Quadrupole field mass analyser

Details Quadrupole field mass analyser Quadrupole field mass analyser

1974-09-17

1976-01-27

Lawrence, James W.

Radiant energy

Ionic separation or analysis

Cyclically varying ion selecting field means

H01J 3934

Patent

active

039354539

ABSTRACT:
A mass spectrometry apparatus, a quadrupole field mass analyser, is discld together with a novel method of investigating ions in or for mass spectrometry. The apparatus and method employ multiple-channel quadrupole mass filter devices to which the ions are fed via a relatively large entry aperture afforded preferably by a transverseley-split spherical or cylindrical capacitance analyser arranged in conjunction with a stop aperture device to remove ions having energies which are not within a predetermined energy band. The ions are accelerated into the first half of the capacitance analyser, decelerated to pass into the filter devices, and then reaccelerated to the ion detection device.

REFERENCES:
patent: 2939952 (1960-06-01), Paul et al.

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