Figure 3
(Top) A top view of a triangular split electrode for electron detection. (Bottom) A top view of a linear split electrode for ion detection, with the aperture in the central part which enables the transmission of a fraction of the ions towards the commercial open electron multiplier. Blue arrows represent the direction of the FEL beam. Red rectangles indicate the sensitive area in the respective extraction electrode which can be hit by charged particles, defined by the rectangular aperture. |