Analysis of time-of-flight spectra of ions emitted from laser-generated plasmas

Krása, J.; Jungwirth, K.; Krouský, E.; Láska, L.; Rohlena, K.; Ullschmied, J.; Velyhan, A.

doi:10.1080/10420150701778080

Cited by 4 publications

(3 citation statements)

References 21 publications

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“…The expansion of laser-produced plasma primarily depends on the velocity distribution of the expanding ion species (Stritzker et al, 1981;Kelly & Dreyfus, 1988). As it was presented elsewhere (Kra ´sa et al, 2008), the response of IC to an impacting ion current can be expressed in the form…”

Section: Ions Produced At Low Laser Intensitymentioning

confidence: 99%

“…For the precise description of this phenomenon, it would be necessary to determine the particular currents of all the emitted ion species or to retrieve these particular currents by a mathematical deconvolution method of IC signal, i.e., TOF spectrum, based on Eqs. ( 3) and ( 5) (Kra ´sa et al, 2007(Kra ´sa et al, , 2008.…”

Section: Ions Produced At Low Laser Intensitymentioning

confidence: 99%

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Angular distributions of ions emitted from laser plasma produced at various irradiation angles and laser intensities

et al. 2008

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Angular distributions of currents and velocities (energies) of ions produced at various target irradiation angles and laser intensities ranged from 1010 W/cm2 to 1017 W/cm2 were analyzed. It was confirmed that for low laser intensities the ion current distributions are always peaked along the target normal. However, at laser intensities comparable to or higher than 1014 W/cm2, the preferred direction of ion emission strongly depends on the irradiation geometry (laser focus setting, the irradiation angle), and can be off the target normal. This is very likely caused by the non-linear interaction of the laser beam with produced plasma, in particular, by the action of ponderomotive forces and the laser beam self-focusing.

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Section: Ions Produced At Low Laser Intensitymentioning

confidence: 99%

Section: Ions Produced At Low Laser Intensitymentioning

confidence: 99%

Angular distributions of ions emitted from laser plasma produced at various irradiation angles and laser intensities

et al. 2008

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“…Some authors are working on deconvoluting t.o.f. spectra to obtain KEDs [26]; but a convergence of results has not yet been achieved.…”

Section: Methodsmentioning

confidence: 99%

Ion energy distributions in laser-produced plasmas with two collinear pulses

Apiñaniz¹,

Gordillo‐Vázquez²,

Martı́nez³

2012

Plasma Sources Sci. Technol.

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The formation and expansion dynamics of laser-produced plasmas was studied by means of the effect of a second delayed laser pulse upon the ion kinetic energy of the plasma created by the first one. Two types of measurements were carried out: ion kinetic energy distributions and overall ion time of flight (t.o.f.). Ion energy distributions were obtained with an electrostatic energy analyser, which allowed the observation of the energy distributions of each charge state separately while the ion t.o.f. signal was measured with an ion probe. Laser power densities ranged from 2 × 10 8 to 2 × 10 9 W cm −2 with 532 nm photons, and studies were extended to Al, Cu and Co targets. The effects of the second laser pulse on the plasma created by the first were very different depending on the interpulse delay. At low delays (from 0 to 10 ns) the second pulse produced an increase of the plasma average charge state and the maximum ion kinetic energy, while at higher delays (>20 ns) it produced a strong enhancement on the low charge yield (especially the single-charge ions) leaving unaltered the energies and yields of the high charges. An analysis of variations in both ion yield and kinetic energy produced interesting results regarding fundamental understanding of plasma formation and expansion dynamics, as well as possible improvements in technological applications based on laser-produced plasmas.

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