Photomultiplier tube having a photocurrent collector
AssigneeRCA Corporation
InventorJames L. Ibaugh
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Abstract
An electron discharge device includes an envelope with a primary electrode and substances for forming a photocathode therein. A photocurrent collector is provided which is electrically insulated from the photocathode and the primary electrode. The photocurrent collector is independent of the electrical leakage between the photocathode and the primary electrode encountered during formation of the photocathode and permits the sensitivity of the photocathode to be maximized.
Claims8
In an electron discharge device comprising an envelope, a photocathode within said envelope, a primary electrode in spaced relation to said photocathode, and an electron multiplier including a plurality of dynodes attached to said primary electrode, the improvement comprising:
- sensing means for monitoring the photocurrent due to said photoelectrons emitted from said photocathode during the formation thereof, said sensing means being electrically insulated from said photocathode, said primary electrode and said electron multiplier so as to be independent of the electrical leakage between said photocathode and said primary electrode.
Dependencies are inferred from the claim text.