Gas lasers pumped by runaway electrons preionized diffuse discharge

Панченко, А. Н.; Сорокин, Д. А.; Тарасенко, В. Ф.

doi:10.1016/j.pquantelec.2020.100314

Cited by 17 publications

(15 citation statements)

References 127 publications

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“…In the experiments, we used a laser pumped by a diffuse discharge, which was thoroughly described in [9]. A highvoltage pulse from a RADAN-220 generator was applied to stainless steel electrodes 30 cm long with a gap d = 1.8 cm between them.…”

Section: Design Of Laser Devicesmentioning

confidence: 99%

“…the external electric circuit. The distribution of the laser photon flux along the optical axis was described by the onedimensional resonator model [9]. It was assumed in calculations that the discharge was spatially homogeneous.…”

Section: Plasma Modelmentioning

confidence: 99%

“…We have developed excitation technique bused on a double discharge circuit with a pre-pulse formed by a generator with an inductive energy storage device and semiconductor opening switch made on the base of industrial SOS-diodes [6]. It is known that high-power nanosecond excitation pulses can be realized without using an additional source for gap preionization in lasers with electrodes having a small radius of curvature [7][8][9][10]. At a short rise time of the voltage pulse, the breakdown initiated by runaway electrons gives rise to a diffuse plasma, which, at high pressures, serves as an efficient source of spontaneous and stimulated emission at different wavelengths, including the VUV range [9,10].…”

Section: Introductionmentioning

confidence: 99%

“…It is known that high-power nanosecond excitation pulses can be realized without using an additional source for gap preionization in lasers with electrodes having a small radius of curvature [7][8][9][10]. At a short rise time of the voltage pulse, the breakdown initiated by runaway electrons gives rise to a diffuse plasma, which, at high pressures, serves as an efficient source of spontaneous and stimulated emission at different wavelengths, including the VUV range [9,10].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Long pulse UV and VUV gas discharge lasers

Panchenko,

Tarasenko,

Yampolskaya

et al. 2023

XVI International Conference on Pulsed Lasers and Laser Applications

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Section: Design Of Laser Devicesmentioning

confidence: 99%

Section: Plasma Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Long pulse UV and VUV gas discharge lasers

Panchenko,

Tarasenko,

Yampolskaya

et al. 2023

XVI International Conference on Pulsed Lasers and Laser Applications

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“…When a high-voltage pulse with a short rise time is applied to electrodes providing a sharply non-uniform electric field in a gap, a diffuse discharge is formed in pressured gases due to breakdown initiation by runaway electrons and x-ray radiation. Therewith, the diffuse plasma can effectively emit VUV spontaneously and stimulated radiation [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

VUV lasing in diffuse discharges formed by runaway electrons

Panchenko,

Tarasenko,

Kozevnikov

2023

Laser Phys.

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The parameters of stimulated emission in diffuse discharges formed in a sharply inhomogeneous electric field by runaway electrons in mixtures of rare gases with the addition of H2 and F2 at pressures up to 10 atm are studied. Efficient VUV lasing was obtained at wavelengths from 148 to 193 nm on the transitions of H2, F2 and exciplex ArF* molecules. It was shown that the addition of He buffer gas increases the pulse duration, while Ne addition improves the output energy of the VUV laser on the H2 Lyman band. A laser pulse duration over 10 ns and an output of 0.12 mJ were obtained. The diffuse discharge in mixtures of He with F2 was found to form as a result of successive ionization waves. It was shown that the laser pulse at 157 nm has three peaks, which correspond to the maxima of the diffuse discharge current. Therewith, the first or second peak of the laser radiation has the maximum intensity, depending on the amplitude of the conduction current in the primary ionization wave. A maximal F2* laser electrical efficiency of η 0 = 0.18% and an output of Q 157 = 3.8 mJ were obtained in a He–F2 gas mixture at pressure of 10 atm, which exceeds the efficiency of lasers of this type pumped by transverse volume discharges with UV preionization. Long-pulse operation of the ArF* laser was achieved in a He–Ne–Ar–F2 gas mixture. Lasing at 193 nm continued during two periods of the diffuse discharge current. The total duration of the laser pulse was as long as 40 ns, and the radiation energy at 193 nm was as high as 2 mJ from an active volume of 20 cm3.

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