Speaker
Prerana Sharma
Description
See the full Abstract at http://ocs.ciemat.es/EPS2018ABS/pdf/P1.2016.pdf
Effect of Fermi pressure and Bohm potential on Langmuir decay
instability in strongly coupled degenerate plasma
Prerana Sharma and K. Avinash
Department of Physics and Astrophysics, University of Delhi, Delhi 110007, India
Langmuir decay instability (LDI) in strongly coupled degenerate plasma is examined. In this
study, the electrons are degenerate and weakly correlated, while non-degenerate ions are
strongly correlated. The dynamics of weakly coupled degenerate electron fluid is governed
by quantum hydrodynamics. The quantum forces associated with the quantum diffraction
effects and the quantum statistical effects act on the degenerate electron fluid. The strong
correlation effects of ion are embedded in generalized viscoelastic momentum equation
including the viscoelasticity and shear viscosities of ion fluid. It is shown that strong
correlation/coupling effects enhance the growth rate of instabilities, while the quantum
effects suppress the instabilities. The results are analyzed for understanding LDI in dense
white dwarfs which consist of degenerate electrons and strongly coupled ions.
Keywords- Strongly coupled plasma, astrophysical plasmas, parametric instabilities and
quantum plasma.
References
[1] P K Kaw and A Sen ,Phys. Plasmas, 5, 3552 (1998).
[2] P Sharma, K Avinash and D N Gupta, Phys. Plasmas , 23 , 102704 (2016).
[3] F Haas, Braz. J. Phys., 41, pp 349-363 (2011).
[4] S Ghosh , N Chakarabarty and P K Shukla , Phys. Plasmas, 19, 072123 (2012).
