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Development of Active Magnetic Shielding for the Neutron Electric Dipole Moment Experiment at TRIUMF

Active magnetic shielding has been proposed to provide low-frequency magnetic field stability in the neutron electric dipole moment (nEDM) experiment planned for TRIUMF. A prototype active magnetic shielding system was constructed and tested at the University of Winnipeg. The system is capable of providing RMS shielding factors > 1000 for magnetic field perturbation frequencies ≤ 20 mHz, and > 100 for frequencies ≤ 0.5 Hz, and can reduce magnetic
field variations on the order of tens of μT to the level of tens of nT. The achievable shielding factor was limited by the fi eld sampling rate limit of 400 Hz, and by the background fi eld noise floor of the laboratory. This represents good progress towards the eventual system for nEDM experiments, where low-frequency field drifts on the order of 100 nT require active shielding to the order of 1 nT.

Identiferoai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:MWU.1993/23223
Date14 January 2014
CreatorsLang, Michael
ContributorsBidinosti, Chris (Physics and Astronomy), Martin, Jeffery (Physics and Astronomy) Mammei, Juliette (Physics and Astronomy) Goltz, Doug (Chemistry)
Source SetsLibrary and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada
Detected LanguageEnglish

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