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Proof-of-Principle Experiment on the Dynamic Shell Formation Concept on the OMEGA Laser

ORAL

Abstract

A dynamic shell implosion concept in direct-drive inertial confinement fusion utilizes

a spherical pellet of liquid DT, which is first compressed by convergent shocks,

then expands after bouncing these shocks from the center, decelerates and forms a shell

with the help of following subsequent converged shocks, and finally, implodes resulting

in conventional central hot-spot ignition [V. N. Goncharov et al., Phys. Rev. Lett. 125,

065001 (2020)]. Proof-of-principle experiments on the OMEGA laser were proposed to

demonstrate, for the first time, the feasibility of dynamic formation of a dense shell

in a spherically expanding cloud of plasma. This shell is formed by convergent shocks

launched at the edge of the cloud, with the cloud itself formed as a result of compression

and relaxation of a plastic-foam ball target. The results of experiments are expected

to be reported and compared with 2-D and 3-D radiation-hydrodynamic simulations.

These simulations predict good stability of the dynamic shells considered to low-mode

asymmetries induced by laser-illumination nonuniformities, target offset, and stalk mount.

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Presenters

  • Igor V Igumenshchev

    Lab for Laser Energetics, University of Rochester, Laboratory for Laser Energetics, University of Rochester

Authors

  • Igor V Igumenshchev

    Lab for Laser Energetics, University of Rochester, Laboratory for Laser Energetics, University of Rochester

  • Wolfgang R Theobald

    University of Rochester, Laboratory for Laser Energetics, University of Rochester, Laboratory for Laser Energetics, U. of Rochester

  • Mark J Bonino

    Laboratory for Laser Energetics, LLE, University of Rochester, Laboratory for Laser Energetics, University of Rochester

  • Mike M Campbell

    Laboratory for Laser Energetics, University of Rochester, Laboratory for Laser Energetics of the University of Rochester, LLE, Laboratory for Laser Energetics, University of Rochester

  • Timothy J Collins

    University of Rochester, Laboratory for Laser Energetics, University of Rochester

  • Sarah Fess

    University of Rochester, LLE

  • Valeri N Goncharov

    University of Rochester, Laboratory for Laser Energetics, University of Rochester

  • David R Harding

    University of Rochester, University of Rochester Laboratory for Laser Energetics, Laboratory for Laser Energetics, Laboratory for Laser Energetics, U. of Rochester, LLE, Laboratory for Laser Energetics, University of Rochester

  • Nathaniel R Shaffer

    Lab for Laser Energetics, Lab. for Laser Energetics, U. of Rochester, Laboratory for Laser Energetics, University of Rochester

  • William T Trickey

    Laboratory for Laser Energetics, University of Rochester

  • Siddharth Sampat

    Laboratory for Laser Energetics, LLE, University of Rochester, Laboratory for Laser Energetics, University of Rochester

  • Rahul C Shah

    Laboratory for Laser Energetics - Rochester, Laboratory for Laser Energetics, U. of Rochester, University of Rochester, Laboratory for Laser Energetics, University of Rochester

  • Alexander Shvydky

    Lab for Laser Energetics, Laboratory for Laser Energetics, University of Rochester

  • Christian Stoeckl

    University of Rochester, Laboratory for Laser Energetics, U. of Rochester, Laboratory for Laser Energetics, University of Rochester

  • Leon Waxer

    LLE, Laboratory for Laser Energetics, University of Rochester

  • Arnaud Colaitis

    CELIA

  • Romain Loitard

    CELIA

  • Stefano Atzeni

    Univ of Rome La Sapienza

  • Francesco Barbato

    Universita di Roma, Univ of Rome La Sapienza, Univ of Roma La Sapienza

  • Lorenzo Savino

    Univ of Rome La Sapienza, Univ of Roma La Sapienza

  • Noel Alfonso

    General Atomics

  • Alex Haid

    General Atomics