Micro-fourier transform ion cyclotron resonance mass spectromete

Details Micro-fourier transform ion cyclotron resonance mass spectromete Micro-fourier transform ion cyclotron resonance mass spectromete

1994-12-06

1995-10-03

Berman, Jack I.

Radiant energy

Ionic separation or analysis

Cyclically varying ion selecting field means

250281, H01J 4938

Patent

active

054554187

ABSTRACT:
A mass spectrometer having a tube permeable to a magnetic flux, preferably glass, and having an exterior surface and an interior surface, the tube having a pair of opposing excite electrodes and a pair of opposing detect electrodes disposed at the interior surface, a pair of spaced apart magnets disposed on the exterior surface of the tube, the excite electrodes and the detect electrodes being disposed at least in part between the pair of magnets, an evacuatable chamber containing the tube and magnets and a pump to evacuate the evacuatable chamber. The excite electrodes are disposed in a first pair of opposing quadrants and the detect electrodes are disposed in a second pair of opposing quadrants, the excite electrodes being parallel to each other and the detect electrodes being substantially parallel to each other and substantially normal to the excite electrodes. The magnets are rare earth magnets, preferably cobalt rare earth magnets or sumarium cobalt rare earth magnets. The mass spectrometer further including plural conductors, one conductor for each excite electrode, each trap electrode and each detect electrode, each conductor extending through the tube to a different one of the excite electrodes and detect electrodes, for applying a sweep signal to the excite electrodes and detecting one of a voltage or current across the detect electrodes.

REFERENCES:
patent: 5019706 (1991-05-01), Allemann et al.

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