A Study of Magnetic Shielding Performance of a Fermilab International Linear Collider Superconducting RF Cavity Cryomodule

TL;DR

This paper demonstrates that achieving a magnetic shielding level of 5 milliGauss in a cryomodule for the Fermilab ILC is feasible within realistic ambient magnetic environments, supporting the design of superconducting RF cavities.

Contribution

It provides empirical measurements validating the feasibility of magnetic shielding at the 5 milliGauss level for cryomodules in practical environments.

Findings

Magnetic field levels of 5 mG are achievable in cryomodules.

Measurements support the practicality of shielding in real-world environments.

Results inform design considerations for superconducting RF cavities.

Abstract

This note presents measurements that support the conclusion that it is feasible to achieve magnetic field values at the level of 5 milliGauss for a cryomodule in a realistic and representative ambient magnetic field environment.