Back to results
US 2022/0157594 A1Published application
Quadrupole devices
AssigneeMicromass UK Limited
InventorsMartin Raymond Green, David J. Langridge
Life of this patent
Estimating the term…
Abstract
A method of operating a quadrupole device (10) is disclosed. A voltage source (12) applies a main quadrupolar voltage, an auxiliary quadrupolar voltage and a dipolar voltage to the quadrupole device (10). This may be done such that only ions corresponding to a single X-band, X-band-like, Y-band or Y-band-like stability region are transmitted by the quadrupole device (10).
Claims20
A method of operating a quadrupole device, the method comprising:
- applying a main AC quadrupolar voltage to the quadrupole device;
- applying an auxiliary AC quadrupolar voltage to the quadrupole device;
- and
- applying an AC dipolar voltage to the quadrupole device.
1 more element
Apparatus comprising:
- a quadrupole device;
- and
- one or more voltage sources configured to:
- apply a main AC quadrupolar voltage to the quadrupole device;
- apply an auxiliary AC quadrupolar voltage to the quadrupole device;
- and
- apply an AC dipolar voltage to the quadrupole device.
4 more elements
Apparatus comprising:
- a quadrupole device;
- and
- one or more voltage sources configured to:
- apply a main quadrupolar voltage to the quadrupole device;
- apply an auxiliary quadrupolar voltage to the quadrupole device;
- and
- apply one or more DC voltages to the quadrupole device;
- wherein the main quadrupolar voltage, the auxiliary quadrupolar voltage and the one or more DC voltages are selected to correspond to operation of the quadrupole device in two or more stability regions simultaneously;
- and
- wherein the apparatus is configured to attenuate ions corresponding to at least one of the two or more stability regions as those ions pass through the quadrupole device.
7 more elements
Dependencies are inferred from the claim text.