Effect of Lattice Structure on Energetic Electron Transport in Solids Irradiated by Ultraintense Laser Pulses

McKenna, P.; Robinson, A. P. L.; Neely, D.; Desjarlais, M. P.; Carroll, D. C.; Quinn, M. N.; Yuan, Xiaohui; Brenner, C. M.; Burza, Matthias; Coury, M.; Gallegos, P.; Gray, R. J.; Lancaster, K. L.; Li, Y. T.; Lin, Xiaona; Tresca, O.; Wahlström, Claes‐Göran

doi:10.1103/physrevlett.106.185004

Cited by 64 publications

(56 citation statements)

References 15 publications

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“…18 This approach could also enable efficient generation of energetic electrons in a solid-density material reducing pre-heating, allowing studies of transport in warm dense matter 19 and dependence on the crystalline structure. 20 We also show via our simulations that the SPW excitation enhances the generation of a quasi-static magnetic field near the plasma surface, possibly leading to higher field values with respect to other known mechanisms. 21 These latter include nonparallel electron density gradient and temperature, 22 the radiation pressure associated with the laser itself, 9 and/or the current of fast electrons generated during the interaction.…”

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confidence: 50%

Efficient laser-overdense plasma coupling via surface plasma waves and steady magnetic field generation

et al. 2011

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The efficiency of laser overdense plasma coupling via surface plasma wave excitation is investigated. Two-dimensional particle-in-cell simulations are performed over a wide range of laser pulse intensity from 10 15 to 10 20 W cm À2 lm 2 with electron density ranging from 25 to 100n c to describe the laser interaction with a grating target where a surface plasma wave excitation condition is fulfilled. The numerical studies confirm an efficient coupling with an enhancement of the laser absorption up to 75%. The simulations also show the presence of a localized, quasi-static magnetic field at the plasma surface. Two interaction regimes are identified for low (

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Efficient laser-overdense plasma coupling via surface plasma waves and steady magnetic field generation

et al. 2011

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“…2c). As discussed in McKenna et al (2011), this structure arises due to filamentation of the fast electron beam during propagation through the target, giving rise to multiple hot-spots in the fast electron density distribution, and thus multiple regions of high proton emission within the sheath. The proton front from these sources overlap downstream in the detector plane giving rise to the measured cusp-like features across the beam.…”

Section: Experimental Setup and Resultsmentioning

confidence: 99%

Fast electron transport patterns in intense laser-irradiated solids diagnosed by modeling measured multi-MeV proton beams

et al. 2013

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The measured spatial-intensity distribution of the beam of protons accelerated from the rear side of a solid target irradiated by an intense (>10 19 Wcm −2 ) laser pulse provides a diagnostic of the two-dimensional fast electron density profile at the target rear surface and thus the fast electron beam transport pattern within the target. An analytical model is developed, accounting for rear-surface fast electron sheath dynamics, ionization and projection of the resulting beam of protons. The sensitivity of the spatial-intensity distribution of the proton beam to the fast electron density distribution is investigated. An annular fast electron beam transport pattern with filamentary structure is inferred for the case of a thick diamond target irradiated at a peak laser intensity of 6 × 10 19 Wcm −2 .

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“…Proton beam parameters such as emittance, opening angle, spatial beam profile, energy spectrum, and maximum energy cutoff are sensitive to the electron energy distribution function (EEDF) [55,56], electron transport properties [57][58][59], direction of the incoming laser wave and its phase front [60,61] as well as target geometry [20,62,63] or size [64][65][66][67][68][69]. We have focused on the target geometry and laser incidence angle, as it can be easily changed without any changes to the laser infrastructure.…”

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confidence: 99%

Z-petawatt driven ion beam radiography development.

Schollmeier¹,

Geißel²,

Rambo³

et al. 2013

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Laser-driven proton radiography provides electromagnetic field mapping with high spatiotemporal resolution, and has been applied to many laser-driven High Energy Density Physics (HEDP) experiments. Our report addresses key questions about the feasibility of ion radiography at the Z-Accelerator ("Z"), concerning laser configuration, hardware, and radiation background. Charged particle tracking revealed that radiography at Z requires GeV scale protons, which is out of reach for existing and near-future laser systems. However, it might be possible to perform proton deflectometry to detect magnetic flux compression in the fringe field region of a magnetized liner inertial fusion experiment. Experiments with the Z-Petawatt laser to enhance proton yield and energy showed an unexpected scaling with target thickness. Full-scale, 3D radiation-hydrodynamics simulations, coupled to fully explicit and kinetic 2D particle-in-cell simulations running for over 10 ps, explain the scaling by a complex interplay of laser prepulse, preplasma, and ps-scale temporal rising edge of the laser.4

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Effect of Lattice Structure on Energetic Electron Transport in Solids Irradiated by Ultraintense Laser Pulses

Cited by 64 publications

References 15 publications

Efficient laser-overdense plasma coupling via surface plasma waves and steady magnetic field generation

Efficient laser-overdense plasma coupling via surface plasma waves and steady magnetic field generation

Fast electron transport patterns in intense laser-irradiated solids diagnosed by modeling measured multi-MeV proton beams

Z-petawatt driven ion beam radiography development.

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