Measurements of sub-nT dynamic magnetic field shielding with soft iron and mu-metal for use in linear colliders

TL;DR

This paper evaluates the effectiveness of soft iron and mu-metal in shielding small-amplitude magnetic fields for linear collider applications, providing insights into their performance across different field strengths and frequencies.

Contribution

It presents new measurements of magnetic shielding performance of soft iron and mu-metal specifically for very small magnetic field amplitudes in linear collider environments.

Findings

Soft iron and mu-metal effectively shield small magnetic fields.

Shielding performance varies with amplitude and frequency.

Results inform optimal shielding material selection for linear colliders.

Abstract

There is an increasing need to shield beams and accelerator elements from stray magnetic fields. The application of magnetic shielding in linear colliders is discussed. The shielding performance of soft iron and mu-metal is measured for magnetic fields of varying amplitude and frequency. Special attention is given to characterise the shielding performance for very small-amplitude magnetic fields.