Conceptual Design of A 20 T Dipole Based on Hybrid REBCO/Nb3Sn Cos-theta Coil*

TL;DR

This paper introduces a novel 20 Tesla hybrid dipole magnet design combining HTS REBCO and LTS Nb3Sn coils, utilizing stress management techniques to address high-field stress sensitivities.

Contribution

It presents a new conceptual design of a hybrid HTS/LTS dipole magnet with innovative stress management and coil configuration for high-field applications.

Findings

Magnetic analysis confirms the feasibility of the design.

Stress management effectively reduces coil strain.

Hybrid coil configuration achieves 20 T field target.

Abstract

This paper presents a design concept of an HTS/LTS hybrid dipole with 50 mm aperture and 20 T nominal field based on a cos-theta coil and a cold iron yoke. The HTS part of magnet coil uses REBCO Twisted Stacked Tape cable. The LTS part is graded and made of two Nb3Sn Rutherford cables. Due to high sensitivity of HTS/LTS coils to large stresses and strains at high fields, a Stress Management (SM) concept combined with the cos-theta coil geometry is used. The results of magnet magnetic analysis are presented and discussed.