Pump-depletion dynamics and saturation of stimulated Brillouin scattering in shock ignition relevant experiments.

Journal

Physical review. E
ISSN: 2470-0053
Titre abrégé: Phys Rev E
Pays: United States
ID NLM: 101676019

Informations de publication

Date de publication:
Jun 2021
Historique:
received: 05 09 2019
accepted: 19 05 2021
entrez: 17 7 2021
pubmed: 18 7 2021
medline: 18 7 2021
Statut: ppublish

Résumé

As an alternative inertial confinement fusion scheme, shock ignition requires a strong converging shock driven by a high-intensity laser pulse to ignite a precompressed fusion capsule. Understanding nonlinear laser-plasma instabilities is crucial to assess and improve the laser-shock energy coupling. Recent experiments conducted on the OMEGA EP laser facility have demonstrated that such instabilities can ∼100% deplete the first 0.5 ns of the high-intensity laser. Analyses of the observed laser-generated blast wave suggest that this pump-depletion starts at ∼0.02 critical density and progresses to 0.1-0.2 critical density, which is also confirmed by the time-resolved stimulated Raman backscattering spectra. The pump-depletion dynamics can be explained by the breaking of ion-acoustic waves in stimulated Brillouin scattering. Such pump depletion would inhibit the collisional laser energy absorption but may benefit the generation of hot electrons with moderate temperatures for electron shock ignition [Phys. Rev. Lett. 119, 195001 (2017)PRLTAO0031-900710.1103/PhysRevLett.119.195001].

Identifiants

DOI: 10.1103/PhysRevE.103.063208 PMID: 34271736
pubmed: 34271736
doi: 10.1103/PhysRevE.103.063208
doi:

Types de publication

Journal Article

Langues

eng

Sous-ensembles de citation

IM

Pagination

063208

Auteurs

S Zhang (S)

Department of Mechanical and Aerospace Engineering, University of California San Diego, La Jolla, California 92093, USA.

J Li (J)

Department of Mechanical and Aerospace Engineering, University of California San Diego, La Jolla, California 92093, USA.

C M Krauland (CM)

Inertial Fusion Technology, General Atomics, San Diego, California 92121, USA.

F N Beg (FN)

Department of Mechanical and Aerospace Engineering, University of California San Diego, La Jolla, California 92093, USA.

S Muller (S)

Inertial Fusion Technology, General Atomics, San Diego, California 92121, USA.

W Theobald (W)

Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623, USA.

J Palastro (J)

Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623, USA.

T Filkins (T)

Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623, USA.

D Turnbull (D)

Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623, USA.

D Haberberger (D)

Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623, USA.

C Ren (C)

Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623, USA.
Department of Mechanical Engineering, University of Rochester, Rochester, New York 14623, USA.

R Betti (R)

Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623, USA.
Department of Mechanical Engineering, University of Rochester, Rochester, New York 14623, USA.

C Stoeckl (C)

Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623, USA.

E M Campbell (EM)

Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623, USA.

J Trela (J)

Centre Lasers Intenses et Applications, CELIA, Université de Bordeaux CEA-CNRS, 33405 Talence, France.

D Batani (D)

Centre Lasers Intenses et Applications, CELIA, Université de Bordeaux CEA-CNRS, 33405 Talence, France.

R H H Scott (RHH)

Central Laser Facility, STFC Rutherford Appleton Laboratory, Harwell Oxford, Didcot OX11 0QX, United Kingdom.

M S Wei (MS)

Inertial Fusion Technology, General Atomics, San Diego, California 92121, USA.
Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623, USA.

Classifications MeSH