[60] J. Y. Jang, Y. J. Hwang, M. S. Kim, W. Lee, and Y. S. Choi, “Design and Quench Protection Analysis of a 9 T NbTi Superconducting Magnet for a Large-Bore EMPS,” IEEE Trans. Appl. Supercond., vol. 30, no. 4, 2020.
[59] D. Park, Y. Choi, Y. Li, W. Lee, H. Tanaka, J. Bascunán, J. L. Ackerman, H. Tanaka, and Y. Iwasa, “Design of a Magnet and Gradient Coils for a Tabletop Liquid-Helium-Free, Persistent-Mode 1.5-T MgB-2 Osteoporosis MRI,” IEEE Trans. Appl. Supercond., vol. 30, no. 4, 2020.
[58] J. Kim, Y. Choi, W. Lee, G. Baek, T. K. Ko, S. Lee, and K. M. Park, “Experimental Test of the Magnetic Field Active Shimming Method for Air-Core HTS Quadruple Magnet,” IEEE Trans. Appl. Supercond., vol. 30, no. 4, 2020.
[57] Y. Choi, W. S. Lee, S. Song, H. Jeon, and T. K. Ko, “Optimal Design and Performance Evaluation of Dual-Capacitor Switching (DCS) Quench Protection System for Superconducting Magnet,” IEEE Trans. Appl. Supercond., vol. 30, no. 4, 2020.
[56] W. Lee, D. Park, Y. Iwasa, J. Kim, J. Lee, and D. G. Kim, “Quench Analysis of an LTS Quadrupole Triplet Magnet System for the IBS RAON In-Flight Fragment Separator,” IEEE Trans. Appl. Supercond., vol. 30, no. 4, 2020.
[55] Y. Li, D. Park, W. Lee, Y. Choi, H. Tanaka, J. Bascunán, and Y. Iwasa, “Screening-current-induced strain gradient on REBCO conductor: An experimental and analytical study with small coils wound with monofilament and striated multifilament REBCO tapes,” IEEE Trans. Appl. Supercond., vol. 30, no. 4, 2020.
[54] Y. Choi, J. Kim, G. Baek, S. Han, W. S. Lee, and T. K. Ko, “Measurement of magnetic field properties of a 3.0 T/m air-core HTS quadrupole magnet and optimal shape design to increase the critical current reduced by the incident magnetic field,” Electron., vol. 9, no. 3, 2020.
[53] Y. Choi, D. Park, Y. Li, H. Tanaka, W. Lee, J. Bascunán, and Y. Iwasa, “Persistent-mode operation and magnetization behavior of a solid-nitrogen-cooled MgB2 small-scale test coil towards a tabletop 1.5-T osteoporosis MRI,” Supercond. Sci. and Technol., vol. 33, no. 12, 2020.
[52] Y. Choi, W. S. Lee, S. Song, H. Jeon, and T. K. Ko, “A New Quench Protection System Using Dual-Capacitor Switching for Fast Energy Extraction From HTS Magnets,” IEEE Trans. Appl. Supercond., vol. 29, no. 5, 2019.
[51] J. Kim, G. Baek, W. S. Lee, S. Lee, Z. Zhang, and T. K. Ko, “A Novel Magnetic Field Active Shim Method for Air-Core Higherature Superconducting Quadruple Magnet,” IEEE Trans. Appl. Supercond., vol. 29, no. 5, 2019.
[50] Y. Do Chung, C. Y. Lee, W. S. Lee, and E. Y. Park, “Operating Characteristics for Different Resonance Frequency Ranges of Wireless Power Charging System in Superconducting MAGLEV Train,” IEEE Trans. Appl. Supercond., vol. 29, no. 5, 2019.
[49] G. Baek, J. Lee, W. S. Lee, Y. S. Yoon, and T. K. Ko, “Effect of Crossover Turns in Double-Pancake Winding on Magnetic Field Homogeneity of HTS NMR Magnet,” IEEE Trans. Appl. Supercond., vol. 29, no. 5, Aug. 2019.
