Design, Fabrication and Testing of a D-Shaped High Temperature Superconducting Magnet
Abstract
High-temperature technical superconductors are potential candidates for compact and high-field tokamak magnets. The demand for higher fusion power can be met with an on-axis high magnetic field due to toroidal magnets. An R&D activity has been initiated at the Institute for Plasma Research, India, to develop a compact D-shaped superconducting magnet utilizing REBCO high-temperature superconducting tapes. Under this initiative, a toroidal configuration with a major radius of 0.42 m, consisting of eight D-shaped, four poloidal field, and a central solenoid high-temperature superconducting magnets producing an on-axis toroidal magnetic field of 0.23 T has been conceptualized. The fabrication feasibility of a D-shaped coil for this toroidal configuration also envisaged using stacked high-temperature superconducting cable. In this paper, we report the design of a compact D-shaped coil, the fabrication of a long length HTS cable, a winding pack, and its integration with a cryogenic casing and vacuum enclosure. The winding pack terminations, joints, its interfacing with the power supply, and performance testing are also reported in this paper.
Keywords
Cite
@article{arxiv.2601.10295,
title = {Design, Fabrication and Testing of a D-Shaped High Temperature Superconducting Magnet},
author = {Upendra Prasad and Mahesh Ghate and Piyush Raj and Deven Kanabar and Pankaj Varmora and Swati Roy and Arun Panchal and Dhaval Bhavsar and Anees Bano and Nitish Kumar and Bhadresh Parghi and Akhilesh Yadav and Mohd. Umer and Vijay Vasava and Raton Mandal and Rajkumar Ahirwar and Megha Thaker},
journal= {arXiv preprint arXiv:2601.10295},
year = {2026}
}