1. Impact of the Eulerian chaos of magnetic field lines in magnetic reconnection
- Author
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Ricardo Farengo, Hugo Ferrari, Marie-Christine Firpo, Wahb Ettoumi, Agustin Lifschitz, Alessandro Retinò, P. García-Martínez, Laboratoire de Physique des Plasmas (LPP), Université Paris-Sud - Paris 11 (UP11)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École polytechnique (X)-Sorbonne Université (SU)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'optique appliquée (LOA), École Nationale Supérieure de Techniques Avancées (ENSTA Paris)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Centro Atómico Bariloche [Argentine], Consejo Nacional de Investigaciones Científicas y Técnicas [Buenos Aires] (CONICET)-Comisión Nacional de Energía Atómica [ARGENTINA] (CNEA), Université Paris-Saclay-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-École polytechnique (X)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL), and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École polytechnique (X)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)
- Subjects
Chaos and Stochasticity ,Tokamak ,Nuclear Fusion ,Ciencias Físicas ,Sun corona ,Lyapunov exponent ,01 natural sciences ,010305 fluids & plasmas ,law.invention ,purl.org/becyt/ford/1 [https] ,symbols.namesake ,Acceleration ,law ,[PHYS.PHYS.PHYS-PLASM-PH]Physics [physics]/Physics [physics]/Plasma Physics [physics.plasm-ph] ,0103 physical sciences ,Magnetic Confinement ,Magnetic Reconnection ,010306 general physics ,Magnetosphere particle motion ,ComputingMilieux_MISCELLANEOUS ,acceleration of particles ,Physics ,[SDU.ASTR.SR]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Solar and Stellar Astrophysics [astro-ph.SR] ,Eulerian path ,Magnetic reconnection ,purl.org/becyt/ford/1.3 [https] ,Condensed Matter Physics ,Magnetic field ,Astronomía ,Classical mechanics ,symbols ,Vector field ,[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] ,CIENCIAS NATURALES Y EXACTAS - Abstract
Stochasticity is an ingredient that may allow the breaking of the frozen-in law in the reconnection process. It will first be argued that the non-ideal effects may be considered as an implicit way to introduce stochasticity. Yet there also exists an explicit stochasticity that does not require the invocation of non-ideal effects. This comes from the spatial (or Eulerian) chaos of magnetic field lines that can show up only in a truly three-dimensional description of magnetic reconnection since the two-dimensional models impose the integrability of the magnetic field lines. Some implications of this magnetic braiding, such as the increased particle finite-time Lyapunov exponents and increased acceleration of charged particles, are discussed in the frame of tokamak sawteeth that forms a laboratory prototype of spontaneous magnetic reconnection. A justification for an increased reconnection rate with chaotic vs. the integrable magnetic field lines is proposed. Moreover, in 3D, the Eulerian chaos of the magnetic field lines may coexist with the Eulerian chaos of velocity field lines, that is more commonly named the turbulence. Fil: Firpo, M. C.. Centre National de la Recherche Scientifique; Francia Fil: Ettoumi, W.. Centre National de la Recherche Scientifique; Francia. Universidad de Ginebra; Suiza Fil: Lifschitz, Agustin Federico. Centre National de la Recherche Scientifique; Francia Fil: Retinò, A.. Centre National de la Recherche Scientifique; Francia Fil: Farengo, Ricardo. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina Fil: Ferrari, Hugo Emilio. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina Fil: Garcia Martinez, Pablo Luis. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
- Published
- 2016
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