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

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

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

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.

Original languageEnglish
Pages (from-to)36-48
Number of pages13
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume862
DOIs
StatePublished - Aug 1 2017

Bibliographical note

Publisher Copyright:
© 2017 Elsevier B.V.

Keywords

  • Cryogenic
  • Electric dipole moment
  • Geometric phase
  • Magnetic fields
  • Magnetic gradients
  • Superconducting

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation

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