Reply to: Reconsidering X-ray plasmons

Fletcher, L. B.; Lee, H. J.; Döppner, T.; Galtier, E.; Nagler, Bob; Heimann, Philip; Fortmann, C.; LePape, S.; Ma, T.; Millot, Marius; Pak, A.; Turnbull, D.; Chapman, D. A.; Gericke, D. O.; Vorberger, Jan; White, T. G.; Gregori, G.; Wei, M. S.; Barbrel, B.; Falcone, R. W.; Kao, C.‐C.; Nuhn, Heinz-Dieter; Welch, J.; Zastrau, U.; Neumayer, P.; Hastings, J. B.; Glenzer, S. H.

doi:10.1038/s41566-019-0533-0

Cited by 15 publications

(18 citation statements)

References 10 publications

(15 reference statements)

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“…In the liquid regime, angle‐resolved elastic X‐ray scattering gives access to the static ion–ion structure factor. The location of the first correlation peak of the liquid structure factor is inversely proportional to the average ion–ion distance, and thus provides a direct measurement of the mass density. Provided the sample is sufficiently thin, X‐ray‐transmission‐based diagnostic methods also become applicable .…”

Section: Discussion Of Diagnosticsmentioning

confidence: 99%

Equation‐of‐state studies of high‐energy‐density matter using intense ion beams at the Facility for Antiprotons and Ion Research

Tahir

Neumayer

Shutov

et al. 2019

Contributions to Plasma Physics

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This paper describes an experiment design based on numerical simulations to measure the equation‐of‐state properties of high‐energy‐density (HED) matter using intense particle beams. The simulations are performed using a 2D hydrodynamic computer code, BIG2, while the beam parameters are considered to match the Facility for Antiprotons and Ion Research beam. This study has shown that in such experiments one can generate different phases of HED lead. Similar calculations are planned for other materials.

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Section: Discussion Of Diagnosticsmentioning

confidence: 99%

Equation‐of‐state studies of high‐energy‐density matter using intense ion beams at the Facility for Antiprotons and Ion Research

Tahir

Neumayer

Shutov

et al. 2019

Contributions to Plasma Physics

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“…More recent work in XRTS focuses on the information found in the elastic scattering feature; various authors use the strength of the elastic scattering feature to deduce plasma properties, such as the ion structure factor [32], the ionization state [4,5,30,36,49,50], or the screening properties [34]. The values of f (k), q(k), and S ii (k, ω) all depend on the magnitude of the scattering vector, k, which depends on the frequency of incident radiation, ω i , and the scattering angle, θ.…”

Section: Xrts Theory and Previous Workmentioning

confidence: 99%

“…The ionic form factor, f (k), is calculated by the Fourier transform of bound electrons around an ion species. The contribution from the electron screening cloud, q(k), arises from the response of the free electrons to the ions, and is found to be best modeled by a finite wavelength screening method [5,34]. The S ii (k) can be modeled with several different potentials, including Debye-Hückel [42], Coulomb, and finite wavelength.…”

Section: Xrts Theory and Previous Workmentioning

confidence: 99%

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Characterizing plasma conditions in radiatively heated solid-density samples with x-ray Thomson scattering

et al. 2018

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We have developed an experimental platform to generate radiatively heated solid density samples for warm dense matter studies at the OMEGA laser facility. Cylindrical samples of boron and beryllium are isochorically-heated by K-and L-shell emission from x-ray converter foils wrapped around the cylinders' radii. X-ray Thomson scattering (XRTS) measures the temperature and the ionization state of the samples as function of time. Temperatures approach 10 eV, and the ionization states are found to be ZB = 3 and ZBe = 2. Radiation hydrodynamics simulations were performed to confirm a homogeneous plasma state exists in the center of the sample for the duration of the experiment. Results from the study can be extended to improve understanding of radiative heating processes in the warm dense matter regime.

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“…4 of Ref. [10] cannot be described by the assumption of a liquid-like structure, see Fig. 1(b) in [1].…”

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confidence: 99%

Comment on “Isochoric, isobaric, and ultrafast conductivities of aluminum, lithium, and carbon in the warm dense matter regime”

et al. 2019

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Dharma-wardana et al. [M. W. C. Dharma-wardana et al., Phys. Rev. E 96, 053206 (2017)] recently calculated dynamic electrical conductivities for warm dense matter as well as for nonequilibrium two-temperature states termed "ultrafast matter" (UFM) [M. W. C. Dharma-wardana, Phys. Rev. E 93, 063205 (2016)]. In this comment we present two evident reasons, why these UFM calculations are neither suited to calculate dynamic conductivities nor x-ray Thomson scattering spectra in isochorically heated warm dense aluminum. First, the ion-ion structure factor, a major input into the conductivity and scattering spectra calculations, deviates strongly from that of isochorically heated aluminum. Second, the dynamic conductivity does not show a non-Drude behavior which is an essential prerequisite for a correct description of the absorption behavior in aluminum. Additionally, we clarify misinterpretations by Dharma-wardana et al. concerning the conductivity measurements of Gathers [

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Reply to: Reconsidering X-ray plasmons

Cited by 15 publications

References 10 publications

Equation‐of‐state studies of high‐energy‐density matter using intense ion beams at the Facility for Antiprotons and Ion Research

Equation‐of‐state studies of high‐energy‐density matter using intense ion beams at the Facility for Antiprotons and Ion Research

Characterizing plasma conditions in radiatively heated solid-density samples with x-ray Thomson scattering

Comment on “Isochoric, isobaric, and ultrafast conductivities of aluminum, lithium, and carbon in the warm dense matter regime”

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