Measurement of the shell decompression in direct-drive inertial-confinement-fusion implosions
Abstract
Measurement of the effect of adiabat (α) on the shell thickness were performed in direct-drive implosions. When reducing the adiabat of the shell from α = 6 to α = 4:5, the shell thickness was measured to decrease from 75 μm to 60 μm, but when decreasing the adiabat further (α = 1:8), the shell thickness was measured to increase to 75 μm. The measured shell thickness, shell trajectories, neutron bang time, and neutron yield were reproduced by two dimensional simulations that include laser imprint, nonlocal thermal transport, cross-beam energy transfer, and first-principles equation-of-state models. The minimum core size was measured to decrease from 40 μm to 30 μm, consistent with the reduction of the adiabat from α = 6 to α = 1:8. Simulations that neglected imprint reproduced the measured core size of the entire adiabat scan, but signi cantly underestimate the shell thickness for adiabat below ~3. These results show that the decompression of the shell measured for low-adiabat implosions was a result of laser imprint.
- Authors:
-
- Univ. of Rochester, NY (United States). Lab. for Laser Energetics
- Publication Date:
- Research Org.:
- Univ. of Rochester, NY (United States). Lab. for Laser Energetics
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA)
- OSTI Identifier:
- 1357236
- Alternate Identifier(s):
- OSTI ID: 1356450
- Report Number(s):
- DOE/Rochester-2016-103-1339
Journal ID: ISSN 2470-0045; PLEEE8; 2016-103, 1339, 2293
- Grant/Contract Number:
- NA0001944
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review E
- Additional Journal Information:
- Journal Volume: 95; Journal Issue: 5; Journal ID: ISSN 2470-0045
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Citation Formats
Michel, D. T., Hu, S. X., Davis, A. K., Glebov, V. Yu., Goncharov, V. N., Igumenshchev, I. V., Radha, P. B., Stoeckl, C., and Froula, D. H. Measurement of the shell decompression in direct-drive inertial-confinement-fusion implosions. United States: N. p., 2017.
Web. doi:10.1103/PhysRevE.95.051202.
Michel, D. T., Hu, S. X., Davis, A. K., Glebov, V. Yu., Goncharov, V. N., Igumenshchev, I. V., Radha, P. B., Stoeckl, C., & Froula, D. H. Measurement of the shell decompression in direct-drive inertial-confinement-fusion implosions. United States. https://doi.org/10.1103/PhysRevE.95.051202
Michel, D. T., Hu, S. X., Davis, A. K., Glebov, V. Yu., Goncharov, V. N., Igumenshchev, I. V., Radha, P. B., Stoeckl, C., and Froula, D. H. Wed .
"Measurement of the shell decompression in direct-drive inertial-confinement-fusion implosions". United States. https://doi.org/10.1103/PhysRevE.95.051202. https://www.osti.gov/servlets/purl/1357236.
@article{osti_1357236,
title = {Measurement of the shell decompression in direct-drive inertial-confinement-fusion implosions},
author = {Michel, D. T. and Hu, S. X. and Davis, A. K. and Glebov, V. Yu. and Goncharov, V. N. and Igumenshchev, I. V. and Radha, P. B. and Stoeckl, C. and Froula, D. H.},
abstractNote = {Measurement of the effect of adiabat (α) on the shell thickness were performed in direct-drive implosions. When reducing the adiabat of the shell from α = 6 to α = 4:5, the shell thickness was measured to decrease from 75 μm to 60 μm, but when decreasing the adiabat further (α = 1:8), the shell thickness was measured to increase to 75 μm. The measured shell thickness, shell trajectories, neutron bang time, and neutron yield were reproduced by two dimensional simulations that include laser imprint, nonlocal thermal transport, cross-beam energy transfer, and first-principles equation-of-state models. The minimum core size was measured to decrease from 40 μm to 30 μm, consistent with the reduction of the adiabat from α = 6 to α = 1:8. Simulations that neglected imprint reproduced the measured core size of the entire adiabat scan, but signi cantly underestimate the shell thickness for adiabat below ~3. These results show that the decompression of the shell measured for low-adiabat implosions was a result of laser imprint.},
doi = {10.1103/PhysRevE.95.051202},
journal = {Physical Review E},
number = 5,
volume = 95,
place = {United States},
year = {Wed May 10 00:00:00 EDT 2017},
month = {Wed May 10 00:00:00 EDT 2017}
}
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