Process for determining mass spectrum by time of flight and spec

Details Process for determining mass spectrum by time of flight and spec Process for determining mass spectrum by time of flight and spec

1985-07-30

1987-06-30

Church, Craig E.

Radiant energy

Ionic separation or analysis

Ion beam pulsing means with detector synchronizing means

250423F, H01J 4740

Patent

active

046772952

ABSTRACT:
A process for determining mass spectrum by time of flight, wherein a source comprising a solid surface is subjected to the action of an electric field between this surface and an electrode, this provoking the simultaneous emission of electrons and of negative ions released by spontaneous desorption; the electrons and negative ions are received successively by a detector to determine the mass spectrum as a function of the differences between the instants of reception of the electrons and the negative ions.

REFERENCES:
patent: 3868507 (1975-02-01), Panitz
Andrade et al., Nuclear Instruments and Methods, vol. 21, No. 2, 1974, pp. 359-363.
Nuclear Instruments and Methods, vol. 188, Sep. 1981, pp. 99-104, North-Holland Publishing Comp., Amsterdam, NL; E. Festa et al.: "A Multistop Time-to-Digital Converter" * p. 99; FIG. 1* .
International Journal of Mass Spectroscopy and Ion Physics, vol. 52, No. 2/3, Sep. 1983, pp. 223-240, Elsevier Science Publishers B.V., Amsterdam, NL; H. Danigel et al.: "A 252Cf Fission Fragment-Inducted Desorption Mass Spectrometer: Design, Operation and Performance", * p. 224, lignes 4-7; FIG. 5 * .

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