\begin{table}%t2 \caption{\label{parameters}Parameters adopted in the radio halo simulation.} %\centering \par \begin{tabular}{c c c } \hline\hline Parameter & Value & Description \\ \hline $\langle B_0\rangle$ &{\it free} & magnetic field strength at the cluster center\\ $\eta$ &0.47 & magnetic field radial decrease, $\langle B(r)\rangle=\langle B_0\rangle\left(\frac{n_{\rm e}(r)}{n_{\rm e}(0)}\right)^{\eta}$\\ $n$ &11/3 & magnetic field power spectrum index, $|B_k|^2 \propto k^{-n}$\\ $\Lambda_{\rm min}$ &4~kpc & minimum scale of fluctuation, $\Lambda_{\rm min}=2\pi/k_{\rm max}$\\ $\Lambda_{\rm max}$ &{\it free} & maximum scale of fluctuation, $\Lambda_{\rm max}=2\pi/k_{\rm min}$\\ $\gamma_{\rm min}$ &100 & minimum relativistic electron Lorentz factor\\ $\gamma_{\rm max}$ &$+\infty$ & maximum relativistic electron Lorentz factor\\ $\delta$ &3 & power-law index of the energy spectrum of the relativistic electrons \\ \par \hline \end{tabular} \vspace*{2.5mm} \end{table}