Bulletin of the American Physical Society
63rd Annual Meeting of the APS Division of Plasma Physics
Volume 66, Number 13
Monday–Friday, November 8–12, 2021; Pittsburgh, PA
Session NP11: Poster Session V:
HED
ICF
MFE- Turbulence & Transport
9:30 AM - 12:30 PM
Wednesday, November 10, 2021
Room: Hall A
Abstract: NP11.00109 : An Analysis of RT Instability in Stagnated Magnetized Plasmas *
Presenter:
Stefano Merlini
(Imperial College London)
Authors:
Stefano Merlini
(Imperial College London)
Jack D Hare
(Massachusetts Institute of Technology MI)
Guy C Burdiak
(First Light Fusion ltd)
Jack W Halliday
(Imperial College London)
Lee G Suttle
(Imperial College London)
Danny R Russell
(Imperial College London)
Vicente Valenzuela-Villaseca
(Imperial College London)
Jeremy P Chittenden
(Imperial College London)
Andrea Ciardi
(Sorbonne University)
Thomas Varnish
(Imperial College London)
Katherine Marrow
(Imperial College London)
Mark E Koepke
(West Virginia University)
Sergey V Lebedev
(Imperial College London)
In the case of Aluminium, we observe a well-defined stand-off shock at ∼ 3 mm from the planar wall due to the pile-up of the advected magnetic field, and the development of small-scale instabilities at the stagnated plasma. No presence of stand-off shock is instead observed in Tungsten flows, where the decelerated plasma is mainly dominated by strong density perturbations with k-vector parallel to [V x B] direction, extending for ∼ 5 mm from the obstacle in both the stagnation layer and the magnetic field pile-up region.
Preliminary analysis of the experimental data suggests that the Magnetic Rayleigh-Taylor instability in radiatively cooled plasmas is responsible for the observed structure of the stagnation layer.
*This work was supported in part by the U.S. Department of Energy (DOE) Awards No. DE-F03-02NA00057 and No. DE-SC-0001063
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