A multi-phase correction circuit adjusts the phase relationship among multiple clock signals such that their rising edges are equidistant in time from one another. The transportation system comprises near and far support lines and a cross support line suspended from the near and far support lines. As a result, two independently analyzed discrete flows of particles pass through the ion mass separation chamber of the TOF MS without interference with each other. Each of the analog sections operates in accordance with a corresponding one of the sampling clock signals.