X-ray spectroscopic studies of hot, dense iron plasma formed by subpicosecond high intensity KrF laser irradiation

Nazir, K; Rose, S. J.; Djaoui, A.; Tallents, G. J.; Holden, M.; Norreys, P. A.; Fews, P.; Zhang, J.; Failles, F.

doi:10.1063/1.117189

Cited by 48 publications

(33 citation statements)

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“…Very recently, Shuji et al [29] have calculated the radiative opacity of the Al plasma in LTE by using the time-dependent density-functional theory (TDDFT) at temperature T = 20 eV and density 0.01 g/cm 3 . The strongly coupled plasma is mostly seen in the highly evolved stars, interior of the Jovian planets, explosive shock tubes, laser produced plasma and inertial confinement fusion plasmas [4,[30][31][32]. Most of these studies have been carried out in the Debye model formalism.…”

Section: Introductionmentioning

confidence: 99%

Plasma screening effects on the electronic structure of multiply charged Al ions using Debye and ion-sphere models

2016

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We analyze atomic structures of plasma embedded aluminum (Al) atom and its ions in the weakly and strongly coupling regimes. The plasma screening effects in these atomic systems are accounted for using the Debye and ion sphere (IS) potentials for the weakly coupling and strongly coupling plasmas, respectively. Within the Debye model, special attention is given to investigate the spherical and non-spherical plasma-screening effects considering in the electron-electron interaction potential. The relativistic coupled-cluster (RCC) method has been employed to describe the relativistic and electronic correlation effects in the above atomic systems. The variation in the ionization potentials (IPs) and excitation energies (EEs) of the plasma embedded Al ions are presented. It is found that the atomic systems exhibit more stability when the exact screening effects are taken into account. It is also showed that in the presence of strongly coupled plasma environment, the highly ionized Al ions show blue and red shifts in the spectral lines of the transitions between the states with same and different principal quantum numbers, respectively. Comparison among the results obtained from the Debye and IS models are also carried out considering similar plasma conditions.

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Section: Introductionmentioning

confidence: 99%

Plasma screening effects on the electronic structure of multiply charged Al ions using Debye and ion-sphere models

2016

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“…The iron plasma conditions are estimated using 2D fluid code simulations. With this technique, it is possible to record the opacity of colder material, where emission is too weak for single beam opacity measurements utilising Kirchhoff's Law [7].…”

Section: Introductionmentioning

confidence: 99%

“…Some single laser beam plasma opacity measurements have been undertaken using recorded emission from buried layer targets. Here the plasma is assumed to be in LTE and Kirchhoff's Law is used to infer opacity from the emissivity [7]. Future techniques could involve the use of free electron lasers to investigate opacity.…”

Section: Introductionmentioning

confidence: 99%

X-ray back-lighter characterization for iron opacity measurements using laser-produced aluminium K-alpha emission

Rossall

Gartside

Chaurasia

et al. 2010

J. Phys. B: At. Mol. Opt. Phys.

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Aluminium K α emission (1.5 keV) produced by an 8 J, 500 ps, Nd:Glass laser incident at 45° onto a layered target of 0.8 µm thick aluminium (front side) and 1µm thick iron (back side) has been used to probe the opacity of iron plasma. Source broadened spectroscopy and continuum emission analysis shows that whole beam self focussing within the aluminium plasma results in a two temperature spatial distribution. Thermal conduction from the laser-irradiated aluminium into the iron layer, enhanced by the whole beam self focusing, results in iron at a temperature of ~ 10 -150 eV. The iron opacity at photon energy of 1.5 keV is shown to be strongly modified from cold values in agreement with IMP code opacities. Results presented here represent a feasibility study to seed future work using table top laser systems for plasma opacity experiments.

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“…These quantities are fundamental to the modelling of stellar interiors [3] and in the design of inertial confinement fusion schemes [4]. With the advent of high power short pulse lasers measurements to test the validity of models of dense plasma properties and spectral synthesis have been possible near solid density [5][6][7][8][9][10]. On the Orion laser system at AWE in the UK a combination of very high contrast short pulse, 0.7ps, laser heating and compression using long pulse ,0.5ns, beams has allowed the density in these studies to be increased to significantly greater than solid density and the temperature to greater than that found at the solar core.…”

Section: Introductionmentioning

confidence: 99%

Measurements of plasma spectra from hot dense elements and mixtures at conditions relevant to the solar radiative zone

Hoarty¹,

Hill²,

Beiersdörfer³

et al. 2017

AIP Conference Proceedings

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Abstract. X-ray emission spectroscopy has been used to study hot dense plasmas produced using high power laser irradiation of dot samples buried in low Z foils of plastic or diamond. By combining a high contrast short pulse (picosecond timescale) laser beam operating in second harmonic with long pulse (nanosecond timescale) laser beams in third harmonic, and with pulse shaping of the long pulse beams, a range of plasma temperatures from 400eV up to 2.5keV and electron densities from 5e22 up to 1e24/cc have been accessed. Examples are given of measurements of dense plasma effects such as ionization potential depression and line-broadening from the K-shell emission spectra of a range of low Z elements and mixtures and compared to model prediction. Detailed spectra from measurements of the Lshell emission from mid-Z elements are also presented for an example spectrum of germanium. These data are at conditions found in stellar interiors and in particular in the radiative zone of the sun. The plasma conditions are inferred from comparison of the measured spectra to detailed modeling using atomic kinetics and spectral synthesis codes.

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X-ray spectroscopic studies of hot, dense iron plasma formed by subpicosecond high intensity KrF laser irradiation

Cited by 48 publications

References 0 publications

Plasma screening effects on the electronic structure of multiply charged Al ions using Debye and ion-sphere models

Plasma screening effects on the electronic structure of multiply charged Al ions using Debye and ion-sphere models

X-ray back-lighter characterization for iron opacity measurements using laser-produced aluminium K-alpha emission

Measurements of plasma spectra from hot dense elements and mixtures at conditions relevant to the solar radiative zone

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