Radiant energy – Ionic separation or analysis – Ion beam pulsing means with detector synchronizing means
Patent
1982-10-18
1985-05-14
Anderson, Bruce C.
Radiant energy
Ionic separation or analysis
Ion beam pulsing means with detector synchronizing means
250290, 250397, B01D 5944
Patent
active
045174628
ABSTRACT:
The invention relates to an ion current measuring device.
This device comprises a vacuum chamber, a diaphragm for introducing an ion beam into the chamber, means for collecting the ions from the diaphragm and located at the end of the chamber opposite to the diaphragm, and means for measuring a periodic voltage between the collecting means and the reference earth. It is characterized in that it also comprises means located between the diaphragm and the collecting means, for bringing about a periodic modulation of the intensity of the ion current circulating between the collecting means and a reference earth, the measuring means being current or frequency measuring means.
Application to the measurement of ion currents, particularly in mass spectrometry.
REFERENCES:
patent: 2612607 (1952-09-01), Stephens
patent: 2659822 (1953-11-01), Lee
patent: 3258591 (1966-06-01), Blauth et al.
patent: 3551675 (1970-12-01), Miller et al.
"Measurement of Equilibrium Charge Distribution with a Thick Target", Fukuzawa, Physics Lett., vol. 43A, No. 2, 2-73, pp. 147-148.
"Atomic Beam Spectrometer for Surface Investigations", Scherb et al., Rev. Sci. Inst., vol. 47, No. 12, Dec. 1976, pp. 1511-1515.
"Pulsed Beam Chopper for Lamp", Bentley et al., IEEE Trans. on Nuclear Sci., vol. NS-22, No. 3, 1975, pp. 1526-1528.
"In-Line Faraday Cup for Ion Implantation", Keller, IBM Tech. Discl. Bull., vol. 17, No. 8, Jan. 1975, p. 2457.
Boyer Robert
Duval Claude
Anderson Bruce C.
Commissariat a l''Energie Atomique
Nilles James E.
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