| CPC H01J 49/4275 (2013.01) [H01J 49/4235 (2013.01)] | 23 Claims |

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1. A voltage control system comprising:
a controller, configured to:
identify one or more compensation electrodes from a plurality of compensation electrodes of an ion movement control system;
select one or more compensation voltages for the one or more compensation electrodes;
control a voltage source to provide a first compensation voltage of the one or more compensation voltages; and
control one or more switches of a plurality of switches to connect the one or more compensation electrodes to the voltage source.
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