• Title/Summary/Keyword: superconductors

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Manufacturing and characteristic if the magnet for generating a homogeneous magnetic field (균둥 자계 발생용 마그테트의 제작 및 특성)

  • 최세용;나완수;이세희;박일한
    • Proceedings of the Korea Institute of Applied Superconductivity and Cryogenics Conference
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    • 1999.02a
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    • pp.73-76
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    • 1999

  • Superconductors are dissipative when exposed to time-varying magnetic fields. To analyze the AC characteristics of the superconductor, one usually needs to know magnetization curves of it. A good magnetization curves can be obtained only in a homogeneous magnetic field. In this paper, we report the fabrication and test results of a homogeneous magnet, which aims to give background magnetic fields for the superconductor.

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Microstructure properties of internal tin processed Nb3Sn superconducting wires with pre-heating condition (내부확산법에 의한 Nb3Sn 초전도 선재의 예비 열처리 조건에 따른 미세조직 변화)

  • 하동우;오상수;하홍수;이남진;류강식;한일용;이준석
    • Proceedings of the Korea Institute of Applied Superconductivity and Cryogenics Conference
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    • 1999.02a
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    • pp.14-17
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    • 1999

  • Four designed $Nb_{3}$Sn superconductors have been fabricated in order to investigate the effect of pre-heat treatment for internal tin process. 3 types of sub-elements and 2 types of Sn reservers were fabricated. Diffusion of Sn is better in the strand divided Sn equally than in the strand had one large Sn reserver during pre heat-treatment.

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AC Loss Calculation in High Temperature Superconductors Using Slab model (Slab모델을 이용한 HTS AC 손실의 계산)

  • 최세용;주진호;류경우;나완수
    • Proceedings of the Korea Institute of Applied Superconductivity and Cryogenics Conference
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    • 2001.02a
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    • pp.102-103
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    • 2001

  • In this paper we calculate the AC Loss in the superconducting slab carrying ac transport current. Magnetic diffusion equation for computation of the electric field and current distribution are based on Maxwell's equations and non-linear constitutive equation. The E-J characteristics of superconductor are applied to computation. We will present the result of the high-temperature superconductor case comparison with the slab of low temperature superconductor.

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The Characteristics on AC Losses and Construction of Prototype High-Tc Superconducting Cable (Prototype 고온 초전도 케이블의 제작 및 교류손실)

  • 김영석;이병성;정종만;백승명;김상현
    • Proceedings of the Korea Institute of Applied Superconductivity and Cryogenics Conference
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    • 2000.02a
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    • pp.97-100
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    • 2000

  • Superconducting power cable is one of the most promising energy application of high-Tc superconductors (HTS). Thus, we investigated previously the characteristics on electrical and mechanical Bi-2223 Ag sheathed tape. And a prototype HTS cable have been designed, constructed and tested. The result shows that the transport current of HTS cable (1, 19-filament) in LN2 was 116[A], 240[A], respectively. And AC loss of HTS cable(19-filament) was 1.7 [W/m] in 240 [A] loading.

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Ceramics superconducting Energy Materials (세라믹 에너지 재료)

  • Lee, Sang-Heon
    • Proceedings of the KIEE Conference
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    • 2008.07a
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    • pp.1238-1239
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    • 2008

  • The high Tc supeconductor of ceramic oxides type was studied for finding its application field. The results reportaed in this paper on the stability of the ceramic superconductors and the resistance to ripening in the BCO liquid phase at elevated temperature opens a processing window for engineering the microstructure of large superconductor at the nanoscale level. The results suggest further that the introduction of highly efficient artifical pinning center to bulk ceramics superconductor.

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