Direct Measurement of X-Ray Drive from Surrogate Targets in Nova Hohlraums

Details Direct Measurement of X-Ray Drive from Surrogate Targets in Nova Hohlraums Direct Measurement of X-Ray Drive from Surrogate Targets in Nova Hohlraums

Oct 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996phrvl..77.3815a&link_type=abstract

Physical Review Letters, Volume 77, Issue 18, October 28, 1996, pp.3815-3818

Physics

11

Scientific paper

A new method for measuring x-ray drive in Nova hohlraums near target center using surrogate targets is proposed as an alternative to conventional wall-based techniques. A solid, low-density ( 0.3 g/cm3) SiO2 aerogel ball placed at the center of a Nova hohlraum is used to infer x-ray drive from the backlighter-imaged ablatively driven shock trajectory. A nearly 10% (40%) increase in peak radiation temperature (flux) near the hohlraum center in the presence of axial shields is predicted from radiation-hydrodynamics simulations and corroborated by experiment.

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