Ion detection apparatus

Details Ion detection apparatus Ion detection apparatus

1988-07-29

1990-08-28

Berman, Jack I.

Radiant energy

Ionic separation or analysis

With sample supply means

250427, 3133611, 3133631, 313146, H01J 4914, H01J 37063

Patent

active

049528025

ABSTRACT:
Ion detection apparatus has an ionizer provided with an ionizer volume for receiving a specimen to be analyzed. An electron gun is operatively associated with the ionizer for bombarding the specimen with an electron beam and converting the specimen into ions. An analyzer receives the ions from the ionizer volume and includes a detector for detecting the ions. The electron gun has focusing means for varying the size and intensity of the electron beam. The electron gun may have an accelerating anode, a focusing collimator and a second anode. The ionizer means may have an extractor lens and collimating lens as well as a groundplate. The ionizer means may have an electron collecting plate for receiving electrons which pass through the ionizer volume and providing feedback regarding the electron beam.

REFERENCES:
patent: 2882410 (1959-04-01), Brobeck
patent: 3073951 (1963-01-01), Burdg
patent: 3356843 (1967-12-01), McElligott
patent: 3590243 (1971-06-01), Perrin et al.
patent: 4298795 (1981-11-01), Takeuchi et al.
patent: 4454894 (1984-06-01), Tallon
patent: 4663525 (1987-05-01), Ohtsuki et al.

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