Molecular dynamics simulations of ejecta formation in helium-implanted copper
Abstract
The effect of He concentration and morphology on ejecta production is investigated via molecular dy- namics simulations. Identical He concentrations are inserted into Cu single crystals as interstitial atoms or bubbles near a flat free surface. The resulting ejecta is quantified through total mass, cluster size, and velocity of ejected particles. The presence of He increases total ejected mass as compared to pure Cu; He bubbles produce 56% more mass than atomic He. This increase is attributed to non-planarities in the shock front and reflected pulse due to He bubbles, akin to ejecta resulting from traditional Richtmeyer–Meshkov instabilities.
- Publication Date:
- Research Org.:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States); Univ. of California, San Diego, CA (United States)
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA)
- OSTI Identifier:
- 1591978
- Alternate Identifier(s):
- OSTI ID: 1597350; OSTI ID: 1633892
- Report Number(s):
- LA-UR-19-27391
Journal ID: ISSN 1359-6462; S1359646219306487; PII: S1359646219306487
- Grant/Contract Number:
- 89233218CNA000001; NA0003842
- Resource Type:
- Published Article
- Journal Name:
- Scripta Materialia
- Additional Journal Information:
- Journal Name: Scripta Materialia Journal Volume: 178 Journal Issue: C; Journal ID: ISSN 1359-6462
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; Molecular dynamics; Ejecta; Dynamic behavior
Citation Formats
Flanagan, R. M., Hahn, E. N., Germann, T. C., Meyers, M. A., and Fensin, S. J. Molecular dynamics simulations of ejecta formation in helium-implanted copper. United States: N. p., 2019.
Web. doi:10.1016/j.scriptamat.2019.11.005.
Flanagan, R. M., Hahn, E. N., Germann, T. C., Meyers, M. A., & Fensin, S. J. Molecular dynamics simulations of ejecta formation in helium-implanted copper. United States. https://doi.org/10.1016/j.scriptamat.2019.11.005
Flanagan, R. M., Hahn, E. N., Germann, T. C., Meyers, M. A., and Fensin, S. J. Sat .
"Molecular dynamics simulations of ejecta formation in helium-implanted copper". United States. https://doi.org/10.1016/j.scriptamat.2019.11.005.
@article{osti_1591978,
title = {Molecular dynamics simulations of ejecta formation in helium-implanted copper},
author = {Flanagan, R. M. and Hahn, E. N. and Germann, T. C. and Meyers, M. A. and Fensin, S. J.},
abstractNote = {The effect of He concentration and morphology on ejecta production is investigated via molecular dy- namics simulations. Identical He concentrations are inserted into Cu single crystals as interstitial atoms or bubbles near a flat free surface. The resulting ejecta is quantified through total mass, cluster size, and velocity of ejected particles. The presence of He increases total ejected mass as compared to pure Cu; He bubbles produce 56% more mass than atomic He. This increase is attributed to non-planarities in the shock front and reflected pulse due to He bubbles, akin to ejecta resulting from traditional Richtmeyer–Meshkov instabilities.},
doi = {10.1016/j.scriptamat.2019.11.005},
journal = {Scripta Materialia},
number = C,
volume = 178,
place = {United States},
year = {Sat Nov 16 00:00:00 EST 2019},
month = {Sat Nov 16 00:00:00 EST 2019}
}
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https://doi.org/10.1016/j.scriptamat.2019.11.005
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