Fig. 1From: Optimizing the density of Stark decelerated radicals at low final velocities: a tutorial reviewCross section through the pinhole-discharge valve Ref. [42]. The nozzle diameter is 0.5 mm. The thickness of the two discharge plate electrodes is 0.7 mm separated by Macor insulators with a width of 2.3 mm. The gas expands through a conical channel with an opening angle of 60°Back to article page