Radiant energy – Ionic separation or analysis – With sample supply means
Patent
1991-10-28
1993-02-23
Anderson, Bruce C.
Radiant energy
Ionic separation or analysis
With sample supply means
250293, 250296, B01D 5944, H01J 4940
Patent
active
051893029
ABSTRACT:
Apparatus for ionizing and accelerating a sample containing isotopes of hydrogen and detecting the ratios of hydrogen isotopes contained in the sample is disclosed. An ion source generates a substantially linear ion beam including ions of tritium from the sample. A radio-frequency quadrupole accelerator is directly coupled to and axially aligned with the source at an angle of substantially zero degrees. The accelerator accelerates species of the sample having different mass to different energy levels along the same axis as the ion beam. A spectrometer is used to detect the concentration of tritium ions in the sample. In one form of the invention, an energy loss spectrometer is used which includes a foil to block the passage of hydrogen, deuterium and .sup.3 He ions, and a surface barrier or scintillation detector to detect the concentration of tritium ions. In another form of the invention, a combined momentum/energy loss spectrometer is used which includes a magnet to separate the ion beams, with Faraday cups to measure the hydrogen and deuterium and a surface barrier or scintillation detector for the tritium ions.
REFERENCES:
patent: H75 (1986-06-01), Grisham et al.
patent: 3885155 (1975-05-01), Anbar
patent: 4390784 (1983-06-01), Browning et al.
patent: 4490648 (1984-12-01), Lancaster et al.
patent: 4666651 (1987-05-01), Barjon et al.
patent: 4762993 (1988-08-01), Moses
patent: 4801847 (1989-01-01), Sakudo et al.
patent: 4812775 (1989-03-01), Klinkostein et al.
patent: 4973841 (1990-11-01), Purser
patent: 5013923 (1991-05-01), Litherland et al.
patent: 5086256 (1992-02-01), Tokiguchi et al.
[Preprint] Vogel et al. "Application of AMS to the Biomedical Sciences", presented at the Fifth International Conference on Accelerator Mass Spectrometry held in Paris, France, Apr. 1990.
[Preprint] Felton et al. "Accelerator Mass Spectrometry in the Biomedical Sciences: Applications in Low-Exposure Biomedical and Environmental Dosemetry", presented at the Fifth International Conference on Accelerator Mass Spectrometry held in Paris, France, Apr. 1990.
[Preprint] Davis et al., "LLNL/UC AMS Facility and Research Program," prepared for submittal to the Fifth International Conference on Accelerator Mass Spectrometry, Paris, France, Apr. 23-27, 1990.
King et al., "Detection of Tritium Using Accelerator Mass Spectrometry" Nuclear Instruments and Methods in Physics Research, B29, pp. 14-17 (1987).
Middleton et al., "Tritium Measurements with a Tandem Accelerator", Nuclear Instruments and Methods in Physics Research B47, p. 409 (1990).
Songsheng et al., "Determination of Tritium Using a Small Van de Graaff Accelerator", Nuclear Instruments and Methods in Physics Research B5, p. 226 (1984).
Proctor et al., Nuclear Instruments and Methods in Physics Research B52, p. 334 (1990).
Bronk et al., Radiocarbon 31, p. 298 (1989).
Turtletaub et al., Proc. Natl. acad. Sci. (USA) 87: 5288-5292 (Jul. 1990).
Proctor, Nuclear Instruments and Methods in Physics Research B40/41: 727-730 (1989).
Davis, Nuclear Instruments and Methods in Physics Research B40/41: 705-708 (1989).
Davis Jay C.
Roberts Mark L.
Anderson Bruce C.
Gaither Roger S.
Moser William R.
Sartorio Henry P.
The United States of America as represented by the United States
LandOfFree
Small system for tritium accelerator mass spectrometry does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Small system for tritium accelerator mass spectrometry, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Small system for tritium accelerator mass spectrometry will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2207720