ROTATING FIELD MASS AND VELOCITY ANALYZER

摘要

A mass and velocity analyzer (48) has a cell (60) having four walls (62, 64, 66, 68) applied with time dependent RF potentials. The time dependent RF potentials create an RF field effectively rotating in the cell (60). The rotating RF field disperses an incident ion beam (46) accelerated into the cell (60) according to the mass-to-charge ratio and velocity distribution of ions (52) in the ion beam (46). The ions (52) of the ion beam (46) either collide with an ion detector (54) or deflect away from the ion detector (54), depending on the mass-to-charge ratio, RF amplitude and RF frequency.