Ion and electron detector for use in an ICR spectrometer

Details Ion and electron detector for use in an ICR spectrometer Ion and electron detector for use in an ICR spectrometer

1974-08-27

1976-10-05

Lawrence, James W.

Radiant energy

Ionic separation or analysis

Cyclically varying ion selecting field means

250290, H01J 3946

Patent

active

039846814

ABSTRACT:
A detector for detecting ions and/or electrons present in a resonance cell of an ICR spectrometer is disclosed. The detector which operates on the Q-meter principle is driven by an external rf oscillator capable of providing rf frequencies up to about 15MHz at an adjustable low rf signal level, e.g., below 20mV. The detector is connected across the resonance of the cell to detect ions by detecting their cyclotron frequency. Electrons are detectable by connecting the detector across the cell's trapping plates and thereby detect the electrons' trapping motion, the frequency of which is in the megahertz range.

REFERENCES:
patent: 3475605 (1969-10-01), Llewellyn
patent: 3484602 (1965-12-01), McIlraith
patent: 3511986 (1970-05-01), Llewellyn

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