Enhancement of Ablative Rayleigh-Taylor Instability Growth by Thermal Conduction Suppression in a Magnetic Field
- 12 October 2021
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 127 (16), 165001
- https://doi.org/10.1103/physrevlett.127.165001
Abstract
Ablative Rayleigh-Taylor instability growth was investigated to elucidate the fundamental physics of thermal conduction suppression in a magnetic field. Experiments found that unstable modulation growth is faster in an external magnetic field. This result was reproduced by a magnetohydrodynamic simulation based on a Braginskii model of electron thermal transport. An external magnetic field reduces the electron thermal conduction across the magnetic field lines because the Larmor radius of the thermal electrons in the field is much shorter than the temperature scale length. Thermal conduction suppression leads to spatially nonuniform pressure and reduced thermal ablative stabilization, which in turn increases the growth of ablative Rayleigh-Taylor instability.Funding Information
- Osaka University
- Nagoya University
- National Institute for Fusion Science
- Ministry of Education, Culture, Sports, Science and Technology (24684044, 25630419, 26287147, 15K17798, 15K21767, 15KK0163, 16K13918, 16H02245, 17K05728)
- Japan Society for the Promotion of Science (14J06592, 15J00850, 15J00902, 15J02622, 17J07212, 18J01627, 18J11119, 18J11354)
- Matsuo Foundation for Science Promotion
- Research Foundation for Opto-Science and Technology
- High Performance Computing Infrastructure (hp180093)
This publication has 30 references indexed in Scilit:
- Kilotesla Magnetic Field due to a Capacitor-Coil Target Driven by High Power LaserScientific Reports, 2013
- Mechanism for magnetic field generation and growth in Rayleigh-Taylor unstable inertial confinement fusion plasmasPhysics of Plasmas, 2012
- Systematic study of Rayleigh–Taylor growth in directly driven plastic targets in a laser-intensity range from ∼2×1014to∼1.5×1015W∕cm2Physics of Plasmas, 2008
- Comprehensive Diagnosis of Growth Rates of the Ablative Rayleigh-Taylor InstabilityPhysical Review Letters, 2007
- Experimental astrophysics with high power lasers andpinchesReviews of Modern Physics, 2006
- Filamentary structure on the Sun from the magnetic Rayleigh–Taylor instabilityNature, 2005
- Ablative Rayleigh-Taylor Instability at Short Wavelengths Observed with Moiré InterferometryPhysical Review Letters, 2002
- Growth rates of the ablative Rayleigh–Taylor instability in inertial confinement fusionPhysics of Plasmas, 1998
- Measurement of a Dispersion Curve for Linear-Regime Rayleigh-Taylor Growth Rates in Laser-Driven Planar TargetsPhysical Review Letters, 1997
- Rayleigh-Taylor Instability and Laser-Pellet FusionPhysical Review Letters, 1974