J an 2 00 7 epl draft Magnetic field reversals in an experimental turbulent dynamo

@inproceedings{Berhanu2006JA2,
  title={J an 2 00 7 epl draft Magnetic field reversals in an experimental turbulent dynamo},
  author={Michael Berhanu and Romain Monchaux and St{\'e}phan Fauve and Nicolas Mordant and François P{\'e}tr{\'e}lis and Arnaud Chiffaudel and François Daviaud and B{\'e}reng{\`e}re Dubrulle and Litzler Marie and Florent Ravelet and Mickael Bourgoin and Ph. Odier and Jean-François Pinton and R Scott Volk},
  year={2006}
}
We report the first experimental observation of reversals of a dynamo field generated in a laboratory experiment based on a turbulent flow of liquid sodium. The magnetic field randomly switches between two symmetric solutions B and −B. We observe a hierarchy of time scales similar to the Earth’s magnetic field: the duration of the steady phases is widely distributed, but is always much longer than the time needed to switch polarity. In addition to reversals we report excursions. Both coincide… CONTINUE READING
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