Figure 7.
Diagram of a typical gas-phase experimental apparatus, including both a molecular beam and a TOF mass spectrometer. The molecular beam interacts with the laser pulses employed in the experiment. For example, for 1 + 1 REMPI, pump, hνpu, and probe, hνpr, laser pulses are necessary, as represented by the red and blue arrows, respectively. The resulting ions are accelerated towards the detector by a set of ion optics. The last section of this set-up consists of a field-free flight tube (see main text), so that ions reach the detector at different times depending on their m/z ratio. (Online version in colour.)