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Effect of bromine-dopant on radiation-driven Rayleigh–Taylor instability in plastic foil
- Source :
- Plasma Physics and Controlled Fusion. 59:105012
- Publication Year :
- 2017
- Publisher :
- IOP Publishing, 2017.
-
Abstract
- Effects of bromine (Br) dopant on the growth of radiation-driven ablative Rayleigh–Taylor instability (RTI) in plastic foils are studied by radiation hydrodynamics simulations and theoretical analysis. It is found that the Br-dopant in plastic foil reduces the seed of ablative RTI. The main reasons of the reduction are attributed to the smaller oscillation amplitude of ablative Richtmyer–Meshkov instability (RMI) induced by the smaller post-shock sound speed, and the smaller oscillation frequency of ablative RMI induced by the smaller ablation velocity and blow-off plasma velocity. The Br-dopant also decreases the linear growth rate of ablative RTI due to the smaller acceleration. Treating the perturbation growth as a function of foil's displacement, the perturbation growth would increase in Br-doped foil at the phase of ablative RTI, which is attributed to the decrease of the ablation velocity and the density gradient scale length. The results are helpful for further understanding the influence of high-Z dopant on the radiation-driven ablative RTI.
- Subjects :
- Materials science
Dopant
Plasma
Radiation
Condensed Matter Physics
01 natural sciences
Molecular physics
Instability
010305 fluids & plasmas
Nuclear Energy and Engineering
Speed of sound
0103 physical sciences
Ablative case
Rayleigh–Taylor instability
010306 general physics
human activities
FOIL method
Subjects
Details
- ISSN :
- 13616587 and 07413335
- Volume :
- 59
- Database :
- OpenAIRE
- Journal :
- Plasma Physics and Controlled Fusion
- Accession number :
- edsair.doi...........f595339573586692163bd6ce44f97656