Design of Velocity Map Imaging Spectrometer Equipped with a Mass Gate Discriminating Particular Photofragments

Figure 2

TOF spectra of Kr at ℎ𝜈=91 eV (top) and the relevant timing diagram (bottom). (a) The control experiment by applying a pulse voltage to the repeller (𝑉_𝑅=75 V); (b) the discrimination of Kr²⁺ by the PEX mode. The retarding grid was biased to 80 V, and a 100-V pulsed voltage was applied to the mass gate.