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Article
Open AccessAnomalous spin precession systematic effects in the search for a muon EDM using the frozen-spin technique
At the Paul Scherrer Institut (PSI), we are develo** a high-precision apparatus with the aim of searching for the muon electric dipole moment (EDM) with unprecedented sensitivity. The underpinning principle ...
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Article
Open AccessAchieving ultra-low and -uniform residual magnetic fields in a very large magnetically shielded room for fundamental physics experiments
High-precision searches for an electric dipole moment of the neutron (nEDM) require stable and uniform magnetic field environments. We present the recent achievements of degaussing and equilibrating the magnet...
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Article
Open AccessA large ‘Active Magnetic Shield’ for a high-precision experiment
We present a novel Active Magnetic Shield (AMS), designed and implemented for the n2EDM experiment at the Paul Scherrer Institute. The experiment will perform a high-sensitivity search for the electric dipole ...
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Article
Open AccessTime-of-flight spectroscopy of ultracold neutrons at the PSI UCN source
The ultracold neutron (UCN) source at the Paul Scherrer Institute (PSI) provides high intensities of storable neutrons for fundamental physics experiments. The neutron velocity spectrum parallel to the beamlin...
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Article
Open AccessMuonic atom spectroscopy with microgram target material
Muonic atom spectroscopy–the measurement of the x rays emitted during the formation process of a muonic atom–has a long standing history in probing the shape and size of nuclei. In fact, almost all stable elem...
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Article
Open AccessUltracold neutron storage and transport at the PSI UCN source
Efficient neutron transport is a key ingredient to the performance of ultracold neutron (UCN) sources, important to meeting the challenges placed by high precision fundamental physics experiments. At the Paul ...
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Article
Open AccessErratum to: Data blinding for the nEDM experiment at PSI
A Correction to this paper has been published: https://doi.org/10.1140/epja/s10050-021-00456-1
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Article
Open AccessThe design of the n2EDM experiment
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 sea...
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Article
Open AccessData blinding for the nEDM experiment at PSI
Psychological bias towards, or away from, prior measurements or theory predictions is an intrinsic threat to any data analysis. While various methods can be used to try to avoid such a bias, e.g. actively avoidin...
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Article
Neutron optics of the PSI ultracold-neutron source: characterization and simulation
The ultracold-neutron (UCN) source at the Paul Scherrer Institute serves mainly experiments in fundamental physics. High UCN intensities are the key for progress and success in such experiments. A detailed und...
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Article
Open AccessmuCool: a next step towards efficient muon beam compression
A novel device to compress the phase space of a muon beam by a factor of \(10^{10}\) ...
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Article
Symmetries and fundamental interactions: Precision experiments at low energies
Here is a short paper on precision physcis experiments at low energies. Such experiments use methods of nuclear, particle and atomic physics providing some of the most sensitive tests of our present best theor...
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Article
Solid deuterium surface degradation at ultracold neutron sources
Solid deuterium (sD \( _2\) ...
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Article
Ultracold neutron detection with 6Li-doped glass scintillators
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 100-200μm, fulfill...
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Article
A device for simultaneous spin analysis of ultracold neutrons
We report on the design and first tests of a device allowing for measurement of ultracold neutrons polarisation by means of the simultaneous analysis of the two spin components. The device was developed in the...
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Article
Measurement of a false electric dipole moment signal from 199Hg atoms exposed to an inhomogeneous magnetic field
We report on the measurement of a Larmor frequency shift proportional to the electric-field strength for 199Hg atoms contained in a volume permeated with aligned magnetic and electric fields. This shift arises fr...
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Article
Observation of positronium annihilation in the 2S state: towards a new measurement of the 1S-2S transition frequency
We report the first observation of the annihilation of positronium from the 2S state. Positronium (Ps) is excited with a two-photon transition from the 1S to the 2S state where its lifetime is increased by a f...
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Article
Experimental study of 199Hg spin anti-relaxation coatings
We report on a comparison of spin relaxation rates in a 199Hg magnetometer using different wall coatings. A compact mercury magnetometer was built for this purpose. Glass cells coated with fluorinated materials s...
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Article
An endoscopic detector for ultracold neutrons
A new versatile detector for ultracold neutrons (UCN) has been built and operated which combines multi-pixel photon counters and GS10 lithium-doped scintillators. Such detectors can be very small and can be us...
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Article
The Lamb-shift experiment in Muonic helium
We propose to measure several transition frequencies between the 2S and the 2P states (Lamb shift) in muonic helium ions (μ 4He + and μ 3He + ) by means of laser spectroscopy, in ...
