Double layers in laser-produced plasmas

Eliezer, S.; Hora, Heinrich; Ludmirsky, A.; Loeb, Abraham; Arad, B.; Borowitz, A.; Gazit, Y.; Jäckel, S.; Krumbein, A. D.; Salzmann, David; Szichman, H.; Givon, M.; Zigler, A.

doi:10.1016/0370-1573(89)90118-x

Cited by 103 publications

(71 citation statements)

References 116 publications

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“…Note however that S is much more volatile (by two orders of magnitude), which can also explain the different behavior evidenced above. Nevertheless, the multiple maxima present in the temperature and electronic density profiles reveal a complex behavior of the plasma plume, probably driven by (excitation/ionization/recombination) collisions and electric interactions, leading to the idea of double-layer formation and self-structuring, as evidenced previously in [29][30][31]. Complementary investigations by electrical methods (Langmuir probes and time-of-flight mass spectrometry) are envisaged in order to validate or reject this hypothesis.…”

Section: Resultsmentioning

confidence: 74%

Plasma diagnostics in pulsed laser deposition of GaLaS chalcogenides

Pompilian¹,

Gurlui²,

Němec³

et al. 2013

Applied Surface Science

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The aim of this work is to characterize the ejection plume obtained by laser ablation of GaLaS (GLS) samples in order to better understand the ablation phenomena for optimizing the pulsed laser deposition of chalcogenide thin films. The dynamics of the plasma between target and substrate was investigated through timeand space-resolved optical emission spectroscopy. High-resolution optical spectra have been recorded in the UV-VIS range using a 500-mm focal length monochromator and a fast gate ICCD camera. From the space-time evolution of the optical signals, the velocities of various species (including neutrals and ions) have been derived. Using the relative intensity method, the space-and time-evolution of the excitation temperature and electronic density have been determined. A complex behavior of the laser ablation plasma has been revealed.

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Section: Resultsmentioning

confidence: 74%

Plasma diagnostics in pulsed laser deposition of GaLaS chalcogenides

Pompilian¹,

Gurlui²,

Němec³

et al. 2013

Applied Surface Science

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“…We claim that "stationary" double layers do not accelerate charged particles as stated in (Bryant et al 1992) while "nonstationary" double layers can accelerate as seems to be the case in Knorr and Goerz (1974), Goerz (1979), Alfven (1981Alfven ( , 1988, Falthammer et al (1987), and Peratt (1988). In this paper, we demonstrate that a laser-produced double layer (Eliezer & Hora 1989) can accelerate electrons.…”

Section: Introductionmentioning

confidence: 51%

“…The appearance of double layers in laser produced plasmas (Eliezer & Hora 1989;Hora 1991) was related to the question of the generation of anomalously energetic ions and the action of the nonlinear force. Linlor (1963) had observed keV ions at laser irradiation with powers above (the threshold of about) 1 MW contrary to the few eV (thermal) ions below 1 MW power.…”

Section: Introductionmentioning

confidence: 99%

How double layers accelerate charged particles

Eliezer

Kolka²,

Szichman³

et al. 1995

Laser Part. Beams

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After the theory of dynamic double layers in laser-produced plasmas arrived at several significant results in agreement with measurement, including particle acceleration, a clarification was given to the paper by Bryant et al. (1992) negating such acceleration. The discrepancy seems to be in the definition of static double layers in contradiction with dynamic double layers that are created in laser-induced plasma. We present here new results on the acceleration of electrons in a laser-irradiated plasma by double layer mechanisms. A simple analytical example is given.

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“…In this domain of laser intensities the force acts on the electrons that are accelerated and the ions that follow accordingly. This model describes our piston model [37,38] as summarized schematically in Fig Figure 2(b) the system of the negative and positive layers is called a double layer (DL), n e and n i are the electron and ion densities respectively, E x is the electric field, λ DL is the distance between the positive and negative DL charges, and δ is the solid density skin depth of the foil. The DL is geometrically followed by a neutral plasma where the electric field decays within a skin depth and a shock wave is created.…”

Section: Laser-induced Shock Wavesmentioning

confidence: 99%

Ultrafast ignition with relativistic shock waves induced by high power lasers

Eliezer

Nissim²,

Pinhasi³

et al. 2014

High Pow Laser Sci Eng

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In this paper we consider laser intensities greater than 10 16 W cm −2 where the ablation pressure is negligible in comparison with the radiation pressure. The radiation pressure is caused by the ponderomotive force acting mainly on the electrons that are separated from the ions to create a double layer (DL). This DL is accelerated into the target, like a piston that pushes the matter in such a way that a shock wave is created. Here we discuss two novel ideas. Firstly, the transition domain between the relativistic and non-relativistic laser-induced shock waves. Our solution is based on relativistic hydrodynamics also for the above transition domain. The relativistic shock wave parameters, such as compression, pressure, shock wave and particle flow velocities, sound velocity and rarefaction wave velocity in the compressed target, and temperature are calculated. Secondly, we would like to use this transition domain for shockwave-induced ultrafast ignition of a pre-compressed target. The laser parameters for these purposes are calculated and the main advantages of this scheme are described. If this scheme is successful a new source of energy in large quantities may become feasible.

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Double layers in laser-produced plasmas

Cited by 103 publications

References 116 publications

Plasma diagnostics in pulsed laser deposition of GaLaS chalcogenides

Plasma diagnostics in pulsed laser deposition of GaLaS chalcogenides

How double layers accelerate charged particles

Ultrafast ignition with relativistic shock waves induced by high power lasers

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