Design of A Conduction-cooled 4T Superconducting Racetrack for Multi-field Coupling Measurement System

TL;DR

This paper presents the design and analysis of a conduction-cooled 4 Tesla superconducting racetrack magnet for multi-field coupling measurements, emphasizing compactness, cost-efficiency, and detailed finite element analysis.

Contribution

It introduces a novel racetrack coil design with integrated cryostat and detailed FE analysis for a high-field superconducting magnet system.

Findings

Achieved a maximum central magnetic field of 4 T.

Designed a compact cryostat with a two-stage GM cryocooler.

Performed detailed FE analysis for stress and thermal distribution.

Abstract

A conduction-cooled superconducting magnet producing a transverse field of 4 Tesla has been designed for the new generation multi-field coupling measurement system, which was used to study the mechanical behavior of superconducting samples at cryogenic temperature and intense magnetic fields. Considering experimental costs and coordinating with system of strain measurements by contactless signals (nonlinear CCD optics system), the racetrack type for the coil winding was chosen in our design, and a compact cryostat with a two-stage GM cryocooler was designed and manufactured for the superconducting magnet. The magnet was composed of a pair of flat racetrack coils wound by NbTi/Cu superconducting composite wires, a copper and stainless steel combinational form and two Bi2Sr2CaCu2Oy superconducting current leads. All the coils were connected in series and can be powered with a single power supply. The maximum central magnetic field is 4 T. In order to support the high stress and uniform thermal distribution in the superconducting magnet, a detailed finite element (FE) analysis has been performed. The detailed design of superconducting racetrack magnet system is described in this paper.