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Title: Beryllium capsule implosions at a case-to-capsule ratio of 3.7 on the National Ignition Facility

Abstract

Beryllium is a candidate ablator material for indirect-drive inertial confinement fusion experiments, motivated by its high mass ablation rate, which is advantageous for implosion coupling efficiency and stabilization of the ablation-front instability growth. In this paper, we present new data on the shock propagation, in-flight shape, and hot spot self-emission shape from gas-filled capsules that demonstrate the feasibility of predictable, symmetric, controllable beryllium implosions at a case-to-capsule ratio of 3.7. The implosions are round (Legendre mode 2 amplitude ≲5%) at an inner beam power and the energy fraction of 26%–28% of the total, indicating that larger beryllium capsules could be driven symmetrically using the National Ignition Facility.

Authors:
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  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  3. General Atomics, San Diego, CA (United States)
  4. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
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) (NA-10; USDOE
OSTI Identifier:
1484649
Alternate Identifier(s):
OSTI ID: 1477816
Report Number(s):
LA-UR-18-24386
Journal ID: ISSN 1070-664X
Grant/Contract Number:  
89233218CNA000001; AC52-06NA52396; AC52-07NA27344; NA0001808
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 25; Journal Issue: 10; Journal ID: ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY

Citation Formats

Zylstra, Alex B., Yi, Sunghwan A., MacLaren, S., Kline, John L., Kyrala, George Amine, Ralph, J.E., Bae, J., Batha, Steven H., Callahan, D., Flippo, Kirk Adler, Huang, H., Hurricane, O., Khan, S.F., Kabadi, N., Kong, C., Kot, Lynn B., Lahmann, B., Loomis, Eric Nicholas, Masse, L.P., Millot, M., Moore, A., Nikroo, A., Perry, Theodore Sonne, Rice, N., Salmonson, J., Shah, R., Sio, H., Stadermann, M., Strozzi, D.J., Tipton, R., and Xu, H. Beryllium capsule implosions at a case-to-capsule ratio of 3.7 on the National Ignition Facility. United States: N. p., 2018. Web. doi:10.1063/1.5041285.
Zylstra, Alex B., Yi, Sunghwan A., MacLaren, S., Kline, John L., Kyrala, George Amine, Ralph, J.E., Bae, J., Batha, Steven H., Callahan, D., Flippo, Kirk Adler, Huang, H., Hurricane, O., Khan, S.F., Kabadi, N., Kong, C., Kot, Lynn B., Lahmann, B., Loomis, Eric Nicholas, Masse, L.P., Millot, M., Moore, A., Nikroo, A., Perry, Theodore Sonne, Rice, N., Salmonson, J., Shah, R., Sio, H., Stadermann, M., Strozzi, D.J., Tipton, R., & Xu, H. Beryllium capsule implosions at a case-to-capsule ratio of 3.7 on the National Ignition Facility. United States. doi:10.1063/1.5041285.
Zylstra, Alex B., Yi, Sunghwan A., MacLaren, S., Kline, John L., Kyrala, George Amine, Ralph, J.E., Bae, J., Batha, Steven H., Callahan, D., Flippo, Kirk Adler, Huang, H., Hurricane, O., Khan, S.F., Kabadi, N., Kong, C., Kot, Lynn B., Lahmann, B., Loomis, Eric Nicholas, Masse, L.P., Millot, M., Moore, A., Nikroo, A., Perry, Theodore Sonne, Rice, N., Salmonson, J., Shah, R., Sio, H., Stadermann, M., Strozzi, D.J., Tipton, R., and Xu, H. Tue . "Beryllium capsule implosions at a case-to-capsule ratio of 3.7 on the National Ignition Facility". United States. doi:10.1063/1.5041285. https://www.osti.gov/servlets/purl/1484649.
@article{osti_1484649,
title = {Beryllium capsule implosions at a case-to-capsule ratio of 3.7 on the National Ignition Facility},
author = {Zylstra, Alex B. and Yi, Sunghwan A. and MacLaren, S. and Kline, John L. and Kyrala, George Amine and Ralph, J.E. and Bae, J. and Batha, Steven H. and Callahan, D. and Flippo, Kirk Adler and Huang, H. and Hurricane, O. and Khan, S.F. and Kabadi, N. and Kong, C. and Kot, Lynn B. and Lahmann, B. and Loomis, Eric Nicholas and Masse, L.P. and Millot, M. and Moore, A. and Nikroo, A. and Perry, Theodore Sonne and Rice, N. and Salmonson, J. and Shah, R. and Sio, H. and Stadermann, M. and Strozzi, D.J. and Tipton, R. and Xu, H.},
abstractNote = {Beryllium is a candidate ablator material for indirect-drive inertial confinement fusion experiments, motivated by its high mass ablation rate, which is advantageous for implosion coupling efficiency and stabilization of the ablation-front instability growth. In this paper, we present new data on the shock propagation, in-flight shape, and hot spot self-emission shape from gas-filled capsules that demonstrate the feasibility of predictable, symmetric, controllable beryllium implosions at a case-to-capsule ratio of 3.7. The implosions are round (Legendre mode 2 amplitude ≲5%) at an inner beam power and the energy fraction of 26%–28% of the total, indicating that larger beryllium capsules could be driven symmetrically using the National Ignition Facility.},
doi = {10.1063/1.5041285},
journal = {Physics of Plasmas},
issn = {1070-664X},
number = 10,
volume = 25,
place = {United States},
year = {2018},
month = {10}
}

Journal Article:
Free Publicly Available Full Text
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Cited by: 7 works
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Figures / Tables:

FIG. 1 FIG. 1: CCR=3.7 beryllium target design. Center: hohlraum dimensions and target geometry, left: laser intensity on the hohlraum wall, right: capsule dimensions.

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