High Power Dielectric Properties of Water Mixtures
NAVAL SURFACE WARFARE CENTER DAHLGREN VA
Pagination or Media Count:
Recent advances in the use of water and water mixtures as the dielectric in high power pulse-forming lines PFLs are reviewed. The important electrical properties of these liquids and their variation with mixture ratio are presented. Special attention is given to the large increase in the resistivity of waterglycol mixtures upon purification and cooling. This resistivity increase leads to a much longer intrinsic time constant than is achievable with pure water, and permits PFLs to be charged in the millisecond time frame rather than the microsecond time scales required in conventional water systems. The newly recognized phenomenon of charge injection is discussed. Finally, the impact of these findings on the design of future PFLs is presented.
- Electricity and Magnetism