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FIZIKA A 16 (2007) 2 , 63-78
 
EFFECTS OF DRIFT NEGATIVE ION PLASMAS ON ION-ACOUSTIC
SOLITARY WAVES IN DRIFT COLD POSITIVE ION PLASMAS WITH ISOTHERMAL ELECTRONS
SANKAR CHATTOPADHYAYa,b
aCentre for Theoretical Plasma Research, 346, R. K. Pally (Balaka),
Sonarpur, Kolkata-150, West Bengal, India
bDepartment of Mathematics, Daria J. L. N Vidyalaya, South 24
parganas, West Bengal, India
E-mail address: sankar_djln@yahoo.com
Received 13 February 2006; Revised manuscript received 19
February 2007
Accepted 16 May 2007 Online 24 September 2007
The effects of higher-order non-linearity on ion-acoustic solitary waves in a
collisionless isothermal electron plasma with cold positive and negative ions
are investigated by using the pseudopotential method. The influence of negative
ions on solitary waves as well as on the first- and second-order amplitudes,
widths and phase velocities are discussed for the plasmas having He+
,O-, He+, Cl-
or H+ ,O-
ions with the variation of parameters. The results are depicted in figures. We
discuss the range of the electrostatic potential function (f)
for which the pseudopotential function (y) is valid
up to a desired degree of accuracy.
PACS numbers: 52.35.Fp, 52.35.Sb
UDC 535.951
Keywords: ion-acoustic solitary waves, collisionless isothermal electron plasma,
cold positive and negative ions, He+ ,O-,
He+ , Cl- and H+ ,O
- ions, drift motion
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