Physics – Plasma Physics
Scientific paper
Nov 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004georl..3122806t&link_type=abstract
Geophysical Research Letters, Volume 31, Issue 22, CiteID L22806
Physics
Plasma Physics
11
Space Plasma Physics: Magnetic Reconnection, Space Plasma Physics: Nonlinear Phenomena, Space Plasma Physics: Numerical Simulation Studies, Space Plasma Physics: Wave/Particle Interactions, Space Plasma Physics: Waves And Instabilities
Scientific paper
Influence of the guide field on quick magnetic reconnection triggering (QMRT) is investigated by three-dimensional (3-D) full-particle simulations with the mass ratio of 400. Here two runs with different current sheet thickness (D = 0.35 and 0.5, D: the current sheet half thickness normalized by the ion inertial length) are performed with a constant guide field of B0y = 0.75B0x (B0x: asymptotic magnitude of reconnecting component). QMRT has been found in a null guide-field case of D = 0.5 ~ 0.875 and is quick because reconnection onset is directly coupled to the most quickly growing mode in the system, the lower-hybrid drift instability (LHDI) (I. Shinohara and M. Fujimoto, Quick triggering of magnetic reconnection in an ion-scale current sheet, submitted to Physical Review Letters, 2004, hereinafter referred to as Shinohara and Fujimoto, submitted manuscript, 2004). In contrast D = 0.5 with B0y = 0.75B0x is too thick to be subject to QMRT. Recovery of QMRT is found at D = 0.35, accompanying a single X-line formation with slight delay from the LHDI saturation.
Fujimoto Minoru
Shinohara Iku
Tanaka Kenny G.
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