Inertia driven radial breathing and nonlinear relaxation in cylindrically confined pure electron plasma

Journal Article · Mon Jun 29 00:00:00 EDT 2015 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.4923108· OSTI ID:22490689

Sengupta, M.; Ganesh, R. ^[1]

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1. Institute for Plasma Research, Bhat, Gandhinagar 382428 (India)

The dynamics of cylindrically trapped electron plasma has been investigated using a newly developed 2D Electrostatic PIC code that uses unapproximated, mass-included equations of motion for simulation. Exhaustive simulations, covering the entire range of Brillouin ratio, were performed for uniformly filled circular profiles in rigid rotor equilibrium. The same profiles were then loaded away from equilibrium with an initial value of rigid rotation frequency different from that required for radial force balance. Both these sets of simulations were performed for an initial zero-temperature or cold load of the plasma with no spread in either angular velocity or radial velocity. The evolution of the off-equilibrium initial conditions to a steady state involve radial breathing of the profile that scales in amplitude and algebraic growth with Brillouin fraction. For higher Brillouin fractions, the growth of the breathing mode is followed by complex dynamics of spontaneous hollow density structures, excitation of poloidal modes, leading to a monotonically falling density profile.

• OSTI ID: 22490689
• Journal Information: AIP Conference Proceedings, Vol. 1668, Issue 1; Conference: 11. international workshop on non-neutral plasmas, Takamatsu (Japan), 1-4 Dec 2014; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ANGULAR VELOCITY
COMPUTERIZED SIMULATION
CYLINDRICAL CONFIGURATION
EQUATIONS OF MOTION
EXCITATION
MOMENT OF INERTIA
NONLINEAR PROBLEMS
P CODES
PLASMA
PLASMA DENSITY
PLASMA RADIAL PROFILES
PLASMA SIMULATION
RADIAL VELOCITY
RELAXATION
ROTATION
STEADY-STATE CONDITIONS
TRAPPED ELECTRONS