Modulational instability of ion-acoustic wave envelopes in magnetized quantum electron-positron-ion plasmas

Journal Article · Fri Jan 15 04:00:00 EST 2010 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.3293119· OSTI ID:21344642

Bains, A S; Gill, T S ^[1]; Misra, A P ^[2]; Saini, N S ^[3]

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1. Department of Physics, Guru Nanak Dev University, Amritsar 143005 (India)
2. Department of Physics, Umeaa University, SE 901 87 Umeaa (Sweden)
3. Centre for Plasma Physics, School of Mathematics and Physics, Queen's University Belfast, BT7 1NN Northern Ireland (United Kingdom)

The amplitude modulation of quantum ion-acoustic waves (QIAWs) along an external magnetic field is studied in a quantum electron-positron-ion (e-p-i) magnetoplasma. Reductive perturbation technique is used to derive the three-dimensional nonlinear Schroedinger equation which governs the slow modulation of QIAW packets. Accounting for the effects of the electron to ion number density ratio (mu), the normalized ion-cyclotron frequency (omega{sub c}) as well as the ratio (H) of the 'plasmonic energy density' to the Fermi energy, new regimes for the modulational instability of QIAWs are obtained and analyzed. In contrast to one-dimensional unmagnetized e-p-i plasmas, the instability growth rate is shown to suppress with increasing mu or decreasing the values of H. The predicted results could be important for understanding the salient features of modulated QIAW packets in dense astrophysical plasmas as well as to the next generation intense laser solid density plasma experiments.

• OSTI ID: 21344642
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 1 Vol. 17; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ANTILEPTONS
ANTIMATTER
ANTIPARTICLES
CHARGED PARTICLES
CONFINEMENT
DIFFERENTIAL EQUATIONS
ELECTRONS
ELEMENTARY PARTICLES
EQUATIONS
FERMIONS
INSTABILITY
INSTABILITY GROWTH RATES
ION ACOUSTIC WAVES
ION WAVES
IONS
LEPTONS
MAGNETIC FIELDS
MATTER
MODULATION
NONLINEAR PROBLEMS
PARTIAL DIFFERENTIAL EQUATIONS
PERTURBATION THEORY
PLASMA
PLASMA CONFINEMENT
PLASMA INSTABILITY
PLASMA WAVES
POSITRONS
SCHROEDINGER EQUATION
THREE-DIMENSIONAL CALCULATIONS
WAVE EQUATIONS