Electron capture detector with guard electrode

Details Electron capture detector with guard electrode Electron capture detector with guard electrode

G - Physics

01

N

G01N 30/70 (2006.01) G01N 27/66 (2006.01) G01N 30/02 (2006.01)

Patent

CA 2151979

An improved ECD employing an ECD cell having a third electrode, i.e. guard, positioned between the ECD cell field electrodes. The guard electrode is physically interposed between said field electrodes to divert all leakage current in the support insulators which flow between the field electrodes. The guard electrode ECD cellprovides improved linear dynamic range as well as avoiding deterioration from handling during manufacture or repair.

L'invention concerne un détecteur à capture d'électrons utilisant une cellule DCE ayant une troisième électrode, i.e. une électrode de garde, positionnée entre ses électrodes de champ. Ainsi placée, l'électrode de garde détourne tous les courants de fuite des isolateurs support qui circulent entre les électrodes de champ. La cellule DCE équipée d'une électrode de garde se caractérise par une plage étendue de mesure linéaire dynamique et résiste à la détérioration en cours de manutention à la fabrication ou à la réparation.

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