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Title: Tracking the ultrafast XUV optical properties of x-ray free-electron-laser heated matter with high-order harmonics

Abstract

We present measurements of photon absorption by free electrons as a solid is transformed to plasma. A femtosecond x-ray free-electron laser is used to heat a solid, which separates the electron and ion heating time scales. The changes in absorption are measured with an independent probe pulse created through high-order-harmonic generation. We find an increase in electron temperature to have a relatively small impact on absorption, contrary to several predictions, whereas ion heating increases absorption. Here, we compare the data to current theoretical and numerical approaches and find that a smoother electronic structure yields a better fit to the data, suggestive of a temperature-dependent electronic structure in warm dense matter.

Authors:
 [1];  [1];  [2];  [3];  [3];  [3];  [4];  [5];  [6];  [6];  [6];  [6];  [6];  [7];  [8];  [9];  [9];  [10];  [10];  [10] more »;  [11];  [11];  [12];  [3];  [2];  [1] « less
  1. Univ. of Lisbon (Portugal). GoLP/Instituto de Plasmas e Fusao Nuclear-Laboratorio Associado, Instituto Superior Tecnico
  2. Ecole Polytechnique, Palaiseau (France). Laboratoire d'Optique Appliquee
  3. Univ. Paris-Saclay, Gif-sur-Yvette (France)
  4. Friedrich Schiller Univ., Jena (Germany). Inst. of Optics and Quantum Electronics
  5. European X-ray Free-Electron Laser (XFEL), Hamburg (Germany)
  6. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  7. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  8. Imagine Optic, Orsay (France)
  9. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  10. Alternative Energies and Atomic Energy Commission (CEA), Arpajon (France). CEA Direction des Applications Militaires (DAM-DIF)
  11. Univ. Politecnica de Madrid, Madrid (Spain). Inst. de Fusion Nuclear
  12. Ecole Polytechnique, Palaiseau (France). Lab. pour l'Utilisation des Lasers Intenses (LULI)
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Fusion Energy Sciences (FES) (SC-24)
OSTI Identifier:
1423540
Grant/Contract Number:
AC02-76SF00515; SF00515; EXPL/FIS-OPT/0889/2012; PTDC/FIS/112392/2009; MP1203; EC-GA 654148; H2020-FETOPEN-2014-2015-RIA 665207
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review A
Additional Journal Information:
Journal Volume: 97; Journal Issue: 2; Journal ID: ISSN 2469-9926
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Williams, Gareth O., Künzel, S., Daboussi, S., Iwan, B., Gonzalez, A. I., Boutu, W., Hilbert, V., Zastrau, U., Lee, H. J., Nagler, B., Granados, E., Galtier, E., Heimann, P., Barbrel, B., Dovillaire, G., Lee, R. W., Dunn, J., Recoules, V., Blancard, C., Renaudin, P., de la Varga, A. G., Velarde, P., Audebert, P., Merdji, H., Zeitoun, Ph., and Fajardo, M. Tracking the ultrafast XUV optical properties of x-ray free-electron-laser heated matter with high-order harmonics. United States: N. p., 2018. Web. doi:10.1103/physreva.97.023414.
Williams, Gareth O., Künzel, S., Daboussi, S., Iwan, B., Gonzalez, A. I., Boutu, W., Hilbert, V., Zastrau, U., Lee, H. J., Nagler, B., Granados, E., Galtier, E., Heimann, P., Barbrel, B., Dovillaire, G., Lee, R. W., Dunn, J., Recoules, V., Blancard, C., Renaudin, P., de la Varga, A. G., Velarde, P., Audebert, P., Merdji, H., Zeitoun, Ph., & Fajardo, M. Tracking the ultrafast XUV optical properties of x-ray free-electron-laser heated matter with high-order harmonics. United States. doi:10.1103/physreva.97.023414.
Williams, Gareth O., Künzel, S., Daboussi, S., Iwan, B., Gonzalez, A. I., Boutu, W., Hilbert, V., Zastrau, U., Lee, H. J., Nagler, B., Granados, E., Galtier, E., Heimann, P., Barbrel, B., Dovillaire, G., Lee, R. W., Dunn, J., Recoules, V., Blancard, C., Renaudin, P., de la Varga, A. G., Velarde, P., Audebert, P., Merdji, H., Zeitoun, Ph., and Fajardo, M. Wed . "Tracking the ultrafast XUV optical properties of x-ray free-electron-laser heated matter with high-order harmonics". United States. doi:10.1103/physreva.97.023414.
@article{osti_1423540,
title = {Tracking the ultrafast XUV optical properties of x-ray free-electron-laser heated matter with high-order harmonics},
author = {Williams, Gareth O. and Künzel, S. and Daboussi, S. and Iwan, B. and Gonzalez, A. I. and Boutu, W. and Hilbert, V. and Zastrau, U. and Lee, H. J. and Nagler, B. and Granados, E. and Galtier, E. and Heimann, P. and Barbrel, B. and Dovillaire, G. and Lee, R. W. and Dunn, J. and Recoules, V. and Blancard, C. and Renaudin, P. and de la Varga, A. G. and Velarde, P. and Audebert, P. and Merdji, H. and Zeitoun, Ph. and Fajardo, M.},
abstractNote = {We present measurements of photon absorption by free electrons as a solid is transformed to plasma. A femtosecond x-ray free-electron laser is used to heat a solid, which separates the electron and ion heating time scales. The changes in absorption are measured with an independent probe pulse created through high-order-harmonic generation. We find an increase in electron temperature to have a relatively small impact on absorption, contrary to several predictions, whereas ion heating increases absorption. Here, we compare the data to current theoretical and numerical approaches and find that a smoother electronic structure yields a better fit to the data, suggestive of a temperature-dependent electronic structure in warm dense matter.},
doi = {10.1103/physreva.97.023414},
journal = {Physical Review A},
number = 2,
volume = 97,
place = {United States},
year = {Wed Feb 14 00:00:00 EST 2018},
month = {Wed Feb 14 00:00:00 EST 2018}
}

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