Radiant energy – Ionic separation or analysis
Patent
1989-08-21
1991-01-29
Berman, Jack I.
Radiant energy
Ionic separation or analysis
250282, 250427, 3133621, 3133631, H01J 4926
Patent
active
049888692
ABSTRACT:
A tandem mass spectrometer includes an ion source, a first mass analyzer, a second mass analyzer, and a detector. An electron focusing source is provided between the first mass analyzer and the second mass analyzer in order to provide for dissociation of a parent ion beam into a plurality of daughter ion beams. In a first embodiment, the focused electron source comprises a cylindrical cathode having a concentric cylindrical anode in its interior. Control of the cathode temperature and the potential between the cathode and the anode provides a desired electron flux along the axis of the source. The second embodiment, the desired electron flux is provided by a field emission electrode.
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Berman Jack I.
The Regents of the University of California
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