Ion detector with bipolar accelerating electrode

Details Ion detector with bipolar accelerating electrode Ion detector with bipolar accelerating electrode

1979-06-04

1981-05-12

Anderson, Bruce C.

Radiant energy

Ionic separation or analysis

250283, 250282, B01D 5944

Patent

active

042674484

ABSTRACT:
The ion detector of a mass spectrometer includes an accelerating electrode 10, 34, 38 disposed between the spectrometer discharge shutter 6 and a secondary electron multiplier 18. The electrode 10 is selectively energized by a high positive or negative voltage opposite the initial polarity of the ions by a source 16. Thus, a positively energized electrode draws in and accelerates negative ions, and strips away their electrons to leave them positively charged for further acceleration into the first dynode of the secondary electron multiplier.

REFERENCES:
patent: 3774028 (1973-11-01), Daly
patent: 3898456 (1975-08-01), Dietz

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