Inversions de population lors de la création, par interaction laser résonnante, de plasmas complètement ionisés

Bobin, J. L.; Zaïbi, M.-A.

doi:10.1051/jphyslet:019850046016073700

Cited by 4 publications

(2 citation statements)

References 12 publications

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“…The theoretical approach of laser ionization by resonant light for long laser pulses (hundreds of nanoseconds) was given by Measures et al [8] and Bobin and Zaibi [9]. While, the model of few nanoseconds exciting pulses is presented by Stacewicz and Topulos [10].…”

Section: −3mentioning

confidence: 99%

Computational Study of Resonantly Ionizing Rubidium Vapor by Nanosecond Laser Pulses

Mahmoud¹,

Gamal²

2012

JMP

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An investigation of the resonant interaction of the rubidium atoms with an intensity (10 kW·cm −2 ≤ I ≤ 2 MW·cm) and a wavelength close to that of the D 1 and D 2 transitions of the rubidium atom (5S 1/2 → 5P 3/2 or 5S 1/2 → 5P 1/2 , λ D1 = 780 nm, λ D2 = 795 nm), which has passes through rubidium vapor with density (10 11 -10 14 cm −3) been studied theoretically. The system of equations describing the processes of Collisional ionization and multiphoton ionization of rubidium vapour resonantly excited with nanosecond pulsed laser is solved. The dependence of the ion density on the laser intensity and the atomic density of rubidium are considered. The result of calculations revealed that, both quadratic ion density dependence on laser intensity and linear behaviour of the ion density versus rubidium density for 5S 1/2 → 5P 3/2 transition is due to photoioization process. In contrast, for 5S 1/2 → 5P 1/2 transition, the ion density dependence is nonlinear and indicates that the collisional processes play the major contribution in the total ionization. Also, the obtained results showed reasonable agreement with the experimentally measured values of the ion density dependence given by Bakhramov et al. In addition, the analysis of mutual competition between the different ionization processes considered for the ion yield as a function of both laser intensity and atoms density are also presented this work.

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Section: −3mentioning

confidence: 99%

Computational Study of Resonantly Ionizing Rubidium Vapor by Nanosecond Laser Pulses

Mahmoud¹,

Gamal²

2012

JMP

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“…The results are best represented on a triangular diagram for the densities (figure 1). This leads to population inversions (Bobin & Zaibi 1985) in the early stages of the interaction. an almost complete ionization.…”

Section: Dns Dtmentioning

confidence: 99%

Spectral diagnostic of a resonantly laser created plasma

et al. 1990

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Plasma creation occurs when the frequency of a tunable dye laser is adjusted to the 589 nm D-doublet of the sodium atom. Occurrence and Stark broadening of emission lines in the fluorescence light are used as diagnostics. The time history of the electron density and temperature is inferred from these measurements. The peak electron density was found to be above 5-10 16 cm" 3 with a temperature lower than 1 eV.

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