The control of hot-electron preheat in shock-ignition implosions

Trela, J.; Theobald, W.; Anderson, K. S.; Batani, D.; Betti, R.; Casner, A.; Delettrez, J. A.; Frenje, J. A.; Glebov, V. Yu.; Ribeyre, X.; Solodov, A. A.; Stoeckl, M.; Stoeckl, C.

doi:10.1063/1.5020981

Title: The control of hot-electron preheat in shock-ignition implosions

Journal Article · 22 May 2018 · Physics of Plasmas

DOI: https://doi.org/10.1063/1.5020981 · OSTI ID:1457359

Trela, J. ^[1]; Theobald, W. ^[2]; Anderson, K. S. ^[2]; Batani, D. ^[3]; Betti, R. ^[4];

^[3];

^[2];

^[5]; Glebov, V. Yu. ^[2];

^[3]; Solodov, A. A. ^[2]; Stoeckl, M. ^[2]; Stoeckl, C. ^[2]

Univ. de Bordeaux (France). Centre Lasers Intenses et Applications, CELIA; Univ. of Rochester, Rochester, NY (United States). Lab. for Laser Energetics
Univ. of Rochester, Rochester, NY (United States). Lab. for Laser Energetics
Univ. de Bordeaux (France). Centre Lasers Intenses et Applications, CELIA
Univ. of Rochester, Rochester, NY (United States). Lab. for Laser Energetics; Univ. of Rochester, Rochester, NY (United States). Dept. of Physics and Astronomy; Univ. of Rochester, Rochester, NY (United States). Dept. of Mechanical Engineering
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)

In the shock-ignition scheme for inertial confinement fusion, hot electrons resulting from laser–plasma instabilities can play a major role during the late stage of the implosion. This article presents the results of an experiment performed on OMEGA in the so-called “40 + 20 configuration.” Using a recent calibration of the time-resolved hard x-ray diagnostic, the hot electrons’ temperature and total energy were measured. One-dimensional radiation–hydrodynamic simulations have been performed that include hot electrons and are in agreement with the measured neutron-rate–averaged areal density. For an early spike launch, both experiment and simulations show the detrimental effect of hot electrons on areal density and neutron yield. Lastly, for a later spike launch, this effect is minimized because of a higher compression of the target.

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Research Organization:: Univ. of Rochester, NY (United States). Lab. for Laser Energetics

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: NA0001944

OSTI ID:: 1457359

Alternate ID(s):: OSTI ID: 1438280

Journal Information:: Physics of Plasmas, Vol. 25, Issue 5; ISSN 1070-664X

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 20 works

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