We examine the eeect of weak, small scale magnetic eld structure on the rate of reconnection in a strongly magnetized plasma. This aaects the rate of reconnection by reducing the transverse scale for reconnection ows, and by allowing many independent ux reconnection events to occur simultaneously. Allowing only for the rst eeect and using Goldreich and Sridhar's model of strong turbulence in a ...

We study the role of the guide field in relativistic magnetic reconnection in a Harris current sheet of pair (e±) plasmas, using linear theories and particlein-cell (PIC) simulations. Two-dimensional PIC simulations exhibit the guide field dependence to the linear instabilities; the tearing or reconnection modes are relatively insensitive, while the relativistic drift-kink instability (RDKI), t...

[1] Magnetic reconnection at the terrestrial magnetopause is frequently intermittent, leading to the formation of localized reconnected flux bundles referred to as flux transfer events (FTEs). It remains unclear whether the intermittency of the process is intrinsic or arises because of fluctuations of solar wind properties. Here we use Ganymede’s magnetosphere, which is embedded in a background...

Dynamical process of magnetic reconnection controlled by multi-scale physics is investigated using a series of numerical simulation models developed for the analysis of magnetic reconnection in open systems. Two dissipation regions with different spatial scales are formed inside the kinetic regime and a new force balance state is realized there through the combined action of the Hall effect and...

Aims. To investigate the relationship between surges and magnetic reconnection during the emergence of small-scale active regions. In particular, to examine how the large-scale geometry of the magnetic field, shaped by different phases of reconnection, guides the flowing of surges. Methods. We present three flux emergence models. The first model, and the simplest, consists of a region emerging ...

Measurements of localized ion heating during magnetic reconnection in the Madison Symmetric Torus reversed field pinch R. N. Dexter, D. W. Kerst, T. W. Lovell, S. C. Prager, and J. C. Sprott, Fusion Technol. 19, 131 1991 are presented using two beam-based diagnostics: Charge exchange recombination spectroscopy and Rutherford scattering. Data have been collected from three types of impulsive rec...

We study the role of guide field in relativistic magnetic reconnection in a Harris current sheet of pair (e±) plasmas, using linear theories and particlein-cell (PIC) simulations. Two-dimensional PIC simulations exhibit the guide field dependence to the linear instabilities; the tearing or reconnection modes are relatively insensitive, while the relativistic drift-kink instability (RDKI), the f...

We discuss the model of magnetic field reconnection in the presence of turbulence introduced by us ten years ago. The model does not require any plasma effects to be involved in order to make the reconnection fast. In fact, it shows that the degree of magnetic field stochasticity controls the reconnection. The turbulence in the model is assumed to be subAlfvenic, with the magnetic field only sl...

cosmic rays (cr) travel at speeds essentially indistinguishable from the speed of light. however whilst travelling through magnetic fields, both regular and turbulent, they are delayed behind the light since they are usually charged particles and their paths are not linear. those delays can be so long that they are an impediment to correctly identifying sources which may be variable in time. fu...

During magnetic reconnection, a “neutral sheet” current is induced, heating the plasma. The resultant plasma thermal pressure forms a stationary equilibrium with the opposing magnetic fields. The reconnection layer profile holds significant clues about the physical mechanisms which control reconnection. On the Magnetic Reconnection Experiment [M. Yamada et al., Phys. Plasmas 4, 1936 (1997)], a ...