Publications

[217] S Yang, W Song, J Park, G Kim, JY Huang, S Hahn, S Choi, H Kang, G Hahn, “Development of a 5-Axis Winding Method for Saddle-Shaped Coils Using Coated ReBCO High Temperature Superconductors,” IEEE Trans. Appl. Supercond. , vol. 34, p. 4801304, 2024.

[216] Y Yan, D Jiang, P Song, J Park, S Hahn, Y Tan, T Qu, “Screening-current-induced magnetic fields and strains in a compact REBCO coil in self field and background field,” Superconductivity , vol. 9, p. 100082, 2024.

[215] SH Park, G Choi, G Kim, J Jo, B Lee, G Kim, K Park, YH Lee, S Hahn, “Characterization of broadband Purcell filters with compact footprint for fast multiplexed superconducting qubit readout,” Appl. Phys. Lett. , vol. 124, no. 4, p. 044003, 2024.

[214] SH Park, B Lee, K Seo, S Hahn, “Sensitivity Analysis of Manufacturing Uncertainty Errors in Superconducting Quantum Circuits,” IEEE Trans. Appl. Supercond. , vol. 34, no. 3, p. 1700305, 2024.

[213] JY Jang, YJ Hwang, H Yang, J Kim, S Hahn, H Yeom, M Ahn, SG Lee, “Genetic-Algorithm-based Room-Temperature Shimming and Long-term Operational Protocol for a KBSI 400 MHz all-HTS NMR magnet,” IEEE Trans. Appl. Supercond. , vol. 34, no. 5, p. 4300805, 2024.

[212] S Yang, W Song, J Park, G Kim, JY Huang, S Hahn, S Choi, H Kang, G Hahn, “Development of a 5-Axis Winding Method for Saddle-Shaped Coils Using ReBCO Coated Conductorsusing Coated ReBCO High Temperature Superconductors,” IEEE Trans. Appl. Supercond. , vol. 34, no. 5, p. 4801304, 2024.

[211] W Lee, H Yang, D Park, YJ Hwang, C Im, J Kim, S Hahn, SG Lee, “Exploring the Effects of Partial Electrical Connectors on HTS Coils: A Case Study of Insulated Coil and Paraffin-Impregnated NI Coil,” IEEE Trans. Appl. Supercond. , vol. 34, no. 5, p. 4602205, 2024.

[210] G Kim, W Jung, J Koo, J Park, H Park, JK Cha, JT Lee, W Jang, SH Park, Y Yan, J Kim, J Bang, G Hahn, S Choi, H Kang, S Hahn, “Experimental Study for Modified Lumped-Circuit Model to Analyze Saddle-Shaped No-Insulation HTS Coil Operated in Overcurrent Situation,” IEEE Trans. Appl. Supercond. , vol. 34, no. 5, p. 4600905, 2024.

[209] G Kim, H Park, C Im, J Park, J Koo, W Jung, JT Lee, W Jang, JK Cha, Y Yan, J Kim, J Bang, G Hahn, S Choi, H Kang, S Hahn, “Distributed-Circuit Method for Replication of Fast-Ramping of Saddle-Shaped REBCO Dipole Magnet Wound With Two-Tape Bundled Conductor,” IEEE Trans. Appl. Supercond. , vol. 34, no. 5, p. 4000405, 2024.

[208] A Musso, J Bang, N Riva, Y Yan, JT Lee, S Hahn, “The Roles of Contact Resistivity and Tape Architecture on Transverse Resistance of an NI HTS Coil,” IEEE Trans. Appl. Supercond. , vol. 34, no. 5, p. 4600705, 2024.

[207] S Eun, SH Park, K Seo, K Choi, S Hahn, “Shape optimization of superconducting transmon qubits for low surface dielectric loss,” J. Phys. D: Appl. Phys. , vol. 56, no. 50, p. 505306, 2023.

[206] Y Yan, J Kim, U Bong, W Jang, G Kim, J Park, S Hahn, “Measurement and analysis of winding stresses in dry-wound pancake coils considering nonlinear compressive behaviors,” Supercond. Sci. Technol , vol. 36, no. 11, p. 115019, 2023.

[205] M Maeda, A Matsumoto, G Nishijima, YU Heo, S Hahn, S Lee, S Choi, JH Kim, “Performance of MgB2 superconducting wire fabricated with non-identical Mg particles,” J. Alloys Compd. , vol. 954, p. 170148, 2023.

[204] G Kim, J Park, J Bang, G Hahn, SH Park, C Im, H Park, J Kim, S Choi, H Kang, S Hahn, S Lee, “Investigation on nonuniform current density and shape deformation affecting magnetic field performance of a saddle-shaped no-insulation HTS cosine-theta dipole magnet,” Supercond. Sci. Technol , vol. 36, no. 8 , p. 084002, 2023.

[203] J Bang, J Park, K Choi, G Kim, S Hahn, “A numerical method to calculate screening current-dependent self and mutual inductances of REBCO coils,” Supercond. Sci. Technol , vol. 36, no. 8, p. 085003, 2023.

[202] S Noguchi, T Mato, S Hahn, “Inductive Voltage of Insert HTS Coils Due to Coil Deformation for Ultra-High Magnetic Field Generation,” IEEE Trans. Appl. Supercond. , vol. 33, no. 5, p. 4300905, 2023.

[201] K Seo, S Hahn, IH Park, “Hole and dot sensitivity analysis and level set-based topology optimization of superconducting systems operating under critical current density,” Struct. Multidisc. Optim. , vol. 66, no. 5, p. 117, 2023.

[200] K Seo, J Yoon, JK Cha, IH Park, S Hahn, “Design Optimization of HTS Field Coils for High Power Density Motors Based on Continuum Sensitivity Analysis,” IEEE Trans. Appl. Supercond. , vol. 33, no. 5, p. 5202805, 2023.

[199] B Afif, S Oh, M Jeong, J Park, W Shin, U Jo, R Handito, J Park, G Kim, G Hahn, S Choi, S Hahn, H Kang, “Degradation Characteristics of REBCO Tapes according to Electrical Breakdown,” IEEE Trans. Appl. Supercond. , vol. 33, no. 5, p. 8001005, 2023.

[198] S Brialmont, J Dular, L Wera, JF Fagnard, B Vanderheyden, C Geuzaine, S Hahn, A Patel, P Vanderbemden, “Magnetic shielding up to 0.67 T at 77 K using a stack of high temperature superconducting tape annuli of 26 mm bore,” Supercond. Sci. Technol , vol. 36, no. 5, p. 054004, 2023.

[197] S Oh, HW Kim, S Nam, Y Chu, DK Oh, H Choi, JT Lee, W Kim, YS Jeong, H Chang, J Lee, S Hahn, “Preliminary Design Study on Non-Twisted HTS Conductor for Fusion Applications,” IEEE Trans. Appl. Supercond. , vol. 33, no. 5, p. 4801505, 2023.

[196] J Bang, A Musso, N Riva, JT Lee, G Kim, W Jang, S Hahn, “Experiment and Analysis on Temperature-Dependent Electric Contact Resistivity of an NI HTS Coil,” IEEE Trans. Appl. Supercond. , vol. 33, no. 5, p. 6602105, 2023.

[195] J Yoon, U Bong, JK Cha, J Park, S Hahn, “Maximum Torque Per Ampere Control Scheme Considering NI HTS Field Coil Behavior for Synchronous Motor With Salient Rotor Core,” IEEE Trans. Appl. Supercond. , vol. 33, no. 5, p. 5202305, 2023.

[194] W Jang, J Bang, J Kim, G Kim, JT Lee, HS Noh, MK Sun, H Lee, S Hahn, S Lee, “An Experimental Study on Manipulation of Individual Coil Current in Parallel-Connected HTS Pancake Coils,” IEEE Trans. Appl. Supercond. , vol. 33, no. 5, p. 4602105, 2023.

[193] J Park, G Kim, G Hahn, D Kim, T Ha, J Bang, J Kim, S Shin, S Hahn, “Estimation of Screening Current Induced Field on Short Period Planar HTS Undulator,” IEEE Trans. Appl. Supercond. , vol. 33, no. 5, p. 4100505, 2023.

[192] U Bong, J Yoon, JK Cha, J Kim, RE Kim, JG Kim, S Hahn, “Compensation of NI Behaviors in Synchronous Motors With NI HTS Field Winding Using Harmonic Current Injection,” IEEE Trans. Appl. Supercond. , vol. 33, no. 5, p. 5201905, 2023.

