Ion volume ring

Details Ion volume ring Ion volume ring

1987-10-23

1989-03-28

Anderson, Bruce C.

Radiant energy

Ion generation

Electron bombardment type

250288, 250292, H01J 2700, B01D 5944

Patent

active

048166855

ABSTRACT:
An ionizer for a quadrupole filter mass spectrometer has an ion volume ring which surrounds the filament and ionization chamber for 360.degree.. Heat from the filament is absorbed by the ring which suppresses secondary electron emission and directs electrons to the ionization chamber. The ion volume ring is in heat conducting relationship with accelerating and focusing electrodes to transfer heat to the electrodes to reduce contamination. The ion volume ring is electrically connected and is at the same potential as the filament.

REFERENCES:
patent: 3723729 (1973-03-01), Kruger et al.
patent: 3932749 (1976-01-01), Taylor
patent: 4039828 (1977-08-01), Pokar et al.
patent: 4529571 (1985-07-01), Bacon et al.

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