HOMOGENIZATION OF THE PULSED ELECTRIC FIELD CREATED IN A RING STACK ION ACCELERATOR

摘要

A ring stacked accelerator for use in a mass spectrometer includes a plurality of ring shaped plates arranged in a stack and is electrically coupled to a voltage divider that allows a substantially homogeneous electric field to be produced when the stack is energized. The voltage divider can include resistors and capacitors, where the capacitors are chosen to compensate for parasitic capacitances experienced by the plates. The ring stacked accelerator can be energized using an RF pulse. The ring stack accelerator can include one or more balancing capacitors for correcting effects that cause nonlinearity.

主权项

1. An accelerator for use in a mass spectrometer comprising:
a first plurality of conductive plates arranged in a stack with a gap separating any pair of said plates; a first resistor voltage divider electrically coupled to said plates; one or more capacitors coupled to said plates and configured to allow generating at each plate, in response to application of a voltage pulse across the stack, a voltage pulse having an amplitude that varies substantially linearly from a first plate in said stack to a last plate in said stack; and one or more balancing capacitors for correcting effects that cause nonlinearity.