Multi-reflecting time of flight mass analyser
AssigneeMicromass UK Limited
InventorsBoris Kozlov, Irina Vasileva
Life of this patent
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Abstract
A mass spectrometer comprising: an ion energy filter 14 arranged and configured to filter ions according to their kinetic energy and so as to only transmit ions having a component of kinetic energy in a first dimension (z-dimension) that is within a selected range; and a multi-reflecting time of flight mass analyser or mass separator 1 having an ion accelerator 6, and two gridless ion mirrors 2 that are elongated in the first dimension (z-dimension) and configured to reflect ions multiple times in a second orthogonal dimension (x-dimension), wherein the ion accelerator 6 is arranged to receive ions from the energy filter 14 and accelerate the ions into one of the ion mirrors 2.
Claims18
A mass spectrometer comprising:
- an ion energy filter arranged and configured to filter ions according to their kinetic energy and so as to only transmit ions having a component of kinetic energy in a first dimension (z-dimension) that is within a selected range;
- and
- a multi-reflecting time of flight mass analyser or mass separator having an ion accelerator, and two gridless ion mirrors that are elongated in the first dimension (z-dimension) and configured to reflect ions multiple times in a second orthogonal dimension (x-dimension), wherein the ion accelerator is arranged to receive ions from the energy filter and accelerate the ions into one of the ion mirrors;
- wherein the energy filter is configured to only transmit ions having a kinetic energy spread, in the first dimension (z-dimension), of ≤5 eV.
A mass spectrometer comprising:
- an ion energy filter arranged and configured to filter ions according to their kinetic energy and so as to only transmit ions having a component of kinetic energy in a first dimension (z-dimension) that is within a selected range;
- and
- a multi-reflecting time of flight mass analyser or mass separator having an ion accelerator, and two gridless ion mirrors that are elongated in the first dimension (z-dimension) and configured to reflect ions multiple times in a second orthogonal dimension (x-dimension), wherein the ion accelerator is arranged to receive ions from the energy filter and accelerate the ions into one of the ion mirrors;
- wherein the energy filter comprises an ion entrance, an ion exit, and at least two axially spaced electrodes arranged therebetween, wherein the energy filter is configured to arrange a potential difference between the electrodes that urges ions in a direction from the ion exit to the ion entrance for filtering the ions according to their kinetic energy.
Dependencies are inferred from the claim text.