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Jim Fuller edited Mode Visibility.tex
almost 9 years ago
Commit id: 7c32532158521511b9eaa1f0f0a62841ecaf9b49
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where $r_1$ and $r_2$ are the lower and upper boundaries of the evanescent zone, respectively. For waves of the same frequency, larger values of $\ell$ have larger values of $r_2$, thus equation \ref{eqn:integral2} demonstrates that high $\ell$ waves have much smaller transmission coefficients through the evanescent zone. The fraction of wave energy transmitted through the evanescent zone is $T^2$.
%while the fraction of reflected energy is $R^2=1-T^2$.
To estimate the reduced mode visibility due to energy loss in the core, we assume any mode energy which leaks into the
g-mode g mode cavity is completely lost. The
rate at which mode
loses a fraction $T^2$ of its energy
leaks into the core depends on the transmission coefficient through the evanescent region ($T$) and in a time $2 t_{\rm cross}$, where $t_{\rm cross}$ is the wave crossing time
$t_{\rm cross}$ across of the acoustic cavity. We show (see Supplementary Material) that the ratio of visibility between a suppressed mode and its non-suppressed counterpart is
\begin{equation}
\label{eqn:vis}
\frac{V_{\rm sup}^2}{V_\alpha^2} = \bigg[1 + \Delta \nu \tau_{0} T^2 \bigg]^{-1} \, ,