Accession Number : AD0479570

Title :   SUPERCONDUCTING HIGH VOLTAGE DELAY LINE,

Corporate Author : EDGERTON GERMESHAUSEN AND GRIER INC LAS VEGAS NV

Personal Author(s) : Cummings, A. J. ; Kuettner, H.

Report Date : DEC 1965

Pagination or Media Count : 24

Abstract : Various types of coaxial cables with superconducting properties have been evaluated for both low voltage and high energy pulse propagation. A relationship between pulse widths and voltage levels has been observed and their effect on maximum energy propagation has been analyzed. A summary of earlier evaluations is given. A new cable construction with a pure niobium inner conductor, Teflon FEP dielectric and a thin tubular layer of high purity lead has shown superior properties as compared to the other types. Voltages up to 5KV and pulse widths up to 4 microseconds have been transmitted at 4.2 K over a length of 1040 ft with a line response of approximately 0.39 nanoseconds. This is an unprecedented rise time commensurate with high voltage capabilities. The characteristic impedance throughout the line is controlled to within less than + or - 1% in a 50-ohm system resulting in very low reflexions and less than 1/2 db signal attenuation for the 1040 ft test length including nonsuperconducting lead-ins. (Author)

Descriptors :   *SUPERCONDUCTORS), (*DELAY LINES, (*COAXIAL CABLES, SUPERCONDUCTORS), PROPAGATION, ELECTROMAGNETIC PULSES, VOLTAGE, NIOBIUM, HALOCARBON PLASTICS, DIELECTRICS, LEAD(METAL), WAVE PROPAGATION, ATTENUATION, RESPONSE.

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE