S
Sebastien Hamel
Researcher at Lawrence Livermore National Laboratory
Publications - 96
Citations - 3171
Sebastien Hamel is an academic researcher from Lawrence Livermore National Laboratory. The author has contributed to research in topics: Equation of state & Density functional theory. The author has an hindex of 28, co-authored 89 publications receiving 2498 citations. Previous affiliations of Sebastien Hamel include Université de Montréal.
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Nanosecond X-ray diffraction of shock-compressed superionic water ice.
Marius Millot,Federica Coppari,J. Ryan Rygg,J. Ryan Rygg,Antonio Correa Barrios,Sebastien Hamel,Damian Swift,Jon Eggert +7 more
TL;DR: The atomic structure of H2O is documented at several million atmospheres of pressure and temperatures of several thousand degrees, revealing shockwave-induced ultrafast crystallization and a novel water ice phase, ice XVIII, with exotic superionic properties.
Journal ArticleDOI
Experimental evidence for superionic water ice using shock compression
Marius Millot,Marius Millot,Sebastien Hamel,J. Ryan Rygg,J. Ryan Rygg,Peter M. Celliers,Gilbert Collins,Gilbert Collins,Federica Coppari,Dayne Fratanduono,Raymond Jeanloz,Damian Swift,Jon Eggert +12 more
TL;DR: In this paper, the authors used time-resolved optical pyrometry and laser velocimetry measurements as well as supporting density functional theory-molecular dynamics (DFT-MD) simulations to verify a 30-year-old prediction of superionic conduction in water ice at planetary interior conditions.
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Mass-Radius Relationships for Exoplanets
Damian Swift,Jon Eggert,Damien Hicks,Sebastien Hamel,Kyle Caspersen,Eric Schwegler,Gilbert Collins,Nadine Nettelmann,Graeme J. Ackland +8 more
TL;DR: In this article, a method for deriving and testing equations of state, and deduce mass-radius and mass-pressure relations for key, relevant materials whose equation of state (EOS) is reasonably well established, and for differentiated Fe/rock.
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Light emission from silicon-rich nitride nanostructures
TL;DR: In this article, the optical properties of light-emitting Si-rich silicon nitride (SRN) films were studied by micro-Raman and photoluminescence spectroscopy and indicate the presence of small Si clusters characterized by broad near-infrared emission, large absorption/emission Stokes shift, and nanosecond recombination.
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Solid Iron Compressed Up to 560 GPa
Yuan Ping,Federica Coppari,Damien Hicks,B. Yaakobi,Dayne Fratanduono,Sebastien Hamel,Jon Eggert,J. R. Rygg,Raymond F. Smith,Damian Swift,Dave Braun,T. R. Boehly,Gilbert Collins +12 more
TL;DR: Extended x-ray absorption fine structure (EXAFS) spectroscopy offers simultaneous density, temperature, and local-structure measurements for the compressed iron, and the results provide the first constraint on the melting line of iron above 400 GPa.