Minimising the Residual Field and Field Gradient in a Magnetically Shielded Room for an nEDM experiment at Los Alamos National Laboratory

Faculty Sponsor

Shirvel Stanislaus


Arts and Sciences



ORCID Identifier(s)


Document Type

Poster Presentation

Symposium Date

Summer 7-31-2017


The LANL neutron Electric Dipole Moment (nEDM) experiment is an effort to set a sensitivity limit of 3.2 × 10-27 e·cm on the electric dipole moment of the neutron, an order of magnitude smaller than the current upper limit. The experiment is enclosed in a two layer Mu-metal magnetically shielded room (MSR) to eliminate magnetic noise from the environment. The MSR is degaussed to sufficiently reduce its residual magnetic field and field gradient. The MSR is designed for residual fields as low as 30 nT while the experiment requires a field gradient of 1 nT/m or smaller. Here we report on the degaussing procedure and the resulting improvement in the shielding prowess of the MSR.

Biographical Information about Author(s)

Physics and Mathematics major at Valparaiso University. Current work resulted from a summer spent at Los Alamos National Laboratory.

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