Search results for "Atomic and molecular structure and dynamics"

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Johnson-Nyquist Noise Effects in Neutron Electric-Dipole-Moment Experiments

2021

Magnetic Johnson-Nyquist noise (JNN) originating from metal electrodes, used to create a static electric field in neutron electric-dipole-moment (nEDM) experiments, may limit the sensitivity of measurements. We present here the first dedicated study on JNN applied to a large-scale long-measurement-time experiment with the implementation of a co-magnetometry. In this study, we derive surface- and volume-averaged root-mean-square normal noise amplitudes at a certain frequency bandwidth for a cylindrical geometry. In addition, we model the source of noise as a finite number of current dipoles and demonstrate a method to simulate temporal and three-dimensional spatial dependencies of JNN. The c…

noiseNeutron electric dipole momentMagnetometerAtomic Physics (physics.atom-ph)FOS: Physical sciencesNeutron Physics[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]01 natural sciencesNoise (electronics)010305 fluids & plasmaslaw.inventionPhysics - Atomic PhysicslawElectric field0103 physical sciencesNeutronNuclear Experiment (nucl-ex)010306 general physicsNuclear ExperimentPhysicshigh-precision experimentsprecision measurementJohnson–Nyquist noiseAtomic and molecular structure and dynamics[PHYS.PHYS.PHYS-GEN-PH]Physics [physics]/Physics [physics]/General Physics [physics.gen-ph]Computational physicsDipoleNuclear Spin ResonanceAmplitudeElectromagnetic Field Calculations

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PEPhysical Sciences and Engineering
- PE2Fundamental Constituents of Matter
  - PE2_1Theory of fundamental interactions
  - PE2_2 Phenomenology of fundamental interactions
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LSLife Sciences
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- LS2Integrative Biology: from Genes and Genomes to Systems
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  - LS4_1Organ and tissue physiology and pathophysiology
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SHSocial Sciences and Humanities
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