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Design of Cylindrical Implosion Experiments to Demonstrate Scale-Invariant Rayleigh-Taylor Instability Growth
High Energy Density Physics ( IF 1.192 ) Pub Date : 2020-05-21 , DOI: 10.1016/j.hedp.2020.100831
J.P. Sauppe; S. Palaniyappan; J.L. Kline; K.A. Flippo; O.L. Landen; D. Shvarts; S.H. Batha; P.A. Bradley; E.N. Loomis; B.J. Tobias; N.N. Vazirani; C.F. Kawaguchi; L. Kot; D.W. Schmidt; T.H. Day; A.B. Zylstra; E. Malka

Radiation-hydrodynamics simulations are used to design laser-driven cylindrical implosion experiments to directly measure hydrodynamic instability growth in convergent geometry. Designs for two different size targets, varying in radial dimension by a factor of three, are presented. A set of beam pointings and powers are identified for each scale design that result in a nearly axially uniform implosion of an embedded marker layer. The implosion trajectories are shown to be scale-invariant between designs, with nearly identical scaled acceleration profiles. Linear theory and radiation-hydrodynamics simulations predict that Rayleigh-Taylor instability growth of an azimuthal perturbation, machined on the inner surface of the embedded marker, is also scale-invariant between designs.
更新日期:2020-05-21

 

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