[191] JY Jang, YJ Hwang, J Kim, S Song, G Kim, K Choi, S Hahn, M Ahn, S Lee, “Experimental Study of a Room-Temperature Shimming Technology Employing Genetic Algorithm for NMR/MRI Superconducting Magnets,” IEEE Trans. Appl. Supercond. , vol. 33, no. 5, p. 4300705, 2023.

[190] JT Lee, G Kim, J Kim, J Bang, C Im, W Jang, K Choi, M Yoon, WS Kim, S Hahn, “Experimental and Equivalent Circuit Analysis Approach to Estimate Contact Resistances on Different Sections in a D-shaped NI HTS Coil,” IEEE Trans. Appl. Supercond. , vol. 33, no. 5, p. 4603205, 2023.

[189] H Park, J Park, G Kim, K Choi, J Bang, S Hahn, “Computing the Non-Uniform Current Effects on the Magnetic Field in Sector Coil Dipoles,” IEEE Trans. Appl. Supercond. , vol. 33, no. 5, p. 4900705, 2023.

[188] S Noguchi, T Mato, K Kim, S Hahn, “Electromagnetic behavior simulation of REBCO pancake coils considering REBCO tape rotation under high magnetic field,” IEEE Trans. Appl. Supercond. , vol. 33, no. 5, p. 4300405, 2023.

[187] J Choi, Q Liu, C Lee, J Mun, J Yoon, G Kim, U Bong, J Kim, S Hahn, K Sim, S Kim, “Thermal Analysis of Leakage Currents of No-Insulation HTS Racetrack Coils Using a Three-Dimensional Turn-Distributed Equivalent Circuit FEA Model,” IEEE Trans. Appl. Supercond. , vol. 33, no. 5, p. 5201106, 2023.

[186] G Kim, U Bong, C Im, J Yoon, H Park, J Bang, C Lee, J Kim, S Hahn, “Analysis of Nonuniform Contact Resistivity Distribution on No-Insulation HTS Racetrack Coil,” IEEE Trans. Appl. Supercond. , vol. 33, no. 5, p. 4601305, 2023.

[185] JK Cha, J Yoon, U Bong, S Hahn, “A Design Study on HTS Halbach Array for Field Coil of 40 MW Ship Propulsion Motor,” IEEE Trans. Appl. Supercond. , vol. 33, no. 5, p. 5200705, 2023.

[184] SH Park, D Baek, I Park, S Hahn, “Design of Scalable Superconducting Quantum Circuits Using Flip-Chip Assembly,” IEEE Trans. Appl. Supercond. , vol. 33, no. 5, p. 1701206, 2023.

[183] M Maeda, JH Choi, JC Knott, JH Kim, G Hahn, H Kang, S Hahn, S Choi, “Disorder anisotropy of layered structure in multi-band MgB2 superconducting materials with high critical current performance,” J. Alloys Compd. , vol. 934, no. 10, p. 167873, 2023.

[182] J Bang, J Kim, JT Lee, G Kim, J Park, SH Park, S Noguchi, S Hahn, “A customized electric heater to mitigate screening current by optimal control on temperature distribution in a high-temperature superconductor coil,” J. Appl. Phys. , vol. 132, no. 18, p. 183911, 2022.

[181] S Brialmont, JF Fagnard, B Vanderheyden, F mazaleyrat, S Hahn, A Patel, P Vanderbemden, “Measurement of Magnetic Hysteresis Loops of the Ni-5at.%W Alloy Substrate as a Function of Temperature in a Stack of 2G HTS-Coated Conductor Annuli,” IEEE Trans. Appl. Supercond. , vol. 32, no. 8, p. 6602710, 2022.

[180] U Bong, K Choi, J Kim, J Bang, JT Lee, C Im, J Park, J Yoon, G kim, H Ku, W kang, S Hahn, “Design, construction, and operation of a 2 T 240 mm conduction-cooled defect-irrelevant winding (RE) Ba2Cu3O7-x magnet,” Rev. Sci. Instrum. , vol. 93, p. 073302, 2022.

[179] A Musso, J Bang, U Bong, M Breschi, C Im, G Kim, J Kim, J Park, S Hahn, “Analysis of a No-Insulation HTS pancake coil including multiple resistive joints,” IEEE Trans. Appl. Supercond. , vol. 32, no. 6, p. 4604505, 2022.

[178] J Lee, J Mun, J Kim, K Sim, S Hahn, S Kim, “A Study on the Electrical Contact Resistance and Thermal Conductivity of Soldered-Metal Insulation Coil With Conduction Cooling,” IEEE Trans. Appl. Supercond. , vol. 32, no. 6, p. 4604805, 2022.

[177] J Bang, SH Park, JH Park, G Kim, JT Lee, K Kim, S Hahn, D Larbalestier, “A Real-time Monitoring System for Investigating Electromagnetic Behaviors of An HTS Coil,” IEEE Trans. Appl. Supercond. , vol. 32, no. 6, p. 9001505, 2022.

[176] SW Jung, J Yoon, K Choi, J Bang, U Bong, S Hahn, “Comparative Design Study of HTS Synchronous Motor With Inner and Outer Rotor Type Based on Multi-Objective Optimization,” IEEE Trans. Appl. Supercond. , vol. 32, no. 6, p. 5202305, 2022.

[175] J Bang, JH Park, SH Park, JT Lee, C Im, G Kim, S Hahn, “An HTS Magnet with Individually Controllable Coil Currents Energized by a Single Power Source,” IEEE Trans. Appl. Supercond. , vol. 32, no. 6, p. 4603005, 2022.

[174] G Kim, J Bang, C Im, K Choi, U Bong, JT Lee, S Hahn, “Fast Current Distribution Simulation Method for No-insulation HTS Coil with Defects,” IEEE Trans. Appl. Supercond. , vol. 32, no. 6, p. 4602905, 2022.

[173] JT Lee, J Bang, G Kim, J Kim, JH Park, C Im, WS Jang, HW Kim, Y Ryu, H Lee, S Oh, S Hahn, “Test and Analysis of Laboratory-scale D-shaped Co-wound No-insulation HTS Single Pancake Coil for TF Coil Application,” IEEE Trans. Appl. Supercond. , vol. 32, no. 6, p. 4602605, 2022.

[172] J Yoon, U Bong, JT Lee, SW Jung, S Hahn, “Investigation on Time-Varying Behavior of NI HTS Field Coil for Synchronous Motors Considering Armature Reaction and Slotting Effect,” IEEE Trans. Appl. Supercond. , vol. 32, no. 6, p. 5201505, 2022.

[171] JH Park, J Kim, G Hahn, D Kim, T Ha, J Bang, S Hahn, S Shin, “Parametric Optimization of Undulator Field for Short Period NI HTS Planar Undulator,” IEEE Trans. Appl. Supercond. , vol. 32, no. 6, p. 4101105, 2022.

[170] S Noguchi, S Hahn, “A newly developed screening current simulation method for REBCO pancake coils based on extension of PEEC model,” Supercond. Sci. Technol , vol. 35, no. 4, p. 044005, 2022.

[169] G Kim, SH Park, J Bang, C Im, J kim, J Yoon, KJ Han, S Noguchi, S Hahn, “Experimental Study and Frequency Domain Analysis on Metal-Insulation HTS Coil,” IEEE Trans. Appl. Supercond. , vol. 32, no. 5, p. 4600505, 2022.

[168] M Maeda, YU Heo, JH Choi, D Patel, SH Kim, S Hahn, JH Kim, S Choi, “Interfacial reaction and side effect of MgB2 superconducting material through low-rotation mechanical milling,” Ceram. Int. , vol. 48, np. 5, p. 6539-6548, 2021.

[167] G Kim, A Musso, J Bang, JT Lee, C Im, K Choi, J Kim, M Breschi, KJ Han, S Hahn, “A numerical method for spatially-distributed transient simulation to replicate nonlinear 'defect-irrelevant' behaviors of no-insulation HTS coil,” Supercond. Sci. Technol. , vol. 34, p. 115004, 2021.

[166] U Bong, J Kim, J Bang, J Park, KJ Han, S Hahn, “"Defect-irrelevant-winding" no-insulation (RE)Ba2Cu3O7-x pancake coil in conduction-cooling operation,” Supercond. Sci. Technol. , vol. 34, p. 085003, 2021.

