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Inertial and anisotropic pressure effects on cross-field electron transport in low-temperature magnetized plasmas

Journal Article · · Journal of Physics. D, Applied Physics
In this paper, a one-dimensional (1D) particle-in-cell Monte Carlo collision (PIC-MCC) model is developed to investigate the effects of anisotropic pressure and inertial terms due to non-Maxwellian velocity distribution functions on cross-field electron transport. The conservation of momentum is evaluated by taking the moments of the first-principles gas-kinetic equation. A steady-state discharge is obtained without any low-frequency ionization oscillations by considering an anomalous electron scattering profile. Further, the results obtained from the 1D PIC-MCC model are compared with fluid models, including the quasi-neutral drift-diffusion (DD), non-neutral DD, and full fluid moment models. The discharge current obtained from the PIC-MCC model is in good agreement with the fluid models. The cross-field electron transport due to the inertial terms, i.e. the gradient of axial and azimuthal drift, is evaluated. Moreover, PIC-MCC simulation results show non-zero, anisotropic, off-diagonal pressure tensor terms due to asymmetric non-Maxwellian electron velocity distribution function, potentially contributing to cross-field electron transport.
Research Organization:
Stanford Univ., CA (United States); Stanford University, CA (United States)
Sponsoring Organization:
National Aeronautics and Space Administration (NASA); US Air Force Office of Scientific Research (AFOSR); USDOE Office of Science (SC), Fusion Energy Sciences (FES)
Grant/Contract Number:
SC0020623
OSTI ID:
2421614
Alternate ID(s):
OSTI ID: 2479077
Journal Information:
Journal of Physics. D, Applied Physics, Journal Name: Journal of Physics. D, Applied Physics Journal Issue: 38 Vol. 56; ISSN 0022-3727
Publisher:
IOP PublishingCopyright Statement
Country of Publication:
United States
Language:
English

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