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

Slutsky, S, Swank, C M, Biswas Sasidharan, A, Carr, R, Escribano, J, Filippone, B W, Griffith, W C, Mendenhall, M, Nouri, N, Osthelder, C, Pérez Galván, A, 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

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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
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
Research Centres and Groups: Experimental Particle Physics Research Group
Subjects: Q Science > QC Physics
Depositing User: Billy Wichaidit
Date Deposited: 22 Jun 2017 09:08
Last Modified: 22 Jun 2017 12:10
URI: http://sro.sussex.ac.uk/id/eprint/68328

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