SOME MEASUREMENTS FOR THE EFFICIENCY IN OBSERVING PHOTOELECTRONS IN IMAGE INTENSIFIERS

Technical Report · Thu Mar 01 04:00:00 EST 1962

OSTI ID:4833608

Waters, J R; Reynolds, G T; Scarl, D B; Zdanis, R A

A method is described for measuring the efficiency with which photoelectrons can be detected in an image intensifier system. A weak light is shone onto the first cathode and the photoelectron current measured. The light is then attenuated by a large known factor and compared with the number of spots observed in a given time. A simple system was used to demonstrate this method; a maximum efficiency of 85% was achieved. The results of experiments with a filament scintillation chamber and a Cerenkov detector using image intensifiers are discussed and yield some information about the electron detection efficiency. A simple method of finding the detection threshold is also mentioned with two typical examples of its results. (auth)

• Research Organization: Princeton-Pennsylvania Accelerator, Princeton, N.J.; Princeton Univ., N.J.
• NSA Number: NSA-16-017822
• OSTI ID: 4833608
• Report Number(s): PPAD-450-E; March 1-3, 1962
• Country of Publication: United States
• Language: English

Related Subjects

CATHODES
CHERENKOV COUNTERS
EFFICIENCY
ELECTRICITY
ELECTRONS
ENGINEERING AND EQUIPMENT
IMAGES
LIGHT
MEASURED VALUES
PHOTOELECTRIC EFFECT
SCINTILLATION COUNTERS