Resolving Ultrafast Heating of Dense Cryogenic Hydrogen

Zastrau, U.; Sperling, P.; Harmand, M.; Becker, Andreas; Bornath, Th.; Bredow, R.; Dziarzhytski, Siarhei; Fennel, Thomas; Fletcher, L. B.; Förster, E.; Göde, S.; Gregori, G.; Hilbert, V.; Hochhaus, D. C.; Holst, Bastian; Laarmann, Tim; Lee, H. J.; Ma, T.; Mithen, J.; Mitzner, R.; Murphy, C. D.; Nakatsutsumi, M.; Neumayer, P.; Przystawik, Andreas; Roling, Sebastian; Schulz, Michael; Siemer, B.; Skruszewicz, Slawomir; Tiggesbäumker, J.; Toleikis, S.; Tschentscher, Thomas; White, Thomas G.; Wöstmann, Michael; Zacharias, H.; Döppner, T.; Glenzer, S. H.; Redmer, R.

doi:10.1103/physrevlett.112.105002

Cited by 114 publications

(99 citation statements)

References 39 publications

(45 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For instance, one could take into account possible nonequilibrium effects. Therefore, motivated by this discrepancy we performed additional DFT-MD simulations with different electron and ion temperatures [9,37,38], in order to study the effects of a nonequilibrium, two-temperature state that might have been created in these laser-driven experiments; [1] and a reanalyzed spectrum (green) given in Ref. [14].…”

Section: B Nonequilibrium Effectsmentioning

confidence: 99%

“…Pump-probe experiments with variable time delay provide insight into the excitation and relaxation dynamics in dense plasmas on ultrashort time scales [4,9]. Therefore, XRTS is considered a key diagnostics tool in, e.g., compression experiments in order to obtain adequate results for the equation of state and further quantities such as the transport coefficients of warm dense matter (WDM).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Ab initiocalculation of the ion feature in x-ray Thomson scattering

et al. 2015

View full text Add to dashboard Cite

The spectrum of x-ray Thomson scattering is proportional to the dynamic structure factor. An important contribution is the ion feature which describes elastic scattering of x rays off electrons. We apply an ab initio method for the calculation of the form factor of bound electrons, the slope of the screening cloud of free electrons, and the ion-ion structure factor in warm dense beryllium. With the presented method we can calculate the ion feature from first principles. These results will facilitate a better understanding of x-ray scattering in warm dense matter and an accurate measurement of ion temperatures which would allow determining nonequilibrium conditions, e.g., along shock propagation.

show abstract

Section: B Nonequilibrium Effectsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Ab initiocalculation of the ion feature in x-ray Thomson scattering

et al. 2015

View full text Add to dashboard Cite

show abstract

“…Frequency-resolved data can probe the energy distribution of electronic states (see, e.g., Refs. [12][13][14][15][16]) while x-ray diffraction measurements mostly reveal the ionic structure [17][18][19][20][21][22]. The range of materials and conditions that can be investigated nowadays allows for a thorough test of theoretical models [23][24][25][26][27] for the electron structure in warm dense matter.…”

Section: Introductionmentioning

confidence: 99%

Ab initioapproach to model x-ray diffraction in warm dense matter

Vorberger

Gericke

2015

Phys. Rev. E

View full text Add to dashboard Cite

It is demonstrated how the static electron-electron structure factor in warm dense matter can be obtained from density functional theory in combination with quantum Monte Carlo data. In contrast to theories assuming well-separated bound and free states, this ab initio approach yields also valid results for systems close to the Mott transition (pressure ionization), where bound states are strongly modified and merge with the continuum. The approach is applied to x-ray Thomson scattering and compared to predictions of the Chihara formula whereby we use the ion-ion and electron-ion structure from the same simulations. The results show significant deviations of the screening cloud from the often applied Debye-like form.

show abstract

“…For example, intense shortwavelength radiation from extended-ultraviolet free-electron lasers can isochorically heat particles, whereby self-Thomson scattering can be exploited to characterize the resulting warm dense matter (WDM) state [28]. EUV-pump--EUV-probe studies were successful in mapping the solid-to-plasma transition in real time [29]. Combining time-resolved soft x-ray diagnostics with microplasma generation by intense NIR laser pulses remains a challenge due to the initially incomplete spatial heating.…”

Section: Introductionmentioning

confidence: 99%

The interaction of intense femtosecond laser pulses with argon microdroplets studied near the soft x-ray emission threshold

Irsig¹,

Shihab²,

Kazak³

et al. 2017

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

View full text Add to dashboard Cite

Abstract. The extreme ultraviolet plasma emission from liquid microsized argon droplets exposed to intense near-infrared laser pulses has been investigated. Emission from the warm dense matter targets is recorded in a spectral range in between 16 and 30 nm at laser intensities of 10 14 W/ cm 2 . Above the emission threshold, soft x-ray radiation exponentially increases with the pulse energy whereby a strong dependence of the yields on the pulse duration is observed, which points at an effective electron collisional heating of the microplasma by inverse bremsstrahlung.Accompanying hydrodynamic simulations reveal the temporal and spatial development of the microplasma conditions. The good agreement in between the measured and calculated emission spectra as well as the extracted electron temperatures confirm that hydrodynamic simulations can be applied in the analysis of strongly excited droplets.

show abstract

Resolving Ultrafast Heating of Dense Cryogenic Hydrogen

Cited by 114 publications

References 39 publications

Ab initiocalculation of the ion feature in x-ray Thomson scattering

Ab initiocalculation of the ion feature in x-ray Thomson scattering

Ab initioapproach to model x-ray diffraction in warm dense matter

The interaction of intense femtosecond laser pulses with argon microdroplets studied near the soft x-ray emission threshold

Contact Info

Product

Resources

About