Accession Number : AD0278061

Title :   DEVELOPMENT OF FIELD EMISSION FLASH X-RAY TUBES AND DEVICES

Corporate Author : JOHNS HOPKINS UNIV SILVER SPRING MD APPLIED PHYSICS LAB

Personal Author(s) : DYKE,W.P. ; GRUNDHAUSER,F.J.

Report Date : 15 DEC 1961

Pagination or Media Count : 1

Abstract : The feasibility of using T-F (thermionic and field) emission of electrons to develop high intensity fla h X-ray sources was determined. The theoretical studies included an analysis of several different electrode geometries, and the optimum direction of radiation from some target designs of special interest. The flash X-ray spectrum is analyzed on a preliminary basis by the Silberstein-Jones absorption method, and the response of several different combinations of films and intensifying screens is determined or various radiation energy levels and flash durations. An account is given of the experimental program which led to the ultimate development of a multichannel pulsed X-ray system with TF tubes capable of delivering radiation flashes of either 0.2 or 1 microsecond duration at energy levels up to 300 kv and peak electron beam currents of 1000 amperes. The final design of the system and the tubes, and the field installation of the equipment are described. (Author)

Descriptors :   ANODES (ELECTRON TUBES), CATHODES (ELECTRON TUBES), CIRCUITS, DISPLAY SYSTEMS, FIELD EMISSION, INSTALLATION, PULSE GENERATORS, THEORY, THERMIONIC EMISSION, TRANSFORMERS, X RAY SPECTRA

Distribution Statement : APPROVED FOR PUBLIC RELEASE