Methods and structures to produce electrostatic quadrupole field

Details Methods and structures to produce electrostatic quadrupole field Methods and structures to produce electrostatic quadrupole field

1986-03-13

1987-11-03

Fields, Carolyn E.

Radiant energy

Ionic separation or analysis

Cyclically varying ion selecting field means

250290, 250281, 250396R, H01J 4942

Patent

active

047045329

ABSTRACT:
The invention includes a method for obtaining an exact electrostatic quadrupole field by the use of simple structures having high resistance materials of uniform or continuously varied thickness to form closed boundaries. The potential of these boundaries is continuously varied with respect to position in accordance with specified design criteria. The method and structures can be used in electron optical systems and related scientific instruments.

REFERENCES:
patent: 3937954 (1976-02-01), Fite
patent: 4126781 (1978-11-01), Siegel
P. H. Dawson, "Radiofrequency Quadrupole Mass Spectrometers", Advance in Electronics and Electron Physics, 1980, pp. 173-256.
C. Y. Hua, "New Possibilities to Prepare Enriched Isotope Targets", Nuclear Instruments and Methods, 1979, pp. 101-107.
Q. X. Jiang, "Calculation of Multiline and Multileaf Electrode Systems", Vacuum Science and Technology, 1981, pp. 151-162.

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