Cryogenic magnetic coil and superconducting magnetic shield for neutron electric dipole moment searches
| Autor: | W. C. Griffith, B. W. Filippone, J. Escribano, Brad Plaster, Nima Nouri, A. Pérez Galván, R. Picker, S. Slutsky, A. Biswas, C. Swank, Marcus H. Mendenhall, R. Carr, C. Osthelder |
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| Rok vydání: | 2017 |
| Předmět: |
Physics
Nuclear and High Energy Physics Physics - Instrumentation and Detectors Magnetic energy Neutron electric dipole moment 010308 nuclear & particles physics Physics::Instrumentation and Detectors FOS: Physical sciences Instrumentation and Detectors (physics.ins-det) 7. Clean energy 01 natural sciences Magnetic field Nuclear physics Electric dipole moment Search coil Electromagnetic coil 0103 physical sciences Physics::Accelerator Physics Neutron Nuclear Experiment (nucl-ex) 010306 general physics Nuclear Experiment Instrumentation QC Spallation Neutron Source |
| ISSN: | 0168-9002 |
| DOI: | 10.48550/arxiv.1701.03101 |
| Popis: | 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, 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. Comment: 26 pages, 19 figures; significant updates in response to referee comments. Reworked Section 3.2 for clarity. Added several Figures for clarity, and indicated orientation better in many Figures. Fixed typographical problems. Updated an author's attribution to reflect current place of work. Updated conclusions to better indicate future steps needed |
| Databáze: | OpenAIRE |
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