Non-linear field reflectron

Details Non-linear field reflectron Non-linear field reflectron

1993-10-01

1995-11-07

Berman, Jack I.

Radiant energy

With charged particle beam deflection or focussing

Magnetic lens

250287, H01J 4940

Patent

active

054649854

ABSTRACT:
A reflectron capable of focusing an entire mass range of product ions at substantially the same focal point, comprising a plurality of lens plates, each having an opening therein, for generating a non-linear electric field in the reflectron. To generate the non-linear electric field, the voltage applied to each successive lens plate increases non-linearly with respect to its adjacent lens plate. The voltage of the first lens plate having the opening through which the ions first enter the reflectron is set to a low potential and the voltage being applied to each successive lens plate increases in a non-linear manner with the largest voltage being applied to the lens plate furthest from the first lens plate. This non-linear voltage application, to generate the non-linear electric field, can be achieved by coupling a potentiometer between each lens plate and adjusting each potentiometer accordingly. Alternatively, to generate the non-linear electric field, the lens plates may be unequally spaced and an equal voltage may be applied to each lens plate.

REFERENCES:
patent: 5168168 (1992-12-01), McComas et al.
patent: 5300774 (1994-04-01), Buttrill, Jr.
Cornish T. J. and Cotter, R. J., A Curved-field Reflectron for Improved Energy Focusing of Product Ions in Time-of-flight Mass Spectrometry; Rapid Communications in Mass Spectrometry, vol. 7, 1037-1040 (1993).
Shey, K. L. et al., Int. J. Mass Spectrom. Ion Processes (1989), "Ion/Surface Collision Phenomena in an Improved Tandem Time-of-Flight Instrument," vol. 94, pp. 1-14.
Weinkauf, R. et al., Int. J. Mass Spectrom. Ion Proceses, "Laser Tandem Mass Spectrometry in a Time of Flight Instrument," vol. 44a, (1989), pp. 1219-1225.
Wiley, W. C., McLaren, I. H., Rev. Sci. Instrumen. (1955) vol. 26, pp. 1150 to 1157.
Holland, J. F. et al., J. T. Anal. Chem (1983) vol. 55, p. 497A.
Mamyrin, B. A. et al., Sov. Phys. JETP (1973) vol. 37, p. 45.
Tang, X. et al., Int. J. Mass Spectrom. Ion Processes (1988) vol. 85, p. 43.
Grix, R. et al., Rapid Commun. Mass Spectrom, (1988) vol. 2, p. 83.
Della-Negra, S. et al., Anal. Chem. (1985) vol. 57, p. 2035.
Standing, K. G. et al., Anal. Instrumen. (1987) vol. 16, p. 173.
Spengler, B. et al., Rapid Commun. Mass Spectrom, (1992), vol. 6, p. 105.
Jardine, D. R. et al., Org. Mass. Spectrom, (1992) vol. 27, pp. 1077-1083.
Schey, K. L. et al., Int. J. Mass Spectrom. Ion Processes (1987) vol. 77, pp. 49-61.
Strobel, F. H. et al., J. Am. Soc. Mass Spectrom. (1990), vol. 2, pp. 91-94.
Strobel, F. H. et al., Anal. Chem. (1992), vol. 64, pp. 754-762.
Cornish, T. J., Cotter, R. J., Anal. Chem. (1993) vol. 65, p. 1043.
Cornish, R. J., Cotter, R. J., Org. Mass Spectrom (in press).

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