| 14 | | Right after the extraction gap of the source is a Wien filter, or ExB filter, or charge/mass (q/m) filter, where crossed electrical and magnetic fields let only ions with a selectable ratio q/m pass. |
| | 14 | Right after the extraction gap of the source is a Wien filter, or ExB filter, or charge/mass (q/m) filter, where crossed electrical and magnetic fields let only ions with a selectable ratio q/m pass. The ions are first focused by an Einzel lens (Einzel 1) into |
| | 15 | the Wien Filter, then after the Filter they are focused again by Einzel 2. |
