D. Rebreyend
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View article: Determination of diffusion coefficients of mercury atoms in various gases from longitudinal spin relaxation in magnetic gradients
Determination of diffusion coefficients of mercury atoms in various gases from longitudinal spin relaxation in magnetic gradients Open
We present a method to measure the binary diffusion coefficient of mercury atoms in a gas at room temperature and low pressure. It is based on the measurement of the longitudinal spin relaxation of optically pumped mercury-199 atoms in a m…
View article: Publisher’s Note: “The very large n2EDM magnetically shielded room with an exceptional performance for fundamental physics measurements” [Rev. Sci. Instrum. 93, 095105 (2022)]
Publisher’s Note: “The very large n2EDM magnetically shielded room with an exceptional performance for fundamental physics measurements” [Rev. Sci. Instrum. 93, 095105 (2022)] Open
status: Published
View article: Mapping of the magnetic field to correct systematic effects in a neutron electric dipole moment experiment
Mapping of the magnetic field to correct systematic effects in a neutron electric dipole moment experiment Open
Experiments dedicated to the measurement of the electric dipole moment of the\nneutron require outstanding control of the magnetic field uniformity. The\nneutron electric dipole moment (nEDM) experiment at the Paul Scherrer Institute\nuses…
View article: The very large n2EDM magnetically shielded room with an exceptional performance for fundamental physics measurements
The very large n2EDM magnetically shielded room with an exceptional performance for fundamental physics measurements Open
We present the magnetically shielded room (MSR) for the n2EDM experiment at the Paul Scherrer Institute, which features an interior cubic volume with each side of length 2.92 m, thus providing an accessible space of 25 m3. The MSR has 87 o…
View article: Manipulation of gravitational quantum states of a bouncing neutron with the GRANIT spectrometer
Manipulation of gravitational quantum states of a bouncing neutron with the GRANIT spectrometer Open
The bouncing neutron is one of the rare system where gravity can be studied in a quantum framework. To this end it is crucial to be able to select some specific gravitational quantum state (GQS). The GRANIT apparatus is the first physics e…
View article: The design of the n2EDM experiment: nEDM Collaboration
The design of the n2EDM experiment: nEDM Collaboration Open
We present the design of a next-generation experiment, n2EDM, currently under construction at the ultracold neutron source at the Paul Scherrer Institute (PSI) with the aim of carrying out a high-precision search for an electric dipole mom…
View article: Johnson-Nyquist noise effects in neutron electric-dipole-moment experiments
Johnson-Nyquist noise effects in neutron electric-dipole-moment experiments Open
Magnetic Johnson-Nyquist noise (JNN) originating from metal electrodes, used\nto create a static electric field in neutron electric-dipole-moment (nEDM)\nexperiments, may limit the sensitivity of measurements. We present here the\nfirst de…
View article: Mapping of the magnetic field to correct systematic effects in a neutron electric dipole moment experiment
Mapping of the magnetic field to correct systematic effects in a neutron electric dipole moment experiment Open
Experiments dedicated to the measurement of the electric dipole moment of the neutron require outstanding control of the magnetic field uniformity. The neutron electric dipole moment (nEDM) experiment at the Paul Scherrer Institute uses a …
View article: Optically pumped Cs magnetometers enabling a high-sensitivity search for the neutron electric dipole moment
Optically pumped Cs magnetometers enabling a high-sensitivity search for the neutron electric dipole moment Open
An array of 16 laser-pumped scalar Cs magnetometers was part of the neutron electric dipole moment (nEDM) experiment taking data at the Paul Scherrer Institute in 2015 and 2016. It was deployed to measure the gradients of the experiment's …
View article: Measurement of the Permanent Electric Dipole Moment of the Neutron
Measurement of the Permanent Electric Dipole Moment of the Neutron Open
We present the result of an experiment to measure the electric dipole moment (EDM) of the neutron at the Paul Scherrer Institute using Ramsey's method of separated oscillating magnetic fields with ultracold neutrons. Our measurement stands…
