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Title: Observation of Ultrafast Nonequilibrium Collective Dynamics in Warm Dense Hydrogen

Abstract

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.

Authors:
; ; ; ; ;  [1]; ; ; ; ; ; ; ; ; ;  [2]; ;  [3]; ;  [4]
  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)
Publication Date:
OSTI Identifier:
21386872
Resource Type:
Journal Article
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 104; Journal Issue: 12; Other Information: DOI: 10.1103/PhysRevLett.104.125002; (c) 2010 The American Physical Society; Journal ID: ISSN 0031-9007
Country of Publication:
United States
Language:
English
Subject:
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

Citation Formats

Faeustlin, R R, Duesterer, S, Laarmann, T, Redlin, H, Tavella, F, Toleikis, S, Bornath, Th, Goede, S, Irsig, R, Meiwes-Broer, K -H, Przystawik, A, Redmer, R, Reinholz, H, Roepke, G, Thiele, R, Tiggesbaeumker, J, Doeppner, T, Glenzer, S H, Foerster, E, and Uschmann, I. Observation of Ultrafast Nonequilibrium Collective Dynamics in Warm Dense Hydrogen. United States: N. p., 2010. Web. doi:10.1103/PHYSREVLETT.104.125002.
Faeustlin, R R, Duesterer, S, Laarmann, T, Redlin, H, Tavella, F, Toleikis, S, Bornath, Th, Goede, S, Irsig, R, Meiwes-Broer, K -H, Przystawik, A, Redmer, R, Reinholz, H, Roepke, G, Thiele, R, Tiggesbaeumker, J, Doeppner, T, Glenzer, S H, Foerster, E, & Uschmann, I. Observation of Ultrafast Nonequilibrium Collective Dynamics in Warm Dense Hydrogen. United States. https://doi.org/10.1103/PHYSREVLETT.104.125002
Faeustlin, R R, Duesterer, S, Laarmann, T, Redlin, H, Tavella, F, Toleikis, S, Bornath, Th, Goede, S, Irsig, R, Meiwes-Broer, K -H, Przystawik, A, Redmer, R, Reinholz, H, Roepke, G, Thiele, R, Tiggesbaeumker, J, Doeppner, T, Glenzer, S H, Foerster, E, and Uschmann, I. 2010. "Observation of Ultrafast Nonequilibrium Collective Dynamics in Warm Dense Hydrogen". United States. https://doi.org/10.1103/PHYSREVLETT.104.125002.
@article{osti_21386872,
title = {Observation of Ultrafast Nonequilibrium Collective Dynamics in Warm Dense Hydrogen},
author = {Faeustlin, R R and Duesterer, S and Laarmann, T and Redlin, H and Tavella, F and Toleikis, S and Bornath, Th and Goede, S and Irsig, R and Meiwes-Broer, K -H and Przystawik, A and Redmer, R and Reinholz, H and Roepke, G and Thiele, R and Tiggesbaeumker, J and Doeppner, T and Glenzer, S H and Foerster, E and Uschmann, I},
abstractNote = {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.},
doi = {10.1103/PHYSREVLETT.104.125002},
url = {https://www.osti.gov/biblio/21386872}, journal = {Physical Review Letters},
issn = {0031-9007},
number = 12,
volume = 104,
place = {United States},
year = {Fri Mar 26 00:00:00 EDT 2010},
month = {Fri Mar 26 00:00:00 EDT 2010}
}