Radiant energy – Ionic separation or analysis – With sample supply means
Patent
1991-01-10
1993-02-02
Anderson, Bruce C.
Radiant energy
Ionic separation or analysis
With sample supply means
250423R, H01J 3708, H01J 4926
Patent
active
051840162
ABSTRACT:
The invention provides glow discharge optical or mass spectrometers wherein a solid sample may be mounted in a unitary source assembly adjacent to a first electrode means. A second electrode means, spaced from sample by an insulating washer, is also part of the source assembly and engages with a discharge chamber into which a discharge gas is introduced. A glow discharge is maintained in the discharge by a potential differential difference applied between the first and second electrode means. In a mass spectrometer, ions formed in the discharge pass to a mass analyzer, while in an optical spectrometer, optical radiation form the discharge is spectroscopically analyzed. Particularly in the case of a mass spectrometer, the source assembly may be mounted on an insertion probe allowing it to be easily withdrawn from the vacuum envelope to facilitate sample changing and maintenance.
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Cole Alistair
Ronan Gerard A.
Anderson Bruce C.
VG Instruments Group Limited
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