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Title
Japanese: 
English:Numerical study of electric potential formation in a weakly ionized plasma flowing supersonically through open magnetic field lines 
Author
Japanese: LAOSUNTHAR AMPAN, 武田 遵, 赤塚 洋.  
English: Ampan Laosunthara, Jun Takeda, Hiroshi Akatsuka.  
Language English 
Journal/Book name
Japanese: 
English:Japanese Journal of Applied Physics 
Volume, Number, Page Vol. 56    No. 1    016201
Published date Nov. 30, 2016 
Publisher
Japanese: 
English:IOP Publishing 
Conference name
Japanese: 
English: 
Conference site
Japanese: 
English: 
Official URL https://iopscience.iop.org/article/10.7567/JJAP.56.016201
 
DOI https://doi.org/10.7567/JJAP.56.016201
Abstract We investigate the mechanism of space potential formation due to a diverging magnetic field on a rarefied weakly ionized plasma flowing supersonically by performing a hybrid simulation. Ions and neutrals are treated by the particle-based direct simulation Monte Carlo method, while electrons are treated as a fluid to save time and memory. We apply an electron continuity equation in order to treat the electron velocity independently of the ion velocity. We find the number density of ions (and electrons) distributed along the magnetic field. We also find electron rotation along the flowing direction. Since we remove the current-free condition assumed in our previous study, we find that the longitudinal variation in the space potential agrees reasonably well with our previous experimental results.

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