[165] JT Lee, SH Park, J Park, J Kim, YG Kim, HW Kim, HS Noh, H Lee, S Oh, S Hahn, “Preliminary Conceptual Design Study on HTS Toroidal Field Coil for Compact High Magnetic Field Tokamak,” IEEE Trans. Appl. Supercond. , vol. 31, p. 4202207, 2021.

[164] RE Kim, JG Lee, JM Seo, S Hahn, “2-D Analysis Method for Synchronous Reluctance Motors Considering End-Plate Effect,” IEEE Access , vol. 9, p. 52008-52014, 2021.

[163] SH Park, J Bang, S An, S Hahn, “Design and Performance Analysis of Hexagonal Transmon Qubit in a Superconducting Circuit,” IEEE Trans. Appl. Supercond. , vol. 31, p. 1700205, 2021.

[162] J Park, J Bang, U Bong, J Kim, D Abraimov, S Hahn, “Parametric Study on Effect of Friction and Overbanding in Screening Current Stress of LBC Magnet,” IEEE Trans. Appl. Supercond. , vol. 31, p. 4603205, 2021.

[161] K Choi, U Bong, J Kim, J Park, JT Lee, J Bang, G Kim, SW Jung, S Hahn, “Upper Limit Estimation of Resistive Heating Made by No-Insulation HTS Magnet Having Defects,” IEEE Trans. Appl. Supercond. , vol. 31, p. 4603005, 2021.

[160] S An, C Im, J Bang, J Kim, U Bong, JT Lee, G Kim, KJ Han, S Hahn, “Fast Distributed Simulation of “Defect-Irrelevant” Behaviors of No-Insulation HTS Coil,” IEEE Trans. Appl. Supercond. , vol. 31, p. 4601605, 2021.

[159] Q Liu, S Lee, K Choi, S Hahn, “Minimum Volume Optimal Design Method of Hybrid MRI Magnet,” IEEE Trans. Appl. Supercond. , vol. 31, p. 4400305, 2021.

[158] T Mato, S Hahn, S Noguchi, “Mechanical Damage Protection Method by Reducing Induced Current in NI REBCO Pancake Coils During Quench Propagation,” IEEE Trans. Appl. Supercond. , vol. 31, p. 4602405, 2021.

[157] C Im, G Kim, J Bang, K Choi, S An, KJ Han, S Hahn, “Mesh Dependency on a Partial Element Equivalent Circuit Model for an NI HTS Coil,” IEEE Trans. Appl. Supercond. , vol. 31, p. 4901105, 2021.

[156] U Bong, C Im, J Yoon, S An, SW Jung, KJ Han, S Hahn, “Investigation on Key Parameters of NI HTS Field Coils for High Power Density Synchronous Motors,” IEEE Trans. Appl. Supercond. , vol. 31, p. 5200505, 2021.

[155] S Noguchi, T Imai, D Park, S Hahn, Y Iwasa, “A simple screening current simulation method using equivalent circuit model for REBCO pancake coils,” Supercond. Sci. Technol. , vol. 33, p. 115005, 2020.

[154] X Hu, M Small, K Kim, K Kim, K Bhattarai, A Polyanskii, K Radcliff, J Jaroszynski, U Bong, J Park, S Hahn, D Larbalestier, “Analyses of the plastic deformation of coated conductors deconstructed from ultra-high field test coils,” Supercond. Sci. Technol. , vol. 33, p. 095012, 2020.

[153] U Bong, S An, J Park, S Hahn, “Numerical Studies on Mechanical Behavior of Dry-Wound HTS Racetrack Coil,” IEEE Trans. Appl. Supercond. , vol. 30, p. 4901805, 2020.

[152] J Bang, JT Lee, K Choi, SH Park, U Bong, S An, C Im, J Park, J Kim, K Bhattarai, S Hahn, “A Numerical Method to Calculate Spatial Harmonic Coefficients of Magnetic Fields Generated by Screening Currents in an HTS Magnet,” IEEE Trans. Appl. Supercond. , vol. 30, p. 4901405, 2020.

[151] C Im, S An, J Bang, J Kim, K Bhattarai, KL Kim, K Kim, S Hahn, “An Inverse Calculation Study on Post-Quench Behavior of a No-Insulation REBCO Insert,” IEEE Trans. Appl. Supercond. , vol. 30, p. 4703205, 2020.

[150] K Radcliff, R Wlash, D Larbalestier, S Hahn, “The Effect of Reinforcement Substrate Alloy Selection on Mechanical Properties of REBCO Coated Conductors,” IOP conf. ser., Mater. sci. eng. , vol. 756, p. 012023, 2020.

[149] K Kim, K Bhattarai, KL Kim, H Bai, L Dixon, T Painter, Y Bong, D Larbalestier, S Hahn, “Design and Performance Estimation of a 20 T 46 mm No-Insulation All-REBCO User Magnet,” IEEE Trans. Appl. Supercond. , vol. 30, p. 4602205, 2020.

[148] JT Lee, J Kim, H Lee, Y Chu, KP Kim, J Kim, U Bong, J Park, K Park, S Hahn, “AC Loss Analysis on the KSTAR PF1L Coil Based on the Long-Term Commissioning Shot Data,” IEEE Trans. Appl. Supercond. , vol. 30, p. 4701005, 2020.

[147] S An, K Choi, S Noguchi, C Im, J Bang, U Bong, J Kim, S Hahn, “A Feasibility Study on “Magnetic Dam” to Absorb Magnetic Energy in NI HTS Magnet During Quench,” IEEE Trans. Appl. Supercond. , vol. 30, p. 4701705, 2020.

[146] K Bhattarai, K Kim, K Kim, K Radcliff, X Hu, C Im, T Painter, L Dixon, D Larbalestier, SG Lee, S Hahn, “Understanding quench in no-insulation (NI) REBCO magnets through experiments and simulations,” Supercond. Sci. Technol. , vol. 33, p. 035002, 2020.

[145] J Park, G Hahn, J Bang, U Bong, K Choi, JT Lee, S Hahn, “A Design Study on No-Insulation HTS Isochronous Cyclotron Magnet for Carbon Ion Therapy,” IEEE Trans. Appl. Supercond. , vol. 30, p. 4400705, 2020.

[144] JY Jang, YJ Hwan, JH Han, M Ahn, H Yang, S Hahn, J Bang, SG lee, “Reproducibility of the field homogeneity of a metal-clad no-insulation all-REBCO magnet with a multi-layer ferromagnetic shim,” Supercond. Sci. Technol. , vol. 33, p. 025005, 2020.

[143] J Kim, Y Kim, S Yoon, K Shin, J Lee, JS Jung, JT Lee, J Kim, D Kim, J Yoo, H Lee, S Moon, S Hahn, “Design, construction, and operation of an 18 T 70 mm no-insulation (RE)Ba2Cu3O7-x magnet for an axion haloscope experiment,” Rev. Sci. Instrum. , vol. 91, p. 023314, 2020.

[142] S Hahn, K Kim, K Kim, X Hu, T Painter, I Dixon, S Kim, K R Bhattarai, S Noguchi, J Jaroszynski, D Larbalestier, “45.5-tesla direct-current magnetic field generated with a high-temperature superconducting magnet,” Nature , vol. 570, no. 7762, p. 496-499, 2019.

[141] J Park, G Hahn, U Bong, S Kwon, H Lee, M Cho, J Kim, Y Chu, M Jung, K Han, S Hahn, “Conceptual Design of a 5 T 200 mm 1 T/s Ramping NbTi Synchrotron Magnet for Cancer Treatment,” IEEE Trans. Appl. Supercond. , vol. 29, p. 4004005, 2019.

[140] U Bong, S An, J Voccio, J Kim, JT Lee, J Lee, KJ Han, H Lee, S Hahn, “A Design Study on 40 MW Synchronous Motor With No-Insulation HTS Field Winding,” IEEE Trans. Appl. Supercond. , vol. 29, p. 5203706, 2019.

[139] JG Kim, S Hahn, J Choi, YK Semertzidis, S An, A Kim, “A Design Study on a Multibillet HTS Induction Heater With REBCO Racetrack Coils,” IEEE Trans. Appl. Supercond. , vol. 29, p. 4603205, 2019.

[138] S Noguchi, D Park, Y Choi, J Lee, Y Li, PC Michael, J Bascuñán, S Hahn, Y Iwasa, “Quench Analyses of the MIT 1.3-GHz LTS/HTS NMR Magnet,” IEEE Trans. Appl. Supercond. , vol. 29, p. 4301005, 2019.

