The Weibel Instability in Electron-Positron Plasma Reconnection

Details The Weibel Instability in Electron-Positron Plasma Reconnection The Weibel Instability in Electron-Positron Plasma Reconnection

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007agufmsh44a1717l&link_type=abstract

American Geophysical Union, Fall Meeting 2007, abstract #SH44A-1717

Physics

2723 Magnetic Reconnection (7526, 7835), 7526 Magnetic Reconnection (2723, 7835), 7829 Kinetic Waves And Instabilities, 7835 Magnetic Reconnection (2723, 7526)

Scientific paper

Full particle simulations of magnetic reconnection reveal the development of turbulence in the outflow jet during magnetic reconnection in pair plasma. This turbulence facilitates fast reconnection by opening the outflow nozzle, thereby shortening the current layer. We demonstrate that the temperature anisotropy that develops in the outflow plasma is the driver for this turbulence. Using particle simulations and analytic theory we explore the behavior of the Weibel-like instability that grows within a narrow current layer with anisotropic temperature - a geometry designed to mimic the current layers seen in electron-positron reconnection. The theoretically predicted wavelength and growth rate explain the structure of the observed turbulence and determine the length of the outflow nozzle seen in reconnection simulations.

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