Ion drift detector

Details Ion drift detector Ion drift detector

1987-01-27

1989-05-16

Anderson, Bruce C.

Radiant energy

Ionic separation or analysis

Ion beam pulsing means with detector synchronizing means

250286, B01D 5944

Patent

active

048312541

ABSTRACT:
An ion drift detector comprising an electrically insulating cylindrical tube. A means is provided for establishing along the tube a laminar flow of air into which heavier than air molecules, whose presence is to be detected, can be introduced. An ionizing means is disposed at a location on the central longitudinal axis of the tube for ionizing at least some of the molecules in the laminar flow. Disposed in the tube at a location downstream of the ionizing means there is provided a means for establishing a radial electric field extending across the space between the longitudinal axis and the wall of the tube, such that the ions formed on the axis of the tube are caused to be drifted generally radially across the laminar flow of air under the influence of the radial electric field. The tube also contains an ion collector arrangement which can detect the arrival of ions at different regions along the length of the tube, so that lighter and heavier ions can be distinguished by the extent of longitudinal travel along the cylindrical tube before the ions reach the wall of the tube.

REFERENCES:
patent: 3986111 (1976-10-01), Sellers
patent: 4023398 (1977-05-01), French et al.
patent: 4271357 (1981-06-01), Bradshaw et al.
patent: 4390784 (1983-06-01), Browning et al.

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