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Title: Dipole-quadrupole dynamics during magnetic field reversals

Abstract

The shape and the dynamics of reversals of the magnetic field in a turbulent dynamo experiment are investigated. We report the evolution of the dipolar and the quadrupolar parts of the magnetic field in the VKS experiment, and show that the experimental results are in good agreement with the predictions of a recent model of reversals: when the dipole reverses, part of the magnetic energy is transferred to the quadrupole, reversals begin with a slow decay of the dipole and are followed by a fast recovery, together with an overshoot of the dipole. Random reversals are observed at the borderline between stationary and oscillatory dynamos.

Authors:
 [1]
  1. Department of Astrophysical Sciences, Princeton University, Princeton, New Jersey 08544 (United States)
Publication Date:
OSTI Identifier:
21502851
Resource Type:
Journal Article
Journal Name:
Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics (Print)
Additional Journal Information:
Journal Volume: 82; Journal Issue: 5; Other Information: DOI: 10.1103/PhysRevE.82.056302; (c) 2010 The American Physical Society; Journal ID: ISSN 1539-3755
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; DIPOLES; EVOLUTION; FORECASTING; MAGNETIC FIELD REVERSAL; MAGNETIC FIELDS; RANDOMNESS; MAGNETIC FIELD CONFIGURATIONS; MULTIPOLES

Citation Formats

Gissinger, Christophe. Dipole-quadrupole dynamics during magnetic field reversals. United States: N. p., 2010. Web. doi:10.1103/PHYSREVE.82.056302.
Gissinger, Christophe. Dipole-quadrupole dynamics during magnetic field reversals. United States. doi:10.1103/PHYSREVE.82.056302.
Gissinger, Christophe. Mon . "Dipole-quadrupole dynamics during magnetic field reversals". United States. doi:10.1103/PHYSREVE.82.056302.
@article{osti_21502851,
title = {Dipole-quadrupole dynamics during magnetic field reversals},
author = {Gissinger, Christophe},
abstractNote = {The shape and the dynamics of reversals of the magnetic field in a turbulent dynamo experiment are investigated. We report the evolution of the dipolar and the quadrupolar parts of the magnetic field in the VKS experiment, and show that the experimental results are in good agreement with the predictions of a recent model of reversals: when the dipole reverses, part of the magnetic energy is transferred to the quadrupole, reversals begin with a slow decay of the dipole and are followed by a fast recovery, together with an overshoot of the dipole. Random reversals are observed at the borderline between stationary and oscillatory dynamos.},
doi = {10.1103/PHYSREVE.82.056302},
journal = {Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics (Print)},
issn = {1539-3755},
number = 5,
volume = 82,
place = {United States},
year = {2010},
month = {11}
}