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Title: Direct measurements of the ionization potential depression in a dense plasma

Abstract

We have used the Linac Coherent Light Source to generate solid-density aluminum plasmas at temperatures of up to 180 eV. By varying the photon energy of the x rays that both create and probe the plasma, and observing the K-α fluorescence, we can directly measure the position of the K edge of the highly charged ions within the system. Lastly, the results are found to disagree with the predictions of the extensively used Stewart-Pyatt model, but are consistent with the earlier model of Ecker and Kroll, which predicts significantly greater depression of the ionization potential.

Authors:
 [1];  [1];  [2];  [3];  [4];  [5];  [5];  [3];  [6];  [7];  [5];  [1];  [5];  [7];  [7];  [7];  [1];  [8];  [1];  [7] more »;  [7];  [9];  [7];  [5];  [7];  [7];  [10];  [7];  [7];  [3];  [7];  [1] « less
  1. Univ. of Oxford, Oxford (United Kingdom)
  2. Atomic and Molecular Data Unit, Vienna (Austria)
  3. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  4. AWE Aldermaston, Reading (United Kingdom)
  5. Institute of Physics ASCR, Prague (Czech Republic)
  6. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of California, Berkeley, CA (United States)
  7. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  8. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  9. Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)
  10. Friedrich-Schiller-Univ., Jena (Germany)
Publication Date:
Research Org.:
Univ. of California, Berkeley, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1334506
Alternate Identifier(s):
OSTI ID: 1103070
Grant/Contract Number:  
FG52-06NA26212
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 109; Journal Issue: 6; 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

Ciricosta, O., Vinko, S. M., Chung, H. -K., Cho, B. -I., Brown, C. R. D., Burian, T., Chalupsky, J., Engelhorn, K., Falcone, R. W., Graves, C., Hajkova, V., Higginbotham, A., Juha, L., Krzywinski, J., Lee, H. J., Messerschmidt, M., Murphy, C. D., Ping, Y., Rackstraw, D. S., Scherz, A., Schlotter, W., Toleikis, S., Turner, J. J., Vysin, L., Wang, T., Wu, B., Zastrau, U., Zhu, D., Lee, R. W., Heimann, P., Nagler, B., and Wark, Justin S. Direct measurements of the ionization potential depression in a dense plasma. United States: N. p., 2012. Web. doi:10.1103/PhysRevLett.109.065002.
Ciricosta, O., Vinko, S. M., Chung, H. -K., Cho, B. -I., Brown, C. R. D., Burian, T., Chalupsky, J., Engelhorn, K., Falcone, R. W., Graves, C., Hajkova, V., Higginbotham, A., Juha, L., Krzywinski, J., Lee, H. J., Messerschmidt, M., Murphy, C. D., Ping, Y., Rackstraw, D. S., Scherz, A., Schlotter, W., Toleikis, S., Turner, J. J., Vysin, L., Wang, T., Wu, B., Zastrau, U., Zhu, D., Lee, R. W., Heimann, P., Nagler, B., & Wark, Justin S. Direct measurements of the ionization potential depression in a dense plasma. United States. https://doi.org/10.1103/PhysRevLett.109.065002
Ciricosta, O., Vinko, S. M., Chung, H. -K., Cho, B. -I., Brown, C. R. D., Burian, T., Chalupsky, J., Engelhorn, K., Falcone, R. W., Graves, C., Hajkova, V., Higginbotham, A., Juha, L., Krzywinski, J., Lee, H. J., Messerschmidt, M., Murphy, C. D., Ping, Y., Rackstraw, D. S., Scherz, A., Schlotter, W., Toleikis, S., Turner, J. J., Vysin, L., Wang, T., Wu, B., Zastrau, U., Zhu, D., Lee, R. W., Heimann, P., Nagler, B., and Wark, Justin S. Mon . "Direct measurements of the ionization potential depression in a dense plasma". United States. https://doi.org/10.1103/PhysRevLett.109.065002. https://www.osti.gov/servlets/purl/1334506.
@article{osti_1334506,
title = {Direct measurements of the ionization potential depression in a dense plasma},
author = {Ciricosta, O. and Vinko, S. M. and Chung, H. -K. and Cho, B. -I. and Brown, C. R. D. and Burian, T. and Chalupsky, J. and Engelhorn, K. and Falcone, R. W. and Graves, C. and Hajkova, V. and Higginbotham, A. and Juha, L. and Krzywinski, J. and Lee, H. J. and Messerschmidt, M. and Murphy, C. D. and Ping, Y. and Rackstraw, D. S. and Scherz, A. and Schlotter, W. and Toleikis, S. and Turner, J. J. and Vysin, L. and Wang, T. and Wu, B. and Zastrau, U. and Zhu, D. and Lee, R. W. and Heimann, P. and Nagler, B. and Wark, Justin S.},
abstractNote = {We have used the Linac Coherent Light Source to generate solid-density aluminum plasmas at temperatures of up to 180 eV. By varying the photon energy of the x rays that both create and probe the plasma, and observing the K-α fluorescence, we can directly measure the position of the K edge of the highly charged ions within the system. Lastly, the results are found to disagree with the predictions of the extensively used Stewart-Pyatt model, but are consistent with the earlier model of Ecker and Kroll, which predicts significantly greater depression of the ionization potential.},
doi = {10.1103/PhysRevLett.109.065002},
journal = {Physical Review Letters},
number = 6,
volume = 109,
place = {United States},
year = {2012},
month = {8}
}

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Cited by: 107 works
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Figures / Tables:

FIG. 1 FIG. 1: (Color online) Experimentally recorded K-α emission spectra from hot solid density aluminum. SCFLY simulations with different IPD models are compared with the experimental data for a subset of the X-ray laser photon energies. From the bottom the spectra corresponding to 1580, 1600, 1630, 1650, 1720 and 1830 eVmore » pump photon energies are shown. The spectra have been artificially displaced in intensity for clarity, and a Bremsstrahlung component (at the maximum temperature provided by the simulations) has been added to the calculated spectra. The grey shading indicates the difference between the calculations using different IPD models.« less

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