Affiliations: [a] Graduate School of Information Science and Technology, Hokkaido University, Kita-ku, Sapporo, Japan | [b] Plasma Fusion and Science Center, Massachusetts Institute of Technology, Cambridge, MA, USA
Correspondence:
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Corresponding author: So Noguchi, Graduate School of Information Science and Technology, Hokkaido University, Kita 14 Nishi 9, Kita-ku, Sapporo 062-0008, Japan. E-mail: [email protected]
Abstract: This paper presents the current and thermal phenomena of multi-stacked No-Insulation (NI) REBa2Cu3O7−x (REBCO, RE = Rare Earth) pancake coils during a local normal-state transition. An NI winding technique is expected to enhance the thermal stability of REBCO pancake coils, and it was verified in numerical simulations on a single pancake coil. However, a multi-stack of pancake coils are used to generate a high magnetic field in practical applications. When a normal-state transition occurs in one of multi-stacked pancake coils, it may deteriorate the stability of the other pancake coils. Therefore, we have developed a numerical simulation code to clarify the current and thermal behaviors of multi-stacked NI REBCO pancake coils using a partial element equivalent circuit model and a thermal finite element method.
Keywords: High temperature superconducting magnet, PEEC method, no-insulation REBCO pancake coil
