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Experimental study of the nonlinear second sound wave interaction in superfluid 4He.

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<mark>Journal publication date</mark>11/2006
<mark>Journal</mark>Journal of Low Temperature Physics
Issue number1-4
Number of pages10
Pages (from-to)155-164
<mark>Original language</mark>English


We report preliminary results of investigations of the nonlinear second sound wave interaction in a high-quality resonator filled with superfluid 4He. The anomalously large nonlinear coefficient of second sound allows us to observe the formation of higher harmonics while pumping the resonator at a resonant frequency and, in this manner, to study wave energy transfer from the low-frequency domain to the high-frequency domain over a wide frequency range. The observed nonequilibrium stationary wave distribution of amplitudes A f for multiple harmonics over wave frequency f may be described as , where s ≥ 1.5.

Bibliographic note

The final publication is available at Springer via http://dx.doi.org/10.1007/s10909-006-9236-2