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FIZIKA A 18 (2009) 3 , 89-106
 
INFLUENCE OF NEGATIVE IONS ON ION-ACOUSTIC SOLITARY WAVES IN A
TWO-ELECTRON-TEMPERATURE PLASMA
SANKAR CHATTOPADHYAYa,b, S. N. PAULc and DIPANKAR RAYd
aCentre for Theoretical Plasma Research, 346, Ramkrishna Pally (Balaka),
P.O. Sonarpur, Kolkata - 700150, West Bengal, India
bDepartment of Mathematics, Daria J.L.N Vidyalaya, South 24 Parganas,
743376, West Bengal, India
cSerampore Girls' College, Hooghly, 71220, India
dDepartment of Mathematics, Jadavpur University, Kolkata - 700032,
India
Received 10 February 2008; Revised manuscript received 19 July
2009
Accepted 2 September 2009 Online 13 October 2009
Ion-acoustic solitary waves in a drift negative ion plasma have been
investigated for two-electron temperatures. Tagare and Reddy studied the effect
of higher-order nonlinearity on ion-acoustic waves with cold positive and
negative ions for isothermal and non-isothermal electrons using reductive
perturbation technique. In this work, we study warm positive and negative ions
with two-temperature isothermal electrons using the pseudopotential method. It
is found that the concentration of negative ions, drift velocities, mass ratios,
equal temperatures of ions (particular case) and presence of two groups of
electrons and their ratios modify the profiles of the Sagdeev pseudopotential
curves of the solitary waves in the plasma of the first- (f1) and second-order (f2)
solitary-wave solutions.
PACS numbers: 52.35.Fp, 52.35.Sb
UDC 533.951
Keywords: ion-acoustic solitary waves, drift negative ion plasma,
two-electron temperatures, Sagdeev pseudopotential, first- and second-order
solutions
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