A 2.5 Gigawatt Liquid Dielectric Coaxial Pulse Forming Line
Abstract
The pulse forming line (PFL) can store approximately 600 joules at 100 kilovolts. Line impedance is 0.86 ohm and discharge time into a matched load is 200 nanoseconds. The coaxial line is filled with a mixture of 60% ethylene glycol and 40% water, by weight, yielding the maximum freezing point depression. The dielectric liquid is dearated, deionized and cooled to subzero temperature in order to produce an intrinsic time constant of tens of milliseconds. A 50 kilovolt DC power supply with a current rating of 4 amperes is used to resonantly charge the PFL to 100 kilovolts in the millisecond time regime. A Marx generator is used for fast charging at high voltage. The PFL is being used for investigation of long term charging and breakdown statistics of water/glycol mixtures. It is also used for switch testing. In this paper, the PFL, charging systems, and liquid dielectric conditioning system are described. Experimental results of long term charging and breakdown statistics are also presented.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1987
- Accession Number
- ADA635535
Entities
People
- D. D. Lindberg
- R. J. Gripshover
- T. L. Berger
- V. H. Gehman
Organizations
- Naval Surface Warfare Center Dahlgren Division