Fig. 3

Schematic representation of the relevant distances in the experiment (a) together with a schematic representation of the trigger scheme (b) needed to synchronize the experiment. c Arrival time distribution of ND ₃ seeded in Kr at the detector, when the beam propagates in free flight from the source to the detector. Time-of-flight (TOF) distribution and Incouple Time Scan (ITS) when this beam is guided at constant speed (d) or decelerated (e). See text for details