Existence domains of dust-acoustic solitons and supersolitons
Existence domains of dust-acoustic solitons and supersolitons
Date
2013Author
Maharaj, S.K.
Bharuthram, Ramashwar
Singh, S. V.
Lakhina, G. S.
Metadata
Show full item recordAbstract
Using the Sagdeev potential method, the existence of large amplitude dust-acoustic solitons and
supersolitons is investigated in a plasma comprising cold negative dust, adiabatic positive dust,
Boltzmann electrons, and non-thermal ions. This model supports the existence of positive potential
supersolitons in a certain region in parameter space in addition to regular solitons having negative
and positive potentials. The lower Mach number limit for supersolitons coincides with the
occurrence of double layers whereas the upper limit is imposed by the constraint that the adiabatic
positive dust number density must remain real valued. The upper Mach number limits for negative
potential (positive potential) solitons coincide with limiting values of the negative (positive)
potential for which the negative (positive) dust number density is real valued. Alternatively, the
existence of positive potential solitons can terminate when positive potential double layers occur. Using the Sagdeev potential method, the existence of large amplitude dust-acoustic solitons and
supersolitons is investigated in a plasma comprising cold negative dust, adiabatic positive dust,
Boltzmann electrons, and non-thermal ions. This model supports the existence of positive potential
supersolitons in a certain region in parameter space in addition to regular solitons having negative
and positive potentials. The lower Mach number limit for supersolitons coincides with the
occurrence of double layers whereas the upper limit is imposed by the constraint that the adiabatic
positive dust number density must remain real valued. The upper Mach number limits for negative
potential (positive potential) solitons coincide with limiting values of the negative (positive)
potential for which the negative (positive) dust number density is real valued. Alternatively, the
existence of positive potential solitons can terminate when positive potential double layers occur.