JEANíS INSTABILITY IN A COMPLEX PLASMA IN PRESENCE OF SECONDARY ELECTRONS AND NONTHERMAL IONS
Susmita Sarkar and Saumyen Maity
Department of Applied Mathematics, University of Calcutta, India
Abstract. In this paper we have investigated the effect of secondary electron emission and nonthermality of ion velocity distribution simultaneously on Jeanís instability in a complex plasma in presence of negatively charged dust grains. Primary and secondary electron temperatures are assumed to be equal. Thus plasma under consideration consists of Boltzmann distributed electrons, nonthermal ions and negatively charged dust grains. The dust grain component is modeled by continuity and momentum equations. From the linear dispersion relation we have calculated the real frequency and growth rate of the Jeanís mode. Numerically it is found that for lower values of the nonthermal parameter Jeanís instability is higher for higher secondary electron emission whereas the effect of secondary electron emission on Jeanís instability becomes insignificant for higher values of the nonthermal parameter.