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RESEARCH PRODUCT
External-ion accumulation in a Penning trap with quadrupole excitation assisted buffer gas cooling
G. DietrichN. KlischSt. BeckerK. LützenkirchenLutz SchweikhardH.-j. KlugeM. LindingerH.-u. HasseJ. Zieglersubject
Range (particle radiation)Ion beamPhysics::Plasma PhysicsChemistryBuffer gasQuadrupolePhysics::Atomic PhysicsIon trapAtomic physicsPenning trapSpectroscopyExcitationIondescription
Abstract A pulsed ion beam from an external source is injected into a Penning trap and accumulated by repeatedly lowering during ion capture to prevent the ions already captured from escaping. For the same reason the newly captured ions have to be cooled, which achieved by buffer gas collisions. To prevent radial on loss, the ions are exposed to azimuthal quadrupole excitation. By choosing the appropriate frequency (range) this method (selective quadrupole excitation assisted capture and centering (SQUEACE) allows a mass selection during the capture process and leads to a centering of those ions in the Penning trap. The multiple ion bunch capture results in a significant improvement in signal-to-noise ratio and a decrease in experiment duration.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1994-04-01 | International Journal of Mass Spectrometry and Ion Processes |