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It was shown that run-away electron preionized volume (diffuse) discharge (REP DD) can be used as an excitation source of active gas mixtures at elevated pressures and can produce laser emission.We report experimental and calculated results of application of the REP DD for excitation of different active gas mixtures. It was shown that the REP DD allows to obtain efficient lasing stimulated radiation in the IR, visible and UV spectral ranges.Kinetic model of the REP DD in mixtures of nitrogen with SF 6 is developed allowing to predict the radiation parameters of nitrogen laser at 337.1 nm.Promising prospects of REP DD employment for exciting a series of gas lasers was demonstrated. Lasing was obtained on molecules N 2 , HF, and DF with the efficiency close to the limiting value. It was established that the REP DD is most efficient for pumping lasers with the mixtures comprising electro-negative gases.

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Lasing from the domain of collision of ionisation waves produced due to electric field concentration at electrodes with a small radius of curvature

Cited by 7 publications

References 9 publications

Breakdown features of a high-voltage nanosecond discharge initiated with runaway electrons at subnanosecond voltage pulse rise time

Breakdown features of a high-voltage nanosecond discharge initiated with runaway electrons at subnanosecond voltage pulse rise time

Gas lasers pumped by runaway electrons preionized diffuse discharge

Efficient gas lasers pumped by run-away electron preionized diffuse discharge

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