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Analysis of First,Second, and Fourth Sound Modes in a Helium 4 Superfluid
  • Chris Spencer
Chris Spencer
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First,second,and fourth sound were successfully found and plotted. Graphs show a lack of steepness in decay as sound modes approach \(T_{\lambda}\), this could be due to refilling liquid helium later than recommended leaving less medium for the sound modes to propogate through. Scattering factor,n, was found to be n=1.239 ± .007 and porosity,P, was found to be 0.46 ± 0.02 close to the theoretical value of \(\approx 40 \%\) porosity.