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Oct 13 – 18, 2014
Hotel Park Inn Pribaltiyskaya
Europe/Moscow timezone

High Compression of Matter by Hyperspherical Shock Waves for Application to Impact Ignition

Oct 16, 2014, 2:00 PM
4h 45m
Green 8-9 (Hotel Park Inn Pribaltiyskaya)

Green 8-9

Hotel Park Inn Pribaltiyskaya

Saint Petersburg, Russian Federation
Poster Poster 6


Prof. Masakatsu Murakami (Institute of Laser Engineering, Osaka University)


To achieve substantially high compression performance of the impact ignition, a novel compression scheme is proposed, in which hollow targets with specifically curved structures initially filled with uniform matter, are driven by converging shock waves. (i) Its self-similar dynamics is analyzed in detail. (ii) The dynamic behavior is demonstrated using two-dimensional hydrodynamic simulations. (iii) A rigorous linear perturbation analysis is proposed, which gives a new dispersion relation with cut-off mode numbers as a function of the specific heat ratio, above which eigenmode perturbations are smeared out in the converging phase. This study provides (1) a new scheme achieving super-high compression via strong shock with the special geometries as another path to achieve high pressures via orthodox adiabatic compression, and (2) a rigorous perturbation analysis to give the new growth rates that are significantly different from the widely accepted prediction. These new knowledge is expected to be applied to “Impact Ignition” – an advanced scheme of ICF, in terms of the reshaped cone casing that works as igniter.
Country or International Organisation Japan
Paper Number IFE/P6-7

Primary author

Prof. Masakatsu Murakami (Institute of Laser Engineering, Osaka University)


Dr Javier Sanz (ETSI Aeronauticos, Universidad Politecnica de Madrid)

Presentation materials

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