Radiant energy – Ionic separation or analysis
Patent
1987-08-06
1989-05-30
Anderson, Bruce C.
Radiant energy
Ionic separation or analysis
250282, 250283, B01D 5944
Patent
active
048353833
ABSTRACT:
An improved ion detection system and method for detection of low or high mass ions having high electron affinity constituent atoms or molecules. A target with a low work function target surface is employed to fragment the incident ions and produce secondary negative ions and electrons. A cesium or barium oxide source is employed to optimally provide a monolayer of cesium or barium oxide on the target surface of a molybdenum or tungsten target. The secondary ions and electrons are detected by a conventional electron multiplier detector. The potential difference between the target surface and electron multiplier detector is chosen to accelerate the secondary ions and electrons to the electron multiplier detector with an energy corresponding to high detection efficiency.
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Mahoney John F.
Perel Julius
Anderson Bruce C.
Phrasor Scientific, Inc.
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