Energetic ions at moderate laser intensities using foam-based multi-layered targets

Passoni, M.; Zani, Alessandro; Sgattoni, A.; Dellasega, David; Macchi, Andrea; Prencipe, Irene; Floquet, V.; Martin, Philippe; Liseykina, T. V.; Ceccotti, T.

doi:10.1088/0741-3335/56/4/045001

Cited by 51 publications

(55 citation statements)

References 18 publications

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“…Ion acceleration with these targets relies on an efficient volumetric heating in the low-density layer [37][38][39][40] combined with a neat charge separation granted by the solid foil. Under suitable conditions [19,[22][23][24], a significant enhancement of both total accelerated charge and maximum ion energy has been observed. Interaction with these FIG.…”

Section: B Multilayer Targetmentioning

confidence: 96%

“…This is, however, not straightforward and is especially challenging if we consider innovative target designs that have been proposed and studied in recent years [16][17][18][19][20][21]. Among them, multilayered targets (MLTs) created by the deposition of a low-density foam on the irradiated surface of a solid target have been proven to be interesting both theoretically and experimentally [22][23][24].…”

Section: Introductionmentioning

confidence: 99%

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Electron heating in subpicosecond laser interaction with overdense and near-critical plasmas

2016

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In this work we investigate electron heating induced by intense laser interaction with micrometric flat solid foils in the context of laser-driven ion acceleration. We propose a simple law to predict the electron temperature in a wider range of laser parameters with respect to commonly used existing models. An extensive two-dimensional (2D) and 3D numerical campaign shows that electron heating is due to the combined actions of j × B and Brunel effect. Electron temperature can be well described with a simple function of pulse intensity and angle of incidence, with parameters dependent on pulse polarization. We then combine our model for the electron temperature with an existing model for laser-ion acceleration, using recent experimental results as a benchmark. We also discuss an exploratory attempt to model electron temperature for multilayered foam-attached targets, which have been proven recently to be an attractive target concept for laser-driven ion acceleration.

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Section: B Multilayer Targetmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Electron heating in subpicosecond laser interaction with overdense and near-critical plasmas

2016

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“…We will introduce an aerogel-like layer on the front side of the target [38,39] and compare this design with a standard solid density foil of optimum thickness for the same laser energy, focal spot size, and pulse duration. The aerogel layer with thickness of 3 μm consists of carbon ions and electrons.…”

Section: The Role Of a Low-density Coatingmentioning

confidence: 99%

Ion energy scaling under optimum conditions of laser plasma acceleration from solid density targets

Brantov

Govras

Bychenkov

et al. 2015

Phys. Rev. ST Accel. Beams

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A new, maximum proton energy, ε, scaling law with the laser pulse energy, E L , has been derived for solid density foils from the results of 3D particle-in-cell simulations. Utilizing numerical modeling, protons are accelerated during interactions of the femtosecond relativistic laser pulses with the plain semitransparent targets of optimum thickness. The scaling, ε ∼ E 0.7 L , has been obtained for the wide range of laser energies, different spot sizes, and laser pulse durations. Our results show that the proper selection of foil target optimum thicknesses results in a very promising increase of the proton energy with the laser intensity even in the range of parameters below the radiation pressure (light sail) regime. The proposed analytical model is consistent with numerical simulations.

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“…Since modern technologies enable one to manufacture low-density plane targets (made of aerogels or nanoporous materials) the plasma of which has the electron density from several to a few dozens of the critical densities [16], the question arises as to whether the use of such targets will allow one to achieve a more efficient acceleration. In the present work, we give a positive answer to this question and prove that the energy of accelerated ions can be increased by using targets with an electron density on the order of the relativistic critical density ( ).…”

Section: Introductionmentioning

confidence: 99%

On the feasibility of increasing the energy of laser-accelerated protons by using low-density targets

Brantov

Bychenkov

2015

Plasma Phys. Rep.

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Optimal regimes of proton acceleration in the interaction of short high-power laser pulses with thin foils and low-density targets are determined by means of 3D numerical simulation. It is demonstrated that the maximum proton energy can be increased by using low-density targets in which ions from the front surface of the target are accelerated most efficiently. It is shown using a particular example that, for the same laser pulse, the energy of protons accelerated from a low-density target can be increased by one-third as compared to a solid-state target.

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Energetic ions at moderate laser intensities using foam-based multi-layered targets

Abstract: Energetic ions at moderate laser intensities using foam-based multi-layered targets. Plasma Physics and Controlled Fusion, 56(4): 045001http://dx

Cited by 51 publications

References 18 publications

Electron heating in subpicosecond laser interaction with overdense and near-critical plasmas

Electron heating in subpicosecond laser interaction with overdense and near-critical plasmas

Ion energy scaling under optimum conditions of laser plasma acceleration from solid density targets

On the feasibility of increasing the energy of laser-accelerated protons by using low-density targets

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