Aluminum multicharged ion generation from femtosecond laser plasma

Shaim, Md. Haider A.; Wilson, Frederick; Elsayed-Ali, Hani E.

doi:10.1063/1.4983008

Cited by 12 publications

(6 citation statements)

References 46 publications

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“…Applying a negative potential to a gold target was shown to increase ultraviolet line emission from the laser plasma produced by a KrF excimer laser, which was attributed to electric field enhanced recombination near the target surface. 31 We extend our previous work on Al laser MCI generation 29,32 through a combined ion TOF measurement and OES of the laser plasma. The double-layer potential generated at the plasma-vacuum interface is estimated from the deconvolution of the TOF ion signal into individual ion species.…”

Section: Introductionmentioning

confidence: 66%

Characterization of laser-generated aluminum plasma using ion time-of-flight and optical emission spectroscopy

Shaim

Elsayed-Ali

2017

Journal of Applied Physics

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Laser plasma generated by ablation of an Al target in vacuum is characterized by ion time-of-flight combined with optical emission spectroscopy. A Q-switched Nd:YAG laser (wavelength k ¼ 1064 nm, pulse width s $ 7 ns, and fluence F 38 J/cm 2) is used to ablate the Al target. Ion yield and energy distribution of each charge state are measured. Ions are accelerated according to their charge state by the double-layer potential developed at the plasma-vacuum interface. The ion energy distribution follows a shifted Coulomb-Boltzmann distribution. Optical emission spectroscopy of the Al plasma gives significantly lower plasma temperature than the ion temperature obtained from the ion time-of-flight, due to the difference in the temporal and spatial regions of the plasma plume probed by the two methods. Applying an external electric field in the plasma expansion region in a direction parallel to the plume expansion increases the line emission intensity. However, the plasma temperature and density, as measured by optical emission spectroscopy, remain unchanged.

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Section: Introductionmentioning

confidence: 66%

Characterization of laser-generated aluminum plasma using ion time-of-flight and optical emission spectroscopy

Shaim

Elsayed-Ali

2017

Journal of Applied Physics

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“…This increasing trend is due to more laser energy deposition and enhanced collision efficiency of ejected species [3]. The energy distribution of ions is highly dependent on the laser intensity.…”

Section: Kinetic Energy (Ke) Measurements Of Ag Plasma Ionsmentioning

confidence: 99%

“…LIP is one of the best sources of electrons, ions and x-rays [2]. High-energy ions can be used effectively in material processing [3], ion implantation [4], surface modification [5] and thin-film deposition [6]. The laser-induced ion-treated surface provides a great control towards the attainment of required material after its physical and chemical alterations for particular applications.…”

Section: Introductionmentioning

confidence: 99%

Energy and flux measurements of laser-induced silver plasma ions by using Faraday cup

Bhatti¹,

Bashir²,

Hayat³

et al. 2021

Plasma Sci. Technol.

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Silver (Ag) plasma has been generated by employing Nd:YAG laser (532 nm, 6 ns) laser irradiation. The energy and flux of ions have been evaluated by using Faraday cup (FC) using time of flight (TOF) measurements. The dual peak signals of fast and slow Ag plasma ions have been identified. Both energy and flux of fast and slow ions tend to increase with increasing irradiance from 7 GW cm−2 to 17.9 GW cm−2 at all distances of FC from the target surface. Similarly a decreasing trend of energies and flux of ions has been observed with increasing distance of FC from the target. The maximum value of flux of the fast component is 21.2 × 1010 cm−2, whereas for slow ions the maximum energy and flux values are 8.8 keV, 8.2 × 1012 cm−2 respectively. For the analysis of plume expansion dynamics, the angular distribution of ion flux measurement has also been performed. The overall analysis of both spatial and angular distributions of Ag ions revealed that the maximum flux of Ag plasma ions has been observed at an optimal angle of ∼15°. In order to confirm the ion acceleration by ambipolar field, the self-generated electric field (SGEF) measurements have also been performed by electric probe; these SGEF measurements tend to increase by increasing laser irradiance. The maximum value of 232 V m−1 has been obtained at a maximum laser irradiance of 17.9 GW cm−2.

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“…The formation of multiply charged ions is associated with the absorption of most of the laser radiation energy in the plasma and gradual ionization due to a decrease in the ablation rate with an increase in the laser radiation power density [13]. Creating multiply charged high-order ions is possible using ultrashort fs-pulsed laser radiation, which has a low light flux compared to short ns-pulsed laser radiation [14,15]. The time evolution of the formation of multiply charged ions under the action of ns and fs pulsed laser radiation on carbon was studied [16,17].…”

Section: Introductionmentioning

confidence: 99%

Spectra of Multiply Charged Ions in Laser Plasma Formed from Gas-Containing Targets

Japakov,

Vapaev,

Bedilov

et al. 2023

East Eur. J. Phys.

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The paper presents the results of a study of the charge and energy characteristics of multiply charged ions excited on the surface of a single-element and hydrogen-containing multi-component element targets under the influence of laser radiation with a power density (q=108-1012 W/cm2). It has been experimentally shown that, for all used values of q laser radiation, laser-induced plasma from gas-containing targets is characterized by a lower relative yield (dN/dE) of multi-charged ions with a charge number of Z>+3, compared to the plasma produced on the surface of the single element target. Moreover, the tendency to reduce dN/dE of multi-charged ions of the multi-element target, in comparison with the relative yield of ions from the plasma of the single-element target, is more significant and it depends on the charge of the excited ions. The increase in the charge and energy state, duration, and yield of ions of the heavy component, which occurs with an increase in the content of the light component in the target, has been established. This is explained by a decrease in the efficiency of recombination processes caused by an increase in the expansion velocity of a plasma plume due to a decrease in its average mass.

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Aluminum multicharged ion generation from femtosecond laser plasma

Cited by 12 publications

References 46 publications

Characterization of laser-generated aluminum plasma using ion time-of-flight and optical emission spectroscopy

Characterization of laser-generated aluminum plasma using ion time-of-flight and optical emission spectroscopy

Energy and flux measurements of laser-induced silver plasma ions by using Faraday cup

Spectra of Multiply Charged Ions in Laser Plasma Formed from Gas-Containing Targets

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