Uses of Superconductors

MRI (Magnetic Resonance Imaging) machines use superconductors to deliver a strong enough magnetic field so that hydrogen atoms in the body's fat and water molecules will pick up energy from the field which can then be detected by special instruments. SQUIDS (Superconducting QUantum Interference Device) can be used like an MRI, but without the need for a strong magnetic field. They can detect magnetic fields of infinitely small magnitudes. They can also be used for extremely precise motion detection.

 maglev train

Courtesy of superconductors.org

One area of much research is in the use of superconductors for transportation. Specifically in maglev (magnetic levetation) trains. Trains could theoretically be made to float above a track and move without friction (other than wind resistance). In December 2003 Japan tested the MLX01 test train than attained a speed of 361 mph. A small scale version of a simple maglev train is shown below.






Superconductor generator technology has been improving greatly. Electric generators made with superconducting wire are far more efficient than conventional generators wound with copper wire. In fact, their efficiency is above 99% and their size about half that of conventional generators. These facts make them very lucrative ventures for power utilities.General Electric has estimated the potential worldwide market for superconducting generators in the next decade at around $20-30 billion dollars. Late in 2002 GE Power Systems received $12.3 million in funding from the U.S. Department of Energy to move high-temperature superconducting generator technology toward full commercialization.

Navy
              vessel
Photo courtesy of superconductors.com


The military has also been using superconductors. One example is in the degaussing of ship hulls. Superconductors can be used to aid in combat as well. The 
most known use of superconductors may come with the deployment of "E-bombs". These are devices that make use of strong, superconductor-derived magnetic fields to create a fast, high-intensity electro-magnetic pulse (EMP) to disable an enemy's electronic equipment. Such a device (shown below) saw its first use in wartime in March 2003 when US Forces attacked an Iraqi broadcast facility. 

ebomb
Photo courtesy of globalsecurity.org



Bibliography

Main Page