Accession Number:

AD0694450

Title:

PHOTOCATHODE PROTECTION CIRCUIT,

Descriptive Note:

Corporate Author:

SCRIPPS INSTITUTION OF OCEANOGRAPHY SAN DIEGO CALIF VISIBILITY LAB

Personal Author(s):

• Ensminger,Richard L.
• Howarth,Robert F.

Report Date:

1967-01-01

Pagination or Media Count:

6.0

Abstract:

A photocathode protection circuit applicable to high voltage electron multiplier devices was developed and successfully used. Application to a image dissector tube is described. The protection circuit features the positive firing action of a silicon-controlled rectifier, current cutoff by reverse biasing of the photocathode, and photocathode current calibration and monitoring. Inherent safeguard against socket leakage and arcing is also discussed. Author

Descriptors:

• (*CAMERA TUBES
• SWITCHING CIRCUITS)
• (*PHOTOCATHODES
• *CURRENT LIMITERS)
• SILICON CONTROLLED RECTIFIERS
• ELECTRON MULTIPLIERS
• PHOTOSENSITIVITY

Subject Categories:

• Electrooptical and Optoelectronic Devices
• Non-Radio Communications

Distribution Statement:

APPROVED FOR PUBLIC RELEASE