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Title: Generating keV ion distributions for nuclear reactions at near solid-density using intense short-pulse lasers

Abstract

Our understanding of a large range of astrophysical phenomena depends on a precise knowledge of charged particle nuclear reactions that occur at very low rates, which are difficult to measure under relevant plasma conditions. Here, we describe a method for generating dense plasmas at effective ion temperatures >20 keV, sufficient to induce measurable charged particle nuclear reactions. Our approach uses ultra-intense lasers to drive micron-sized, encapsulated nanofoam targets. Energetic electrons generated in the intense laser interaction pass through the foam, inducing a rapid expansion of the foam ions; this results in a hot, near-solid density plasma. We present the laser and target conditions necessary to achieve these conditions and illustrate the system performance using three-dimensional particle-in-cell simulations, outline potential applications and calculate expected nuclear reaction rates in the D(d,n) and 12C(p,$γ$) systems assuming CD, or CH aerogel foams.

Authors:
 [1];  [1];  [1]; ORCiD logo [1]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Fusion Energy Sciences (FES)
OSTI Identifier:
1580680
Report Number(s):
LLNL-JRNL-753473
Journal ID: ISSN 2041-1723; 939839; TRN: US2101993
Grant/Contract Number:  
AC52-07NA27344
Resource Type:
Accepted Manuscript
Journal Name:
Nature Communications
Additional Journal Information:
Journal Volume: 10; Journal Issue: 1; Journal ID: ISSN 2041-1723
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY

Citation Formats

Kemp, A. J., Wilks, S. C., Hartouni, E. P., and Grim, G. Generating keV ion distributions for nuclear reactions at near solid-density using intense short-pulse lasers. United States: N. p., 2019. Web. https://doi.org/10.1038/s41467-019-12076-x.
Kemp, A. J., Wilks, S. C., Hartouni, E. P., & Grim, G. Generating keV ion distributions for nuclear reactions at near solid-density using intense short-pulse lasers. United States. https://doi.org/10.1038/s41467-019-12076-x
Kemp, A. J., Wilks, S. C., Hartouni, E. P., and Grim, G. Fri . "Generating keV ion distributions for nuclear reactions at near solid-density using intense short-pulse lasers". United States. https://doi.org/10.1038/s41467-019-12076-x. https://www.osti.gov/servlets/purl/1580680.
@article{osti_1580680,
title = {Generating keV ion distributions for nuclear reactions at near solid-density using intense short-pulse lasers},
author = {Kemp, A. J. and Wilks, S. C. and Hartouni, E. P. and Grim, G.},
abstractNote = {Our understanding of a large range of astrophysical phenomena depends on a precise knowledge of charged particle nuclear reactions that occur at very low rates, which are difficult to measure under relevant plasma conditions. Here, we describe a method for generating dense plasmas at effective ion temperatures >20 keV, sufficient to induce measurable charged particle nuclear reactions. Our approach uses ultra-intense lasers to drive micron-sized, encapsulated nanofoam targets. Energetic electrons generated in the intense laser interaction pass through the foam, inducing a rapid expansion of the foam ions; this results in a hot, near-solid density plasma. We present the laser and target conditions necessary to achieve these conditions and illustrate the system performance using three-dimensional particle-in-cell simulations, outline potential applications and calculate expected nuclear reaction rates in the D(d,n) and 12C(p,$γ$) systems assuming CD, or CH aerogel foams.},
doi = {10.1038/s41467-019-12076-x},
journal = {Nature Communications},
number = 1,
volume = 10,
place = {United States},
year = {2019},
month = {9}
}

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