Uni-layer magnets: a new concept for LTS and HTS based superconducting magnets

TL;DR

The paper introduces the uni-layer magnet, a novel superconducting magnet design that uses an asymmetric current distribution within a single layer to generate perpendicular magnetic fields, offering advantages for high-field applications with strain-sensitive superconductors.

Contribution

It presents the uni-layer magnet concept, a new geometrical configuration that simplifies design and improves conductor utilization compared to traditional superconducting magnet concepts.

Findings

Allows continuous unit length without layer jumps

Increases minimum bending radius of conductors

Advantages for high-temperature superconductors in high-field magnets

Abstract

A novel geometrical configuration to form a magnetic field perpendicular to an aperture, created by an asymmetric current distribution, within a single layer, and using a continuous ideal current line, named the uni-layer magnet, is here presented. The idea is compared to existing concepts in superconducting magnets, namely, the $\cos{\theta}$ sector magnet, stress managed $\cos{\theta}$ and canted $\cos{\theta}$. The uni-layer magnet allows for a design with a continuous unit length (no layer jump), and an increased minimum bending radius of the conductor in relation to traditional $\cos{\theta}$ and canted $\cos{\theta}$ designs. The specific characteristics of the uni-layer design are especially advantageous for strain-sensitive and prone to winding degradation high-temperature superconductors, in very high field accelerator magnet applications, in which, high efficiency in the use of conductor, and a small aperture are required. The advantages with regard to the design and fabrication of uni-layer magnets in relation to other concepts are also discussed.