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Title: Collisional heating and adiabatic expansion of warm dense matter with intense relativistic electrons

Abstract

Adiabatic expansion of a warm dense Ti plasma has been observed after isochoric heating of a 100 - μm -thick Ti foil with an ~ 100-ns-long intense relativistic electron bunch at an energy of 19.8 MeV and a current of 1.7 kA. The expansion fits well with the analytical point-source solution. After 10 J is deposited and the plasma rapidly expands out of the warm dense phase, a stable degenerate plasma (T ~ 1.2 eV) with n e > 10 17 cm -3 is measured for > 100 ns. This is the first temporal measurement of the generation and adiabatic expansion of a large volume (3 × 10 -4 cm 3) of warm dense plasma isochorically heated by intense monochromatic electrons. The suite of diagnostics is presented, which includes time-resolved plasma plume expansion measurements on a single shot, visible spectroscopy measurements of the emission and absorption spectrum, measurements of the beam distribution, and plans for the future.

Authors:
ORCiD logo [1]; ORCiD logo [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1505963
Alternate Identifier(s):
OSTI ID: 1369586
Report Number(s):
LA-UR-16-28312
Journal ID: ISSN 2470-0045; PLEEE8
Grant/Contract Number:  
89233218CNA000001; AC52-06NA25396
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review E
Additional Journal Information:
Journal Volume: 96; Journal Issue: 1; Journal ID: ISSN 2470-0045
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; 70 PLASMA PHYSICS AND FUSION TECHNOLOGY

Citation Formats

Coleman, Joshua Eugene, and Colgan, James Patrick. Collisional heating and adiabatic expansion of warm dense matter with intense relativistic electrons. United States: N. p., 2017. Web. doi:10.1103/PhysRevE.96.013208.
Coleman, Joshua Eugene, & Colgan, James Patrick. Collisional heating and adiabatic expansion of warm dense matter with intense relativistic electrons. United States. doi:10.1103/PhysRevE.96.013208.
Coleman, Joshua Eugene, and Colgan, James Patrick. Thu . "Collisional heating and adiabatic expansion of warm dense matter with intense relativistic electrons". United States. doi:10.1103/PhysRevE.96.013208. https://www.osti.gov/servlets/purl/1505963.
@article{osti_1505963,
title = {Collisional heating and adiabatic expansion of warm dense matter with intense relativistic electrons},
author = {Coleman, Joshua Eugene and Colgan, James Patrick},
abstractNote = {Adiabatic expansion of a warm dense Ti plasma has been observed after isochoric heating of a 100 - μm -thick Ti foil with an ~ 100-ns-long intense relativistic electron bunch at an energy of 19.8 MeV and a current of 1.7 kA. The expansion fits well with the analytical point-source solution. After 10 J is deposited and the plasma rapidly expands out of the warm dense phase, a stable degenerate plasma (T ~ 1.2 eV) with ne > 1017 cm-3 is measured for > 100 ns. This is the first temporal measurement of the generation and adiabatic expansion of a large volume (3 × 10-4 cm3) of warm dense plasma isochorically heated by intense monochromatic electrons. The suite of diagnostics is presented, which includes time-resolved plasma plume expansion measurements on a single shot, visible spectroscopy measurements of the emission and absorption spectrum, measurements of the beam distribution, and plans for the future.},
doi = {10.1103/PhysRevE.96.013208},
journal = {Physical Review E},
number = 1,
volume = 96,
place = {United States},
year = {2017},
month = {7}
}

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