Accession Number : AD0694450

Title :   PHOTOCATHODE PROTECTION CIRCUIT,

Corporate Author : SCRIPPS INSTITUTION OF OCEANOGRAPHY SAN DIEGO CALIF VISIBILITY LAB

Personal Author(s) : Ensminger,Richard L. ; Howarth,Robert F.

Report Date : JAN 1967

Pagination or Media Count : 6

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