Radiant energy – Ionic separation or analysis – Ion beam pulsing means with detector synchronizing means
Patent
1982-02-11
1984-12-18
Howell, Janice A.
Radiant energy
Ionic separation or analysis
Ion beam pulsing means with detector synchronizing means
250282, 250294, B01D 5944, H01J 4940
Patent
active
044892373
ABSTRACT:
A highly sensitive broad band mass spectrometer consists of a broad band selector of a low energy level beam of negative ions to be examined; a molecular disintegrator and charge changer which receives the negative ions and produces a beam of high-energy multiply charged positive ions free of molecules; and a broad band high-energy, continuously-operable isochronous time-of-flight mass spectrometer which receives the output from the molecular disintegrator. The disintegrator destroys molecules that would obscure the measurement of atomic species. Both selector and spectrometer preferably are electrostatic to avoid mass discrimination and maintain the broad band capability. The use of an isochronous time-of-flight mass spectrometer permits continuous operation which increases sensitivity. The ion selector may be of a magnetic type if a somewhat narrower band of masses is acceptable.
REFERENCES:
patent: 3863068 (1975-01-01), Poschenrieder
patent: 4005291 (1977-01-01), Arsenault
patent: 4037100 (1977-07-01), Purser
Hallin Emil L.
Kilius Linas R.
Litherland Albert E.
Hannaher Constantine
Howell Janice A.
The Innovations Foundation of the University of Toronto
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