NDLI: Magnetization Anomaly of <formula formulatype=inline> <tex>${rm Nb}_{3}{rm Al}$</tex></formula> Strands and Instability of <formula formulatype=inline><tex>${rm Nb}_{3}{rm Al}$</tex></formula> Rutherford Cables

Content Provider	IEEE Xplore Digital Library
Author	Yamada, R. Kikuchi, A. Wake, M.
Copyright Year	2002
Abstract	Using a Cu stabilized strand with Nb matrix, a 30 meter long Rutherford cable was made by a collaboration of Fermilab and NIMS. Recently the strand and cable were tested. In both cases instability was observed at around 1.5 Tesla. The magnetization of this strand was measured first using a balanced coil magnetometer at 4.2 K. Strands showed an anomalously large magnetization behavior around at 1.6 T, which is much higher than the usual (4.2 K) of Nb matrix. This result is compared with the magnetization data of short strand samples using a SQUID magnetometer, in which a flux-jump signal was observed at 0.5 Tesla, but not at higher field. To explain this magnetization anomaly, the interfilament coupling through the thin Nb films in the strands due to the proximity effect, which is preventing the full penetration of the external field into the inside part of strand, is suggested. The instability problems observed in low field regions of the Rutherford cables and the small racetrack magnet wound with this cable are attributed to this effect.
Sponsorship	Council on Superconductivity Appl. Superconductivity Conference Inc MIT
Starting Page	2502
Ending Page	2505
Page Count	4
File Size	1211088
File Format	PDF
ISSN	10518223
Volume Number	17
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-06-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Magnetization Niobium SQUID magnetometers Collaboration Testing Coils Couplings Proximity effect Cables Wounds proximity effect Anomaly of magnetization instability ${\rm Nb}_{3}{\rm Al}$ Rutherford cable ${\rm Nb}_{3}{\rm Al}$ strand
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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Characteristics of Round and Extracted Strands of ${hbox{Nb}}_{3}hbox{Al}$ Rutherford Cable

Magnetization, Low Field Instability and Quench of RHQT ${rm Nb}_{3}{rm Al}$ Strands

Quench Tests and FEM Analysis of ${rm Nb}_{3}{rm Al}$ Rutherford Cables and Small Racetrack Magnets

Quench Tests of ${rm Nb}_{3}{rm Al}$ Small Racetrack Magnets

Feasibility Study of ${rm Nb}_{3}{rm Al}$ Rutherford Cable for High Field Accelerator Magnet Application

Strand and Cable Development for a High Field ${rm Nb}_{3}{rm Al}$ Common Coil Magnet

Effect of Cable Edge Deformation on RRR and Magnetization of Strands Extracted From ${rm Nb}_{3}{rm Sn}$ Rutherford-Type Cables

Development of ${rm Nb}_{3}{rm Al}$ Rutherford Cable for High-Field Accelerator Magnet Applications

Study of Effects of Deformation in ${rm Nb}_{3}{rm Sn}$ Multifilamentary Strands

Magnetization Anomaly of ${rm Nb}_{3}{rm Al}$ Strands and Instability of ${rm Nb}_{3}{rm Al}$ Rutherford Cables

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