Field ionization ion source
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United States of America Patent
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N/A
Issued Date -
Jul 3, 2003
app pub date -
Dec 27, 2001
filing date -
Dec 28, 2000
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A field-ionization source, comprising array of emitter electrodes (31) and counter electrodes (32) positioned at a distance from the base (P1) of the emitter electrodes. The emitter electrodes, ending in emitter tips (61), extend from their bases towards corresponding openings (62) of the counter electrodes and are adapted to be connected to a positive electric high voltage with respect to the counter electrodes. At the emitter tips (61), gas species provided from a source substance are field-ionized by means of the high voltage and ions thus produced are accelerated through the openings (61, 41). A distribution system (43, S2) is provided to distribute said source substance from a supply to the space (S1) around the emitter tips.
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