[48] W. S. Lee, K. M. Park, Y. Chu, and K. P. Kim, “Analyzing a Cooling Experiment of a Prototype Thermosiphon System for a Single Crystal Silicon Ingot Growing Magnet,” IEEE Trans. Appl. Supercond., vol. 28, no. 3, 2018.
[47] Y. Do Chung, E. Y. Park, W. S. Lee, and J. Y. Lee, “Impact investigations and characteristics by strong electromagnetic field of wireless power charging system for electric vehicle under air and water exposure indexes,” IEEE Trans. Appl. Supercond., vol. 28, no. 3, 2018.
[46] W. S. Lee, K. M. Park, and Y. Do Chung, “Thermal Analysis of a Flux Pump with Simplified Conduction-Cooled Superconducting Magnet Model,” IEEE Trans. Appl. Supercond., vol. 28, no. 3, 2018,.
[45] S.Song, Y.Choi, W. S. Lee, K.Sim, Y.J.Hwang, J.Y.Jang, H.Kang, and T.K.Ko, “Analytic Study of the Active Quench Detection Method for High-Temperature Superconducting Magnet Using Resonance Circuit,” IEEE Trans. Appl. Supercond., vol. 28, no. 3, 2018.
[44] Y. J. Hwang, J. Y. Jang, S. G. Lee, J. Lee, and W. S. Lee, “Experimental study of the effect of the current sweep cycle on the magnetic field stability of a REBCO coil,” Cryogenics., vol. 89, pp. 163–167, 2018.
[43] S.Nam, W. S. Lee, J.Lee, H.Jeon, S.Han, Y.Choi, J.Lee, and T.K.Ko, “A study on the YBCO-Coated conductor current lead with asymmetric structure tape considering temperature distribution,” IEEE Trans. Appl. Supercond., vol. 27, no. 4, 2017.
[42] S.Nam, W. S. Lee, H.Lee, J.O.Kang, J.Kim, Y.K.Mo, S.Bang, O.Lee, H.Kang, and T.K.Ko, “Analysis of the Dielectric Characteristics of Gaseous Nitrogen According to Various Temperatures and Pressures for a Magnet System,” J. Supercond. Nov. Magn., vol. 30, no. 8, pp. 2347–2352, 2017.
[41] Y. Choi, W. S. Lee, S. Song, H. Jeon, H. Kang, and T. K. Ko, “Energy extraction system using dual-capacitor switching for quench protection of HTS magnet,” Prog. Supercond. Cryog., vol. 19, no. 3, pp. 49–53, 2017.
[40] G.Baek, J.Kim, W. S. Lee, S.Song, O.Lee, H.Kang, and T.K.Ko, “Field gradient calculation of HTS double-pancake coils considering the slanted turns and the splice,” Prog. Supercond. Cryog., vol. 19, no. 1, pp. 51–55, 2017.
[39] H.Jeon, W. S. Lee, J.Kim, G.Baek, S.Jeon, Y.S.Yoon, and T.K.Ko, “Investigation of electrical characteristics of no-insulation coil wound with surface-processed HTS tape,” Phys. C Supercond. its Appl., vol. 539, pp. 25–29, 2017.
[38] J.Kim, W. S. Lee, J.Kim, S.Song, S.Nam, H.Jeon, G.Baek, and T.K.Ko, “A simulation study on the variation of virtual NMR signals by winding, bobbin, spacer error of HTS magnet,” Prog. Supercond. Cryog., vol. 18, no. 3, pp. 21–24, 2016.
[37] S. Song, W. S. Lee, Y. G. Park, S. Nam, H. Jeon, G. Baek, M. C. Ahn, J. Lee, Y. Choi, and T. K. Ko, “Analysis of the Notch Effect on Flux Diverters for High-Temperature Superconducting Magnets,” IEEE Trans. Appl. Supercond., vol. 26, no. 4, 2016.
