Patent ID: 11929246
Assignee: DH TECHNOLOGIES DEVELOPMENT PTE. LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A mass analyzer, comprising:
a quadrupole having an input end for receiving ions and an output end through which ions can exit the quadrupole, said quadrupole having a plurality of rods to at least some of which an RF voltage can be applied for generating a quadrupolar field for causing radial confinement of the ions as they propagate through the quadrupole and further generating fringing fields in proximity of said output end,
at least one voltage source for applying said RF confinement voltage to said rods, said at least one voltage source further being configured for applying an excitation signal to at least one of said rods for exciting radial oscillations of at least a portion of the ions passing through the quadrupole at secular frequencies thereof, wherein the radially-excited ions interact with the fringing fields to exit the quadrupole such that their radial oscillations are converted into axial oscillations,
a detector for detecting said ions exiting the quadrupole in response to a data acquisition trigger provided by said at least one voltage source,
a controller in communication with said at least one voltage source to configure said at least one voltage source such that said RF confinement voltage, said excitation signal and said data acquisition trigger signal are phase locked.