Study of Laser Plasmas Dynamics Through Real and Virtual Langmuir Probes

Gambino, N.; Tudisco, S.; Anzalone, A.; Gammino, S.; Musumeci, F.; Spitaleri, A.

doi:10.1109/tps.2013.2281115

Cited by 6 publications

(2 citation statements)

References 16 publications

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“…During the initial stage of the expansion of a laser-produced plasma, the electronic component can be diagnosed by highspeed optical interferometry (Bychenkov et al, 1977;Atwood et al, 1978) and by Langmuir probe localized in the electron expansion region (von Gutfeld & Dreyfus, 1989;Gambino et al, 2013). The measurements of the target polarization and the target return current versus laser intensity and target properties give information on escaping electrons generated in the interaction of laser pulses with solid targets (Mendel & Olsen, 1975;Pearlman & Dahlbacka, 1977;Benjamin et al, 1979;Bialkowski et al, 1990;Cikhardt et al, 2014;Dubois et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Characteristics of target polarization by laser ablation

et al. 2015

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Experimental results are obtained concerning the target polarization, which aptly characterizes the laser ablation. The charge separation in the laser-produced plasma, structure of the ion front, and the current of fast electrons expanding into the vacuum chamber ahead of ions are of crucial importance for the interpretation of multi-peak structure of target currents appearing much later than the laser pulse. Of particular interest is the correlation between the partial maxima in the time-resolved target current and the square root of mass number of ionized species. The late-time negative charging of targets provides evidence for production of very slow ions by ionization of neutrals ablated at the target crater by radiation from plasma produced by 23 ns excimer krypton fluoride laser.Keywords: Target current in laser-produced plasmas; positive and negative target polarization; space structure of ion front

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Section: Introductionmentioning

confidence: 99%

Characteristics of target polarization by laser ablation

et al. 2015

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“…This acceleration is due to an electrostatic field that is generated by the nonhomogeneous motion of electrons and ions. 7,[30][31][32][33][34][35][36] It is interesting to consider the simple case of a plasma in a slab with quasi-neutral assumption: the number of ions N i esc that would escape from the slab of a given temperature and number density is given by N i esc /N i ¼ r D /L, where r D is the Debye length of the plasma and L is the plume dimension. 31 For the number density and temperature of the emission dominant region (EDR) and for a laser irradiance of 2 Â 10 11 W/cm 2 , N i esc is on the order 10 À5 N i .…”

Section: Model Descriptionmentioning

confidence: 99%