Ion storage device

Details Ion storage device Ion storage device

1991-05-07

1992-06-09

Berman, Jack I.

Radiant energy

Ionic separation or analysis

Cyclically varying ion selecting field means

250281, 250282, 250283, 250286, 250287, H01J 4940

Patent

active

051209586

ABSTRACT:
An ion-storage device has an electrode structure for subjecting ions in a defined region along a path P to an electrostatic retarding field.
The electrostatic retarding field is in the form of an electrostatic quadrupole field. Ions enter the defined region at a position P.sub.1 on the path and they exit the defined region at a position P.sub.2, having travelled a distance x.sub.T. Ions are subjected to the electrostatic retarding field during an initial part only of a preset time interval and the velocity of each ion during that part of the preset time interval is related linearly to its separation x from the exit position P.sub.2 by the expression, ##EQU1## where m is the mass of the ion, q is its charge and k is a constant. Ions having the same mass-to-charge ratio (m/q) all exit the field region at the same time during the remaining part of the preset time interval.

REFERENCES:
patent: 2780728 (1957-02-01), Langmuir
patent: 2790080 (1957-04-01), Wells
patent: 2839687 (1958-06-01), Wiley
patent: 3582648 (1971-06-01), Anderson
patent: 3727047 (1973-04-01), Janes
patent: 3953732 (1976-04-01), Oron et al.
patent: 4072862 (1978-02-01), Mamyrin et al.

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