Accession Number : ADA213202

Title :   Photoelectron Pumped Phosphors,

Descriptive Note : Final rept. 25 Apr 87-31 Jan 88.

Corporate Author : SAN DIEGO STATE UNIV FOUNDATION CA

PDF Url : ADA213202

Report Date : Jul 1989

Pagination or Media Count : 82

Abstract : The reported investigation of cathodophosphors was undertaken in connection with the development of optical devices for the detection of long wavelength photons in which the initial photon-to-electron detection is performed by an optical diode, then the photoelectrons being accelerated by the electric field penetrate into a phosphor screen and the screen produces multiple photons which are detected by a (close coupled) photomultiplier. This report presents the results of a comprehensive analysis and systematization of the data relevant to the fast and very fast commercially available phosphors and developmental works on improved materials and processes in the field of phosphors, especially cathodophosphors. The investigation included analysis of II-VI phosphors, alkaline-earth chalcogenides, silicates, garnets, halides, and some ternary compounds with diamond-like crystal structure. The investigation included, also, analysis of data regarding the activators and coactivators as well as mixtures of phosphors with optically transparent conductive powders for the low-energy-electron cathodophosphors. The report includes the tables and diagrams with the phosphors' parameters, namely, their chemical composition, brightness and its drop rate, cathodoluminescence efficiency, and persistence. (jhd)

Descriptors :   *CATHODOLUMINESCENCE, *INFRARED DETECTORS, *OPTICAL PUMPING, ALKALINE EARTH METALS, CHALCOGENS, CHEMICAL COMPOSITION, CONDUCTIVITY, SEMICONDUCTOR DIODES, EFFICIENCY, ELECTRIC FIELDS, FLUORESCENT SCREENS, GARNET, GROUP IIVI COMPOUNDS, HALIDES, LONG WAVELENGTHS, MIXTURES, INFRARED EQUIPMENT, INFRARED OPTICAL MATERIALS, PARAMETERS, PHOSPHORS, PHOTOELECTRONS, PHOTOMULTIPLIER TUBES, PHOTONS, POWDERS, SILICATES, TERNARY COMPOUNDS, TRANSPARENCIES

Subject Categories : Test Facilities, Equipment and Methods
      Radiation and Nuclear Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE