Investigation of the temperature in dense carbon near the solid-liquid phase transition between 100 GPa and 200 GPa with spectrally resolved X-ray scattering

Helfrich, John P.; Vorberger, Jan; Frydrych, S.; Schaumann, G.; Ravasio, A.; Gauthier, M.; Fletcher, L. B.; Nagler, Bob; Barbrel, B.; Bachmann, B.; Gamboa, E. J.; Göde, S.; Lee, H.J.; Neumayer, P.; Schumaker, W.; Döppner, T.; Falcone, R. W.; Glenzer, S. H.; Roth, Markus; Kraus, D.

doi:10.1016/j.hedp.2019.05.001

Cited by 5 publications

(3 citation statements)

References 47 publications

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“…In particular, the high pressure properties of carbon have attracted a lot of investigations in form of experiments using laser shocks [9][10][11][12][13][14], shocks generated using z-pinchs [15], or explosives [16,17]. These have been combined with VISAR or SOP diagnostics, and, especially in recent years, with x-ray scattering techniques [18][19][20][21][22][23][24][25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

“…Particular attention has been given to the determination of the melt line of carbon from ambient pressure to several megabars [11,12,14,28,29,37,41,42,44,46,63,65,70]. Quantitative details differ from theory to theory but it is clear that graphite as well as diamond and several other high pressure phases of carbon exhibit a melting line maximum.…”

Section: Introductionmentioning

confidence: 99%

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The structure in warm dense carbon

Vorberger

Plageman

Redmer

2020

High Energy Density Physics

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The structure of the fluid carbon phase in the pressure region of the graphite, diamond, and BC8 solid phase is investigated. We find increasing coordination numbers with an increase in density. From zero to 30 GPa, the liquid shows a decrease of packing efficiency with increasing temperature. However, for higher pressures, the coordination number increases with increasing temperature. Up to 1.5 eV and independent of the pressure up to 1500 GPa, a double-peak structure in the ion structure factors exists, indicating persisting covalent bonds. Over the whole pressure range from zero to 3000 GPa, the fluid structure and properties are strongly determined by such covalent bonds.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The structure in warm dense carbon

Vorberger

Plageman

Redmer

2020

High Energy Density Physics

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“…This was the seventh annual workshop in a series centered around the science and developments of the Matter in Extreme Conditions instrument (MEC) at LCLS and touching also on similar facilities being developed worldwide, as well as related science at SLAC [1][2][3][4][5][6]. In the year since the last workshop, 11 journal articles [7][8][9][10][11][12][13][14][15][16][17], and one comment [18] have been published on research at LCLS-MEC. This year's workshop was co-organized by Los Alamos National Laboratory and SLAC National Accelerator Laboratory.…”

Section: Introductionmentioning

confidence: 99%

Seventh User Workshop on High-Power Lasers at the Linac Coherent Light Source

2020

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We report on a seventh annual workshop in a series focused on science realized by the combination of hard X-ray free electron lasers with high power optical lasers, hosted at the SLAC National Accelerator Laboratory in Menlo Park, CA. Members from the user community of the Matter in Extreme Conditions (MEC) endstation of the Linac Coherent Light Source (LCLS) and other scientists met with local scientists to discuss developments at LCLS and MEC and related facilities, including experimental results and future plans.

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