CUED Publications database

Magnetic Shielding above 1 T at 20 K with Bulk, Large Grain YBCO Tubes Made by Buffer-Aided Top Seeded Melt Growth

Wera, L and Fagnard, JF and Namburi, DK and Shi, Y and Vanderheyden, B and Vanderbemden, P (2016) Magnetic Shielding above 1 T at 20 K with Bulk, Large Grain YBCO Tubes Made by Buffer-Aided Top Seeded Melt Growth. IEEE Transactions on Applied Superconductivity, 27.

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Abstract

© 2002-2011 IEEE.YBCO tubes of ∼10 mm diameter closed at one extremity were engineered by a buffer-aided top seeded melt growth fabrication process. These tubes can act as efficient 'dc' magnetic shields and are observed to reduce axial flux densities of 1.5 T by a factor of 100 at 20 K. Such performances are comparable in magnitude to the record threshold inductions reported for bulk MgB2 and Bi-2212 materials at lower temperatures. Magnetic shielding measurements for open and closed tubes at 77 K also show that the presence of the cap improves substantially the shielding performance at the closed extremity since it reduces the penetration through the open end. This fabrication technique is extremely promising for shielding 'dc' stray fields generated by high temperature superconductor magnets operated in a temperature range obtained by cryocoolers, liquid hydrogen (20 K), or liquid neon (27 K).

Item Type: Article
Subjects: UNSPECIFIED
Divisions: Div C > Materials Engineering
Depositing User: Cron Job
Date Deposited: 17 Jul 2017 19:19
Last Modified: 07 Sep 2017 01:44
DOI: