Effects of a generalized presheath source in flowing magnetized plasmas

Journal Article · Fri Nov 01 04:00:00 EST 1991 · Physics of Fluids B; (United States)

DOI:https://doi.org/10.1063/1.859784· OSTI ID:5018990

Chung, K ^[1]; Hutchinson, I H ^[2]

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1. Department of Nuclear Engineering, Hanyang University, Seoul (Korea)
2. Plasma Fusion Center, Massachusetts Institute of Technology, Cambridge, Massachusetts (USA)

This paper extends the previous kinetic model (Phys. Rev. A {bold 38}, 4721 (1988)) of probing objects in flowing magnetized plasmas by generalizing cross-field transport and adding ionization to the source in the Boltzmann equation along the presheath. Ion sheath current density and ratio ({ital R}) of upstream to downstream current are obtained as a function of normalized plasma drift velocity ({ital M}), equivalent viscosity ratio ({alpha}), ion temperature ({ital T}{sub {ital i}{infinity}}), and ionization rate ({sigma}{sub {ital i}}). The form {ital R}=exp({ital M}/{ital M}{sub {ital c}}) fits the results very well and the calibration factor ({ital M}{sub {ital c}}) is obtained. Here {ital M}{sub {ital c}} decreases as {alpha} increases, {ital T}{sub {ital i}{infinity}} increases, or {sigma}{sub {ital i}} increases. Comparisons with fluid and kinetic models are presented.

• DOE Contract Number: AC02-78ET51013
• OSTI ID: 5018990
• Journal Information: Physics of Fluids B; (United States), Journal Name: Physics of Fluids B; (United States) Vol. 3:11; ISSN 0899-8221; ISSN PFBPE
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700103* -- Fusion Energy-- Plasma Research-- Kinetics
BOLTZMANN EQUATION
CORRELATIONS
CROSSED FIELDS
DIFFERENTIAL EQUATIONS
DIFFUSION
EQUATIONS
ION TEMPERATURE
IONIZATION
MAGNETIZATION
PARTIAL DIFFERENTIAL EQUATIONS
PLASMA DRIFT
PLASMA SHEATH
USES
VISCOSITY