Multi-Stage Explosive Magnetic Amplifer (FREDA).
Abstract
FREDA is a device for amplifying magnetic flux. A small value of flux is inserted at one end of an array of copper strips and high explosive sheets. When the explosive is detonated at the input end, the field is pushed along the appa ratus, and the energy fed into it from the explosive is used to increase the magnetic flux. For most explosive-to-electrical converters it is thought that a flux amplifying device will have decisive advantages over the more common flux compression devices. A satisfactory low power FREDA stage has been designed. The length is four inches, the gain 1.4. Twenty-five stages of this type have been fired without failure. Currents around 10,000 amperes and fields around 100,000 maxwells have been obtained. The next step is the construction of FREDA chains long enough to run the field up to a value at which the field pressure approaches the explive detonation pressure, and the design of high efficiency high power stages. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 09, 1963
- Accession Number
- AD0418506