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Cryogenic magnetic coil and superconducting magnetic shield for neutron electric dipole moment searches

Slutsky, S. and Swank, C. M. and Biswas, A. and Carr, R. and Escribano, J. and Filippone, B. W. and Griffith, W. C. and Mendenhall, M. and Nouri, N. and Osthelder, C. and Pérez Galván, A. and Picker, R. and Plaster, B. (2017) Cryogenic magnetic coil and superconducting magnetic shield for neutron electric dipole moment searches. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 862 . pp. 36-48. ISSN 0168-9002. http://resolver.caltech.edu/CaltechAUTHORS:20170522-074051721

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Abstract

A magnetic coil operated at cryogenic temperatures is used to produce spatial, relative field gradients below 6 ppm/cm, stable for several hours. The apparatus is a prototype of the magnetic components for a neutron electric dipole moment (nEDM) search, which will take place at the Spallation Neutron Source (SNS) at Oak Ridge National Laboratory using ultra-cold neutrons (UCN). That search requires a uniform magnetic field to mitigate systematic effects and obtain long polarization lifetimes for neutron spin precession measurements. This paper details upgrades to a previously described apparatus [1], particularly the introduction of super-conducting magnetic shielding and the associated cryogenic apparatus. The magnetic gradients observed are sufficiently low for the nEDM search at SNS.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1016/j.nima.2017.05.005DOIArticle
http://www.sciencedirect.com/science/article/pii/S016890021730534XPublisherArticle
https://arxiv.org/abs/1701.03101arXivDiscussion Paper
Additional Information:© 2017 Elsevier B.V. Received 12 January 2017, Revised 6 April 2017, Accepted 5 May 2017, Available online 5 May 2017. The authors thank R. Golub, M. Hayden, and S. Lamoreaux for their many useful comments and suggestions. This work was supported by U.S. National Science Foundation grants 1205977 and 1506459.
Funders:
Funding AgencyGrant Number
NSFPHY-1205977
NSFPHY-1506459
Subject Keywords:Electric dipole moment; Magnetic fields; Magnetic gradients; Cryogenic; Superconducting; Geometric phase
Record Number:CaltechAUTHORS:20170522-074051721
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20170522-074051721
Official Citation:S. Slutsky, C.M. Swank, A. Biswas, R. Carr, J. Escribano, B.W. Filippone, W.C. Griffith, M. Mendenhall, N. Nouri, C. Osthelder, A. Pérez Galván, R. Picker, B. Plaster, Cryogenic magnetic coil and superconducting magnetic shield for neutron electric dipole moment searches, Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Volume 862, 1 August 2017, Pages 36-48, ISSN 0168-9002, https://doi.org/10.1016/j.nima.2017.05.005. (http://www.sciencedirect.com/science/article/pii/S016890021730534X)
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:77614
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:22 May 2017 16:00
Last Modified:22 May 2017 16:00

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