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Title: Forcing continuous reconnection in hybrid simulations

We have performed hybrid simulations of driven continuous reconnection with open boundary conditions. Reconnection is started by a collision of two subsonic plasma fronts with opposite magnetic fields, without any specified magnetic field configuration as initial condition. Due to continued forced plasma inflow, a current sheet co-located with a dense and hot plasma sheet develops. The translational symmetry of the current sheet is broken by applying a spatial gradient in the inflow speed. We compare runs with and without localized resistivity: reconnection is initiated in both cases, but localized resistivity stabilizes it and enhances its efficiency. The outflow speed reaches about half of Alfvén speed. We quantify the conversion of magnetic energy to kinetic energy of protons and to Joule heating and show that with localized resistivity, kinetic energy of protons is increased on average five-fold in the reconnection in our simulation case.
Authors:
;  [1] ;  [1] ;  [2] ;  [3] ;  [4]
  1. Finnish Meteorological Institute, PL 503, FI-00101 Helsinki (Finland)
  2. (United States)
  3. School of Electrical Engineering, Aalto University, PL 13000, FI-00076 Aalto, Espoo (Finland)
  4. (Finland)
Publication Date:
OSTI Identifier:
22299842
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 21; Journal Issue: 7; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; BOUNDARY CONDITIONS; COLLISIONS; CURRENTS; HOT PLASMA; JOULE HEATING; KINETIC ENERGY; MAGNETIC FIELD CONFIGURATIONS; MAGNETIC FIELDS; PROTONS; SIMULATION