Experimental evidence of a zonal magnetic field in a toroidal plasma.
نویسندگان
چکیده
A zonal magnetic field is found in a toroidal plasma. The magnetic field has a symmetric bandlike structure, which is uniform in the toroidal and poloidal directions and varies radially with a finite wavelength of mesoscale, which is analogous to zonal flows. A time-dependent bicoherence analysis reveals that the magnetic field should be generated by the background plasma turbulence. The discovery is classified as a new kind of phenomenon of structured magnetic field generation, giving insight into phenomena such as dipole field generation in rotational planets.
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عنوان ژورنال:
- Physical review letters
دوره 98 16 شماره
صفحات -
تاریخ انتشار 2007