One of the main design objectives for Inertial Confinement Fusion is the specification of surface roughness: surface perturbation triggers ablative instabilities that can cause shell rupture and/or hot-cold fuel mixing preventing the target from igniting. Understanding, controlling and measuring instabilities evolution is fundamental in order to design robust and efficient targets. The present work focuses on the ablative Rayleigh-Taylor instability (a-RTI); the a-RTI dispersion relation for high modes for a CH-DT-target [1] is presented and compared with a-RTI dispersion relation for an all-DT target [2]. The Ablative region and the Blow-off region are characterized via lagrangian line envelope graphs and isodensity line envelope graphs.

Ablative Richtmyer-Meshkov and Rayleigh-Taylor instabilities in direct-drive laser fusion and growth reduction by adiabat shaping / Marocchino, Alberto; Atzeni, Stefano; Schiavi, Angelo. - ELETTRONICO. - 35 1:(2011), pp. 193-196. ((Intervento presentato al convegno 38th EPS Conference on Plasma Physics 2011, EPS 2011 tenutosi a Strasbourg; France nel 27 June 2011 through 1 July 2011.

Ablative Richtmyer-Meshkov and Rayleigh-Taylor instabilities in direct-drive laser fusion and growth reduction by adiabat shaping

MAROCCHINO, ALBERTO;ATZENI, Stefano;SCHIAVI, ANGELO
2011

Abstract

One of the main design objectives for Inertial Confinement Fusion is the specification of surface roughness: surface perturbation triggers ablative instabilities that can cause shell rupture and/or hot-cold fuel mixing preventing the target from igniting. Understanding, controlling and measuring instabilities evolution is fundamental in order to design robust and efficient targets. The present work focuses on the ablative Rayleigh-Taylor instability (a-RTI); the a-RTI dispersion relation for high modes for a CH-DT-target [1] is presented and compared with a-RTI dispersion relation for an all-DT target [2]. The Ablative region and the Blow-off region are characterized via lagrangian line envelope graphs and isodensity line envelope graphs.
38th EPS Conference on Plasma Physics 2011, EPS 2011
Blow-off region; Design objectives; Direct drive; Dispersion relations; Fuel mixing; Growth reduction; High modes; Isodensity; Lagrangian; Rayleigh-Taylor instabilities; Richtmyer-Meshkov; Surface perturbations
04 Pubblicazione in atti di convegno::04b Atto di convegno in volume
Ablative Richtmyer-Meshkov and Rayleigh-Taylor instabilities in direct-drive laser fusion and growth reduction by adiabat shaping / Marocchino, Alberto; Atzeni, Stefano; Schiavi, Angelo. - ELETTRONICO. - 35 1:(2011), pp. 193-196. ((Intervento presentato al convegno 38th EPS Conference on Plasma Physics 2011, EPS 2011 tenutosi a Strasbourg; France nel 27 June 2011 through 1 July 2011.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/394724
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