Time- and space-resolved spectroscopic characterization of laser-induced swine muscle tissue plasma

Camacho, J.J.; Díaz, Luis Eduardo; Martínez-Ramírez, S.; Cáceres, J. O.

doi:10.1016/j.sab.2015.07.008

Cited by 21 publications

(11 citation statements)

References 62 publications

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“…Different authors [17][18][19][20][21][22][23][24][25][26][27][28][29][30] have previously described this kind of study. In order to study the plasma-plume expansion dynamics of different species, we plotted spectrally resolved 1D-spatial and 1D-spectral imaging mode for different delay times.…”

Section: Oes Analysismentioning

confidence: 99%

Imaging spectroscopy of Ag plasmas produced by infrared nanosecond laser ablation

Camacho

Oujja

Sanz

et al. 2019

J. Anal. At. Spectrom.

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Section: Oes Analysismentioning

confidence: 99%

Imaging spectroscopy of Ag plasmas produced by infrared nanosecond laser ablation

Camacho

Oujja

Sanz

et al. 2019

J. Anal. At. Spectrom.

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“…The spectra were taken at a delay time of 100 ns and pulse energy of 350 mJ. The characteristic intensity of the Mg emission rapidly decreases with a larger delay time, due to bremsstrahlung emission and radiative recombination between the ions and electrons [25], and this is as a result of plasma quenching. At a delay time of 100 ns, a strong continuum is observed.…”

Section: The Spectra Of the Magnesium-induced Plasmamentioning

confidence: 99%

Influence of laser energy on the electron temperature of a laser-induced Mg plasma

Asamoah

Yao

2016

Appl. Phys. B

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radiations in this process are used for the identification of the elemental composition of the sample [7][8][9].LIBS offers many advantages over other spectroscopic techniques such as mass spectroscopy, electrode spark and inductively coupled plasma. Some of LIBS unique advantages include the ability to make in situ analysis even in hostile environment, remote sensing, little or no preparation of the sample, and multi-element analysis [10][11][12]. Based on these advantages, LIBS has been extensively investigated on several samples including liquids [13], gases [14] and as well from non-conducting and conducting solids [15].LIBS is also a spectroscopic technique for the determination of the density of electron, electron temperature and number densities of the plasma plume [16,17]. Laserinduced plasma temperatures are influenced by various experimental conditions such as ambient surrounding, laser energy and laser pulse width. Most of the studies on LIBS temperatures report that the plasma temperature tends to increase with increasing laser energy, pulse width, laser wavelength and ambient pressure [18][19][20][21].Although LIBS has been employed successfully in several experimental and theoretical works, to analyze the spectroscopic composition of the samples, there are still many aspects which need to be investigated [6]. For example, Barthelemy et al. [22] investigated the influence of the laser parameters of an aluminum-induced plasma. They reported that the temperature slightly decreases at the plasma edge and close to the aluminum surface. This decrease in temperature at the plasma edge is basically caused by radiative cooling, while the decrease in temperature at the aluminum surface is as a result of thermal conduction. The authors also found that at the first microsecond of the ablation plume, the electron density was spatially homogeneous.Zhang et al.[23] also reported on the influence of laser parameters on plasma temperature. Their results predicted Abstract The magnesium plasma induced by a 1064-nm Q-switched Nd:YAG laser in atmospheric air was investigated. The evolution of the plasma was studied by acquiring spectral images at different laser energies and delay times. We observed that the intensities of the spectral lines decrease with larger delay times. The electron temperature was determined using the Boltzmann plot method. At a delay time of 100 ns and laser energy of 350 mJ, the electron temperature attained their highest value at 10164 K and then decreases slowly up to 8833.6 K at 500 ns. We found that the electron temperature of the magnesium plasma increases rapidly with increasing laser energy.

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“…Other elements such as H (impossible to detect by EDX), Mg, and Ca were observed by LIBS. 22,23 The concentrations of all elements agree with the composition of a dehydrated animal tissue. The minimum detection limit of an EDX analyzer is approximately 0.1% for elements with Z >10 and about 1.0 wt.…”

Section: Ambient Air Effects On Crater Profilesmentioning

confidence: 58%

“…Recent studies have described a complicated plume-background gas interaction which is characterized by several propagation phases and plume oscillations. 20,21 In recent studies 22 we have studied the emission spectra, electron density, and temperature of laser ablation plumes on swine muscle tissues from spatial and temporal point of view.…”

Section: Introductionmentioning

confidence: 99%

Plume Dynamics of Laser-Produced Swine Muscle Tissue Plasma

et al. 2016

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We report on the plume dynamics of the plasma induced by laser ablation of a swine skeletal muscle tissue sample in different vacuum conditions. Pulses from a transversely excited atmospheric CO2 laser were focused onto a target sample and the induced plasma was allowed to expand in different air pressures. The expansion features were studied using fast photography of the overall visible emission by using a gated intensified charged coupled device. Free expansion and plume splitting were observed at different pressure levels. The expansion of the plasma plume front was analyzed using various expansion models and the velocity of the plume front was estimated. The effect of the number of accumulated laser shots on the crater volume at different ambient air pressures and an elemental analysis of the sample were performed using scanning electron microscopy coupled with energy dispersive X-ray spectroscopy (EDX) analysis. The surface morphology of the irradiated surface showed that increasing the pressure of the ambient gas decreased the ablated mass, or in other words it reduced significantly the laser-target coupling.

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Time- and space-resolved spectroscopic characterization of laser-induced swine muscle tissue plasma

Cited by 21 publications

References 62 publications

Imaging spectroscopy of Ag plasmas produced by infrared nanosecond laser ablation

Imaging spectroscopy of Ag plasmas produced by infrared nanosecond laser ablation

Influence of laser energy on the electron temperature of a laser-induced Mg plasma

Plume Dynamics of Laser-Produced Swine Muscle Tissue Plasma

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