Observation of Ultrafast Nonequilibrium Collective Dynamics in Warm Dense Hydrogen
Journal Article
·
· Physical Review Letters
- DESY, Notkestr. 85, 22607 Hamburg (Germany)
- Institut fuer Physik, Universitaet Rostock, 18051 Rostock (Germany)
- L-399, LLNL, University of California, P.O. Box 808, Livermore, California 94551 (United States)
- IOQ, Friedrich-Schiller-Universitaet, Max-Wien Platz 1, 07743 Jena (Germany)
We investigate ultrafast (fs) electron dynamics in a liquid hydrogen sample, isochorically and volumetrically heated to a moderately coupled plasma state. Thomson scattering measurements using 91.8 eV photons from the free-electron laser in Hamburg (FLASH at DESY) show that the hydrogen plasma has been driven to a nonthermal state with an electron temperature of 13 eV and an ion temperature below 0.1 eV, while the free-electron density is 2.8x10{sup 20} cm{sup -3}. For dense plasmas, our experimental data strongly support a nonequilibrium kinetics model that uses impact ionization cross sections based on classical free-electron collisions.
- OSTI ID:
- 21386872
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 12 Vol. 104; ISSN 0031-9007; ISSN PRLTAO
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACCELERATORS
BOSONS
COLLISIONS
CROSS SECTIONS
CYCLIC ACCELERATORS
DATA
DESY
ELECTRON COLLISIONS
ELECTRON DENSITY
ELECTRON TEMPERATURE
ELECTRONS
ELEMENTARY PARTICLES
ELEMENTS
ENERGY RANGE
EV RANGE
EXPERIMENTAL DATA
FERMIONS
FLUIDS
FREE ELECTRON LASERS
HYDROGEN
INELASTIC SCATTERING
INFORMATION
ION TEMPERATURE
IONIZATION
LASERS
LEPTONS
LIQUIDS
MASSLESS PARTICLES
NON-EQUILIBRIUM PLASMA
NONMETALS
NUMERICAL DATA
PHOTONS
PLASMA
SCATTERING
SYNCHROTRONS
THOMSON SCATTERING
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACCELERATORS
BOSONS
COLLISIONS
CROSS SECTIONS
CYCLIC ACCELERATORS
DATA
DESY
ELECTRON COLLISIONS
ELECTRON DENSITY
ELECTRON TEMPERATURE
ELECTRONS
ELEMENTARY PARTICLES
ELEMENTS
ENERGY RANGE
EV RANGE
EXPERIMENTAL DATA
FERMIONS
FLUIDS
FREE ELECTRON LASERS
HYDROGEN
INELASTIC SCATTERING
INFORMATION
ION TEMPERATURE
IONIZATION
LASERS
LEPTONS
LIQUIDS
MASSLESS PARTICLES
NON-EQUILIBRIUM PLASMA
NONMETALS
NUMERICAL DATA
PHOTONS
PLASMA
SCATTERING
SYNCHROTRONS
THOMSON SCATTERING