Mass spectrometer
AssigneeDr. Franzen Analysentechnik GmbH & Co. Kommanditgesellschaft
InventorsJochen Franzen, Gerhard Weiss
Life of this patent
Estimating the term…
Abstract
A mass spectrometer, including an ion source, a mass filter and at least one ion detector, wherein the mass filter and ion detector are not arranged in alignment but are laterally staggered. Between the mass filter and the ion detector, there is arranged an elongated electrostatic, essentially cylinder-shaped, radial guide field. This guide field guides the ions with a velocity component which extends axially to the guide field in elliptical helical paths about its axis toward the input of the ion detector.
Claims11
A mass spectrometer, comprising:
- an ion source;
- a mass filter having an axis;
- at least one ion detector;
- said mass filter and said ion detector being arranged not in alignment but laterally staggered to each other;
- and
- a metal wire for the generation of an elongated electrostatic, essentially cylindrical, radial guide field extending between said mass filter and said ion detector, which guide field guides ions with a velocity component extending axially to the guide field into elliptic helical paths about its axis toward the input of said ion detector, said metal wire essentially extending between said mass filter and said ion detector, said wire being charged with a charge opposite to ions to be examined, said wire being fastened by clamping only on one side and, on its free end, being bent toward said mass filter in the direction of said axis of said mass filter.
A mass spectrometer, comprising:
- an ion source;
- a mass filter;
- at least on ion detector;
- said mass filter and said ion detector being arranged not in alignment but laterally staggered to each other;
- a metal wire for the generation of an elongated electrostatic, essentially cylindrical, radial guide field extending between said mass filter and said ion detector, which guide field guides ions with a velocity component extending axially to the guide field into elliptical helical paths about its axis toward the input of said ion detector, said metal wire essentially extending between said mass filter and said ion detector, said wire being charged with a charge opposite to ions to be examined, said wire being fastened by clamping only on one side;
- and
- a pusher plate being arranged opposite the free end of the wire in the region where the ions to be examined enter said guide field essentially perpendicular to said axis of said guide field, said pusher plate having a voltage which repels the ions to be examined.
A mass spectrometer, comprising:
- an ion source;
- a mass filter;
- at least one ion detector;
- said mass filter and said ion detector being arranged not in alignment but laterally staggered to each other;
- and
- an electrically biased metal wire having two conducting portions for the generation of an elongated electrostatic, essentially cylindrical, radial guide field extending between said mass filter and said ion detector, which guide field guides ions with a velocity component extending axially to the guide field into elliptic helical paths about its axis toward the input of said detector, at least two ion detectors being arranged staggered relative to said mass filter and said mass filter being connected to each detector through an elongated guide field, said wire being provided between said mass filter and each of said ion detectors, wherein said conducting portions of said wire are insulated from one another and wherein voltages of different signs are applied to said conducting portions.
Dependencies are inferred from the claim text.