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Fig. 1 | EPJ Techniques and Instrumentation

Fig. 1

From: Optimal beam sources for Stark decelerators in collision experiments: a tutorial review

Fig. 1

Schematic representation of the experimental set-up. A pulsed beam of ND 3 or NO molecules seeded in Ar, Kr or Xe is produced by either a Jordan Valve or a Nijmegen Pulsed Valve and loaded into the Stark decelerator. After passing through this 2.6 meter-long Stark decelerator, of which only the last section is shown, the molecules are detected in the interaction region using Resonance Enhanced Multi Photon Ionization (REMPI). A one-color (2+1) or a two-color (1+1’) REMPI scheme is used to detect ND 3 or NO, respectively. The microchannel plate detector can either be used to record the integral ion signal, or to record the velocity of the molecules using VMI. Molecular beams produced by a Jordan Valve and a Nijmegen Pulsed Valve are available at an angle of 90° and 180° with respect to the Stark decelerator, respectively. Both beams are collimated by a skimmer (s) and a collimator (c). These beams allow for scattering experiments, but in this study they are used to characterize the velocity distribution of the conventional beams

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