Electromagnetically driven parametric instability in an annular layer |
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Authors: | F. Debray I. Lagarde Y. Fautrelle |
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Affiliation: | (1) IRSID Voie Romaine, BP 320, 57214 Maizieres Les Metz, France;(2) Laboratoire Madylam Enshmg, BP 95, 38402 St Martin D'Heres, France |
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Abstract: | Local measurements of the free surface amplitude of an annular layer of mercury submitted to a low frequency vertical magnetic filed are performed. The results confirm the linear analysis which predicts two types of classical transitions (harmonic and sub-harmonic) and a specific electromagnetic transition occurring with a combination of frequences. |
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Keywords: | free surface instability parametric resonance electromagnetic excitation |
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