Convergent Ablation Front Instability Experiments on Nova

Details Convergent Ablation Front Instability Experiments on Nova Convergent Ablation Front Instability Experiments on Nova

Nov 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998aps..dpp.r8q12r&link_type=abstract

American Physical Society, Division of Plasma Physics Meeting, November 16-20, 1998 New Orleans, LA, abstract #R8Q.12

Physics

Plasma Physics

Scientific paper

We have carried out a new set of experiments on the ablation front RT instability in spherically convergent geometry on the Nova facility. We have modified the experimental configuration compared to previous one(C. Cherfils et al. p116 ; S.G. Glendinning et al. p173 ; 6th IWPCTM, Marseille, France, June 1997) so as to allow the study of the convergence effect on the growth of the perturbations with a higher convergence ratio ~ ~3-4. We have used standard Nova cylindrical "scale 1.5" hohlraums. The samples were 1 mm diameter, 42 μm thick, CH(1.2%Ge) capsules with no fill pressure. The perturbations were pure Legendre mode. The growth of the instability was observed by face-on radiography of the samples. We used eight laser beams for the drive in a 4.5 ns in duration 7:1 contrast pulse shape. The radiation drive was measured, with a ~ ~ 130 eV peak.

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