Hall magnetic reconnection: Guide field dependence
- Plasma Physics Division, Naval Research Laboratory, Washington, DC 20375-5320 (United States)
Two-dimensional Hall magnetohydrodynamic simulations are used to study the dependence of a guide field on magnetic reconnection. The simulations are run until a steady state is achieved for B{sub gf}/B{sub 0}=0, 0.1, 0.2, 0.5, 1.0, 2.0, and 5.0 where B{sub gf} is the guide field and B{sub 0} is the reversed field. It is found that the reconnection rate and plasma energization are reduced for increasing guide field strength. This is caused by a JxB force associated with Hall currents and the guide field that reduce the inflow and outflow velocities. However, the reconnection rate and plasma energization are only reduced by a factor of 2 for B{sub gf}=5B{sub 0}. Additionally, the quadrupole field associated with Hall reconnection is eliminated for B{sub gf}{approx_equal}B{sub 0}/3. Applications to magnetospheric plasmas are discussed.
- OSTI ID:
- 20657965
- Journal Information:
- Physics of Plasmas, Vol. 12, Issue 1; Other Information: DOI: 10.1063/1.1834592; (c) 2005 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
- Country of Publication:
- United States
- Language:
- English
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