[137] PC Michael, D Park, YH Choi, J Lee, Y Li, J Bascunan, S Noguchi, S Hahn, “Assembly and Test of a 3-Nested-Coil 800-MHz REBCO Insert (H800) for the MIT 1.3 GHz LTS/HTS NMR Magnet,” IEEE Trans. Appl. Supercond. , vol. 29, p. 4300706, 2019.

[136] D Park, J Bascunan, PC Michael, J Lee, YH Choi, Y Li, S Hahn, Y Iwasa, “MIT 1.3-GHz LTS/HTS NMR Magnet: Post Quench Analysis and New 800-MHz Insert Design,” IEEE Trans. Appl. Supercond. , vol. 29, p. 4300804, 2019.

[135] M Cho, S Noguchi, J Bang, J Kim, U Bong, J Lee, S An, K Bhattarai, K Kim, K Kim, C Im, K Han, S Hahn, “Combined Circuit Model to Simulate Post-Quench Behaviors of No-Insulation HTS Coil,” IEEE Trans. Appl. Supercond. , vol. 29, p. 4901605, 2019.

[134] J Bang, S Kim, J Jang, Y Hwang, M Cho, J Kim, J Lee, M Ahn, S Lee, S Hahn, “Field Measurement and Analysis of a 3 T 66 mm No-Insulation HTS NMR Magnet with Screening Current and Manufacturing Uncertainty Considered,” IEEE Trans. Appl. Supercond. , vol. 29, p. 4601305, 2019.

[133] M Yoon, S Lee, SH Park, J Lee, GW Hong, K Choi, S Hahn, SG Lee, S Hahn, “Field Mapping of the Joint-less HTS Solenoid Magnet in a Persistent Current Mode Operation,” IEEE Trans. Appl. Supercond. , vol. 29, p. 4603504, 2019.

[132] S Noguchi, H Ueda, S Hahn, A Ishiyama, Y Iwasa, “A simple screening current-induced magnetic field estimation method for REBCO pancake coils,” Supercond. Sci. technol. , vol. 32, p. 045007, 2019.

[131] S Noguchi, S Hahn, A Ishiyama, Y Iwasa, “A simple protection evaluation method for no-insulation REBCO pancake coils during local normal-state transition,” Supercond. Sci. technol. , vol. 32, p. 045001, 2019.

[130] S Kim, C Lee, J Bang, S Hahn, “Manipulation of screening currents in an (RE) Ba2Cu3O7-x superconducting magnet,” Materials Research Express , vol.6, p.026004, 2018.

[129] MC Ahn, H Yang, K Kim, JY Jang, SG Lee, S Hahn, “Optimal Design Methodology of Multiwidth HTS Magnet for Minimum Wire Consumption,” IEEE Trans. Appl. Supercond. , vol. 28, p. 4602905, 2018.

[128] S Noguchi, K Kim, S Hahn, “Simulation on Electrical Field Generation by Hall Effect in No-Insulation REBCO Pancake Coils,” IEEE Trans. Appl. Supercond. , vol. 28, p. 4901805, 2018.

[127] JY Jang, JH Han, C Kim, YJ Hwang, S Hahn, MC Ahn, SG Lee, “A High-Resolution Magnetometer Over a Wide Homogeneity Range,” IEEE Trans. Appl. Supercond. , vol.28, p. 9001005, 2018.

[126] L Changyung, H Seungyong, B Jeseok, C Jeonwook, “Current overshoot operation of a REBCO magnet to mitigate SCF,” Progress in Superconductivity and Cryogenics , vol. 20, p. 65-69, 2018.

[125] S Noguchi, S Hahn, H Ueda, SB Kim, A Ishiyama, “An Extended Thin Approximation Method to Simulate Screening Current Induced in REBCO Coils,” IEEE transactions on magnetics , vol. 54, p. 7201904, 2017.

[124] JY Jang, S Yoon, S Hahn, YJ Hwang, J Kim, KH Shin, K Cheon, K Kim, S Hahn, “Design, construction and 13 K conduction-cooled operation of a 3 T 100 mm stainless steel cladding all-REBCO magnet,” Supercond. Sci. technol. , vol. 30, p. 105012, 2017.

[123] K Kim, K Kim, KR Bhattarai, K Radcliff, JY Jang, YJ Hwang, SG Lee, S Hahn, “Quench behavior of a no-insulation coil wound with stainless steel cladding REBCO tape at 4.2 K,” Supercond. Sci. technol. , vol. 30, p. 075001, 2017.

[122] K Kim, KR Bhattarai, JY Jang, YJ Hwang, K Kim, S Yoon, SG Lee, S Hahn, “Design and performance estimation of a 35 T 40 mm no-insulation all-REBCO user magnet,” Supercond. Sci. technol. , vol. 30, p. 065008, 2017.

[121] JB Song, SY Hahn, “'Leak Current'correction for critical current measurement of no-insulation HTS coil,” Progress in Superconductivity and Cryogenics. , vol. 19, p48-52, 2017.

[120] S Kim, S Hahn, K Kim, and D Larbalestier, “Method for generating linear current-field characteristics and eliminating charging delay in noinsulation superconducting magnets,” Supercond. Sci. technol. , vol. 30, p. 035020, 2017.

[119] J Ling, JP Voccio, S Hahn, T Qu, J Bascunan, and Y Iwasa, “A persistent-mode 0.5T solid-nitrogen-cooled MgB2 magnet for MRI,” Supercond. Sci. technol. , vol. 30, p. 024011, 2017.

[118] J Bascunan, P Michael, S Hahn, T Lecrevisse, and Y Iwasa, “Construction and Test Results of Coil 2 of a Three-Coil 800-MHz REBCO Insert for the 1.3-GHz High-Resolution NMR Magnet,” IEEE Trans. Appl. Supercond. , vol. 27, p. 4300504, 2017.

[117] J Lu, R Goddard, K Han, and S Hahn, “Contact resistance between two REBCO tatpes upder load and load cycles,” Supercond. Sci. technol. , vol. 30, p. 045005, 2017.

[116] Y. J. Hwang, S. Hahn, S. Lee, J. Y. Jang, J. H. Han, H. Lee, J. Kim, H. Yeom, S. Yoon, K. Kim, and M. C. Ahn, “A Study on Mitigation of Screening Current Induced Field with a 3-T 100-mm ConductionCooled Metallic Cladding REBCO Magnet,” IEEE Trans. Appl. Supercond. , vol. 27, p. 4701605, 2017.

[115] A. Patel, S. Hahn, J. Voccio, A. Baskys, S. C. Hopkins, and B. A. Glowacki, “Magnetic levitation using a stack of high temperature superconducting tape annuli,” Supercond. Sci. technol. , vol. 30, p. 024007, 2017.

[114] P. C. Michael, T. Qu, J. Voccio, J. Bascunan, S. Hahn, and Y. Iwasa, “A REBCO Persistent-Current Switch (PCS): Test Results and Switch Heater Performance,” IEEE Trans. Appl. Supercond. , vol. 27, p. 0500705, 2017.

[113] T. Qu, P. C. Michael, J. Bascunan, T. Lecrevisse, M. Guan, S. Hahn, and Y. Iwasa, “Test of an 8.66-T REBCO Insert Coil With Overbanding Radial Build for a 1.3-GHz LTS/HTS NMR Magnet,” IEEE Trans. Appl. Supercond., vol. 27, p. 4600605, 2017.

[112] K. R. Bhattarai, K. Kim, S. Kim, S. Lee, and S. Hahn, “Quench Analysis of a Multi-Width No-Insulation 7 T 78 mm REBCO Magnet,” accepted for publication at IEEE Trans. Appl. Supercond., 2017.

[111] Y. H. Choi, J. B. Song, D. G. Yang, Y. G. Kim, S. Hahn, and H. G. Lee, “A novel no-insulation winding technique of high temperaturesuperconducting racetrack coil for rotating applications: A progress report in Korea university,” Rev. Sci. Instrum., vol. 87, p. 104704, 2016.

[110] T. Qu, P. C. Michael, J. Voccio, J. Bascunan, S. Hahn, and Y. Iwasa, “Persistent-current switch for pancake coils of rare earth-barium-copperoxide high-temperature superconductor: Design and test results of a double-pancake coil operated in liquid nitrogen (77-65 K) and in solid nitrogen (60-57 K),” Appl. Supercond. Lett., vol. 109, p. 082601, 2016.

