Observation of Ultrafast Nonequilibrium Collective Dynamics in Warm Dense Hydrogen

Journal Article · Fri Mar 26 00:00:00 EDT 2010 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.104.125002· OSTI ID:21386872

Faeustlin, R R; Duesterer, S; Laarmann, T; Redlin, H; Tavella, F; Toleikis, S ^[1]; Bornath, Th; Goede, S; Irsig, R; Meiwes-Broer, K -H; Przystawik, A; Redmer, R; Reinholz, H; Roepke, G; Thiele, R; Tiggesbaeumker, J ^[2]; Doeppner, T; Glenzer, S H ^[3]; Foerster, E; Uschmann, I ^[4]

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1. DESY, Notkestr. 85, 22607 Hamburg (Germany)
2. Institut fuer Physik, Universitaet Rostock, 18051 Rostock (Germany)
3. L-399, LLNL, University of California, P.O. Box 808, Livermore, California 94551 (United States)
4. 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, Vol. 104, Issue 12; Other Information: DOI: 10.1103/PhysRevLett.104.125002; (c) 2010 The American Physical Society; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
CROSS SECTIONS
DESY
ELECTRON COLLISIONS
ELECTRON DENSITY
ELECTRON TEMPERATURE
ELECTRONS
EV RANGE
EXPERIMENTAL DATA
FREE ELECTRON LASERS
HYDROGEN
ION TEMPERATURE
IONIZATION
LIQUIDS
NON-EQUILIBRIUM PLASMA
PHOTONS
THOMSON SCATTERING
ACCELERATORS
BOSONS
COLLISIONS
CYCLIC ACCELERATORS
DATA
ELEMENTARY PARTICLES
ELEMENTS
ENERGY RANGE
FERMIONS
FLUIDS
INELASTIC SCATTERING
INFORMATION
LASERS
LEPTONS
MASSLESS PARTICLES
NONMETALS
NUMERICAL DATA
PLASMA
SCATTERING
SYNCHROTRONS