Observations of Continuum Depression in Warm Dense Matter with X-Ray Thomson Scattering
Abstract
Detailed measurements of the electron densities, temperatures, and ionization states of compressed CH shells approaching pressures of 50 Mbar are achieved with spectrally resolved x-ray scattering. Laser- produced 9 keV x-rays probe the plasma during the transient state of three-shock coalescence. High signal- to-noise x-ray scattering spectra show direct evidence of continuum depression in highly degenerate warm dense matter states with electron densities $$n_e$$ > 1024 cm–3. Furthermore, the measured densities and temperatures agree well with radiation-hydrodynamic modeling when accounting for continuum lowering in calculations that employ detailed configuration accounting.
- Authors:
-
- SLAC National Accelerator Lab., Menlo Park, CA (United States); Univ. of California, Berkeley, CA (United States)
- Lawrence Livermore National Lab. (LLNL), Univ. of California, Livermore, CA (United States)
- Max-Planck-Institut fur die Physik Komplexer Systeme, Dresden (Germany)
- AWE plc, Reading (United Kingdom); Univ. of Warwick, Coventry (United Kingdom)
- Univ. of Warwick, Coventry (United Kingdom)
- Univ. of Washington, Seattle, WA (United States)
- Univ. of Oxford, Oxford (United Kingdom)
- Univ. of California, Berkeley, CA (United States)
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Publication Date:
- Research Org.:
- University of California, Berkeley, CA (United States); Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA); USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE Office of Science (SC), Fusion Energy Sciences (FES); USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division; Engineering and Physical Sciences Research Council (EPSRC)
- OSTI Identifier:
- 1334520
- Grant/Contract Number:
- NA0000910; AC52-07NA27344; 11-ER-050; FWP 100182; AC02-76SF00515; FG52-07NA28057; FG52-09NA29035; EP/G007187/1; SC0008580
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review Letters
- Additional Journal Information:
- Journal Volume: 112; Journal Issue: 14; Journal ID: ISSN 0031-9007
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 73 NUCLEAR PHYSICS AND RADIATION PHYSICS
Citation Formats
Fletcher, L. B., Kritcher, A. L., Pak, A., Ma, T., Doppner, T., Fortmann, C., Divol, L., Jones, O. S., Landen, O. L., Scott, H. A., Vorberger, J., Chapman, D. A., Gericke, D. O., Mattern, B. A., Seidler, G. T., Gregori, G., Falcone, R. W., and Glenzer, S. H. Observations of Continuum Depression in Warm Dense Matter with X-Ray Thomson Scattering. United States: N. p., 2014.
Web. doi:10.1103/PhysRevLett.112.145004.
Fletcher, L. B., Kritcher, A. L., Pak, A., Ma, T., Doppner, T., Fortmann, C., Divol, L., Jones, O. S., Landen, O. L., Scott, H. A., Vorberger, J., Chapman, D. A., Gericke, D. O., Mattern, B. A., Seidler, G. T., Gregori, G., Falcone, R. W., & Glenzer, S. H. Observations of Continuum Depression in Warm Dense Matter with X-Ray Thomson Scattering. United States. https://doi.org/10.1103/PhysRevLett.112.145004
Fletcher, L. B., Kritcher, A. L., Pak, A., Ma, T., Doppner, T., Fortmann, C., Divol, L., Jones, O. S., Landen, O. L., Scott, H. A., Vorberger, J., Chapman, D. A., Gericke, D. O., Mattern, B. A., Seidler, G. T., Gregori, G., Falcone, R. W., and Glenzer, S. H. Thu .
"Observations of Continuum Depression in Warm Dense Matter with X-Ray Thomson Scattering". United States. https://doi.org/10.1103/PhysRevLett.112.145004. https://www.osti.gov/servlets/purl/1334520.
@article{osti_1334520,
title = {Observations of Continuum Depression in Warm Dense Matter with X-Ray Thomson Scattering},
author = {Fletcher, L. B. and Kritcher, A. L. and Pak, A. and Ma, T. and Doppner, T. and Fortmann, C. and Divol, L. and Jones, O. S. and Landen, O. L. and Scott, H. A. and Vorberger, J. and Chapman, D. A. and Gericke, D. O. and Mattern, B. A. and Seidler, G. T. and Gregori, G. and Falcone, R. W. and Glenzer, S. H.},
abstractNote = {Detailed measurements of the electron densities, temperatures, and ionization states of compressed CH shells approaching pressures of 50 Mbar are achieved with spectrally resolved x-ray scattering. Laser- produced 9 keV x-rays probe the plasma during the transient state of three-shock coalescence. High signal- to-noise x-ray scattering spectra show direct evidence of continuum depression in highly degenerate warm dense matter states with electron densities $n_e$ > 1024 cm–3. Furthermore, the measured densities and temperatures agree well with radiation-hydrodynamic modeling when accounting for continuum lowering in calculations that employ detailed configuration accounting.},
doi = {10.1103/PhysRevLett.112.145004},
journal = {Physical Review Letters},
number = 14,
volume = 112,
place = {United States},
year = {Thu Apr 10 00:00:00 EDT 2014},
month = {Thu Apr 10 00:00:00 EDT 2014}
}
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