Title :
Superconducting generator of electromagnetic pulses
Author_Institution :
P.N. Lebedev Phys. Inst., Acad. of Sci., Moscow, Russia
fDate :
6/1/1997 12:00:00 AM
Abstract :
An idea for the creation of active devices is proposed, based on flux jumps in layered superconductors. In a magnetic field slightly tilted to the layers a system of kinks on vortex lines can arise in such superconductors. Rotation of the sample leads to the existence of a kink structure even in a parallel magnetic field, since the planar pinning centers obstruct disappearance of the kinks. This is confirmed by the existence of a perpendicular component of the trapped magnetic field when the film is parallel to the external field under rotation. The transition of the lattice into the ground state with minimum energy should lead to the generation of an electromagnetic pulse; its output energy is equal to the sum of the energies of the kinks, which can be a significant part of the energy of the magnetic field in the sample.
Keywords :
electromagnetic pulse; flux pinning; flux-line lattice; niobium; niobium compounds; pulse generators; superconducting device testing; superconducting junction devices; superconducting thin films; Nb-NbO; Nb/NbO/sub x/ layers; active devices; flux jumps; ground state; kink structure; layered superconductors; parallel magnetic field; planar pinning centers; sample rotation; superconducting EM pulse generator; tilted magnetic field; trapped magnetic field; vortex lines; EMP radiation effects; Lattices; Magnetic fields; Magnetic films; Pulse generation; Stationary state; Superconducting devices; Superconducting epitaxial layers; Superconducting films; Superconductivity;
Journal_Title :
Applied Superconductivity, IEEE Transactions on