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Reducing gain shifts in photomultiplier tubes

Patent ·
OSTI ID:7347712
A means is provided for reducing gain shifts in multiplier tubes due to varying event count rates. It includes means for limiting the number of cascaded, active dynodes of the multiplier tube to a predetermined number with the last of predetermined number of dynodes being the output terminal of the tube. This output is applied to an amplifier to make up for the gain sacrificed by not totally utilizing all available active stages of the tube. Further reduction is obtained by illuminating the predetermined number of dynodes with a light source of such intensity that noise appearing at the output dynode associated with the illumination is negligible.
Assignee:
Energy Research and Development Administration
Patent Number(s):
US 3943458
OSTI ID:
7347712
Country of Publication:
United States
Language:
English

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Related Subjects

440101* -- Radiation Instrumentation-- General Detectors or Monitors & Radiometric Instruments
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
AMPLIFIERS
ELECTRONIC CIRCUITS
ELECTRONIC EQUIPMENT
GAIN
MEASURING INSTRUMENTS
PHOTOMULTIPLIERS
PHOTOTUBES
RADIATION DETECTORS
SCINTILLATION COUNTERS
STABILIZATION