European researchers said Thursday they have created a device invisible to a static magnetic field that could have practical military and medical applications.
Fedor Gomory and colleagues in Slovakia and Spain designed a cloak for a direct current, or dc, magnetic field that is static and produced by a permanent magnet or coil carrying a direct current.
DC magnetic fields are used in MRI imaging devices, in hospitals and in security systems, such as those in airports.
The researchers’ device, described in a study in Friday’s edition of the journal Science, features a cylinder with two concentric layers. While the inner layer consists of a superconducting material that repels magnetic fields, the outer layer is a ferromagnetic material that attracts them.
Placed in a magnetic field, the device has no effect on the field lines, showing neither a shadow nor a reflection. So an object inside the device cannot be detected.
“There are many applications — for some cars, ships or a submarine,” said study co-author Alvaro Sanchez of the Autonomous University of Barcelona.
He told AFP the device could also be used for patients who have a pacemaker and need a MRI of a knee or other body part, so the image would not be distorted.
Because it is made from commercially available materials, as well as operating under relatively strong magnetic fields and relatively warm liquid nitrogen temperatures, the device could easily be put to practical use, according to the authors.
“For the submarine, you have to make a shell around the submarine that will make the submarine magnetically undetectable,” said Sanchez.
“This could also be used to protect some (military and medical) equipment against electromagnetic disturbances.”
Related Topic Tags
Related Defense, Military & Aerospace Forum Discussions
- Royal Australian Navy Discussions and Updates
- Ukranian Crisis
- Scottish Independence
- The Royal Navy Discussions and Updates
- Potential of Gripen M, the naval variant...
- Indonesian Aero News
- Russian Navy Discussions and Updates
- US Navy News and updates
- Royal New Zealand Navy Discussions and Updates
- Royal Canadian Navy Discussions and updates
- Singapore Army Pictures - 2014 Onwards
- Comparing aerial warfare with and without drones
- Iraq war/unrest/fighting
- Active Modern Military Aircraft Question...Need Input
- Future of the French/Russian Mistral LHDs