High precision electric gate for time-of-flight ion mass...

Details High precision electric gate for time-of-flight ion mass... High precision electric gate for time-of-flight ion mass...

2009-09-30

2011-10-11

Nguyen, Kiet (Department: 2881)

Radiant energy

Ionic separation or analysis

Ion beam pulsing means with detector synchronizing means

Reexamination Certificate

active

08035081

ABSTRACT:
A time-of-flight mass spectrometer having a chamber with electrodes to generate an electric field in the chamber and electric gating for allowing ions with a predetermined mass and velocity into the electric field. The design uses a row of very thin parallel aligned wires that are pulsed in sequence so the ion can pass through the gap of two parallel plates, which are biased to prevent passage of the ion. This design by itself can provide a high mass resolution capability and a very precise start pulse for an ion mass spectrometer. Furthermore, the ion will only pass through the chamber if it is within a wire diameter of the first wire when it is pulsed and has the right speed so it is near all other wires when they are pulsed.

REFERENCES:
patent: 6037586 (2000-03-01), Baril
patent: 6770870 (2004-08-01), Vestal

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