Physics – Plasma Physics
Scientific paper
Jan 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994p%26ss...42...47m&link_type=abstract
Planetary and Space Science (ISSN 0032-0633), vol. 42, no. 1, p. 47-53
Physics
Plasma Physics
1
Beam Injection, Boundary Conditions, Electron Beams, Electrostatics, Ionization, Magnetohydrodynamic Stability, Plasma Jets, Stagnation Point, Computerized Simulation, Electron Density (Concentration), Plasma Physics
Scientific paper
A simulation of the beam-plasma discharge is attempted in this paper by using a particle-in-cell code in a one-dimensional system. Two different boundary conditions are adopted in the present study. When the open boundary is used, the stagnation region expands slowly and most ionization occurs only in a limited region near the beam injection boundary. The electrostatic energy deposited from the beam is inversely proportional to the electron-neutral collision frequency. When this open boundary is replaced by a grounded conducting wall, the stagnation point formed intially near the emitter moves quickly toward the wall and significant ionization is observed in the entire system. Beam-plasma instability is observed in the late evolution of the bounded system.
Min Kyoung
Seon Kwangil
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