[36] Y. -O. Kim, H. Yonekawa, Y. Chu, K. -R. Park, H. -J. Kim, Y. -G. Park, W. -S. Lee, J. -H. Lee, and Y. -M. Kim, “Development and experimental evaluation of a prototype of the TF secondary quench detection system for KSTAR,” in Proceedings - Symposium on Fusion Engineering, 2016, vol. 2016-May. (Proceeding)
[35] Y. -O. Kim, H. Yonekawa, Y. Chu, K. -P. Kim, I. -S. Woo, J. -I. Song, H. -M. Lee, K. -R. Park, H. -J .Kim, Y. -G. Park, W. -S. Lee, J. -H. Lee, and Y. -M. Kim, “Development and Experimental Evaluation of a Prototype of the TF Secondary Quench Detection System for KSTAR Device,” IEEE Trans. Plasma Sci., vol. 44, no. 9, pp. 1758–1762, 2016.
[34] S. Nam, W. S. Lee, H. Lee, J. O. Kang, J. Kim, Y. K. Mo, S. Bang, O. Lee, H. Kang, and T. K. Ko, “Discharge Voltage Effects on High-TC Superconducting Tapes with Respect to Tensile Stress,” IEEE Trans. Appl. Supercond., vol. 26, no. 4, 2016.
[33] J. Lee, J. Kim, J. Kim, Y. G. Park, W. S. Lee, J. Lee, Y. D. Chung, K. -Y. Yoon, H. M. Kim, Y. S. Yoon, and T. K. Ko, “Experimental Analysis of Thermally and Magnetically Triggered Switch for High-Tc Superconducting Power Converting System,” IEEE Trans. Appl. Supercond., vol. 26, no. 4, 2016.
[32] W. S. Lee, Y. G. Park, J. Kim, S. Song, H. Jeon, Y.-G. Kim, H. Lee, and T. K. Ko, “Magnetic Field Stability Analysis on No-Insulation and Turn-to-Turn Soldered HTS Magnets under Sinusoidal Noise Operation,” IEEE Trans. Appl. Supercond., vol. 26, no. 4, 2016.
[31] Y. G. Park, W. S. Lee, J. Lee, S. Song, Y. J. Hwang, Y. D. Chung, and T. K. Ko, “Operational Characteristics of HTS Coils with Flux Diverters in Semipersistent Mode under Alternating Magnetic Field,” IEEE Trans. Appl. Supercond., vol. 26, no. 4, 2016.
[30] W. S. Lee, S. Nam, J. Kim, J. Lee, and T. K. Ko, “A Numerical and Experimental Analysis of the Temperature Dependence of the n-Index for 2G HTS Tape Surrounding the 77 K Temperature Range,” IEEE Trans. Appl. Supercond., vol. 25, no. 3, 2015.
[29] W. S. Lee, J. Lee, S. Song, Y. G. Park, H. Jin, S.Hahn, M.C.Ahn, and T.K.Ko, “Analysis of the current charge and discharge characteristics of a small-scale turn-to-turn soldered HTS coil,” IEEE Trans. Appl. Supercond., vol. 25, no. 3, 2015.
[28] J. Kim, Y. J. Hwang, W. S. Lee, T. S. Lee, J. Lee, and T. K. Ko, “Effects of AC disturbance on cowinding HTS coils according to the inserted materials,” IEEE Trans. Appl. Supercond., vol. 25, no. 3, 2015.
[27] Y. G. Park, W. S. Lee, H. J. Kim, Y. Do Chung, Y. S. Yoon, and T. K. Ko, “Evaluation of Electrical and Thermal Properties of Stacked YBCO Coated Conductors for Current Lead Application,” IEEE Trans. Appl. Supercond., vol. 25, no. 3, 2015.
[26] J.Lee, W. S. Lee, S.Nam, J.Kim, S.Lee, M.C.Ahn, Y.G.Park, S.Song, J.Lee, H.Jin, H.J.Kim, S.Kim, K.Hur, and T.K.Ko, “Fabrication and experimental analysis of 6.6 kV/100 a class single-phase superconducting fault current controller with superconducting DC reactor coil,” IEEE Trans. Appl. Supercond., vol. 25, no. 3, 2015.
[25] S. Nam, J. Lee, W. S. Lee, Y. G. Park, S. Song, H. Jin, and T. K. Ko, “Operational characteristics of a small-scale novel hybrid resistive-type SFCL with controlled power electronics,” IEEE Trans. Appl. Supercond., vol. 25, no. 3, 2015.
