What is known about the structure of $J_{0}(N)$ over $\mathbb{Q}[\mu_{p^{\infty}}]$?

More generally, what do we know about $J_{0}(N)$ over 
$\mathbb{Q}[\mu_{p^{\infty}},k^{1/p^{n}}]$?

I am especially interested in the case where $N$ is the conductor of an elliptic curve with additive reduction at $p$.