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Title: Visualization of expanding warm dense gold and diamond heated rapidly by laser-generated ion beams

Journal Article · · Scientific Reports
DOI:https://doi.org/10.1038/srep14318· OSTI ID:1221784

With the development of several novel heating sources, scientists can now heat a small sample isochorically above 10,000 K. Although matter at such an extreme state, known as warm dense matter, is commonly found in astrophysics (e.g., in planetary cores) as well as in high energy density physics experiments, its properties are not well understood and are difficult to predict theoretically. This is because the approximations made to describe condensed matter or high-temperature plasmas are invalid in this intermediate regime. A sufficiently large warm dense matter sample that is uniformly heated would be ideal for these studies, but has been unavailable to date. We have used a beam of quasi-monoenergetic aluminum ions to heat gold and diamond foils uniformly and isochorically. For the first time, we visualized directly the expanding warm dense gold and diamond with an optical streak camera. Furthermore, we present a new technique to determine the initial temperature of these heated samples from the measured expansion speeds of gold and diamond into vacuum. We anticipate the uniformly heated solid density target will allow for direct quantitative measurements of equation-of-state, conductivity, opacity, and stopping power of warm dense matter, benefiting plasma physics, astrophysics, and nuclear physics.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC52-06NA25396
OSTI ID:
1221784
Report Number(s):
LA-UR-15-20385; srep14318; TRN: US1600664
Journal Information:
Scientific Reports, Vol. 5; ISSN 2045-2322
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 27 works
Citation information provided by
Web of Science

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Cited By (6)

Laser-ion acceleration using mixed compositions: Tailoring the target for each species journal December 2019
Interatomic Potential in the Nonequilibrium Warm Dense Matter Regime journal August 2018
Laser-plasmas in the relativistic-transparency regime: Science and applications journal May 2017
Plasma kinetic effects on interfacial mix and burn rates in multispatial dimensions journal June 2019
A detailed examination of laser-ion acceleration mechanisms in the relativistic transparency regime using tracers journal April 2018
Linear dependence of surface expansion speed on initial plasma temperature in warm dense matter journal July 2016