Analysis of magnetic response of critical state in second-generation high temperature superconductor YBa2Cu3Ox wire

2009 ◽  
Vol 106 (6) ◽  
pp. 063901 ◽  
Author(s):  
Ahmed Youssef ◽  
Zdeněk Švindrych ◽  
Zdeněk Janů
Keyword(s):  
High Temperature ◽  
Critical State ◽  
High Temperature Superconductor ◽  
Second Generation ◽  
Magnetic Response

Pulse Magnetization Studies on Partially Slit Second-Generation High-Temperature Superconductor Tape

2015 ◽  
Vol 25 (3) ◽  
pp. 1-4 ◽  
Author(s):  
Edward Chen ◽  
Devdatta P. Kulkarni ◽  
Haran Karmaker ◽  
Dean Sarandria ◽  
Leslie Bromberg
Keyword(s):  
High Temperature ◽  
High Temperature Superconductor ◽  
Second Generation ◽  
Pulse Magnetization ◽  
Superconductor Tape

Oxygen loading in second-generation high-temperature superconductor tapes

2006 ◽  
Vol 6 (3) ◽  
pp. 511-514
Author(s):  
N.M. Strickland ◽  
G.V.M. Williams ◽  
Anita Semwal ◽  
D.T. Verebelyi ◽  
W. Zhang
Keyword(s):  
High Temperature ◽  
High Temperature Superconductor ◽  
Second Generation

Inspection of Thin Copper Heat Exchanger Tubes Using SQUID-NDE System

2006 ◽  
Vol 321-323 ◽  
pp. 1425-1430
Author(s):  
Yoshimi Hatsukade ◽  
Shinya Okuno ◽  
Kazuaki Mori ◽  
Saburo Tanaka
Keyword(s):  
High Temperature ◽  
Heat Exchanger ◽  
Eddy Current ◽  
High Temperature Superconductor ◽  
Outer Diameter ◽  
Magnetic Response ◽  
Excitation Field ◽  
Surface Flaws ◽  
Artificial Surface

This study is aimed at developing an eddy-current-based SQUID-NDE system for in-situ inspection of micro flaws on thin copper heat exchanger tubes. The system employs a high temperature superconductor (HTS-) SQUID gradiometer and a Helmholtz-coil-type inducer. As specimens, copper tubes 6.35 mm in outer diameter and 0.8 mm in thickness with artificial surface flaws of several tens μm in depth were inspected using the system. Magnetic response due to a flaw of 10 μm in depth on the tube moving at 32 m/min was successfully detected while applying an excitation field of 10 μT at 3 kHz to the tube. Numerical simulations were also conducted to evaluate how many sensors would be required for inspection around the circumference of an entire tube.

scholarly journals Levitation and Lateral Stabilization Device Based on a Second-Generation High-Temperature Superconductor

2019 ◽  
Vol 5 (4) ◽  
pp. 115-123
Author(s):  
Yuri F. Antonov
Keyword(s):  
Magnetic Field ◽  
High Temperature ◽  
High Temperature Superconductor ◽  
Second Generation ◽  
Permanent Magnets ◽  
Transport Current ◽  
Critical Parameters ◽  
Technical Solution ◽  
The Magnetic Field ◽  
Superconducting Levitation

The superconducting levitation device comprises a stationary magnetic rail of permanent magnets and a cryostat on a vehicle with a second-generation high-temperature tape superconductor placed in the cryostat, folded in a stack or wound by a coil on a non-magnetic frame without electrical connection of the ends and the transport current. Cool tape high-temperature superconductor of the second generation, folded in a stack or wound on a non magnetic frame in the form of axisymmetric or track coil, without electric connections of the ends and a transport current, behaves as a massive sample of a superconductor and the Meissner Oxenfeld effect, the magnetic field created by the magnetic rail is displaced from the volume of the superconductor, causing the power of levitation and the vehicle hangs over the track structure. The high critical parameters of the second-generation high-temperature superconductor belt ensure efficient operation of the superconducting levitation device. Aim: To demonstration the technical feasibility and efficiency of creating a levitation unit based on the use of a second-generation high-temperature superconductor and permanent magnets made of rare earth metals. Methods: Calculations of the magnetic field distribution in the combination of a magnetic rail and a massive superconductor, preliminary design of the levitation unit and experimental studies on the model. Results: Experiments on a model of a superconducting levitation device confirmed the efficiency of this technical solution and its effectiveness. Conclusion: an original technical solution is proposed that allows to significantly improve the energy characteristics of the levitation node by using a second-generation high-temperature superconductor operating in a passive mode without a transport current, using the partial Meissner-Oxenfeld effect and the engagement of quantized magnetic flux strands at the pinning centers.

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