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BibTex format

@article{Russell:2023:10.1017/S0022377823000740,
author = {Russell, DR and Burdiak, GC and Carroll-Nellenback, JJ and Halliday, JWD and Hare, JD and Merlini, S and Suttle, LG and Valenzuela-Villaseca, V and Eardley, SJ and Fullalove, JA and Rowland, GC and Smith, RA and Frank, A and Hartigan, P and Velikovich, AL and Chittenden, JP and Lebedev, SV},
doi = {10.1017/S0022377823000740},
journal = {Journal of Plasma Physics},
title = {Observation of subcritical shocks in a collisional laboratory plasma: scale dependence near the resistive length},
url = {http://dx.doi.org/10.1017/S0022377823000740},
volume = {89},
year = {2023}
}
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TY  - JOUR
AB  - We present a study of subcritical shocks in a highly collisional laboratory plasma with a dynamically significant magnetic field. Shocks were produced by placing cylindrical obstacles into the supermagnetosonic ( MMS∼1.9 ) outflow from an inverse wire array z-pinch at the MAGPIE pulsed power facility ( ne∼8.5×1017cm−3 ,  v∼45kms−1 ). We demonstrate the existence of subcritical shocks in this regime and find that secondary stagnation shocks form in the downstream which we infer from interferometry and optical Thomson scattering measurements are hydrodynamic in nature. The subcritical shock width is found to be approximately equal to the resistive diffusion length and we demonstrate the absence of a jump in hydrodynamic parameters. Temperature measurements by collective optical Thomson scattering showed little temperature change across the subcritical shock ( <10%  of the ion kinetic energy) which is consistent with a balance between adiabatic and Ohmic heating and radiative cooling. We demonstrate the absence of subcritical shocks when the obstacle diameter is less than the resistive diffusion length due to decoupling of the magnetic field from the plasma. These findings are supported by magnetohydrodynamic simulations using the Gorgon and AstroBEAR codes and discrepancies between the simulations and experiment are discussed.
AU  - Russell,DR
AU  - Burdiak,GC
AU  - Carroll-Nellenback,JJ
AU  - Halliday,JWD
AU  - Hare,JD
AU  - Merlini,S
AU  - Suttle,LG
AU  - Valenzuela-Villaseca,V
AU  - Eardley,SJ
AU  - Fullalove,JA
AU  - Rowland,GC
AU  - Smith,RA
AU  - Frank,A
AU  - Hartigan,P
AU  - Velikovich,AL
AU  - Chittenden,JP
AU  - Lebedev,SV
DO  - 10.1017/S0022377823000740
PY  - 2023///
SN  - 0022-3778
TI  - Observation of subcritical shocks in a collisional laboratory plasma: scale dependence near the resistive length
T2  - Journal of Plasma Physics
UR  - http://dx.doi.org/10.1017/S0022377823000740
UR  - https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:001045059500001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=a2bf6146997ec60c407a63945d4e92bb
UR  - https://www.cambridge.org/core/journals/journal-of-plasma-physics/article/abs/observation-of-subcritical-shocks-in-a-collisional-laboratory-plasma-scale-dependence-near-the-resistive-length/D0EA043328923A504D18D5DF9B5AD7A6
VL  - 89
ER  -
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