Trapping within the analyzer cell is achieved through a combination of magnetic and electric
fields. Ions enter the cell and experience the strong magnetic field, which traps them in the
radial direction and induces cyclotron motion. In order to prevent the ions from moving freely
in the axial direction out of the cell, a small electric potential is applied to two trapping
electrodes at either end of the trap. This confines the ions within the cell, where they could
theoretically be stored indefinitely