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

Coleman, Joshua Eugene; Colgan, James Patrick

doi:10.1103/PhysRevE.96.013208

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

Journal Article · Thu Jul 13 00:00:00 EDT 2017 · Physical Review E

DOI:https://doi.org/10.1103/PhysRevE.96.013208· OSTI ID:1505963

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Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

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 > 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.

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Research Organization:: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: 89233218CNA000001; AC52-06NA25396

OSTI ID:: 1505963

Alternate ID(s):: OSTI ID: 1369586

Report Number(s):: LA-UR-16-28312; PLEEE8

Journal Information:: Physical Review E, Vol. 96, Issue 1; ISSN 2470-0045

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 5 works

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