Dependence of Maximum Trappable Field on Superconducting Nb3Sn Cylinder Wall Thickness

TL;DR

This study demonstrates the highest magnetic field trapping in helically wound Nb3Sn superconducting cylinders and investigates how wall thickness influences the maximum trappable field.

Contribution

It is the first to report trapping in helically wound taped cylinders and to experimentally determine the relationship between wall thickness and maximum trappable field.

Findings

Achieved uniform magnetic field trapping up to 22.4 kOe.

First experimental determination of maximum trappable field versus wall thickness.

Demonstrated high fidelity of trapped fields to original fields.

Abstract

Uniform dipole magnetic fields from 1.9 to 22.4 kOe were permanently trapped, with high fidelity to the original field, transversely to the axes of hollow Nb3Sn superconducting cylinders. These cylinders were constructed by helically wrapping multiple layers of superconducting ribbon around a mandrel. This is the highest field yet trapped, the first time trapping has been reported in such helically wound taped cylinders, and the first time the maximum trappable field has been experimentally determined as a function of cylinder wall thickness.