Electric field in hard superconductors with arbitrary cross section and general critical current law
نویسندگان
چکیده
منابع مشابه
Electric field in hard superconductors with arbitrary cross section and general critical current law
The induced electric field E(x) during magnetic flux entry in superconductors with arbitrary cross section Ω and general critical current law, has been evaluated by integration along the vortex penetration paths. Nontrivial flux motion streamlines are obtained from a variational statement of the critical state, which takes the form of an optimization problem on the finite element dis-cretizatio...
متن کاملUniversal self-field critical current for thin-film superconductors
For any practical superconductor the magnitude of the critical current density, Jc, is crucially important. It sets the upper limit for current in the conductor. Usually Jc falls rapidly with increasing external magnetic field, but even in zero external field the current flowing in the conductor generates a self-field that limits Jc. Here we show for thin films of thickness less than the London...
متن کاملKiloampere, Variable-Temperature, Critical-Current Measurements of High-Field Superconductors
We review variable-temperature, transport critical-current (I c) measurements made on commercial superconductors over a range of critical currents from less than 0.1 A to about 1 kA. We have developed and used a number of systems to make these measurements over the last 15 years. Two exemplary variable-temperature systems with coil sample geometries will be described: a probe that is only varia...
متن کاملSpiral superconducting Nb-Ti filaments: electric field and critical current
As a first step to a better understanding of the voltage-current characteristics of fine filament multifi lamentary composite superconductors, the electric field and critical current along a single spiral-shaped fi lament were studied. When the spiral superconducting filament was carrying constant current and placed in a magnetic field, the local critical current and electric field vary due to ...
متن کاملMeissner-London currents in superconductors with rectangular cross section.
Exact analytic solutions are presented for the magnetic moment and screening currents in the Meissner state of superconductor strips with rectangular cross section in a perpendicular magnetic field and/or with transport current. The extension to finite London penetration is achieved by an elegant numerical method which works also for disks. The surface current in the specimen corners diverges a...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Applied Physics
سال: 2004
ISSN: 0021-8979,1089-7550
DOI: 10.1063/1.1736331