Voltage division circuit for a photomultiplier tube

Details Voltage division circuit for a photomultiplier tube Voltage division circuit for a photomultiplier tube

1997-06-16

1999-03-09

Allen, Stephone B.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

313535, G01T 1208, H01J 4014

Patent

active

058804579

ABSTRACT:
A voltage division circuit for a photomultiplier tube in which an electron multiplication factor of the photomultiplier tube is readily changeable in a wide range with a low power consumption and without degrading a dynode's collection efficiency and an output linearity. The voltage division portion 100 divides a high voltage (-HV) at a fixed voltage division ratio determined by the resistance values of resistors 111 to 116, 121 and 122, and 131 to 134 to thereby generate voltages applied to a focusing electrode 820, dynodes 831, 832 and 836 to 838. Another voltage division portion 300 includes a variable resistor 332 and generates voltages applied to the dynodes 833 to 835 by dividing the high voltage at a variable voltage division ratio upon operating the variable resistor.

REFERENCES:
patent: 552574 (1896-06-01), Gibbons
patent: 3580684 (1971-05-01), Gordon
patent: 4367404 (1983-01-01), Kaye
patent: 4820914 (1989-04-01), Allen
patent: 5453610 (1995-09-01), Gibbons
patent: 5512755 (1996-04-01), Vickers et al.

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