K-line emission profiles with focus on the self-consistent calculation of plasma polarization

Sengebusch, A.; Reinholz, H.; Röpke, G.; Zastrau, U.; Kämpfer, T.; Uschmann, I.; Förster, E.; Stambulchik, E.; Kroupp, E.; Maron, Y.

doi:10.1088/1751-8113/42/21/214061

Cited by 7 publications

(11 citation statements)

References 11 publications

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“…Their width was measured as ≈3.1 eV, which is broader than the reported natural Ti-K α linewidth of about 1.45 eV and 2.13 eV 67 , respectively. This broadening has been observed before 68,69 and attributed to emission contributions from atoms in higher ionization states.…”

Section: A Spectral Characterizationsupporting

confidence: 62%

Time-resolved diffraction with an optimized short pulse laser plasma X-ray source

Afshari

Krumey

Menn

et al. 2020

Structural Dynamics

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We present a set-up for time-resolved X-ray diffraction based on a short pulse, laser-driven plasma X-ray source. The employed modular design provides high flexibility to adapt the set-up to the specific requirements (e.g. X-ray optics, sample environment) of particular applications. The configuration discussed here has been optimized towards high angular/momentum resolution and uses K α -radiation (4.51 keV) from a Ti wire-target in combination with a toroidally bent crystal for collection, monochromatization and focusing of the emitted radiation. 2 × 10 5 Ti-K α1 photons per pulse with 10 −4 relative bandwidth are delivered to the sample at 10 Hz repetition rate. This allows for high dynamic range (10 4 ) measurements of transient changes of the rocking curves of materials as for example induced by laser-triggered strain waves. PACS numbers: 78.47.J-, 61.05.C, 63.30.dd a) Klaus.Sokolowski-Tinten@uni-due.de

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Section: A Spectral Characterizationsupporting

confidence: 62%

Time-resolved diffraction with an optimized short pulse laser plasma X-ray source

Afshari

Krumey

Menn

et al. 2020

Structural Dynamics

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“…The corresponding states with a vacancy in either K or L shell (e.g., 1s2s 2 2p 6 3s 2 3p 5 4s and 1s 2 2s 2 2p 5 3s 2 3p 5 4s) were excluded from the calculations as well. It should be noted that the energies of some of the 4s-excited states are only slightly higher than the ionization threshold, therefore a more scrupulous approach would be to treat such states within the effective-statistical-weights model [16,17], which is similar in spirit to using the Planck-Larkin renormalization of the partition function, as is done in [9]. However, the contribution of the 4s states to the lineshapes turned out to be very small.…”

Section: Resultsmentioning

confidence: 99%

Progress in line-shape modeling of K-shell transitions in warm dense titanium plasmas

Stambulchik¹,

Bernshtam²,

Weingarten³

et al. 2009

J. Phys. A: Math. Theor.

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Modeling of x-ray spectra emitted from a solid-density strongly coupled plasma formed in short-duration, high-power laser-matter interactions represents a highly challenging task due to extreme conditions found in these experiments. In this paper we present recent progress in the modeling and analysis of Kα emission from solid-density laser-produced titanium plasmas. The selfconsistent modeling is based on collisional-radiative calculations that comprise many different processes and effects, such as satellite formation and blending, plasma polarization, Stark broadening, solid-density quantum effects and self-absorption. A rather strong dependence of the Kα shape on the bulk electron temperature is observed. Preliminary analysis of recently obtained experimental data shows a great utility of the calculations, allowing for inferring a temperature distribution of the bulk electrons from a single-shot measurement.

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“…3d or 4s. It was shown, that excited states give an important contribution to emitted X-ray spectra [13]. In order to obtain proper temperature estimates, theses contributions must not be neglected.…”

Section: Resultsmentioning

confidence: 99%

“…Due to its metallic character at solid density, the initial state is considered to be fourfold ionized, i.e. an ion with Ar-like outer shell immersed in a dense gas of free electrons [13]. Thus, we assume a starting ionization of m 0 = 4 within the set of Saha equations (4).…”

Section: Resultsmentioning

confidence: 99%

Composition of Partially Ionized Systems Using the PlanckLarkin Partition Function of Mid‐Z ions

Sengebusch¹,

Reinholz

Röpke

2009

Contrib. Plasma Phys.

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We report on the composition of warm, dense plasmas of M-shell ions. Assuming local thermal equilibrium, the abundance of different ionization stages is given by a set of coupled Saha-equations. In order to avoid discontinuities at the Mott density, the partition functions have to account for pressure ionization due to continuum lowering consistently. The Planck-Larkin renormalization of bound and scattering states is well elaborated for hydrogenic systems. This paper shows the consistent extension to moderately ionized Mid-Z elements. We present results for solid-density polymere and titanium plasmas.

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K-line emission profiles with focus on the self-consistent calculation of plasma polarization

Cited by 7 publications

References 11 publications

Time-resolved diffraction with an optimized short pulse laser plasma X-ray source

Time-resolved diffraction with an optimized short pulse laser plasma X-ray source

Progress in line-shape modeling of K-shell transitions in warm dense titanium plasmas

Composition of Partially Ionized Systems Using the PlanckLarkin Partition Function of Mid‐Z ions

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