AN ION DETECTOR FOR IMAGING 2-DIMENSIONAL VELOCITY DISTRIBUTIONS

The design and performance of a novel ion detector is described. The detector produces a two-dimensional image which displays the time-of-flight distribution of a pulsed packet of ions. Pulse sequencing within the detector allows for simultaneous mass and velocity resolution of the detected ions. The image capturing hardware combines long-term signal integration with single-ion detection in order to provide a wide dynamic range in ion sensitivity.