[109] S. Hahn, K. Radcliff, K. Kim, S. Kim, X. Hu, K. Kim, D. V. Abraimov, and J. Jaroszynski, “’Defect-irrelevant’ behavior of a no-insulation pancake coil wound with REBCO tapes containing multiple defects,” Supercond. Sci. Technol., vol. 29, p. 105017, 2016.

[108] F. X. Li, J. P. Voccio, M. Sammartino, M. C. Ahn, S. Hahn, J. Bascunan, and Y. Iwasa, “A Theoretical Design Approach for Passive Shimming of a Magic-Angle-Spinning NMR Magnet,” IEEE Trans. Appl. Supercond., vol. 26, p. 4300404, 2016.

[107] S. Yoon, J. Kim, H. Lee, S. Hahn, and S.-H. Moon, “26T 35mm all GdBa2Cu3O7-x multi-width no-insulation superconducting magnet,” Supercond. Sci. Technol., vol. 29, p. 04LT04, 2016.

[106] K. L. Kim, S. Yoon, K. Cheon, J. Kim, H. Lee, S. Lee, D. L. Kim, and S. Hahn, “400-MHz/60-mm All-REBCO Nuclear Magnetic Resonance Magnet: Magnet Design,” IEEE. Trans. Appl. Supercond., vol. 26, p. 4302604, 2016.

[105] J. Kim, S. Yoon, K. Cheon, K. H. Shin, S. Hahn, D. L. Kim, S. Lee, H. Lee, and S.-H. Moon, “Effect of Resistive Metal Cladding of HTS Tape on the Characteristic of No-Insulation Coil,” IEEE. Trans. Appl. Supercond., vol. 26, p. 4601906, 2016.

[104] J. Bascunan, S. Hahn, T. Lecrevisse, J. Song, D. Miyagi, and Y. Iwasa, “An 800-MHz all-REBCO Insert for the 1.3-GHz LTS/HTS NMR Magnet ProgramA Progress Report,” IEEE. Trans. Appl. Supercond., vol. 26, p. 4300205, 2016.

[103] F. X. Li, J. P. Voccio, M. Sammartino, J. Jalali, M. C. Ahn, S. Hahn, J. Bascunan, and Y. Iwasa, “High-Resolution Magnetic Field Mapping System With an NMR Probe,” IEEE. Trans. Appl. Supercond., vol. 26, p. 9001104, 2016.

[102] M. Guan, S. Hahn, J. Bascunan, X. Wang, P. Gao, Y. Zhou, and Y. Iwasa, “A Parametric Study on Overband Radial Build for a REBCO 800-MHz Insert of a 1.3-GHz LTS/HTS NMR Magnet,” IEEE. Trans. Appl. Supercond., vol. 26, p. 4301205, 2016.

[101] Y. G. Kim, S. Hahn, K. L. Kim, D. G. Yang, and H. G. Lee, “Design consideration and optimization procedure for a no-insulation multi-width REBCO magnet,” Curr. Appl. Phys., vol. 15, p. 1134–1138, 2015.

[100] J. B. Song, S. Hahn, T. Lecrevisse, J. Voccio, J. Bascunan, and Y. Iwasa, “Over-current quench test and self-protecting behavior of a 7 T/78 mm multi-width no-insulation REBCO magnet at 4.2 K,” Supercond. Sci. Technol., vol. 28, p. 114001, 2015.

[99] F. X. Li, J. P. Voccio, M. C. Ahn, S. Hahn, J. Bascunan, and Y. Iwasa, “An analytical approach towards passive ferromagnetic shimming design for a high resolution NMR magnet,” Supercond. Sci. Technol., vol. 28, p. 075006, 2015.

[98] K. L. Kim, S. Hahn, Y. H. Choi, Y. G. Kim, D. H. Kang, K. Kazikawa, and H. G. Lee, “Feasibility Study for Elimination of the Screening Current Induced Fields in HTS Coil,” J. Supercond. Nov. Magn., vol. 28, no. 1, pp. 83–88, 2015.

[97] 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, p. 4603704, 2015.

[96] S. Hahn, J. Song, Y. Kim, K. J. Han, H. Lee, Y. Iwasa, and Y. Chu, “Design Study on a 100-kA/20-K HTS Cable for Fusion Magnets,” IEEE. Trans. Appl. Supercond., vol. 25, no. 3, p. 4801605, 2015.

[95] M. C. Ahn, J. Jang, S. Hahn, Y.-G. Kim, and H. Lee, “Field Mapping and Automated Shimming of an HTS Magnet by “Internal” Active Shim Coils Located in the Bore of the Magnet,” IEEE. Trans. Appl. Supercond., vol. 25, no. 3, p. 4300804, 2015.

[94] Y. Kim, S. Hahn, J. Voccio, J. Song, J. Bascunan, and Y. Iwasa, “Strain in YBCO Double-Pancake Coil With Stainless Steel Overband Under External Magnetic Field,” IEEE. Trans. Appl. Supercond., vol. 25, no. 3, p. 4300504, 2015.

[93] Y. H. Choi, S. Hahn, H.-J. Shin, D.-H. Kang, and H. Lee, “Experimental and Analytical Studies on Electromagnetic Behaviors of the GdBCO Racetrack Coils in a Time-Varying Magnetic Field,” IEEE. Trans. Appl. Supercond., vol. 25, no. 3, p. 4602006, 2015.

[92] D. G. Yang, S. Hahn, Y. Kim, Y. H. Choi, H.-J. Shin, and H. Lee, “Numerical Analysis on Characteristic Resistance of No-Insulation and PartialInsulation NbTi Solenoids,” IEEE. Trans. Appl. Supercond., vol. 25, no. 3, p. 4900305, 2015.

[91] T. Wang, S. Noguchi, X. Wang, I. Arakawa, K. Minami, K. Monma, A. Ishiyama, S. Hahn, and Y. Iwasa, “Analyses of Transient Behaviors of No-Insulation REBCO Pancake Coils During Sudden Discharging and Overcurrent,” IEEE. Trans. Appl. Supercond., vol. 25, no. 3, p. 4603409, 2015.

[90] J.-B. Song, S. Hahn, Y. Kim, D. Miyagi, J. Voccio, J. Bascunan, H. Lee, and Y. Iwasa, “Dynamic Response of No-Insulation and Partial-Insulation Coils for HTS Wind Power Generator,” IEEE. Trans. Appl. Supercond., vol. 25, no. 3, p. 5202905, 2015.

[89] K. Kajikawa, G. V. Gettliffe, Y. Chu, D. Miyagi, T. L´ecrevisse, S. Hahn, J. Bascunan, and Y. Iwasa, “Designs and Tests of Shaking Coils to Reduce Screening Currents Induced in HTS Insert Coils for NMR Magnet,” IEEE. Trans. Appl. Supercond., vol. 25, no. 3, p. 4300305, 2015.

[88] Y. Iwasa, J. Bascunan, S. Hahn, J. Voccio, Y. Kim, T. L´ecrevisse, J. Song, and K. Kajikawa, “A High-Resolution 1.3-GHz/54-mm LTS/HTS NMR Magnet,” IEEE. Trans. Appl. Supercond., vol. 25, no. 3, p. 4301205, 2015.

[87] T. L´ecrevisse, J. Bascunan, S. Hahn, Y. Kim, J. Song, and Y. Iwasa, “Tape-to-Tape Joint Resistances of a Magnet Assembled From (RE)BCO Double-Pancake Coils ,” IEEE. Trans. Appl. Supercond., vol. 25, no. 3, p. 6602505, 2015.

[86] S. Hahn, J. Song, Y. Kim, T. L´ecrevisse, Y. Chu, J. Voccio, J. Bascunan, and Y. Iwasa, “Construction and Test of 7-T/68-mm Cold-Bore Multiwidth No-Insulation GdBCO Magnet ,” IEEE. Trans. Appl. Supercond., vol. 25, no. 3, p. 4600405, 2015.

[85] J. Ling, J. P. Voccio, S. Hahn, Y. Kim, J. Song, J. Bascunan, and Y. Iwasa, “Construction and Persistent-Mode Operation of MgB2 Coils in the Range 10-15 K for a 0.5-T/240-mm Cold Bore MRI Magnet,” IEEE. Trans. Appl. Supercond., vol. 25, no. 3, p. 4601705, 2015.

[84] J. Voccio, S. Hahn, Y. Kim, J. Song, K. Kajikawa, S. Noguchi, J. Bascunan, and Y. Iwasa, “A 1.5-T Magic-Angle Spinning NMR Magnet: 4.2-K Performance and Field Mapping Test Results,” IEEE. Trans. Appl. Supercond., vol. 25, no. 3, p. 4301005, 2015.

[83] S. Hahn, Y. Kim, J. Song, J. P. Voccio, Y. Chu, J. Bascunan, M. Tomita, and Y. Iwasa, “Operation of a 130-MHz/9-mm Compact HTS Annulus Magnet With a Micro-NMR Probe,” IEEE. Trans. Appl. Supercond., vol. 25, no. 3, p. 4300905, 2015.

[82] J. H. Seo, K. J. Han, H. S. Choi, S.-H. Lee, S. Hahn, and H. Lee, “Comparison Study on Harmonic Loss of MW-Class Wind Generators With HTS Field Winding,” IEEE. Trans. Appl. Supercond., vol. 24, no. 3, p. 5200105, 2014.

[81] 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, p. 4301605, 2014.

[80] Y. Kim, S. Hahn, J. Ling, K. L. Kim, J. Song, J. Voccio, J. Bascunan, and Y. Iwasa, “Partial-Insulation Winding Technique for NbTi Coils,” IEEE. Trans. Appl. Supercond., vol. 24, no. 3, p. 4700505, 2014.

[79] J. Bascunan, S. Hahn, Y. Kim, J. Song, and Y. Iwasa, “90-mm/18.8-T All-HTS Insert Magnet for 1.3 GHz LTS/HTS NMR Application: Magnet Design and Double-Pancake Coil Fabrication,” IEEE. Trans. Appl. Supercond., vol. 24, no. 3, p. 4300904, 2014.

[78] J. Song, S. Hahn, Y. Kim, J. Voccio, J. Ling, J. Bascunan, H. Lee, and Y. Iwasa, “HTS Wind Power Generator: Electromagnetic Force Between No-Insulation and Insulation Coils Under Time-Varying Conditions,” IEEE. Trans. Appl. Supercond., vol. 24, no. 3, p. 5201005, 2014.

[77] S. Hahn, Y. Kim, J. Song, J. Voccio, J. Ling, J. Bascunan, and Y. Iwasa, “A 78-mm/7-T Multi-Width No-Insulation ReBCO Magnet: Key Concept and Magnet Design,” IEEE. Trans. Appl. Supercond., vol. 24, no. 3, p. 4602705, 2014.

[76] K. L. Kim, S. Hahn, Y. Kim, D. G. Yang, J.-B. Song, J. Bascunan, H. Lee, and Y. Iwasa, “Effect of Winding Tension on Electrical Behaviors of a NoInsulation ReBCO Pancake Coil,” IEEE. Trans. Appl. Supercond., vol. 24, no. 3, p. 4600605, 2014.

[75] D. G. Yang, S. Hahn, Y. Kim, K. L. Kim, J.-B. Song, J. Bascunan, H. Lee, and Y. Iwasa, “Characteristic Resistance of No-Insulation and PartialInsulation Coils With Nonuniform Current Distribution,” IEEE. Trans. Appl. Supercond., vol. 24, no. 3, p. 7700405, 2014.

[74] J. Ling, J. Voccio, S. Hahn, Y. Kim, J. Song, J. Bascunan, and Y. Iwasa, “Development of a 0.5-T/240-mm MgB2 MRI Magnet: Assembly Design and Module Coils,” IEEE. Trans. Appl. Supercond., vol. 24, no. 3, p. 4400805, 2014.

[73] J. Voccio, S. Hahn, Y. Kim, J. Ling, J. Song, J. Bascunan, and Y. Iwasa, “A 1.5-T/75-mm Magic-Angle-Spinning NMR Magnet,” IEEE. Trans. Appl. Supercond., vol. 24, no. 3, p. 4300704, 2014.

[72] S. Hahn, Y. Kim, J. P. Voccio, J. Song, J. Bascunan, M. Tomita, and Y. Iwasa, “Temporal Enhancement of Trapped Field in a Compact NMR Magnet Comprising YBCO Annuli,” IEEE. Trans. Appl. Supercond., vol. 24, no. 3, p. 4300805, 2014.

[71] S. Noguchi, R. Itoh, S. Hahn, and Y. Iwasa, “Numerical Simulation of Superconducting Coil Wound With No-Insulation NbTi Wire,” IEEE. Trans. Appl. Supercond., vol. 24, no. 3, p. 4900504, 2014.

[70] S. Noguchi, S. Hahn, and Y. Iwasa, “Passive Shimming for MagicAngle-Spinning NMR,” IEEE. Trans. Appl. Supercond., vol. 24, no. 3, p. 4400904, 2014.

[69] S. Noguchi, S. B. Kim, S. Hahn, and Y. Iwasa, “Passive Shimming by Eliminating Spherical Harmonics Coefficients of all Magnetic Field Components Generated by Correction Iron Pieces,” IEEE. Trans. Magn., vol. 50, no. 2, p. 7014904, 2014.

[68] Y. Iwasa and S. Hahn, “First-cut design of an all-superconducting 100tesla DC magnet,” Appl. Phys. Lett., vol. 103, p. 253507, 2013.

[67] S. Hahn, Y. Kim, D. K. Park, K. Kim, J. Voccio, J. Bascunan, and Y. Iwasa, “No-Insulation Multi-Width Winding Technique for High Temperature Superconducting Magnet,” Appl. Phys. Lett., vol. 103, p. 173511, 2013.

[66] Y. Iwasa, S. Hahn, J. Voccio, D. K. Park, Y. Kim, and J. Bascunan, “Persistent-mode high-temperature superconductor shim coils: a design concept and experimental results of a prototype Z1 high-temperature superconductor shim,” Appl. Phys. Lett., vol. 103, p. 052607, 2013.

[65] O. J. Kwon, K. L. Kim, Y. H. Choi, H. J. Shin, S. Hahn, Y. Iwasa, and H. G. Lee, “Effects of turn-to-turn compactness in the straight sections of HTS racetrack coils on thermal and electrical characteristics,” Supercond. Sci. Technol., vol. 26, p. 085025, 2013.

[64] Y. Kim, J. Bascunan, T. Lecrevisse, S. Hahn, J. Voccio, D. K. Park, and Y. Iwasa, “YBCO and Bi2223 Coils for High Field LTS/HTS NMR Magnets: HTS-HTS Joint Resistivity,” IEEE Trans. Appl. Supercond., vol. 23, p. 6800704, 2013.

[63] J. Bascunan, S. Hahn, Y. Kim, and Y. Iwasa, “A New High-Temperature Superconducting (HTS) 700-MHz Insert Magnet for a 1.3-GHz LTS/HTS NMR Magnet,” IEEE Trans. Appl. Supercond., vol. 23, p. 4400304, 2013.

[62] J. Ling, J. Voccio, Y. Kim, S. Hahn, J. Bascunan, D. K. Park, and Y. Iwasa, “Monofilament MgB2 Wire for a Whole-Body MRI Magnet: Superconducting Joints and Test Coils,” IEEE Trans. Appl. Supercond., vol. 23, p. 6200304, 2013.

[61] J. Voccio, S. Hahn, D. K. Park, J. Ling, Y. Kim, J. Bascunan, D. K. Park, and Y. Iwasa, “Magic-Angle Spinning NMR Magnet Development: Field Analysis and Prototypes,” IEEE Trans. Appl. Supercond., vol. 23, p. 4300804, 2013.

[60] M. C. Ahn, S. Hahn, and H. Lee, “3-D Field Mapping and Active Shimming of a Screening-Current-Induced Field in an HTS Coil using Harmonic Analysis for High-Resolution NMR Magnets,” IEEE Trans. Appl. Supercond., vol. 23, p. 4400804, 2013.

[59] S. Hahn, Y. Kim, J. Ling, J. Voccio, D. K. Park, J. Bascunan, H.-J. Shin, H. Lee, and Y. Iwasa, “No-insulation Coil Under Time-Varying Condition:Magnetic Coupling with External Coil,” IEEE Trans. Appl. Supercond., vol. 23, p. 4601705, 2013.

[58] S. Hahn, Y. Kim, J. Voccio, D. K. Park, B. Gagnon, J. Bascunan, M. Tomita, and Y. Iwasa, “Bulk and Plate Annulus Stacks for Compact NMR Magnets: Trapped Field Characteristics and Active Shimming Performance,” IEEE Trans. Appl. Supercond., vol. 23, p. 4300504, 2013.

[57] W. S. Lee, M. C. Ahn, S. 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, p. 4900204, 2013.

[56] Y. J. Hwang, S. Choi, H. C. Jo, Y. H. Choi, T. J. Kim, S. Hahn, and T. K. Ko, “Evaluation on AC Electrical Characteristics of No-Insulation Coil for Power Devices,” IEEE Trans. Appl. Supercond., vol. 23, p. 4700604, 2013.

[55] H.-J. Shin, K. L. Kim, Y. H. Choi, O. J. Kwon, S. Hahn, Y. Iwasa, and H. Lee, “Effects of Impregnating Materials on Thermal and Electrical Stabilities of the HTS Racetrack Pancake Coils Without Turn-to-turn Insulation,” IEEE Trans. Appl. Supercond., vol. 23, p. 7700404, 2013.

[54] X. Wang, S. Hahn, Y. Kim, J. Bascunan, J. Voccio, H. Lee, and Y. Iwasa, “Turn-to-turn contact characteristics for equivalent circuit model of no-insulation ReBCO pancake coil,” Supercond. Sci. Technol., vol. 26, p. 035012, 2013.

[53] B. Gagnon, S. Hahn, D. K. Park, J. Voccio, K. Kim, J. Bascunan, and Y. Iwasa, “Field performance of a prototype compact YBCO “annulus” magnet for micro-NMR spectroscopy,” Physica C, vol. 486, pp. 26–31, 2013.

[52] Y. Iwasa, J. Bascunan, S. Hahn, and D. K. Park, “Solid-Cryogen Cooling Technique for Superconducting Magnets for NMR and MRI,” Phys. Procedia., vol. 36, pp. 1348–1353, 2012.

[51] J. Bascunan, S. Hahn, D. K. Park, Y. Kim, and Y. Iwasa, “On the 600 MHz HTS Insert for a 1.3 GHz NMR Magnet,” IEEE Trans. Appl. Supercond., vol. 22, p. 4302104, 2012.

[50] S. Choi, H. C. Jo, Y. J. Hwang, S. Hahn, and T. K. Ko, “A Study on the No Insulation Winding Method of the HTS Coil,” IEEE Trans. Appl. Supercond., vol. 22, p. 4904004, 2012.

[49] Y.-G. Kim, S. Hahn, K. L. Kim, O. J. Kwon, and H. Lee, “Investigation of HTS Racetrack Coil Without Turn-to-Turn Insulation for Superconducting Rotating Machines,” IEEE Trans. Appl. Supercond., vol. 22, p. 5200604, 2012.

[48] D. K. Park, J. Ling, M. Rindfleisch, J. Voccio, S. Hahn, J. Bascunan, M. Tomsic, and Y. Iwasa, “MgB2 for MRI Magnets: Test Coils and Superconducting Joints Results,” IEEE Trans. Appl. Supercond., vol. 22, p. 4400305, 2012.

[47] S. Hahn, D. K. Park, J. Voccio, J. Bascunan, and Y. Iwasa, “No-Insulation (NI) HTS Inserts for >1 GHz LTS/HTS NMR Magnets,” IEEE Trans. Appl. Supercond., vol. 22, p. 4302405, 2012.

[46] S. Hahn, D. K. Park, K. Kim, J. Bascunan, and Y. Iwasa, “No-Insulation (NI) Winding Technique for Premature-Quench-Free NbTi MRI Magnets,” IEEE Trans. Appl. Supercond., vol. 22, p. 4501004, 2012.

[45] S. Hahn, J. Voccio, D. K. Park, K. Kim, T. Masaru, J. Bascunan, and Y. Iwasa, “A Stack of YBCO Annuli, Thin Plate and Bulk, for MicroNMR Spectroscopy,” IEEE Trans. Appl. Supercond., vol. 22, p. 4302204, 2012.

[44] Y. H. Choi, S. Hahn, J. B. Song, D. G. Yang, and H. G. Lee, “Partial Insulation of GdBCO Single Pancake Coils for Protectio-free HTS Power Applications,” Supercond. Sci. Technol., vol. 24, p. 125013, 2011.

[43] J. Bascunan, S. Hahn, D. K. Park, and Y. Iwasa, “A 1.3-GHz LTS/HTS NMR Magnet – A Progress Report,” IEEE Trans. Appl. Supercond., vol. 21, pp. 2092–2095, 2011.

[42] Y. S. Choi, D. L. Kim, and S. Hahn, “Progress on the Development of a 5 T HTS Insert Magnet for GHz Class NMR Applications,” IEEE Trans. Appl. Supercond., vol. 21, pp. 1644–1648, 2011.

[41] S. B. Kim, M. Imai, T. Riki, and S. Hahn, “Study on Optimized Configuration of Stacked HTS Bulk Annuli for Compact NMR Applications,” IEEE Trans. Appl. Supercond., vol. 21, pp. 2080–2083, 2011.

[40] D. K. Park, S. Hahn, J. Bascunan, and Y. Iwasa, “Active Protection of an MgB2 Test Coil,” IEEE Trans. Appl. Supercond., vol. 21, pp. 2402–2405, 2011.

[39] S. Hahn, J. Voccio, S. Bermond, D. K. Park, J. Bascunan, S. B. Kim, T. Masaru, and Y. Iwasa, “Field Performance of an Optimized Stack of YBCO Square “Annuli” for a Compact NMR Magnet,” IEEE Trans. Appl. Supercond., vol. 21, pp. 1632–1635, 2011.

[38] S. Hahn, D. K. Park, J. Bascunan, and Y. Iwasa, “HTS Pancake Coils without Turn-to-Turn Insulation,” IEEE Trans. Appl. Supercond., vol. 21, pp. 1592–1595, 2011.

[37] S. Lee, S. Hahn, and K. Sim, “A Ferromagnetic Shimming Method for NMR/MRI Magnets Adopting Two Consecutive Optimization Techniques: Linear Programming and Evolution Strategy,” J. Supercond. Nov. Magn., vol. 24, pp. 1037–1043, 2011.

[36] S. Hahn, J. Bascunan, W. Yao, and Y. Iwasa, “Two HTS Options for a 600 MHz Insert of a 1.3 GHz LTS/HTS NMR Magnet: YBCO and BSCCO,” Physica C, vol. 470, pp. 1721–1726, 2010.

[35] Y. Iwasa, J. Bascunan, S. Hahn, M. Tomita, and W. Yao, “HighTemperature Superconducting Magnets for NMR and MRI: R&D Activities at the MIT Francis Bitter Magnet Laboratory,” IEEE Trans. Appl. Supercond., vol. 20, pp. 718–721, 2010.

[34] N. Y. Kwon, H. S. Kim, K. L. Kim, S. Hahn, H.-R. Kim, O.-B. Hyun, H. M. Kim, W. S. Kim, C. Park, and H. G. Lee, “The Effects of a Stabilizer Thickness of the YBCO Coated Conductor (CC) on the Quench/Recovery Characteristics,” IEEE Trans. Appl. Supercond., vol. 20, pp. 1246–1249, 2010.

[33] W. Yao, J. Bascunan, S. Hahn, and Y. Iwasa, “MgB2 Coils for MRI Applications,” IEEE Trans. Appl. Supercond., vol. 20, pp. 756–759, 2010.

[32] S. Hahn, S. B. Kim, M. C. Ahn, J. Voccio, J. Bascunan, and Y. Iwasa, “Trapped Field Characteristics of Stacked YBCO Thin Plates for Compact NMR Magnets: Spatial Field Distribution and Temporal Stability,” IEEE Trans. Appl. Supercond., vol. 20, pp. 1037–1040, 2010.

[31] W. Yao, J. Bascunan, S. Hahn, and Y. Iwasa, “A Superconducting Joint Technique for MgB2 Round Wires,” IEEE Trans. Appl. Supercond., vol. 19, pp. 2261–2264, 2009.

[30] S. B. Kim, T. Nakano, R. Takano, and S. Hahn, “Study on Trapped Field Characteristics of HTS Bulk Annuli with Iron Rings for Ferromagnetic Shimming of a Compact NMR Magnet,” IEEE Trans. Appl. Supercond., vol. 19, pp. 2273–2276, 2009.

[29] M. C. Ahn, T. Yagai, S. Hahn, R. Ando, J. Bascunan, and Y. Iwasa, “Spatial and Temporal Variations of a Screening Current Induced Magnetic Field in a Double-Pancake HTS Insert of an LTS/HTS NMR Magnet,” IEEE Trans. Appl. Supercond., vol. 19, pp. 2269–2272, 2009.

[28] S. Choi, T. Kiyoshi, S. Hahn, and M. Sugano, “Stress Analysis of a High Temperature Superconductor Coil Wound with Bi-2223/Ag Tapes for High Field HTS/LTS NMR Magnet Application,” IEEE Trans. Appl. Supercond., vol. 19, pp. 2237–2240, 2009

[27] S. Hahn, M. C. Ahn, J. Bascunan, W. Yao, and Y. Iwasa, “Nonlinear Behavior of a Shim Coil in an LTS/HTS NMR Magnet with an HTS Insert Comprising Double-Pancake HTS-Tape Coils,” IEEE Trans. Appl. Supercond., vol. 19, pp. 2285–2288, 2009.

[26] S. Hahn, M. C. Ahn, E. S. Bobrov, J. Bascunan, and Y. Iwasa, “An Analytical Technique to Elucidate Field Impurities from Manufacturing Uncertainties of an Double Pancake Type HTS Insert for HighField LTS/HTS NMR Magnets,” IEEE Trans. Appl. Supercond., vol. 19, pp. 2281–2284, 2009.

[25] S. B. Kim, R. Takano, T. Nakano, M. Imai, and S. Hahn, “Characteristics of the Magnetic Field Distribution on Compact NMR Magnets using Cryocooled HTS Bulks,” Physica C, vol. 469, pp. 1811–1815, 2009.

[24] S. Hahn, J. Bascunan, H. Lee, E. S. Bobrov, W. Kim, M. C. Ahn, and Y. Iwasa, “Operation and performance analyses of 350 and 700 MHz low/high- temperature superconductor nuclear magnetic resonance magnets: A march toward operating frequencies above 1 GHz,” J. Appl. Phys., vol. 105, p. 024501, 2009.

[23] S. Kwak, M. Park, W. Kim, S. Hahn, S. Lee, J. Lee, K. Choi, J. Han, K. Seong, H. Jung, and S. Hahn, “The Optimal Design of a 600 kJ SMES Magnet based on Stress and Magnetic Field Analysis,” IEEE Trans. Appl. Supercond., vol. 18, pp. 713–716, 2008.

[22] W. Yao, J. Bascunan, W. Kim, S. Hahn, H. Lee, and Y. Iwasa, “A Solid Nitrogen Cooled MgB2 “Demonstration” Coil for MRI Applications,” IEEE Trans. Appl. Supercond., vol. 18, pp. 912–915, 2008.

[21] S. Hahn, J. Bascunan, W. Kim, E. S. Bobrov, H. Lee, and Y. Iwasa, “Field Mapping, NMR Lineshape, and Screening Currents Induced Field Analyses for Homogeneity Improvement in LTS/HTS NMR Magnets,” IEEE Trans. Appl. Supercond., vol. 18, pp. 856–859, 2008.

[20] S. Hahn, J. Bascunan, H. Lee, E. S. Bobrov, W. Kim, and Y. Iwasa, “Development of a 700 MHz Low-/High- Temperature Superconductor Nuclear Magnetic Resonance Magnet: Test Results and Spatial Homogeneity Improvement,” Rev. Sci. Instrum., vol. 79, p. 026105, 2008.

[19] J. Bascunan, W. Kim, S. Hahn, E. S. Bobrov, H. Lee, and Y. Iwasa, “An LTS/HTS NMR Magnet Operated in the Range 600-700 MHz,” IEEE Trans. Appl. Supercond., vol. 17, pp. 1446–1449, 2007.

[18] W. Kim, F. Trillaud, I. C. Ang, S. Hahn, and Y. Iwasa, “Normal Zone Propagation in YBCO Winding Pack Models,” IEEE Trans. Appl. Supercond., vol. 17, pp. 2478–2481, 2007.

[17] W. Yao, W. Kim, S. Hahn, J. Bascunan, H. Lee, and Y. Iwasa, “A Digital Flux Injector Operated with a 317-MHz NMR Magnet,” IEEE Trans. Appl. Supercond., vol. 17, pp. 1450–1453, 2007.

[16] M. J. Park, S. Y. Kwak, W. S. Kim, S. W. Lee, S. Hahn, J. K. Lee, J. H. Han, K. D. Choi, H. K. Jung, K. C. Seong, and S. Y. Hahn, “Stress Analysis of HTS Magnet for a 600 kJ SMES,” IEEE Trans. Appl. Supercond., vol. 17, pp. 1994–1997, 2007.

[15] J. Bascunan, H. Lee, E. S. Bobrov, S. Hahn, and Y. Iwasa, “A 500 MHz/200 mm RT Bore Solid Neon Cooled Nb3Sn MRI Magnet – A Status Report,” IEEE Trans. Appl. Supercond., vol. 16, pp. 1535–1538, 2006.

[14] J. Bascunan, H. Lee, E. S. Bobrov, S. Hahn, Y. Iwasa, M. Tomsic, and M. Rindfleisch, “A 0.6 T/650 mm RT Bore Solid Nitrogen Cooled MgB2 Demonstration Coil for MRI – A Status Report,” IEEE Trans. Appl. Supercond., vol. 16, pp. 1427–1430, 2006.

[13] J. Bascunan, H. Lee, E. S. Bobrov, S. Hahn, and Y. Iwasa, “A 700 MHz LTS/HTS NMR Magnet – A Status Report,” IEEE Trans. Appl. Supercond., vol. 16, pp. 1531–1534, 2006.

[12] K. Ryu, S. D. Hwang, S. W. Kim, and S. Hahn, “Influence of Tapes Critical Currents and Current Distributions on AC Loss Measurement in a Multi-Tape Conductor,” IEEE Trans. Appl. Supercond., vol. 15, pp. 1611– 1614, 2005.

[11] Y. Iwasa, J. Jankowski, S. Hahn, H. Lee, J. Bascunan, J. Reeves, A. Knoll, Y. Xie, and V. Selvamanickam, “Stability and Quench Protection of Coated YBCO Composite Tape,” IEEE Trans. Appl. Supercond., vol. 15, pp. 1683–1686, 2005.

[10] Y. Iwasa, S. Hahn, M. Tomita, H. Lee, and J. Bascunan, “A PersistentMode Magnet Comprised of YBCO Annuli,” IEEE Trans. Appl. Supercond., vol. 15, pp. 2352–2355, 2005.

[9] R. Mai, S. Hahn, H. Lee, J. Bascunan, and Y. Iwasa, “A Digital Flux Injector for NMR Magnets,” IEEE Trans. Appl. Supercond., vol. 15, pp. 2348– 2351, 2005.

[8] H. Lee, E. S. Bobrov, J. Bascunan, S. Hahn, and Y. Iwasa, “An HTS Insert for Phase 2 of a 3-Phase 1-GHz LTS/HTS NMR Magnet,” IEEE Trans. Appl. Supercond., vol. 15, pp. 1299–1302, 2005.

[7] M. Park, M. Choi, S. Hahn, G. Cha, and J. Lee, “Effect of the stack in HTS tapes exposed to External Magnetic Field,” IEEE Trans. Appl. Supercond., vol. 14, pp. 1106–1109, 2004.

[6] S. Hahn, S. H. Kim, and S. Hahn, “Trapped Field Analysis in an HTS Bulk with a Crack using 3D Finite Element Method,” IEEE Trans. Appl. Supercond., vol. 14, pp. 634–637, 2004.

[5] S. Hahn, S. Hahn, and C. Koh, “An Effective Hysteresis Loss Computation for HTS Bulk Material,” IEEE Trans. Appl. Supercond., vol. 13, pp. 2259– 2262, 2003.

[4] J. H. Kim, S. Hahn, C. H. Im, J. K. Kim, H. K. Jung, and S. Hahn, “Design of a 200-kJ HTS SMES System,” IEEE Trans. Appl. Supercond., vol. 12, pp. 774–777, 2002.

[3] S. Hahn, W. Kim, J. H. Kim, C. Koh, and S. Hahn, “Low Speed FES with Induction Motor and Generator,” IEEE Trans. Appl. Supercond., vol. 12, pp. 746–749, 2002.

[2] S. Hahn, S. Hahn, and S. Hah n, “Computation of Levitation Force in a Highly Magnetized HTS Bulk Magnet System,” Int. J. Appl. Electrom., vol. 16, no. 3-4, pp. 225–231, 2002.

[1] S. Hahn, J. H. Kim, C. Koh, and S. Hahn, “3-D Field Analysis of a Superconducting Bulk Magnet,” IEEE Trans. Appl. Supercond., vol. 11, no. 2, pp. 1996–1999, 2001.