OPERATION OF THE SCINTILLATOR PHOTOMULTIPLIER DETECTOR UNDER CONDITIONS OF CHANGING SCINTILLATION RATE

Technical Report · Tue Jun 19 00:00:00 EDT 1962

OSTI ID:4773392

Gould, F T

The characteristics of a photomultiplier scintillator system under conditions of a rapidly changing flux were investigated. The results indlcated a sensitivity to rapidly changing high count rates which causes a detector instability in pulsed neutron measuremerts. The instability was traced to the photocathode surface of the photomultiplier which changes its characteristics as a function of the light output of the scintillator. Since the pulsed neutron sources were not uniform in burst intensity, large effects could be obtained particularly in the case when the source output changed radically. The instability was due to a solid-state effect known as enhancement of photoelectric emission by photon irradiation. (auth)

• Research Organization: Knolls Atomic Power Lab., Schenectady, N.Y.
• DOE Contract Number: W-31-109-ENG-52
• NSA Number: NSA-17-001746
• OSTI ID: 4773392
• Report Number(s): KAPL-M-FTG-1
• Country of Publication: United States
• Language: English

Related Subjects

CATHODES
EFFICIENCY
ELECTRON BEAMS
EMISSION
INSTRUMENTS AND INSTRUMENTATION
IRRADIATION
NEUTRON DETECTION
NEUTRON SOURCES
PHOTOELECTRIC EFFECT
PHOTOMULTIPLIERS
PHOTONS
RADIATION EFFECTS
SCINTILLATION COUNTERS
SCINTILLATIONS
SENSITIVITY
STABILITY
SURFACES
VARIATIONS