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Title: Proton radiography measurements and models of ejecta structure in shocked Sn

Abstract

We present the experimental validation of ejecta source, mass and velocity models using proton radiography. Ejecta mass and velocity measurements were performed under 7 atm of He gas on Sn targets with 4 concentric sinusoidal features with radial wavelength of λ=2 mm and amplitude η0= 0.159 mm. 42 images at 275 and 400 ns intervals were obtained between 0 and 14 µs from the time of shock breakout. Volume density profiles for the spikes were determined through Abel inversion and spike, bubble and surface velocities were determined using proton radiography and also verified through Photon Doppler Velocimetry (PDV). Ejecta sheets evolve to a self-similar density distribution that depends on a scaling variable z/ηst where η˙s is the spike tip velocity, z is the distance from the free surface and t is the time after shock breakout. Both the density profiles and the time dependence of the mass per unit area in the evolving spikes are in good agreement with a Richtmyer-Meshkov instability based model for ejecta production and evolution.

Authors:
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1];  [1]; ORCiD logo [1]; ORCiD logo [2]
+ Show Author Affiliations
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Los Alamos National Laboratory
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA), Office of Defense Programs (DP)
OSTI Identifier:
1601389
Report Number(s):
LA-UR-17-28479
Journal ID: ISSN 0094-243X; TRN: US2103731
Grant/Contract Number:  
89233218CNA000001
Resource Type:
Accepted Manuscript
Journal Name:
AIP Conference Proceedings
Additional Journal Information:
Journal Volume: 1979; Conference: 20.Biennial APS Conference on Shock Compression of Condensed Matter (SCCM-2017), St. Louis, MO (United States), 9-14 Jul 2017; Journal ID: ISSN 0094-243X
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Hammerberg, James Edward, Buttler, William Tillman, Llobet Megias, Anna, Morris, Christopher, Goett, John Jerome III, Manzanares, Ruben, Saunders, Alexander, Schmidt, Derek William, Tainter, Amy Marie, McNeil, Wendy Vogan, and Wilde, Carl Huerstel. Proton radiography measurements and models of ejecta structure in shocked Sn. United States: N. p., 2018. Web. doi:10.1063/1.5044848.
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Hammerberg, James Edward, Buttler, William Tillman, Llobet Megias, Anna, Morris, Christopher, Goett, John Jerome III, Manzanares, Ruben, Saunders, Alexander, Schmidt, Derek William, Tainter, Amy Marie, McNeil, Wendy Vogan, & Wilde, Carl Huerstel. Proton radiography measurements and models of ejecta structure in shocked Sn. United States. https://doi.org/10.1063/1.5044848
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Hammerberg, James Edward, Buttler, William Tillman, Llobet Megias, Anna, Morris, Christopher, Goett, John Jerome III, Manzanares, Ruben, Saunders, Alexander, Schmidt, Derek William, Tainter, Amy Marie, McNeil, Wendy Vogan, and Wilde, Carl Huerstel. Tue . "Proton radiography measurements and models of ejecta structure in shocked Sn". United States. https://doi.org/10.1063/1.5044848. https://www.osti.gov/servlets/purl/1601389.
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@article{osti_1601389,
title = {Proton radiography measurements and models of ejecta structure in shocked Sn},
author = {Hammerberg, James Edward and Buttler, William Tillman and Llobet Megias, Anna and Morris, Christopher and Goett, John Jerome III and Manzanares, Ruben and Saunders, Alexander and Schmidt, Derek William and Tainter, Amy Marie and McNeil, Wendy Vogan and Wilde, Carl Huerstel},
abstractNote = {We present the experimental validation of ejecta source, mass and velocity models using proton radiography. Ejecta mass and velocity measurements were performed under 7 atm of He gas on Sn targets with 4 concentric sinusoidal features with radial wavelength of λ=2 mm and amplitude η0= 0.159 mm. 42 images at 275 and 400 ns intervals were obtained between 0 and 14 µs from the time of shock breakout. Volume density profiles for the spikes were determined through Abel inversion and spike, bubble and surface velocities were determined using proton radiography and also verified through Photon Doppler Velocimetry (PDV). Ejecta sheets evolve to a self-similar density distribution that depends on a scaling variable z/ηst where η˙s is the spike tip velocity, z is the distance from the free surface and t is the time after shock breakout. Both the density profiles and the time dependence of the mass per unit area in the evolving spikes are in good agreement with a Richtmyer-Meshkov instability based model for ejecta production and evolution.},
doi = {10.1063/1.5044848},
journal = {AIP Conference Proceedings},
number = ,
volume = 1979,
place = {United States},
year = {2018},
month = {7}
}
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https://doi.org/10.1063/1.5044848
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Works referenced in this record:

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New Developments in Proton Radiography at the Los Alamos Neutron Science Center (LANSCE)
journal, December 2015

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    Works referencing / citing this record:

    Ejecta velocities in twice-shocked liquid metals under extreme conditions: A hydrodynamic approach
    journal, July 2019

    • Karkhanis, V.; Ramaprabhu, P.
    • Matter and Radiation at Extremes, Vol. 4, Issue 4
    • DOI: 10.1063/1.5088162

    X-ray fluorescence imaging of jet flow in laser driven high-energy-density experiments
    journal, July 2019

    • Pu, Yudong; Yao, Li; Zheng, Jianhua
    • Physics of Plasmas, Vol. 26, Issue 7
    • DOI: 10.1063/1.5080408
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