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The Trapped Field Decay of YBCO Superconductor Composite with Times  

Lee, M.S. (Department of Advanced Materials Engineering Chungbuk National University)
Jang, G.E. (Department of Advanced Materials Engineering Chungbuk National University)
Jun, B.H. (Korea Atomic Energy Research Institute Superconductor Laboratory)
Ha, D.W. (Superconductivity Lab., Korea Electrotechnology Research institute)
Son, M.H. (Superconductivity Lab., Korea Electrotechnology Research institute)
Han, Y.H. (Transmission and Distribution Lab., Korea Electric Power Research Institute)
Park, B.J. (Transmission and Distribution Lab., Korea Electric Power Research Institute)
Publication Information
Progress in Superconductivity / v.12, no.2, 2011 , pp. 82-87 More about this Journal
Abstract
We studied the trapped field properties of bulk Y-Ba-Cu-O superconductors by applying 3 T of the permanent or $Nb_3Ti$ superconducting magnet. The 28 mm circular type of YBCO bulk superconductor was prepared and then hole at the center of bulk, parallel to the c-axis, was mechanically drilled. Typical size of hole in YBCO bulk was 10 mm in diameter. In order to examine the trapped field variation in terms of different impregnated materials, a hole in YBCO bulk was filled with resin and indium respectively. The trapped field decay due to flux flow was determined in terms of time. Our preliminary result indicates the trapped field value measured on the YBCO without hole after 30 minute by applying 3 T, was 6,500 G, which is much higher than that, 4,500 G, measured on YBCO with hole. Also, we confirmed that the tendency of a trapped field decrement with time was almost the same regardless of the impregnated materials in YBCO.
Keywords
YBCO; bulk; trapped field; artificial hole; impregnation; superconducting magnet;
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