High voltage spark excitation and ionization detector system

Details High voltage spark excitation and ionization detector system High voltage spark excitation and ionization detector system

1991-02-28

1992-10-06

Wieder, Kenneth A.

Electricity: measuring and testing

Using ionization effects

For analysis of gas, vapor, or particles of matter

324449, 324123R, 73 2802, G01N 2762, G01N 2768

Patent

active

051535190

ABSTRACT:
A spark detection apparatus is set forth and incorporates a closed chamber for receiving a carrier gas flowing therethrough between inlets and outlets, and the carrier gas is exposed to a pair of electrodes forming a spark across the chamber and through the carrier gas. Compounds of interest interact with the spark. The spark forms a diffusion of electrons or alternately ions during the spark distributed thereafter. The chamber includes a detector electrode spaced from the spark. High mobility particles (primarily electrons) are observed almost instantaneously with the spark while low mobility ionic particles diffuse more slowly after the termination of the spark. Using an inert carrier gas, high energy metastable molecules are dispersed and give up energy over time after the spark. The output is obtained from the electrode during, immediately after, or after a long delay relative to the spark. Another alternate output is obtained from the observed spectra during the spark and after the spark.

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