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Potential Due to a Magnetized Object

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A 100 KW Class Applied-field Magnetoplasmadynamic Thruster
11:47

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Published on: December 22, 2018

Double-layer shocks in a magnetized quantum plasma.

A P Misra1, S Samanta

  • 1Department of Physics, Umeå University, SE-901 87 Umeå, Sweden. apmisra@visva-bharati.ac.in

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|January 15, 2011
PubMed
Summary
This summary is machine-generated.

Researchers observed electrostatic shocks with double-layer structures in quantum plasmas. These novel quantum ion-acoustic waves could accelerate particles in laser-plasma experiments and astrophysical objects.

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Area of Science:

  • Plasma Physics
  • Quantum Plasma Dynamics
  • Astrophysical Plasmas

Background:

  • Ion-acoustic waves are fundamental in plasma physics.
  • Quantum effects become significant in dense or low-temperature plasmas.
  • Understanding wave propagation in magnetized plasmas is crucial for various applications.

Purpose of the Study:

  • To investigate the formation of electrostatic shocks in quantum electron-positron-ion plasmas.
  • To analyze the structure and dependence of these shocks on plasma parameters.
  • To explore potential applications of these phenomena.

Main Methods:

  • Theoretical analysis of quantum ion-acoustic waves.
  • Numerical simulations of wave propagation in a magnetized quantum plasma.
  • Investigation of the role of quantum coupling parameter (H) and positron-to-electron density ratio (δ).

Main Results:

  • Formation of finite amplitude electrostatic shocks with double-layer (DL) structures.
  • DL shocks consist of compressive and rarefactive slow-wave fronts.
  • Shock formation is critically dependent on quantum coupling (H) and density ratio (δ).
  • Initial steepening of wave profiles leading to solitary waves preceding the shocks.

Conclusions:

  • Novel DL electrostatic shocks are predicted in quantum electron-positron-ion plasmas.
  • These shocks exhibit unique structures influenced by quantum effects.
  • Potential applications include particle acceleration in laser-plasma interactions and astrophysical environments like magnetized white dwarfs.