Regulation of the Individual Dynode Voltages for Photomultiplier Tubes

Abstract
An individual dynode voltage regulating system has been devised which can be mounted on the phototube socket in much the same manner as, and with no more difficulty than, the common bleeder resistance voltage divider. Two types of these regulators have been investigated; the first using silicon diodes, and the second using NE-2 neon tubes. The statistical spread of beta-ray counts was reduced from (±) six standard deviations to nearly the normal spread of (±) three standard deviations. The photometric sensitivity range of linearity was increased by an order of magnitude.

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