The formation of the radial electric field. $E_\textrm{r}$ in the scrape-off layer (SOL) has been experimentally studied for attached divertor conditions in stellarator W7-X. The main objective of this study is to test the validity in a complex three-dimensional (3D) island divertor of simple models. typically developed in tokamaks. https://cuttingedgecutleryco.shop/product-category/pocket-clip/