Theoretical evaluation of the screening-current-induced magnetic field in superconducting coils with tape wires
نویسندگان
چکیده
منابع مشابه
Transport and magnetic critical current in superconducting MgB2 wires
Direct comparison of the magnetic and transport critical current density (Jc) for the same pieces of copper-sheathed MgB2 wires shows a large discrepancy in magnitude and field dependence of the two. The value of magnetic Jc can differ from the value of transport Jc by a factor of 10 or more. This discrepancy does not occur merely because of the difference in the voltage at which the magnetic a...
متن کاملپیشرفتهای اخیر در زمینه ساخت سیم و نوار ابررسانای MgB2
MgB2 wire and tape were prepared using the powder in tube and reaction in-situ technique. All samples were characterized using the XRD, SEM, TEM, as well as transport and magnetic measurements. High transport and magnetic critical current density values have been obtained for metal-clad wires and tapes. Different sheath materials have been examined, but Fe appears to be the best sheath for MgB...
متن کاملSuperconducting current in narrow proximity wires
The critical supercurrent in proximty-wires shows a surprising temperature dependence in the experiment [1]. This observation has lead to speculation whether there are new e ects involved and/or the usual criterion for the dirty limit is not valid for this type of systems. We propose a simple SNS-model for this system and show analytically, that this unexpected scaling is already contained in a...
متن کاملThree-dimensional calculations of the magnetic fields in a finite superconducting hollow cylinder in an applied axial magnetic field
In this study, a set of self-consistent coupled-integral equations for the local magnetic flux and current distributions in a finite superconducting hollow cylinder under an axial magnetic field has been directly derived by using the Biot-Savart law within the framework of the critical-state model. The equations were first solved numerically in the three-dimensional space before obtaining the h...
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ژورنال
عنوان ژورنال: Applied Physics Express
سال: 2018
ISSN: 1882-0778,1882-0786
DOI: 10.7567/1882-0786/aaf171