Mass spectrometers

Details Mass spectrometers Mass spectrometers

1974-08-02

1976-02-24

Church, Craig E.

Radiant energy

Ionic separation or analysis

Cyclically varying ion selecting field means

250423, H01J 3934, H01J 3708

Patent

active

039406164

ABSTRACT:
A mass spectrometer has an ion source in having two nested frusto-conical members between the narrow ends of which the splayed out end of an inlet pipe is disposed. The inner frusto-conical member is of mesh form and its wide end leads to the inlet of an ion filter. R.f. and d.c. are applied between the frusto-conical members. The ion filter has four elongate hyperbolic plates of conductive material supported within a tubular ceramics support member. The elongate hyperbolic plates are symmetrical with respect to an axis towards which they project and define a passage within the support member. The outlet of the filter leads to an ion detector.

REFERENCES:
patent: 3639757 (1972-02-01), Caroll

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