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Measurement of Charged-Particle Stopping in Warm Dense Plasma

Author(s)
Grabowski, P. E.; Collins, G. W.; Fitzsimmons, P.; Glenzer, S. H.; Graziani, F.; Hansen, S. B.; Hu, S. X.; Keiter, P.; Reynolds, H.; Rygg, J. R.; Zylstra, Alex Bennett; Frenje, Johan A.; Li, Chikang; Gatu Johnson, Maria; Seguin, Fredrick Hampton; Petrasso, Richard D.; ... Show more Show less
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Abstract
We measured the stopping of energetic protons in an isochorically heated solid-density Be plasma with an electron temperature of ~32  eV, corresponding to moderately coupled [(e[superscript 2]/a)/(k[subscript B]T[subscript e] + E[subscript F]) ~ 0.3] and moderately degenerate [k[subscript B]T[subscript e]/E[subscript F] ~ 2] “warm-dense matter” (WDM) conditions. We present the first high-accuracy measurements of charged-particle energy loss through dense plasma, which shows an increased loss relative to cold matter, consistent with a reduced mean ionization potential. The data agree with stopping models based on an ad hoc treatment of free and bound electrons, as well as the average-atom local-density approximation; this work is the first test of these theories in WDM plasma.
Date issued
2015-05
URI
http://hdl.handle.net/1721.1/97134
Department
Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Plasma Science and Fusion Center
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Zylstra, A. B., J. A. Frenje, P. E. Grabowski, C. K. Li, G. W. Collins, P. Fitzsimmons, S. Glenzer, et al. “Measurement of Charged-Particle Stopping in Warm Dense Plasma.” Physical Review Letters 114, no. 21 (May 2015). © 2015 American Physical Society
Version: Final published version
ISSN
0031-9007
1079-7114

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