Hydrodynamic instabilities and generation of ultra-high magnetic fields in a deflagration wave of laser ablation


Project leader


Funding source

Swedish Research Council - Vetenskapsrådet (VR)


Project Details

Start date: 01/07/2014
End date: 30/06/2017
Funding: 3150000 SEK


Description

The aim of this project is to investigate hydrodynamic instabilities in deflagration wave of laser ablation focusing on generation of ultra-high magnetic fields. Hydrodynamic instabilities play a crucial role in the inertial confinement fusion limiting its performance and efficiency. Numerous theoretical and experimental works studied the laser ablation instabilities; yet, the role of the magnetic field in the instabilities is poorly understood up to now because of the extreme complexity of the problem. At the same time, recent experiments detected generated magnetic fields up to Mega-Gauss which triggered active research in the area. Such ultra-high magnetic fields are believed to originate from the hydrodynamic instabilities and expected to produce a decisive impact on the plasma dynamics. In this project we will study the most powerful instabilities of the laser ablation flow ? the Rayleigh-Taylor, Kelvin-Helmholtz and Darrieus-Landau instabilities taking into account deflagration properties of the ablation flow. The study will combine development of theoretical models and extensive numerical simulations of the magnetohydrodynamic equations using the Pencil-code. In the project we will take into account the key properties of laser ablation plasmas such as steep density gradients, wide range of the plasma velocity from strongly subsonic up to sonic values, strong temperature dependence of thermal and electric conductivity in plasma, and others.


Last updated on 2017-31-07 at 13:21