Figure 8.

A sequence of helical zippettes for zipper reconnection in an arcade containing an initial flux rope and consisting of $N=4$ flux tubes. In the initial state (a) all flux tubes (thick solid lines) are parallel, connecting sources $A_{+}\to A_{-}$, etc. These overlie the pre-existing flux rope $Z$ connecting $Z_{+}\to Z_{-}$. The reconnection sequence consists of three individual reconnection events (b) – (d). The overlying twisted flux tube is designated $R$, and the reconnected arcade tube generated in reconnection event $n$ is designated with that number, i.e. 1, 2, or 3.