BibTex format
@article{Merlini:2023:10.1063/5.0160809,
author = {Merlini, S and Hare, JD and Burdiak, GC and Halliday, JWD and Ciardi, A and Chittenden, JP and Clayson, T and Crilly, AJ and Eardley, SJ and Marrow, KE and Russell, DR and Smith, RA and Stuart, N and Suttle, LG and Tubman, ER and Valenzuela-Villaseca, V and Varnish, TWO and Lebedev, SV},
doi = {10.1063/5.0160809},
journal = {Physics of Plasmas},
title = {Radiative cooling effects on reverse shocks formed by magnetized supersonic plasma flows},
url = {http://dx.doi.org/10.1063/5.0160809},
volume = {30},
year = {2023}
}
RIS format (EndNote, RefMan)
TY - JOUR
AB - We study the structure of reverse shocks formed by the collision of supersonic, magnetized plasma flows driven by an inverse (or exploding) wire array with a planar conducting obstacle. We observe that the structure of these reverse shocks varies dramatically with wire material, despite the similar upstream flow velocities and mass densities. For aluminum wire arrays, the shock is sharp and well-defined, consistent with magneto-hydrodynamic theory. In contrast, we do not observe a well-defined shock using tungsten wires, and instead we see a broad region dominated by density fluctuations on a wide range of spatial scales. We diagnose these two very different interactions using interferometry, Thomson scattering, shadowgraphy, and a newly developed imaging refractometer that is sensitive to small deflections of the probing laser corresponding to small-scale density perturbations. We conclude that the differences in shock structure are most likely due to radiative cooling instabilities, which create small-scale density perturbations elongated along magnetic field lines in the tungsten plasma. These instabilities grow more slowly and are smoothed by thermal conduction in the aluminum plasma.
AU - Merlini,S
AU - Hare,JD
AU - Burdiak,GC
AU - Halliday,JWD
AU - Ciardi,A
AU - Chittenden,JP
AU - Clayson,T
AU - Crilly,AJ
AU - Eardley,SJ
AU - Marrow,KE
AU - Russell,DR
AU - Smith,RA
AU - Stuart,N
AU - Suttle,LG
AU - Tubman,ER
AU - Valenzuela-Villaseca,V
AU - Varnish,TWO
AU - Lebedev,SV
DO - 10.1063/5.0160809
PY - 2023///
SN - 1070-664X
TI - Radiative cooling effects on reverse shocks formed by magnetized supersonic plasma flows
T2 - Physics of Plasmas
UR - http://dx.doi.org/10.1063/5.0160809
VL - 30
ER -