Simultaneous detection type mass spectrometer

Details Simultaneous detection type mass spectrometer Simultaneous detection type mass spectrometer

1991-03-18

1992-04-21

Berman, Jack I.

Radiant energy

Ionic separation or analysis

Static field-type ion path-bending selecting means

250298, 250296, 250294, 250281, H01J 4928

Patent

active

051071100

ABSTRACT:
There is disclosed a mass spectrometer which is equipped with a simultaneous detection-type ion detector including a microchannel plate but provides improved sensitivity. The spectrometer has an ion source, a mass analyzer for dispersing and focusing the ions introduced from the source according to their mass-to-charge ratios, three electrodes each taking the form of a flat plate, as well as the detector. The electrodes are disposed on the ion path between the mass analyzer and the detector. The electrodes produce a focusing action not in the direction in which the ions are dispersed according to their mass-to-charge ratios but in the direction perpendicular to that direction. The electrodes are spaced from each other in the direction in which the ions travel. Each electrode is provided with a rectangular hole to pass the ions. The dimension of this hole taken in the direction in which the ions are dispersed is sufficiently longer than the dimension taken in the direction perpendicular to that direction.

REFERENCES:
patent: 4435642 (1984-03-01), Neugebauer et al.
patent: 4472631 (1984-09-01), Enke et al.
patent: 4638160 (1987-01-01), Slodzian et al.
patent: 4924090 (1990-05-01), Wollnik et al.
patent: 4998015 (1991-03-01), Ishihara
patent: 5013923 (1991-05-01), Litherland et al.

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