Ion mobility detector

Details Ion mobility detector Ion mobility detector

H - Electricity

01

J

H01J 49/26 (2006.01) G01N 27/64 (2006.01)

Patent

CA 2063664

ION MOBILITY DETECTOR Abstract of the Disclosure An ion mobility detector comprising a one piece dielectric tube with conductive bands as field elements for accelerating ions formed in a reactor region of the tube and passed to a drift region of the tube under control of a gate separating the reactor region from the drift region and thence to an electrometer plate. A first d.c. voltage source provides operating voltages to the conductive bands while a separate d.c. voltage source provides operating voltages to the gate. The detector includes circuitry for varying the potential of the gate to ensure correct focusing of ions within the cell. The circuitry includes an arrangement for altering the potential of the gate. The arrangement can be automatically controlled as a function of the output of an amplifier connected to the electrometer plate.

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