Speaker
Description
Motivated by our previous works, 26.4-T 35-mm and 18-T 74-mm ultra-high field no-insulation (NI) stand-alone magnets wound with 2G REBCO, we recently embarked on a new project to develop a 35-T NI REBCO standalone magnet. We published a design of a 35-T 40-mm winding bore magnet in 2017. Owing to the large average current density of the magnet (365 A/mm2), the magnet became highly compact; the winding outer diameter was 222 mm, while the overall winding height was 628 mm. It consisted of a stack of 52 double pancake (DP) coils and each 1500-turn DP coil requires ~600 m long REBCO tapes. As a part of the project, we fabricated and tested a single DP coil wound with a kilometer long REBCO tape to investigate manufacturing details. In this paper, we present design and construction details of the test coil, and test results in a bath of liquid nitrogen at 77 K and in conduction-cooling at 20 K.
Keywords: NI winding, REBCO tape, superconducting magnet, ultra-high field
Category: G09 - Small Test and Model Coils
Acknowledgement
This work was supported by the Korea Basic Science Institute (KBSI) grant D39611. It was also partly supported by the National Research Foundation of Korea as a part of Mid-Career Research Program (No. 2018R1A2B3009249).
