EMP Effects on High-<tex>$T _c$</tex>Superconducting Devices

Abstract

The results of a study of irreversible damage induced in microstrips made from high-thin films by high-power electromagnetic pulses is presented. It was demonstrated that at high supercritical currents, the magnetic flux flow process induces fast thermomagnetic instability. The result of this instability is local magnetic flux propagation, and subsequent irreversible damage of the high-film. The parameter = ( ) , where and are the critical damaging and superconducting-to-dissipative state transition currents, respectively, which represents the capability of the high-microstrip to withstand supercritical current, depends on the quality and critical current density of the film.

Attenuation of Electromagnetic Pulse Using High Temperature Superconductor

“…Most of previous works on FCLs with HTS materials are mainly about the power station applications, which only concern the low frequency ( 60 Hz) behavior [1], [3]- [6]. The phenomena are similar to our DC test.…”

Fast Protector Against EMP Using Thin Epitaxial and Polycrystalline Manganite Films

“…In recent years, significant progress in microwave cryogenic electronics operating at liquid nitrogen temperatures has been achieved. Symmetrical thin-film limiters using current-induced phase transitions from superconducting to normal state [3] tance" (ER) effect [4] were proposed to be capable of protecting electronic front ends from EMP. These materials could ensure subnanosecond response of limiters and withstand short EMP action.…”

Thin manganite films for fast fault current limiter applications

“…Moreover, it should be noted that fault current signals induced by SEMP are bipolar, and, therefore, symmetrical protectors are preferable. For this reason, there are good prospects for fast high-power switches based on gas discharge plasma limiters [2], protectors based on fast switching in non-crystalline semiconductors [1], and electrical current induced and field induced phase transitions in superconductors [1,3] and magnetic materials [1,4].…”