Time-Resolved XUV Opacity Measurements of Warm Dense Aluminum
Abstract
The free-free opacity in plasmas is fundamental to our understanding of energy transport in stellar interiors and for inertial confinement fusion research. However, theoretical predictions in the challenging dense plasma regime are conflicting and there is a dearth of accurate experimental data to allow for direct model validation. Here we present time-resolved transmission measurements in solid-density Al heated by an XUV free-electron laser. We use a novel functional optimization approach to extract the temperaturedependent absorption coefficient directly from an oversampled pool of single-shot measurements, and find a pronounced enhancement of the opacity as the plasma is heated to temperatures of order of the Fermi energy. Plasma heating and opacity enhancement are observed on ultrafast timescales, within the duration of the femtosecond XUV pulse. We attribute further rises in the opacity on ps timescales to melt and the formation of warm dense matter
- Authors:
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[1];
[2];
[4];
[6];
[4];
[8];
[5];
more »
- Univ. of Oxford (United Kingdom)
- Charles Univ., Prague (Czech Republic); Czech Academy of Science, Prague (Czech Republic)
- Czech Academy of Science, Prague (Czech Republic); Chalmers Univ. of Technology, Goteburg (Sweden)
- Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)
- European X-ray Free-Electron Laser (XFEL), Hamburg (Germany)
- Czech Academy of Science, Prague (Czech Republic)
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Czech Academy of Science, Prague (Czech Republic); Uppsala Univ. (Sweden)
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Uppsala Univ. (Sweden)
- Univ. Munster (Germany)
- Publication Date:
- Research Org.:
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1637905
- Grant/Contract Number:
- AC02-76SF00515; CALIPSO 312284; EP/P015794/1; 17-05167S; 19-03314S; CZ.02.1.01/0.0/0.0/16_019/0000789 (ADONIS); CZ.02.1.01/0.0/0.0/15_003/0000447 (ELIBIO); 05K13PM2; LTT17015; CZ.02.1.01/0.0/0.0/16_013/0001552
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review Letters
- Additional Journal Information:
- Journal Volume: 124; Journal Issue: 22; Journal ID: ISSN 0031-9007
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY
Citation Formats
Vinko, S. M., Vozda, V., Andreasson, J., Bajt, S., Bielecki, J., Burian, T., Chalupsky, J., Ciricosta, O., Desjarlais, M. P., Fleckenstein, H., Hajdu, J., Hajkova, V., Hollebon, P., Juha, L., Kasim, M. F., McBride, E. E., Muehlig, K., Preston, T. R., Rackstraw, D. S., Roling, S., Toleikis, S., Wark, J. S., and Zacharias, H. Time-Resolved XUV Opacity Measurements of Warm Dense Aluminum. United States: N. p., 2020.
Web. doi:10.1103/physrevlett.124.225002.
Vinko, S. M., Vozda, V., Andreasson, J., Bajt, S., Bielecki, J., Burian, T., Chalupsky, J., Ciricosta, O., Desjarlais, M. P., Fleckenstein, H., Hajdu, J., Hajkova, V., Hollebon, P., Juha, L., Kasim, M. F., McBride, E. E., Muehlig, K., Preston, T. R., Rackstraw, D. S., Roling, S., Toleikis, S., Wark, J. S., & Zacharias, H. Time-Resolved XUV Opacity Measurements of Warm Dense Aluminum. United States. https://doi.org/10.1103/physrevlett.124.225002
Vinko, S. M., Vozda, V., Andreasson, J., Bajt, S., Bielecki, J., Burian, T., Chalupsky, J., Ciricosta, O., Desjarlais, M. P., Fleckenstein, H., Hajdu, J., Hajkova, V., Hollebon, P., Juha, L., Kasim, M. F., McBride, E. E., Muehlig, K., Preston, T. R., Rackstraw, D. S., Roling, S., Toleikis, S., Wark, J. S., and Zacharias, H. Thu .
"Time-Resolved XUV Opacity Measurements of Warm Dense Aluminum". United States. https://doi.org/10.1103/physrevlett.124.225002. https://www.osti.gov/servlets/purl/1637905.
@article{osti_1637905,
title = {Time-Resolved XUV Opacity Measurements of Warm Dense Aluminum},
author = {Vinko, S. M. and Vozda, V. and Andreasson, J. and Bajt, S. and Bielecki, J. and Burian, T. and Chalupsky, J. and Ciricosta, O. and Desjarlais, M. P. and Fleckenstein, H. and Hajdu, J. and Hajkova, V. and Hollebon, P. and Juha, L. and Kasim, M. F. and McBride, E. E. and Muehlig, K. and Preston, T. R. and Rackstraw, D. S. and Roling, S. and Toleikis, S. and Wark, J. S. and Zacharias, H.},
abstractNote = {The free-free opacity in plasmas is fundamental to our understanding of energy transport in stellar interiors and for inertial confinement fusion research. However, theoretical predictions in the challenging dense plasma regime are conflicting and there is a dearth of accurate experimental data to allow for direct model validation. Here we present time-resolved transmission measurements in solid-density Al heated by an XUV free-electron laser. We use a novel functional optimization approach to extract the temperaturedependent absorption coefficient directly from an oversampled pool of single-shot measurements, and find a pronounced enhancement of the opacity as the plasma is heated to temperatures of order of the Fermi energy. Plasma heating and opacity enhancement are observed on ultrafast timescales, within the duration of the femtosecond XUV pulse. We attribute further rises in the opacity on ps timescales to melt and the formation of warm dense matter},
doi = {10.1103/physrevlett.124.225002},
journal = {Physical Review Letters},
number = 22,
volume = 124,
place = {United States},
year = {2020},
month = {6}
}
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