Pulsed lasing in dysprosium vapors

Gerasimov, V. V.; Starkova, L. I.

doi:10.1134/1.1454047

Cited by 8 publications

(14 citation statements)

References 3 publications

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“…At the lowest pressure (p = 6 mbar) only He I and He II lines appear in the spectrum. At p = 20 mbar, besides the He atomic and ion lines the (0, 0) band of the He 2 3pπ e 3 g -2sσ a 3 + u transition [45,46] appears with a low intensity in the above wavelength range. At higher pressure (p = 60 mbar) the intensity of this band becomes comparable to that of the He I and He II lines.…”

Section: Combination Of the Modelsmentioning

confidence: 99%

Self-consistent modelling of helium discharges: investigation of the role of He₂⁺ions

Kutasi

Hartmann

2001

J. Phys. D: Appl. Phys.

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Helium glow discharges in the p = 6-60 mbar pressure range have been investigated experimentally and by means of a one-dimensional self-consistent hybrid model. Unlike most of the hybrid models developed previously for noble gas discharges, our model also includes He + 2 molecular ions. The electrical parameters of the discharges, recorded in the experiments, as well as the electron temperature for the different discharge conditions (determined spectroscopically) have been used as input data for the hybrid model. Our studies show that He + 2 ions are present in the discharge even at 6 mbar with a concentration comparable to that of He + ions. Conversion of atomic to molecular ions and the associative ionization process are identified as main sources of molecular ions. At low pressures the He + 2 ions are principally lost at the electrodes, while at higher pressures the recombination processes become their dominant losses. As the rates of recombination processes are strongly pressure-dependent, the optical emission spectrum changes with increasing pressure and shows significant intensity of He 2 molecular bands. The contribution of He + 2 ions to the ion current at the cathode as well as their contribution to maintenance of the discharge is found to be around 10%, even at the lowest pressure of 6 mbar, where He + 2 formation in most of the discharge models is neglected.

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Section: Combination Of the Modelsmentioning

confidence: 99%

Self-consistent modelling of helium discharges: investigation of the role of He₂⁺ions

Kutasi

Hartmann

2001

J. Phys. D: Appl. Phys.

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“…87 Mexican president Portillo, too, pointed out that his first and most memorable impression of Bulgaria was the fact that "Bulgaria is truly a country with a rich ancient culture." 88 On occasion of the Bulgarian exhibitions, Mexican newspapers profusely praised "the glorious history of the Bulgarian Bulgarian Culture in India and Mexico nation." 89 Bulgarian and Indian leaders mentioned as a point of comparison their relatively recent independence, 1947 for postcolonial India and 1944 for "socialist" Bulgaria.…”

Section: Selecting New Allies: Political and Economic Cooperationmentioning

confidence: 99%

The “Natural Ally” of the “Developing World”: Bulgarian Culture in India and Mexico

Dragostinova¹

2018

Slavic rev.

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This article examines Bulgarian cultural relations with India and Mexico in the 1970s to explore the role of cultural diplomacy in the relationship between the Second and the Third Worlds during the Cold War. In 1975, Liudmila Zhivkova, the daughter of the Bulgarian leader, became the head of the Committee for Culture; under her patronage, Bulgarian officials organized literally hundreds of exhibitions, concerts, academic conferences, book readings, cultural weeks, and visits that involved the three countries in an intense cultural romance. Even though Bulgaria was known as the “Soviet master satellite,” culture provided a considerable level of independence in Bulgarian dealings with international actors, which often caused Soviet irritation. In the end, by using culture, in addition to political and economic aid, Bulgaria managed to forge its role as an intermediary between the Second World and the Global South, and to project its notions of development on a global scene.

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“…At the same time, a gas laser on the dysprosium vapor has lately been created [4]. Unlike previously created lasers on vapor of REEs: samarium, europium, ytterbium, and thulium [5,6], in which the temperature of the discharge tube ranged from T=700 K (for ytterbium) to T=1070 K (for thulium and samarium), dysprosium vapor laser generation could only be obtained at T=1470-1670 K. Two laser transitions DyI λ 1 =849.015 nm and λ 2 =917.2±0.1 nm were detected, the former was identified as 4f 10 ( 5 I 7 )5d6s( 3 D) 3 [7] 7 → 4f 9 ( 6 H°)5d6s 2 7 G°7 (E=24 430.27→12 655.13 cm −1 ). Here, the term 3 [8] is mistakenly indicated instead of real 3 [7] for the upper level in figure 1 in [4].…”

Section: Introductionmentioning

confidence: 99%

“…The transition λ 2 with a longer wavelength was not identified in [4], which used compilation data from [7] to identify the DyI spectral lines. It should be noted that the attempt to classify this line here using data on new levels of the dysprosium atom from [8] was unsuccessful, as well.…”

Section: Introductionmentioning

confidence: 99%

Excitation of 6snp levels of dysprosium atom by electron impact (n = 6, 7)

Smirnov¹

2018

J. Phys. B: At. Mol. Opt. Phys.

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The article has experimentally studied the electron impact excitation of the dysprosium atom’s resonance levels related to the configurations 4f106s6p° and 4f106s7p°. At an incident electron energy of 30 eV, 66 excitation cross sections for the transitions from the levels of the configuration 4f106s6p° and 12 excitation cross sections for the transitions from the levels of the configuration 4f106s7p° were measured. Twenty-five optical excitation functions were recorded in the electron energy range E = 0–200 eV for transitions from the levels of the configuration 4f106s6p°. The greatest values of the measured cross sections exceed Q30 > 2 × 10–16 cm2.

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Pulsed lasing in dysprosium vapors

Cited by 8 publications

References 3 publications

Self-consistent modelling of helium discharges: investigation of the role of He₂⁺ions

Self-consistent modelling of helium discharges: investigation of the role of He₂⁺ions

The “Natural Ally” of the “Developing World”: Bulgarian Culture in India and Mexico

Excitation of 6snp levels of dysprosium atom by electron impact (n = 6, 7)

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Pulsed lasing in dysprosium vapors

Cited by 8 publications

References 3 publications

Self-consistent modelling of helium discharges: investigation of the role of He2+ions

Self-consistent modelling of helium discharges: investigation of the role of He2+ions

The “Natural Ally” of the “Developing World”: Bulgarian Culture in India and Mexico

Excitation of 6snp levels of dysprosium atom by electron impact (n = 6, 7)

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Self-consistent modelling of helium discharges: investigation of the role of He₂⁺ions

Self-consistent modelling of helium discharges: investigation of the role of He₂⁺ions