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논문 기본 정보

자료유형
학술저널
저자정보
김혜림 (Korea Electric Power Research Institute) 박충렬 (Korea Electric Power Research Institute) 임성우 (Korea Electric Power Research Institute) 유승덕 (Korea Electric Power Research Institute) 오성용 (Korea Electric Power Research Institute) 현옥배 (Korea Electric Power Research Institute)
저널정보
한국초전도학회 Progress in superconductivity Progress in superconductivity 제10권 제2호
발행연도
2009.1
수록면
149 - 154 (6page)

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We measured and analyzed the quench development in coated conductor(CC) tapes. The CC was grown on hastelloy substrates and has an Ag protection layer. The tapes were subjected to simulated AC fault currents for quench development measurement. They were immersed in liquid nitrogen during the experiment. The quench resistance increased rapidly first, and the increase slowed down afterwards. It increased linearly with applied voltage at lower voltages, and depended less strongly on applied voltage at higher voltages. The resistance was compared with that of Au/YBCO films grown on sapphire substrates, and found to increase more monotonously than the latter. Data were analyzed quantitatively with the concept of heat transfer within the tape and the surrounding liquid nitrogen. A heat balance equation was derived and solved, taking into consideration temperature dependence of thermal parameters of the tapes. Solutions, together with values of thermal parameters taken from the literature, explained the data well. Cooling by liquid nitrogen affected the quench development considerably at lower applied voltages. Dependence on applied voltages could be also understood quantitatively.

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