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Laser Shock Compression

All articles tagged with #laser shock compression

energy14 days ago•15 min saved

LLNL Laser Shocks Reveal Diamond Melts at 12,680°F and Floats on Its Own Melt

Lawrence Livermore National Laboratory (LLNL) researchers resolved a 20-year dispute over diamond's melting point by using the OMEGA laser to shock-compress tiny diamond samples. The team measured a melting temperature of 12,680°F (7,300 K) at 145 million psi, aligning experimental data with quantum simulations. A key finding is that solid diamond floats on its own liquid, similar to ice on water, indicating the liquid phase is denser. This data improves models for ice-giant interiors and suggests gentler initial shocks could enhance fusion energy gain at the National Ignition Facility (NIF).

via Autonocion.com|

#diamond-melting-point #energy #extreme-pressure-physics

science26 days ago•142 min saved

Laser shocks revise diamond melting point, solving a decades-long discrepancy

Researchers used ultraviolet laser shock compression on tiny synthetic diamond plates, measuring changes in reflectivity and glow to map the diamond’s melting temperature with unprecedented precision. They found the melting point is more than 1,300°F (about 700°C) lower than previously thought, bringing it in line with theoretical predictions and resolving a long-standing gap between data and models. The findings have implications for nuclear fusion experiments that rely on diamond capsules and for understanding the interiors of ice giant planets like Uranus and Neptune, where diamond-like carbon behavior under extreme pressures may occur.

via Live Science|

#diamond #laser-shock-compression #melting-point