[24] S. Song, J. Lee, W. S. Lee, H. Jin, J. Lee, Y. J. Hwang, and T. K. Ko, “Quench detection method for HTS coils using electromagnetically coupled coils,” IEEE Trans. Appl. Supercond., vol. 25, no. 3.
[23] H. Jin, J. Lee, W. S. Lee, and T.K. Ko, “Statistical analysis for HTS coil considering inhomogeneous Ic distribution of HTS tape,” Prog. Supercond. Cryog., vol. 17, no. 2, pp. 41–44, 2015.
[22] J. Lee, Y. G. Park, W. S. Lee, H. C. Jo, Y. S. Yoon, and T. K. Ko, “Characteristics of joint resistance with different kinds of HTS tapes for heater trigger switch,” Prog. Supercond. Cryog., vol. 16, no. 1, pp. 32–35, 2014.
[21] J. Kim, W. S. Lee, H. Jin, and T. K. Ko, “Critical current characteristic of various 2G HTS multi-stacked tapes depending on the low external magnetic field,” Prog. Supercond. Cryog., vol. 16, no. 1, pp. 27–31, 2014.
[20] Y. G. Park, Y. J. Hwang, J. Y. Jang, H. J. Kim, W. S. Lee, H. C. Jo, H. M. Kim, Y. S. Yoon, and T. K. Ko, “Evaluation on electrical and thermal characteristics of multi-stacked HTS coated conductor with various stabilizers,” IEEE Trans. Appl. Supercond., vol. 24, no. 3, 2014.
[19] Y. G. Park, C. Y. Lee, Y. J. Hwang, W. S. Lee, J. Lee, H. C. Jo, Y. D. Chung, and T. K. Ko, “Experimental Study on Current Decay Characteristics of Persistent Current HTS Magnet by Alternating Magnetic Field,” Physics Procedia, 2014, vol. 58, pp. 268–271.
[18] M. C. Ahn, J. Jang, W. S. Lee, S. Hahn, and H. Lee, “Experimental Study on Hysteresis of Screening-Current-Induced Field in an HTS Magnet for NMR Applications,” IEEE Trans. Appl. Supercond., vol. 24, no. 3, Jun. 2014.
[17] H.C.Jo, W. S. Lee, Y.D.Chung, K.-Y.Yoon, H.Kim, Y.-S.Jo,T.K.Ko, and Y.S.Yoon, “Numerical analysis and design of damper layer for MW-class HTS synchronous wind turbine generator,” IEEE Trans. Appl. Supercond., vol. 24, no. 3, 2014.
[16] W. S. Lee, Y. J. Hwang, J. Kim, S. Nam, Y. G. Park, and T. K. Ko, “Quench protection for HTS current leads by adding connected HTS bridges,” IEEE Trans. Appl. Supercond., vol. 24, no. 3, 2014.
[15] S. Song, J. Lee, W. S. Lee, H. Jin, Y. J. Hwang, and T. K. Ko, “Voltage disturbance detection method for HTS tape using electromagnetically coupled coils,” Prog. Supercond. Cryog., vol. 16, no. 1, pp. 23–26, Mar. 2014.
[14] S. Nam, W. S. Lee, J. Lee, Y. J. Hwang, and T. K. Ko, “A numerical study on the feasibility evaluation of a hybrid type superconducting fault current limiter applying thyristors,” Prog. Supercond. Cryog., vol. 15, no. 4, pp. 26–29, 2013.
[13] W. S. Lee, J. Lee, S. Nam, and T. K. Ko, “A study on a modeling method about current-voltage characteristic of HTS tape considering resistance of stabilizer,” Prog. Supercond. Cryog., vol. 15, no. 3, pp. 9–12, 2013.
[12] W. S. Lee, M. C. Ahn, S. Y. Hahn, and T. K. Ko, “A study on an algorithm for finding magnetic center of an asymmetric HTS magnet with 3-axis mapper,” IEEE Trans. Appl. Supercond., vol. 23, no. 3, 2013.
