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Title: Compton scattering measurements from dense plasmas

Abstract

Here, Compton scattering techniques have been developed for accurate measurements of densities and temperatures in dense plasmas. One future challenge is the application of this technique to characterize compressed matter on the National Ignition Facility where hydrogen and beryllium will approach extremely dense states of matter of up to 1000 g/cc. In this regime, the density, compressibility, and capsule fuel adiabat may be directly measured from the Compton scattered spectrum of a high-energy x-ray line source. Specifically, the scattered spectra directly reflect the electron velocity distribution. In non-degenerate plasmas, the width provides an accurate measure of the electron temperatures, while in partially Fermi degenerate systems that occur in laser-compressed matter it provides the Fermi energy and hence the electron density. Both of these regimes have been accessed in experiments at the Omega laser by employing isochorically heated solid-density beryllium and moderately compressed beryllium foil targets. In the latter experiment, compressions by a factor of 3 at pressures of 40 Mbar have been measured in excellent agreement with radiation hydrodynamic modeling.

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [1];  [2];  [2];  [2];  [3];  [3];  [3];  [4];  [5];  [5];  [5]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  2. Univ. of California, Berkeley, CA (United States)
  3. Lab. for Laser Energetics, Rochester, NY (United States)
  4. Univ. of Oxford, Oxford (United Kingdom)
  5. Univ. Rostock, Rostock (Germany)
Publication Date:
Research Org.:
Univ. of California, Berkeley, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1334258
Alternate Identifier(s):
OSTI ID: 1334336
Grant/Contract Number:  
FG52-07NA28057; FG52-06NA26212
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Physics. Conference Series (Online)
Additional Journal Information:
Journal Name: Journal of Physics. Conference Series (Online); Journal Volume: 112; Journal Issue: 3; Journal ID: ISSN 1742-6596
Publisher:
Institute of Physics (IOP)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY

Citation Formats

Glenzer, S. H., Neumayer, P., Doppner, T., Landen, O. L., Lee, R. W., Wallace, R. J., Weber, S., Lee, H. J., Kritcher, A. L., Falcone, R., Regan, S. P., Sawada, H., Meyerhofer, D. D., Gregori, G., Fortmann, C., Schwarz, V., and Redmer, R. Compton scattering measurements from dense plasmas. United States: N. p., 2008. Web. doi:10.1088/1742-6596/112/3/032071.
Glenzer, S. H., Neumayer, P., Doppner, T., Landen, O. L., Lee, R. W., Wallace, R. J., Weber, S., Lee, H. J., Kritcher, A. L., Falcone, R., Regan, S. P., Sawada, H., Meyerhofer, D. D., Gregori, G., Fortmann, C., Schwarz, V., & Redmer, R. Compton scattering measurements from dense plasmas. United States. doi:10.1088/1742-6596/112/3/032071.
Glenzer, S. H., Neumayer, P., Doppner, T., Landen, O. L., Lee, R. W., Wallace, R. J., Weber, S., Lee, H. J., Kritcher, A. L., Falcone, R., Regan, S. P., Sawada, H., Meyerhofer, D. D., Gregori, G., Fortmann, C., Schwarz, V., and Redmer, R. Thu . "Compton scattering measurements from dense plasmas". United States. doi:10.1088/1742-6596/112/3/032071. https://www.osti.gov/servlets/purl/1334258.
@article{osti_1334258,
title = {Compton scattering measurements from dense plasmas},
author = {Glenzer, S. H. and Neumayer, P. and Doppner, T. and Landen, O. L. and Lee, R. W. and Wallace, R. J. and Weber, S. and Lee, H. J. and Kritcher, A. L. and Falcone, R. and Regan, S. P. and Sawada, H. and Meyerhofer, D. D. and Gregori, G. and Fortmann, C. and Schwarz, V. and Redmer, R.},
abstractNote = {Here, Compton scattering techniques have been developed for accurate measurements of densities and temperatures in dense plasmas. One future challenge is the application of this technique to characterize compressed matter on the National Ignition Facility where hydrogen and beryllium will approach extremely dense states of matter of up to 1000 g/cc. In this regime, the density, compressibility, and capsule fuel adiabat may be directly measured from the Compton scattered spectrum of a high-energy x-ray line source. Specifically, the scattered spectra directly reflect the electron velocity distribution. In non-degenerate plasmas, the width provides an accurate measure of the electron temperatures, while in partially Fermi degenerate systems that occur in laser-compressed matter it provides the Fermi energy and hence the electron density. Both of these regimes have been accessed in experiments at the Omega laser by employing isochorically heated solid-density beryllium and moderately compressed beryllium foil targets. In the latter experiment, compressions by a factor of 3 at pressures of 40 Mbar have been measured in excellent agreement with radiation hydrodynamic modeling.},
doi = {10.1088/1742-6596/112/3/032071},
journal = {Journal of Physics. Conference Series (Online)},
number = 3,
volume = 112,
place = {United States},
year = {2008},
month = {6}
}

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