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AssigneeBruker Daltonik GmbH
InventorsOliver Rather, Karsten Michelmann, Jochen Franzen
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In a mass spectrometer a target volume is filled with ions of different mass but substantially the same energy from a distant storage device by forming a plurality of spatially-limited ion swarms consisting of ions having the same mass. The ion swarms are ordered either by a mass-sequential extraction from the storage device or by rearranging the order of flight as the ions are in flight, so that swarms of different mass ions simultaneously enter the target volume despite having different flight velocities. A mass-sequential extraction in the order of decreasing mass can be achieved in one embodiment by decreasing a pseudopotential barrier at the storage device which causes the heavy ions to emerge first. In another embodiment, the ions can be rearranged in flight by applying a bunching potential. A second reverse bunching potential then restores the energy of the ions to their original values.
A method for filling a target volume from a distant storage device with ions having different masses, but substantially equal energies, comprising:
A time-of-flight mass spectrometer with orthogonal ion injection having a storage device for ions and a pulser that is filled with ions from the storage device, comprising:
A ion cyclotron resonance mass spectrometer having a storage device for ions and a measuring cell that is filled with ions from the storage device, comprising:
A mass spectrometer having a storage device for ions and an electrostatic ion trap that is filled with ions from the storage device, comprising:
A storage device for the storage of ions that are to be dispatched to a target volume, comprising:
Dependencies are inferred from the claim text.