[11] Y. J. Hwang, M. C. Ahn, T. S. Lee, W. S. Lee, and T. K. Ko, “Experimental study of the effects of alternating fields on HTS coils according to the winding insulation conditions,” Supercond. Sci. Technol., vol. 26, no. 8, 2013.
[10] T. S. Lee, W. S. Lee, S. Choi, H. C. Jo, H. J. Kim, J. Lee, J. S. Kang, O. J. Kwon, H. G. Lee, and T. K. Ko, “A study on the basic characteristics of persistent current mode operation for small scale high temperature superconducting coil with no-insulation winding method,” J. Korea Inst. Appl. Supercond. Cryog., vol. 14, no. 3, pp. 23–27, 2012.
[09] J. S. Kang, H. C. Jo, J. Y. Jang, Y. J. Hwang, J. Lee, W. S. Lee, Y. G. Park, and T. K. Ko, “A study on the winding method for reducing joints of the high temperature superconducting double pancake coil,” J. Korea Inst. Appl. Supercond. Cryog., vol. 14, no. 1, pp. 30–33, 2012.
[08] W. S. Lee, M. C. Ahn, S. Hahn, and T. K. Ko, “An algorithm to infer the central location of a solenoid coil for the mapping process based on harmonic analysis,” J. Korea Inst. Appl. Supercond. Cryog., vol. 14, no. 1, pp. 14–19, 2012.
[07] J. Y. Jang, W. S. Lee, J. S. Kang, H. C. Jo, Y. J. Hwang, J. B. Na, K. Sim, H. M. Kim, Y. S. Yoon, Y. D. Chung, K. Y. Yoon, and T. K. Ko, “Experimental study of the new type of HTS elements for current leads to be applied to the nuclear fusion devices,” IEEE Trans. Appl. Supercond., vol. 22, no. 3, 2012.
[06] J. Y. Jang, W. S. Lee, J. Lee, Y. J. Hwang, H. C. Jo, M. C. Ahn, K. Hur, and T. K. Ko, “Performance evaluation on fault current controller system for the applications of smart grid,” J. Korea Inst. Appl. Supercond. Cryog., vol. 14, no. 2, pp. 12–15, 2012.
[05] J. Lee, S. Choi, Y. J. Hwang, W. S. Lee, Y. C. Kim, and T. K. Ko, “Transition criteria for critical current measurement of high temperature superconductor in AC circumstance,” IEEE Trans. Appl. Supercond., vol. 22, no. 3, 2012.
[04] J. S. Kim, Y. J. Hwang, J. B. Na, S. J. Choi, Y. J. Kim, J. H. Lee, W. S. Lee, K. S. Chang, T. K. Ko, “A study on AC loss characteristics of asymmetric non-inductive coils with combination of superconducting wires,” J. Korea Inst. Appl. Supercond. Cryog., vol. 13, no. 1, pp. 17–21, 2011.
[03] D. G. Yang, J. B. Song, K. L. Kim, O. J. Kwon, W. S. Lee, T. K. Ko, and H. G. Lee, “A study on the quench initiation and propagation characteristics in GdBCO racetrack pancake coil for large-scale rotating machines,” J. Korea Inst. Appl. Supercond. Cryog., vol. 13, no. 3, pp. 24–30, 2011.
[02] W. S. Lee, S. J. Choi, J. Y. Jang, Y. J. Hwang, J. S. Kang, D. G. Yang, H. G. Lee, and T. K. Ko, “Design method for HTS wire length of the small scale resistive type superconducting fault current limiter considering system resistance,” J. Korea Inst. Appl. Supercond. Cryog., vol. 13, no. 3, pp. 14–18, 2011.
[01] J. Y. Jang, Y. J. Kim, J. B. Na, S. Choi, W. S. Lee, C. Y. Lee, D. K. Park, and T. K. Ko, “Fabrication and small scale short circuit tests of hybrid fault current limiter employing asymmetric non-inductive coil and fast switch,” J. Korea Inst. Appl. Supercond. Cryog., vol. 13, no. 1, pp. 41–45, 2011.