View article: Magnetic-field uniformity in neutron electric-dipole-moment experiments
Magnetic-field uniformity in neutron electric-dipole-moment experiments Open
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View article: Design and test of a compact and high-resolution time-of-flight measurement device for cold neutron beams
Design and test of a compact and high-resolution time-of-flight measurement device for cold neutron beams Open
A time-of-flight device was developed to characterize wavelength distribution\nand uniformity of a cold neutron beam. This device is very compact -- the\ndistance of flight is $60$ cm -- but achieves very high resolution -- the\nintrinsic …
View article: nEDM experiment at PSI: Data-taking strategy and sensitivity of the dataset
nEDM experiment at PSI: Data-taking strategy and sensitivity of the dataset Open
We report on the strategy used to optimize the sensitivity of our search for a neutron electric dipole moment at the Paul Scherrer Institute. Measurements were made upon ultracold neutrons stored within a single chamber at the heart of our…
View article: The n2EDM experiment at the Paul Scherrer Institute
The n2EDM experiment at the Paul Scherrer Institute Open
We present the new spectrometer for the neutron electric dipole moment (nEDM) search at the Paul Scherrer Institute (PSI), called n2EDM. The setup is at room temperature in vacuum using ultracold neutrons. n2EDM features a large UCN double…
View article: Search for axionlike dark matter through nuclear spin precession in electric and magnetic fields
Search for axionlike dark matter through nuclear spin precession in electric and magnetic fields Open
We report on a search for ultralow-mass axionlike dark matter by analyzing the ratio of the spin-precession frequencies of stored ultracold neutrons and 199Hg atoms for an axion-induced oscillating electric dipole moment of the neutron and…
View article: Ultracold neutron detection with 6Li-doped glass scintillators, NANOSC: a fast ultracold neutron detector for the nEDM experiment at the Paul Scherrer Institute
Ultracold neutron detection with 6Li-doped glass scintillators, NANOSC: a fast ultracold neutron detector for the nEDM experiment at the Paul Scherrer Institute Open
This paper summarizes the results from measurements aiming to characterize ultracold neutron detection with 6Li-doped glass scintillators. Single GS10 or GS20 scintillators, with a thickness of 100-200 micrometer, fulfill the ultracold neu…
View article: Revised experimental upper limit on the electric dipole moment of the neutron
Revised experimental upper limit on the electric dipole moment of the neutron Open
We present for the first time a detailed and comprehensive analysis of the\nexperimental results that set the current world sensitivity limit on the\nmagnitude of the electric dipole moment (EDM) of the neutron. We have extended\nand enhan…
View article: Observation of Gravitationally Induced Vertical Striation of Polarized Ultracold Neutrons by Spin-Echo Spectroscopy
Observation of Gravitationally Induced Vertical Striation of Polarized Ultracold Neutrons by Spin-Echo Spectroscopy Open
We describe a spin-echo method for ultracold neutrons (UCNs) confined in a precession chamber and exposed to a |B0|=1 μT magnetic field. We have demonstrated that the analysis of UCN spin-echo resonance signals in combination with knowledg…
View article: Gravitational depolarization of ultracold neutrons: Comparison with data
Gravitational depolarization of ultracold neutrons: Comparison with data Open
We compare the expected effects of so-called gravitationally enhanced depolarization of ultracold neutrons to measurements carried out in a spin-precession chamber exposed to a variety of vertical magnetic-field gradients. In particular, w…
View article: Measurement of the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi mathvariant="normal">Σ</mml:mi></mml:math>beam asymmetry for the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>ω</mml:mi></mml:math>photoproduction off the proton and the neutron at the GRAAL experiment
Measurement of thebeam asymmetry for thephotoproduction off the proton and the neutron at the GRAAL experiment Open
We report on new measurements of the beam asymmetry for \\omega\\\nphoto-production on proton and neutron in Hydrogen and Deuterium targets from\nthe GRAAL collaboration. The beam asymmetry values are extracted from the\nreaction threshold…