Direct Measurements of DT Fuel Preheat from Hot Electrons in Direct-Drive Inertial Confinement Fusion.

Christopherson, A R; Betti, R; Forrest, C J; Howard, J; Theobald, W; Delettrez, J A; Rosenberg, M J; Solodov, A A; Stoeckl, C; Patel, D; Gopalaswamy, V; Cao, D; Peebles, J L; Edgell, D H; Seka, W; Epstein, R; Wei, M S; Gatu Johnson, M; Simpson, R; Regan, S P; Campbell, E M

Christopherson, A R; Betti, R; Forrest, C J; Howard, J; Theobald, W; Delettrez, J A; Rosenberg, M J; Solodov, A A; Stoeckl, C; Patel, D; Gopalaswamy, V; Cao, D; Peebles, J L; Edgell, D H; Seka, W; Epstein, R; Wei, M S; Gatu Johnson, M; Simpson, R; Regan, S P; Campbell, E M.

Afiliación

Christopherson AR; Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA.
Betti R; Department of Mechanical Engineering, University of Rochester, Rochester, New York 14623, USA.
Forrest CJ; Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA.
Howard J; Department of Mechanical Engineering, University of Rochester, Rochester, New York 14623, USA.
Theobald W; Department of Physics and Astronomy, University of Rochester, Rochester, New York 14623, USA.
Delettrez JA; Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA.
Rosenberg MJ; Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA.
Solodov AA; Department of Mechanical Engineering, University of Rochester, Rochester, New York 14623, USA.
Stoeckl C; Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA.
Patel D; Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA.
Gopalaswamy V; Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA.
Cao D; Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA.
Peebles JL; Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA.
Edgell DH; Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA.
Seka W; Department of Mechanical Engineering, University of Rochester, Rochester, New York 14623, USA.
Epstein R; Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA.
Wei MS; Department of Mechanical Engineering, University of Rochester, Rochester, New York 14623, USA.
Gatu Johnson M; Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA.
Simpson R; Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA.
Regan SP; Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA.
Campbell EM; Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA.

Phys Rev Lett ; 127(5): 055001, 2021 Jul 30.

Article en En | MEDLINE | ID: mdl-34397224

ABSTRACT

ABSTRACT

Hot electrons generated by laser-plasma instabilities degrade the performance of laser-fusion implosions by preheating the DT fuel and reducing core compression. The hot-electron energy deposition in the DT fuel has been directly measured for the first time by comparing the hard x-ray signals between DT-layered and mass-equivalent ablator-only implosions. The electron energy deposition profile in the fuel is inferred through dedicated experiments using Cu-doped payloads of varying thickness. The measured preheat energy accurately explains the areal-density degradation observed in many OMEGA implosions. This technique can be used to assess the viability of the direct-drive approach to laser fusion with respect to the scaling of hot-electron preheat with laser energy.

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Texto completo: 1 Colección: 01-internacional Banco de datos: MEDLINE Idioma: En Revista: Phys Rev Lett Año: 2021 Tipo del documento: Article País de afiliación: Estados Unidos

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