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Title: Spatially and temporally resolved measurements of a dense copper plasma heated by intense relativistic electrons

Abstract

A 100-μm-thick Cu foil is isochorically heated by a ~100-ns-long electron bunch with an energy of 19.8 MeV and current of 1.7 kA to Te > 1 eV. After 100 ns of heating and 20 ns of expansion, the plasma exhibits a stable, quiescent temperature and density distribution for >200 ns. Several intense Cu-I emission lines are observed after ~20 J of electron beam energy is deposited. These lines have well known Stark widths providing a direct measurement of ne. The Los Alamos ATOMIC code [Magee et al., AIP Conf. Proc. 2004, 168–179 and Hakel et al., J. Quant. Spectrosc. Radiat. Transfer 99, 265 (2006)] was run in local-thermodynamic-equilibrium mode to estimate Te and ne. Spatially and temporally resolved measurements are then presented in both the vertical and horizontal directions adjacent to the foil indicating temperatures >1 eV and densities ranging from 1–3 × 1017 cm-3 after expansion and cooling.

Authors:
ORCiD logo [1]; ORCiD logo [1]
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  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Research Org.:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1467263
Alternate Identifier(s):
OSTI ID: 1376974
Report Number(s):
LA-UR-17-24434
Journal ID: ISSN 1070-664X
Grant/Contract Number:  
AC52-06NA25396
Resource Type:
Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 24; Journal Issue: 8; Journal ID: ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; collisional energy loss; metalloids; lasers; hydrology; particle beams; hydrodynamics; stark effect; plasmas; x-ray absorption spectroscopy; density measurement

Citation Formats

Coleman, Joshua Eugene, and Colgan, James Patrick. Spatially and temporally resolved measurements of a dense copper plasma heated by intense relativistic electrons. United States: N. p., 2017. Web. doi:10.1063/1.4989797.
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Coleman, Joshua Eugene, & Colgan, James Patrick. Spatially and temporally resolved measurements of a dense copper plasma heated by intense relativistic electrons. United States. https://doi.org/10.1063/1.4989797
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Coleman, Joshua Eugene, and Colgan, James Patrick. Fri . "Spatially and temporally resolved measurements of a dense copper plasma heated by intense relativistic electrons". United States. https://doi.org/10.1063/1.4989797. https://www.osti.gov/servlets/purl/1467263.
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@article{osti_1467263,
title = {Spatially and temporally resolved measurements of a dense copper plasma heated by intense relativistic electrons},
author = {Coleman, Joshua Eugene and Colgan, James Patrick},
abstractNote = {A 100-μm-thick Cu foil is isochorically heated by a ~100-ns-long electron bunch with an energy of 19.8 MeV and current of 1.7 kA to Te > 1 eV. After 100 ns of heating and 20 ns of expansion, the plasma exhibits a stable, quiescent temperature and density distribution for >200 ns. Several intense Cu-I emission lines are observed after ~20 J of electron beam energy is deposited. These lines have well known Stark widths providing a direct measurement of ne. The Los Alamos ATOMIC code [Magee et al., AIP Conf. Proc. 2004, 168–179 and Hakel et al., J. Quant. Spectrosc. Radiat. Transfer 99, 265 (2006)] was run in local-thermodynamic-equilibrium mode to estimate Te and ne. Spatially and temporally resolved measurements are then presented in both the vertical and horizontal directions adjacent to the foil indicating temperatures >1 eV and densities ranging from 1–3 × 1017 cm-3 after expansion and cooling.},
doi = {10.1063/1.4989797},
journal = {Physics of Plasmas},
number = 8,
volume = 24,
place = {United States},
year = {Fri Aug 25 00:00:00 EDT 2017},
month = {Fri Aug 25 00:00:00 EDT 2017}
}
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https://doi.org/10.1063/1.4989797
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