The present disclosure relates to a device for filtering at least one selected ion from an ion beam includes a unit for creating an electric field for accelerating the ions of the ion beam along a flight path of predefinable length, and a controllable ion optical system, which delimits the flight path in one direction, and which is used to deflect the selected ion from a flight path of the ion beam. The device is further designed to control the ion optical system subject to a flight time of the selected ion along the flight path. The present disclosure also relates to a mass spectrometer having a device according to the present disclosure, and to a method for filtering at least one selected ion from an ion beam.

The present disclosure relates to a device for filtering at least one selected ion from an ion beam includes a unit for creating an electric field for accelerating the ions of the ion beam along a flight path of predefinable length, and a controllable ion optical system, which delimits the flight path in one direction, and which is used to deflect the selected ion from a flight path of the ion beam. The device is further designed to control the ion optical system subject to a flight time of the selected ion along the flight path. The present disclosure also relates to a mass spectrometer having a device according to the present disclosure, and to a method for filtering at least one selected ion from an ion beam.

The ion trap comprises a multipole electrode assembly, a first confining electrode, and a second confining electrode. The multipole electrode assembly is configured to confine ions of the first polarity to an ion channel extending in an axial direction of the multipole electrode assembly. The first confining electrode is provided adjacent to the multipole electrode assembly and extends in the axial direction of the multipole electrode assembly. The second confining electrode is provided adjacent to the multipole electrode assembly and extends in the axial direction of the multipole electrode assembly aligned with the first confining electrode. The first and second confining electrodes are spaced apart in the axial direction in order to define an ion confining region of the ion channel between the first and second confining electrodes. The first and second confining electrodes are configured to receive a DC potential of the first polarity to further confine ions within the ion channel in the ion confining region.

The ion trap comprises a multipole electrode assembly, a first confining electrode, and a second confining electrode. The multipole electrode assembly is configured to confine ions of the first polarity to an ion channel extending in an axial direction of the multipole electrode assembly. The first confining electrode is provided adjacent to the multipole electrode assembly and extends in the axial direction of the multipole electrode assembly. The second confining electrode is provided adjacent to the multipole electrode assembly and extends in the axial direction of the multipole electrode assembly aligned with the first confining electrode. The first and second confining electrodes are spaced apart in the axial direction in order to define an ion confining region of the ion channel between the first and second confining electrodes. The first and second confining electrodes are configured to receive a DC potential of the first polarity to further confine ions within the ion channel in the ion confining region.

A dissociation device fragments a precursor ion, producing at least two different product ions with overlapping m/z values in the dissociation device. The dissociation device applies an AC voltage and a DC voltage creating a pseudopotential that traps ions below a threshold m/z including the at least two product ions. The dissociation device receives a charge reducing reagent that causes the trapped at least two product ions to be charge reduced until their m/z values increase above the threshold m/z set by the AC voltage. The increase in the m/z values of the at least two product ions decreases their overlap. The at least two product ions with increased m/z values are transmitted to another device for subsequent mass analysis by applying the DC voltage to the dissociation device relative to a DC voltage applied to the other device.

A dissociation device fragments a precursor ion, producing at least two different product ions with overlapping m/z values in the dissociation device. The dissociation device applies an AC voltage and a DC voltage creating a pseudopotential that traps ions below a threshold m/z including the at least two product ions. The dissociation device receives a charge reducing reagent that causes the trapped at least two product ions to be charge reduced until their m/z values increase above the threshold m/z set by the AC voltage. The increase in the m/z values of the at least two product ions decreases their overlap. The at least two product ions with increased m/z values are transmitted to another device for subsequent mass analysis by applying the DC voltage to the dissociation device relative to a DC voltage applied to the other device.

Disclosed is an electron beam emission device comprising a housing which defines a space in which electron beams are accelerated, and has an opening at the other side thereof through which the electron beams are emitted; a cathode which is disposed at one side in the housing, and emits the electrons; an anode which is positioned in the housing so as to be spaced apart from the cathode toward the other side, and accelerates the electrons emitted from the cathode; and an insulation holder which insulates a portion between the cathode and the housing, and fixes the cathode, wherein the cathode has a surface which faces the anode and is formed concavely to have a gradient, and a rim of the surface of the cathode, which has the gradient, is formed to be rounded.

Disclosed is an electron beam emission device comprising a housing which defines a space in which electron beams are accelerated, and has an opening at the other side thereof through which the electron beams are emitted; a cathode which is disposed at one side in the housing, and emits the electrons; an anode which is positioned in the housing so as to be spaced apart from the cathode toward the other side, and accelerates the electrons emitted from the cathode; and an insulation holder which insulates a portion between the cathode and the housing, and fixes the cathode, wherein the cathode has a surface which faces the anode and is formed concavely to have a gradient, and a rim of the surface of the cathode, which has the gradient, is formed to be rounded.

The present disclosure relates to a device for filtering at least one selected ion from an ion beam includes a unit for creating an electric field for accelerating the ions of the ion beam along a flight path of predefinable length, and a controllable ion optical system, which delimits the flight path in one direction, and which is used to deflect the selected ion from a flight path of the ion beam. The device is further designed to control the ion optical system subject to a flight time of the selected ion along the flight path. The present disclosure also relates to a mass spectrometer having a device according to the present disclosure, and to a method for filtering at least one selected ion from an ion beam.

The ion trap comprises a multipole electrode assembly, a first confining electrode, and a second confining electrode. The multipole electrode assembly is configured to confine ions of the first polarity to an ion channel extending in an axial direction of the multipole electrode assembly. The first confining electrode is provided adjacent to the multipole electrode assembly and extends in the axial direction of the multipole electrode assembly. The second confining electrode is provided adjacent to the multipole electrode assembly and extends in the axial direction of the multipole electrode assembly aligned with the first confining electrode. The first and second confining electrodes are spaced apart in the axial direction in order to define an ion confining region of the ion channel between the first and second confining electrodes. The first and second confining electrodes are configured to receive a DC potential of the first polarity to further confine ions within the ion channel in the ion confining region.