Mass spectrometer
AssigneeShimadzu Corporation
InventorKazuo Mukaibatake
Life of this patent
Estimating the term…
Abstract
Disclosed is a mass spectrometer, which includes an ion optical system for converging ions and transporting the ions to a subsequent stage. Instead of a conventional rod-shaped electrode, the ion optical system includes an electrode formed of a thin metal plate member. Specifically, each of four electrodes 41a to 41d formed of the metal plate members has an edge surface facing an ion optical axis C and extends along the ion optical axis C. Further, the electrodes 41a to 41d are disposed around the ion optical axis C in a radial pattern while keeping an angle of 90° between the adjacent electrodes. The present invention can provide the ion optical system at a lower cost.
Claims12
A mass spectrometer comprising:
- an ion source for ionizing sample atoms or molecules;
- a mass separator section for separating ions on a mass number basis;
- and
- an ion optical system disposed on an ion transit path between said ion source and said mass separator section and adapted to form a high-frequency electric field and/or an electrostatic field so as to converge ions and transport the ions to a subsequent stage, said ion optical system including a number n of metal plate members each serving as an electrode (wherein n is an even number of four or more), each of said metal plate members being disposed to extend along an ion optical axis, in such a manner that respective thin edge surfaces of said metal plate members face and surround said ion optical axis,
- wherein each of said metal plate members constituting said ion optical system is disposed such that the edge surface thereof facing the ion optical axis is inclined to come close to or get away from said ion optical axis toward a traveling direction of the ions.
A mass spectrometer comprising:
- an ion source for ionizing sample atoms or molecules;
- a mass separator section for separating ions on a mass number basis;
- and
- an ion optical system disposed on an ion transit path between said ion source and said mass separator section and adapted to form a high-frequency electric field and/or an electrostatic field so as to converge ions and transport the ions to a subsequent stage, said ion optical system including a number n of metal plate members each serving as an electrode (wherein n is an even number of four or more), each of said metal plate members being disposed to extend along an ion optical axis, in such a manner that respective thin edge surfaces of said metal plate members face and surround said ion optical axis,
- wherein each of said metal plate members constituting said ion optical system is disposed such that the edge surface thereof facing the ion optical axis is angled toward and away from said ion optical axis in adjacent portions of said metal plate members relative to a traveling direction of the ions.
Dependencies are inferred from the claim text.