Degaussing System for Marine Applications
January 1, 2011
Cryogenic technology is not for “landlubbers” alone. Similar to the high temperature superconductivity systems being developed for electric power transmission, advanced degaussing coils are helping make military ships “invisible.”
Deguassing systems mask a ship’s magnetic signature, making it much more difficult to be seen or detected by magnetic sensors and by magnetically activated mines. With steel being the main construction material of military ships, the ship causes a disturbance to the earth’s magnetic field as they pass, allowing for their detection. As a countermeasure, degaussing systems are used to reduce or eliminate the threat of magnetically influenced mines; thus, increasing ship survivability.
This advanced HTS degaussing coil runs completely along the circumference of the ship’s hull in a vacuum-jacketed, cryogenically cooled transfer line operating at a temperature of nearly -400°F (-240°C). Cooling the HTS degaussing system reduces the weight of the current copper-based systems by 50 to 80 percent, which offers fuels savings or the ability to add additional payloads. Additional cooling equipment required for this system includes a refrigeration system, a junction box for access to the cable, power, instrumentation, refrigeration and vacuum port.