Radiant energy – Ionic separation or analysis – With sample supply means
Patent
1989-06-05
1990-06-12
Anderson, Bruce C.
Radiant energy
Ionic separation or analysis
With sample supply means
250423R, 250427, 31511181, H01J 4626, H01J 3712
Patent
active
049335510
ABSTRACT:
An in-line reversal electron, high-current ionizer capable of focusing a beam of electrons to a reversal region and executing a reversal of said electrons, such that the electrons possess zero kinetic energy at the point of reversal, may be used to produce both negative and positive ions. A sample gas is introduced at the point of electron reversal for low energy electron-(sample gas) molecule attachment with high efficiency. The attachment process produces negative ions from the sample gas, which includes species present in trace (minute) amounts. These ions are extracted efficiently and directed to a mass analyzer where they may be detected and identified. The generation and detection of positive ions is accomplished in a similar fashion with minimal adjustment to potentials applied to the apparatus.
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Bernius Mark T.
Chutjian Ara
Anderson Bruce C.
Glenn Charles E. B.
Jones Thomas H.
Manning John R.
The United State of America as represented by the Administrator
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