NDLI: Stability and Normal Zone Propagation in a 50 Tesla Solenoid Wound of YBCO Coated Conductor Tape

Content Provider	IEEE Xplore Digital Library
Author	Majoros, M. Sumption, M.D. Collings, E.W.
Copyright Year	2002
Abstract	We present an analysis of stability, heating and quench propagation in a 50 Tesla solenoid immersed in a liquid helium bath at 4.2 K, obtained by numerical Finite Element Method (FEM) modeling. The solenoid was assumed to be wound of a cable made of YBCO coated conductor tapes. Full heat transfer curve in the whole temperature range (from 4.2 K up to 300 K) for liquid helium, taken from experiment, was used. An anisotropic continuum model of the winding for thermal propagation, with input data taken from experiments, was developed and adopted in computations. Magnetic field and temperature dependent parameters, such as electrical and thermal conductivities, heat capacities etc., also taken from experiments, were considered. We modeled a single-coil 50 T solenoid as well as a segment approach, in which a 34 T winding, segmented radially, is the inner-most part of a system of and NbTi solenoids providing a background field of 16 Tesla. Stress-strain modeling showed that due to a strong anisotropy of in YBCO film, the critical current of the solenoid is not limited by mechanical forces, but by the radial magnetic field component in the winding, i.e. by the field component parallel to c-axis of YBCO film. We found quite a high degree of stability of the 50 Tesla solenoid with existing stagnant normal zones and significant heat conduction across the winding.
Sponsorship	Council on Superconductivity Appl. Superconductivity Conference Inc MIT
Starting Page	4705104
Ending Page	4705104
Page Count	1
File Size	1213224
File Format	PDF
ISSN	10518223
Volume Number	22
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-06-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Solenoids Windings Yttrium barium copper oxide Conductivity Conductors Magnetic fields Heating YBCO Accelerator magnet coated conductor normal zone propagation stability
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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