Frontiers in Physics (Mar 2022)
Electron-Ion Temperature Relaxation in Warm Dense Hydrogen Observed With Picosecond Resolved X-Ray Scattering
- L. B. Fletcher,
- J. Vorberger,
- W. Schumaker,
- C. Ruyer,
- S. Goede,
- S. Goede,
- E. Galtier,
- U. Zastrau,
- E. P. Alves,
- S. D. Baalrud,
- R. A. Baggott,
- R. A. Baggott,
- B. Barbrel,
- Z. Chen,
- Z. Chen,
- T. Döppner,
- M. Gauthier,
- E. Granados,
- J. B. Kim,
- D. Kraus,
- D. Kraus,
- H. J. Lee,
- M. J. MacDonald,
- M. J. MacDonald,
- R. Mishra,
- A. Pelka,
- A. Ravasio,
- C. Roedel,
- A. R. Fry,
- R. Redmer,
- F. Fiuza,
- D. O. Gericke,
- S. H. Glenzer
Affiliations
- L. B. Fletcher
- SLAC National Accelerator Laboratory, Stanford University, Menlo Park, CA, United States
- J. Vorberger
- Helmholtz-Zentrum Dresden-Rossendorf, High Energy Density Physics, Dresden, Germany
- W. Schumaker
- SLAC National Accelerator Laboratory, Stanford University, Menlo Park, CA, United States
- C. Ruyer
- SLAC National Accelerator Laboratory, Stanford University, Menlo Park, CA, United States
- S. Goede
- SLAC National Accelerator Laboratory, Stanford University, Menlo Park, CA, United States
- S. Goede
- European XFEL, Schenefeld, Germany
- E. Galtier
- SLAC National Accelerator Laboratory, Stanford University, Menlo Park, CA, United States
- U. Zastrau
- European XFEL, Schenefeld, Germany
- E. P. Alves
- SLAC National Accelerator Laboratory, Stanford University, Menlo Park, CA, United States
- S. D. Baalrud
- Department of Physics and Astronomy, University of Iowa, Iowa City, IA, United States
- R. A. Baggott
- Centre for Fusion, Space and Astrophysics, Department of Physics, University of Warwick, Coventry, United Kingdom
- R. A. Baggott
- Blackett Laboratory, Imperial College London, London, United Kingdom
- B. Barbrel
- Department of Physics, University of California, Berkeley, Berkeley, CA, United States
- Z. Chen
- SLAC National Accelerator Laboratory, Stanford University, Menlo Park, CA, United States
- Z. Chen
- University of Alberta, Edmonton, AB, Canada
- T. Döppner
- Lawrence Livermore National Laboratory, Livermore, CA, United States
- M. Gauthier
- SLAC National Accelerator Laboratory, Stanford University, Menlo Park, CA, United States
- E. Granados
- SLAC National Accelerator Laboratory, Stanford University, Menlo Park, CA, United States
- J. B. Kim
- SLAC National Accelerator Laboratory, Stanford University, Menlo Park, CA, United States
- D. Kraus
- Department of Physics, University of California, Berkeley, Berkeley, CA, United States
- D. Kraus
- Helmholtz-Zentrum Dresden-Rossendorf, High Energy Density Physics, Dresden, Germany
- H. J. Lee
- SLAC National Accelerator Laboratory, Stanford University, Menlo Park, CA, United States
- M. J. MacDonald
- SLAC National Accelerator Laboratory, Stanford University, Menlo Park, CA, United States
- M. J. MacDonald
- 0University of Michigan, Ann Arbor, MI, United States
- R. Mishra
- SLAC National Accelerator Laboratory, Stanford University, Menlo Park, CA, United States
- A. Pelka
- Helmholtz-Zentrum Dresden-Rossendorf, High Energy Density Physics, Dresden, Germany
- A. Ravasio
- 1Laboratoire pour L’Utilisation des Lasers Intenses, Palaiseau, France
- C. Roedel
- SLAC National Accelerator Laboratory, Stanford University, Menlo Park, CA, United States
- A. R. Fry
- SLAC National Accelerator Laboratory, Stanford University, Menlo Park, CA, United States
- R. Redmer
- 2Universität Rostock, Institut für Physik, Rostock, Germany
- F. Fiuza
- SLAC National Accelerator Laboratory, Stanford University, Menlo Park, CA, United States
- D. O. Gericke
- Centre for Fusion, Space and Astrophysics, Department of Physics, University of Warwick, Coventry, United Kingdom
- S. H. Glenzer
- SLAC National Accelerator Laboratory, Stanford University, Menlo Park, CA, United States
- DOI
- https://doi.org/10.3389/fphy.2022.838524
- Journal volume & issue
-
Vol. 10
Abstract
Angularly resolved X-ray scattering measurements from fs-laser heated hydrogen have been used to determine the equilibration of electron and ion temperatures in the warm dense matter regime. The relaxation of rapidly heated cryogenic hydrogen is visualized using 5.5 keV X-ray pulses from the Linac Coherent Light (LCLS) source in a 1 Hz repetition rate pump-probe setting. We demonstrate that the electron-ion energy transfer is faster than quasi-classical Landau-Spitzer models that use ad hoc cutoffs in the Coulomb logarithm.
Keywords
- non-equilibrium plasma
- electron-ion equilibration
- warm dense hydrogen
- x-ray thomson scattering
- ultrafast x-ray scattering
