Do double layers separate an electronegative core and an electropositive halo in weakly collisional negative ion plasmas?*

2009 ◽  
Author(s):  
Noah Hershkowitz ◽  
Young-chul Ghim ◽  
Chi-Shung Yip
Keyword(s):  
Negative Ion ◽  
Double Layers ◽  
Negative Ion Plasmas

On the existence of ion-acoustic double layers in negative-ion plasmas

1991 ◽  
Vol 46 (2) ◽  
pp. 247-254 ◽  
Author(s):  
S. Baboolal ◽  
R. Bharuthram ◽  
M. A. Hellberg
Keyword(s):  
Negative Ion ◽  
Double Layers ◽  
Positive Ions ◽  
Potential Formulation ◽  
Ion Acoustic ◽  
Negative Ion Plasmas ◽  
Temperature Electron ◽  
Arbitrary Amplitude ◽  
Ion Acoustic Double Layers ◽  
Ion Species

It is well known that ion-acoustic double layers occur in plasmas containing two-temperature electron species and positive ions. In a recent study Verheest suggested that such structures can occur when there is only one electron species but both negative and positive ion species. There a stationary modified Korteweg de Vries equation was derived to support his deduction. This prediction, however, contradicts our own arbitrary-amplitude studies, which also cover the Verheest parameter regime. Here we resolve the discrepancy by examining both approaches in the pseudo-potential formulation in more relevant detail. The implications of this study extend beyond the realm of the present subject.

Cut-off conditions and existence domains for large-amplitude ion-acoustic solitons and double layers in fluid plasmas

1990 ◽  
Vol 44 (1) ◽  
pp. 1-23 ◽  
Author(s):  
S. Baboolal ◽  
R. Bharuthram ◽  
M. A. Hellberg
Keyword(s):  
Negative Ion ◽  
Double Layers ◽  
Sagdeev Potential ◽  
Ion Acoustic ◽  
Negative Ion Plasmas ◽  
Ion Acoustic Solitons ◽  
Arbitrary Amplitude ◽  
Ion Species ◽  
Positive Ion

It is shown how existence domains for arbitrary-amplitude ion-acoustic solitons and double layers are determined numerically by cut-off conditions on the corresponding Sagdeev potential. A two-electron-temperature model is considered, and in positive-ion plasmas the cut-off conditions are given in terms of the electron parameters, while for negative-ion plasmas such conditions are described in terms of parameters characterizing the role of the negative ion species.

Numerical modeling of the transport process of negative-ion plasmas in photodetachment measurement

2006 ◽  
Vol 77 (3) ◽  
pp. 03A531 ◽  
Author(s):  
T. Mizuno ◽  
S. Nakata ◽  
N. Takado ◽  
T. Matusmiya ◽  
T. Sakurabayashi ◽  
...  
Keyword(s):  
Numerical Modeling ◽  
Transport Process ◽  
Negative Ion ◽  
Negative Ion Plasmas

Observations on negative ion plasmas

1993 ◽  
Vol 2 (2) ◽  
pp. 73-80 ◽  
Author(s):  
J L Cooney ◽  
D W Aossey ◽  
J E Williams ◽  
M T Gavin ◽  
Hyun Soo Kim ◽  
...  
Keyword(s):  
Negative Ion ◽  
Negative Ion Plasmas

Electrostatic ion cyclotron instabilities in negative ion plasmas

1996 ◽  
Vol 3 (4) ◽  
pp. 1202-1211 ◽  
Author(s):  
V. W. Chow ◽  
M. Rosenberg
Keyword(s):  
Negative Ion ◽  
Ion Cyclotron ◽  
Negative Ion Plasmas

Parallel-velocity-shear-modified drift wave in negative ion plasmas

2009 ◽  
Vol 51 (3) ◽  
pp. 035011 ◽  
Author(s):  
R Ichiki ◽  
T Kaneko ◽  
K Hayashi ◽  
S Tamura ◽  
R Hatakeyama
Keyword(s):  
Velocity Shear ◽  
Negative Ion ◽  
Drift Wave ◽  
Negative Ion Plasmas
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