Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5492982 | Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment | 2017 | 9 Pages |
Abstract
Future experiments seeking to measure the neutron electric dipole moment (nEDM) require stable and homogeneous magnetic fields. Normally these experiments use a coil internal to a passively magnetically shielded volume to generate the magnetic field. The stability of the magnetic field generated by the coil within the magnetically shielded volume may be influenced by a number of factors. The factor studied here is the dependence of the internally generated field on the magnetic permeability μ of the shield material. We provide measurements of the temperature-dependence of the permeability of the material used in a set of prototype magnetic shields, using experimental parameters nearer to those of nEDM experiments than previously reported in the literature. Our measurements imply a range of 1μdμdT from 0-2.7%/K. Assuming typical nEDM experiment coil and shield parameters gives μB0dB0dμ=0.01, resulting in a temperature dependence of the magnetic field in a typical nEDM experiment of dB0dT=0â270 pT/K for B0=1μT. The results are useful for estimating the necessary level of temperature control in nEDM experiments.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Instrumentation
Authors
T. Andalib, J.W. Martin, C.P. Bidinosti, R.R. Mammei, B. Jamieson, M. Lang, T. Kikawa,