PHYSICS OF PLASMAS 22,
100703 (2015)
Sheath energy transmission in a collisional plasma with
collisionless sheath
Xian-Zhu Tang a)
and Zehua Guo b)
Theoretical Division, Los Alamos National
Laboratory, Los Alamos, New Mexico 87545, USA
(Received 4 May 2015; accepted 7 October 2015;
published online 16 October 2015)
Abstract
Sheath energy transmission governs the plasma
energy exhaust onto a material surface. The ion channel is dominated by convection, but the
electron channel has a significant thermal conduction component, which is dominated by the Knudsen
layer effect in the presence of an absorbing wall. First-principle kinetic simulations reveal a
robustly supersonic sheath entry flow. The ion sheath energy transmission and the sheath potential
are accurately predicted by a sheath model of truncated bi-Maxwellian electron distribution. The
electron energy transmission is further enhanced by a parallel heat flux of the perpendicular
degrees of freedom. VC 2015 AIP Publishing LLC.
http://dx.doi.org/10.1063/1.4933415
References
...
20 R. Marchand,
Z.
Abou-Assaleh, and J. P. Matte,
Phys. Fluids B
2,
1247(1990).
...
https://aip.scitation.org/doi/10.1063/1.4933415
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