SUPERCONDUCTING HIGH VOLTAGE DELAY LINE,
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)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1965
- Accession Number
- AD0479570
Entities
People
- A. J. Cummings
- H. Kuettner
Organizations
- EG&G