Ionisation chambers
AssigneeThe Secretary of State for Defence
InventorMorgan Jones
Life of this patent
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Abstract
The invention provides for an ionisation chamber suitable for the detection of radioactive gas in air. The chamber has an annular collection electrode and an annular polarising electrode, each electrode having a diameter, a proximate end and a distal end, the proximate ends of both electrodes being fixed at a base plate, wherein each electrode is supported by an insulator, wherein the insulator supporting polarising electrode comprises an outer ring and an inner ring, the outer ring having a diameter corresponding that of the polarising electrode.
Claims11
An ionisation chamber, having an annular collection electrode and an annular polarising electrode, each electrode having a diameter, a proximate end and a distal end, the proximate ends of both electrodes being fixed at a base plate, wherein each electrode is supported by an insulator, wherein the insulator supporting the annular polarising electrode comprises an outer and an inner ring, said rings being concentric, the outer ring having a diameter corresponding to the diameter of the outer ring of the annular polarising electrode, and wherein the concentric rings have an electrically resistive material between them formed into spokes.
Dependencies are inferred from the claim text.