Amplification of ion acoustic wave in an inhomogeneous plasma through nonlinear wave-particle interaction with drift wave turbulence

Deka, P. N.; Borgohain, A.
April 2011
Physics of Plasmas;Apr2011, Vol. 18 Issue 4, p042311
Academic Journal
A study on the amplification of ion acoustic wave in an inhomogeneous plasma has been made on the basis of a nonlinear wave-particle interaction process called plasma maser effect. The drift wave instability, which is a universal phenomenon of an inhomogeneous confined plasma system, is found to be strongly in phase relation with thermal particles and may transfer its wave energy nonlinearly through a modulated field to ion acoustic wave. Considering a Maxwellian distribution function model for inhomogeneous plasmas under the standard local approximation, we have estimated the growth rate for ion acoustic wave, which is obtained by using the nonlinear dispersion relation. It has been found that amplification of ion acoustic wave is possible at the expense of drift wave turbulent energy. This result may be particularly important for stability of various drift modes in magnetically confined plasma as well as for transport of momentum and energy in such inhomogeneous systems.


Related Articles

  • Spatiotemporal multiscaling analysis of impurity transport in plasma turbulence using proper orthogonal decomposition. Futatani, S.; Benkadda, S.; del-Castillo-Negrete, D. // Physics of Plasmas;Apr2009, Vol. 16 Issue 4, p042506 

    The spatiotemporal multiscale dynamics of the turbulent transport of impurities is studied in the context of the collisional drift wave turbulence. Two turbulence regimes are considered: a quasihydrodynamic regime and a quasiadiabatic regime. The impurity is assumed to be a passive scalar...

  • Role of transverse velocity-shear on collisional drift-wave instability in magnetized plasmas. Chakrabarti, Nikhil // Physics of Plasmas;Jan2001, Vol. 8 Issue 1, p97 

    The effect of sheared poloidal flow on collisional drift-wave instability of magnetized plasma is studied. It is shown that transverse flow shear considerably reduced the growth of the instability. A finite but small amount of viscosity completely stabilized the mode. © 2001 American...

  • Unstable-magnetic-drift waves in a plasma with temperature anisotropy. Wu, C. S.; Shi, B. R.; Zhou, G. C. // Physics of Fluids (00319171);Jun86, Vol. 29 Issue 6, p1840 

    A theory of unstable magnetic-drift waves was first discussed by Krall and Rosenbluth [ Phys. Fluids 6, 254 (1963) ]. However, the growth rate is exceedingly small and, therefore, the instability seems to be unimportant. It is found in the present analysis that a weak electron temperature...

  • Linear and nonlinear coupled drift and ion acoustic waves in collisional pair ion-electron magnetoplasma. Mushtaq, A.; Saeed, R.; Haque, Q. // Physics of Plasmas;Apr2011, Vol. 18 Issue 4, p042305 

    Linear and nonlinear coupled electrostatic drift and ion acoustic waves are studied in inhomogeneous, collisional pair ion-electron plasma. The Korteweg-de Vries-Burgers (KdVB) equation for a medium where both dispersion and dissipation are present is derived. An attempt is made to obtain exact...

  • The characteristics of ion acoustic solitons in non-Maxwellian plasmas. Chuang, S.-H.; Hau, L.-N. // Physics of Plasmas;Feb2009, Vol. 16 Issue 2, pN.PAG 

    Ion acoustic solitons may be associated with the electrostatic solitary structures observed in the space plasma environment. Earlier models describing these solutions assume Maxwellian distribution for electrons imbedded in the fluid ions and predict enhanced density that have difficulty in...

  • Weak turbulence theory of the nonlinear evolution of the ion ring distribution. Mithaiwala, M.; Rudakov, L.; Ganguli, G.; Crabtree, C. // Physics of Plasmas;May2011, Vol. 18 Issue 5, p055710 

    The nonlinear evolution of an ion ring instability in a low β magnetospheric plasma is considered. The evolution of the two-dimensional ring distribution is essentially quasilinear. Ignoring nonlinear processes the timescale for the quasilinear evolution is the same as for the linear...

  • Low frequency fishbone mode induced by circulating particles in spherical tori. Kolesnichenko, Ya. I.; Marchenko, V. S.; White, R. B. // Physics of Plasmas;Jul2001, Vol. 8 Issue 7, p3143 

    It is found that high β in low-aspect-ratio tori tends to stabilize the fishbone instability in a plasma with energetic circulating ions. The stabilization results from enhancement of the toroidal drift motion by large Shafranov shift, which makes it difficult to reconcile the condition of...

  • The role of coherent vorticity in turbulent transport in resistive drift-wave turbulence. Bos, W. J. T.; Futatani, S.; Benkadda, S.; Farge, M.; Schneider, K. // Physics of Plasmas;Jul2008, Vol. 15 Issue 7, p072305 

    The coherent vortex extraction method, a wavelet technique for extracting coherent vortices out of turbulent flows, is applied to simulations of resistive drift-wave turbulence in magnetized plasma (Hasegawa–Wakatani system). The aim is to retain only the essential degrees of freedom,...

  • Linear study of the nonmodal growth of drift waves in dusty plasmas. Manz, P.; Greiner, F. // Physics of Plasmas;Jun2010, Vol. 17 Issue 6, p063703 

    The main effect of dust on drift wave turbulence is the enhancement of the nonadiabaticity. Previous work found that nonmodal behavior is important in the nonadiabatic regime of the drift wave system. Here, the modal and nonmodal properties of the linear Hasegawa–Wakatani system of dusty...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics