IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY 33(5) 2023年8月 [査読有り]
We have studied a magnetic levitation system including an HTS bulk as magnetic shield. This system consists of a ferromagnetic rail, HTS bulks, and HTS coil. In this paper, the vertical attractive force was discussed in two types of the analytical...
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY 33(5) 2023年8月 [査読有り]
The authors previously proposed a quench protection method for a high-temperature superconducting (HTS) coil that uses Cu tape co-wound with HTS tape (Cu-CW method). In this method, when a quench occurs in the HTS coil, part of the current in the ...
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY 33(5) 2023年8月 [査読有り]
The JT-60SA central solenoid (CS) module is cooled to 4.5 K using liquid helium. This cool-down operation of the coil is planned to take about one month. During cool-down, the maximum temperature difference in the coil (dT(C-M)) must be kept below...
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY 33(5) 2023年8月 [査読有り]
For the large research Tokamak JT-60SA, evaluating the withstand voltage between conductors is one of the most critical factors for the coil design. The power supply feeding the coil injects a wide spectrum of frequency components. The transient r...
IEEE Transactions on Applied Superconductivity 32(6) 1-4 2022年9月 [査読有り]
The JT-60SA power supply of the central solenoid (CS) module contains multiple frequency components, and the transient response phenomenon and the resonance phenomenon cause the voltage non-uniformity in the CS. There is thus a possibility that a ...