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

Hoarty, D. J.; Hill, E.G.; Beiersdörfer, P.; Allan, Peter; Brown, Colin; Hill, M. P.; Hobbs, L. M. R.; James, Steven; Morton, John; Sircombe, N J; Upcraft, L.M.; Harris, Julie A.; Shepherd, R.; Marley, E. V.; Magee, E. W.; Emig, J.; Nilsen, J.; Rose, S. J.

doi:10.1063/1.4975721

Cited by 4 publications

(2 citation statements)

References 32 publications

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“…First, radial temperature and density gradients must be taken into consideration in the theoretical models to match the measurements of the time dependent emission spectra. [29,30] However, the hydrodynamic simulation code Multi-1D used in the present simulations does not take the radial gradients into account, and the plasma is described by a uniform temperatureand-density state. Second, the measured streaked spectra are the integration of emissions in the direction of the target thickness, i.e., along the axial direction.…”

Section: Hydrodynamic Simulationsmentioning

confidence: 99%

Time-resolved K-shell x-ray spectra of nanosecond laser-produced titanium tracer in gold plasmas

He¹,

Zhang²,

Yang³

et al. 2023

Chinese Phys. B

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A study of a nanosecond laser irradiation on the titanium-layer-buried gold planar target is presented. The time-resolved x-ray emission spectra of titanium tracer are measured by a streaked crystal spectrometer. By comparing the simulated spectra obtained by using the FLYCHK code with the measured titanium spectra, the temporal plasma states, i.e., the electron temperatures and densities, are deduced. To evaluate the feasibility of using the method for the characterization of Au plasma states, the deduced plasma states from the measured titanium spectra are compared with the Multi-1D hydrodynamic simulations of laser-produced Au plasmas. By comparing the measured and simulated results, an overall agreement for the electron temperatures is found, whereas there are deviations in the electron densities. The experiment-theory discrepancy may suggest that the plasma state could not be well reproduced by the Multi-1D hydrodynamic simulation, in which the radial gradient is not taken into account. Further investigations on the spectral characterization and hydrodynamic simulations of the plasma states are needed. All the measured and FLYCHK simulated spectra are given in this paper as datasets. The datasets are openly available at http://www.doi.org/10.57760/sciencedb.j00113.00032 (https://www.scidb.cn/s/6N3imq).

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Section: Hydrodynamic Simulationsmentioning

confidence: 99%

Time-resolved K-shell x-ray spectra of nanosecond laser-produced titanium tracer in gold plasmas

He¹,

Zhang²,

Yang³

et al. 2023

Chinese Phys. B

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“…For the latter, chirped pulse amplification (CPA) [9] enables petawatt power levels to be focused onto the target with intensities of up to 10 21 W cm −2 . The facility became operational in 2013 and has since been used for a wide range of campaigns [10–12]. About 15% of Orion's time is available for academic-led access, which has led to a rich set of experiments making novel use of Orion's capabilities [13].…”

Section: High-energy-density Physics Experimentsmentioning

confidence: 99%

Inertial confinement fusion: a defence context

Randewich

Lock

Garbett

et al. 2020

Phil. Trans. R. Soc. A.

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Almost 30 years since the last UK nuclear test, it remains necessary regularly to underwrite the safety and effectiveness of the National Nuclear Deterrent. To do so has been possible to date because of the development of continually improving science and engineering tools running on ever more powerful high-performance computing platforms, underpinned by cutting-edge experimental facilities. While some of these facilities, such as the Orion laser, are based in the UK, others are accessed by international collaboration. This is most notably with the USA via capabilities such as the National Ignition Facility, but also with France where a joint hydrodynamics facility is nearing completion following establishment of a Treaty in 2010. Despite the remarkable capability of the science and engineering tools, there is an increasing requirement for experiments as materials age and systems inevitably evolve further from what was specifically trialled at underground nuclear tests (UGTs). The data from UGTs will remain the best possible representation of the extreme conditions generated in a nuclear explosion, but it is essential to supplement these data by realizing new capabilities that will bring us closer to achieving laboratory simulations of these conditions. For high-energy-density physics, the most promising technique for generating temperatures and densities of interest is inertial confinement fusion (ICF). Continued research in ICF by the UK will support the certification of the deterrent for decades to come; hence the UK works closely with the international community to develop ICF science. UK Ministry of Defence © Crown Owned Copyright 2020/AWE. This article is part of a discussion meeting issue ‘Prospects for high gain inertial fusion energy (part 1)'.

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Measurement and simulation of the temperature evolution of a short pulse laser heated buried layer target

Marley

Shepherd

Beiersdörfer

et al. 2017

High Energy Density Physics

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

Cited by 4 publications

References 32 publications

Time-resolved K-shell x-ray spectra of nanosecond laser-produced titanium tracer in gold plasmas

Time-resolved K-shell x-ray spectra of nanosecond laser-produced titanium tracer in gold plasmas

Inertial confinement fusion: a defence context

Measurement and simulation of the temperature evolution of a short pulse laser heated buried layer target

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