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145 results on '"Koch, H. -C."'

1. Mapping of the magnetic field to correct systematic effects in a neutron electric dipole moment experiment

Author

Abel, C., Ayres, N. J., Ban, G., Bison, G., Bodek, K., Bondar, V., Chanel, E., Chiu, P. -J., Clément, B., Crawford, C. B., Daum, M., Emmenegger, S., Ferraris-Bouchez, L., Fertl, M., Flaux, P., Fratangelo, A., Griffith, W. C., Grujić, Z. D., Harris, P. G., Hayen, L., Hild, N., Kasprzak, M., Kirch, K., Knowles, P., Koch, H. -C., Koss, P. A., Kozela, A., Krempel, J., Lauss, B., Lefort, T., Lemière, Y., Mohanmurthy, P., Naviliat-Cuncic, O., Pais, D., Piegsa, F. M., Pignol, G., Prashanth, P. N., Quéméner, G., Rawlik, M., Ries, D., Rebreyend, D., Roccia, S., Rozpedzik, D., Schmidt-Wellenburg, P., Schnabel, A., Severijns, N., Thorne, J. A., Virot, R., Weis, A., Wursten, E., Wyszynski, G., Zejma, J., and Zsigmond, G.

Subjects
Physics - Instrumentation and Detectors, High Energy Physics - Experiment, Nuclear Experiment
Abstract

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 199Hg co-magnetometer to precisely monitor magnetic field variations. This co-magnetometer, in the presence of field non-uniformity, is responsible for the largest systematic effect of this measurement. To evaluate and correct that effect, offline measurements of the field non-uniformity were performed during mapping campaigns in 2013, 2014 and 2017. We present the results of these campaigns, and the improvement the correction of this effect brings to the neutron electric dipole moment measurement.

Published
2021
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2. A search for neutron to mirror-neutron oscillations

Author

Abel, C., Ayres, N. J., Ban, G., Bison, G., Bodek, K., Bondar, V., Chanel, E., Chiu, P. -J., Crawford, C., Daum, M., Dinani, R. T., Emmenegger, S., Flaux, P., Ferraris-Bouchez, L., Griffith, W. C., Grujic, Z. D., Hild, N., Kirch, K., Koch, H. -C., Koss, P. A., Kozela, A., Krempel, J., Lauss, B., Lefort, T., Leredde, A., Mohanmurthy, P., Naviliat-Cuncic, O., Pais, D., Piegsa, F. M., Pignol, G., Rawlik, M., Rebreyend, D., Rienaecker, I., Ries, D., Roccia, S., Rozpedzik, D., Schmidt-Wellenburg, P., Severijns, N., Thorne, J., Weis, A., Wursten, E., Zejma, J., and Zsigmond, G.

Subjects
High Energy Physics - Phenomenology, Nuclear Experiment, Quantum Physics
Abstract

It has been proposed that there could be a mirror copy of the standard model particles, restoring the parity symmetry in the weak interaction on the global level. Oscillations between a neutral standard model particle, such as the neutron, and its mirror counterpart could potentially answer various standing issues in physics today. Astrophysical studies and terrestrial experiments led by ultracold neutron storage measurements have investigated neutron to mirror-neutron oscillations and imposed constraints on the theoretical parameters. Recently, further analysis of these ultracold neutron storage experiments has yielded statistically significant anomalous signals that may be interpreted as neutron to mirror-neutron oscillations, assuming nonzero mirror magnetic fields. The neutron electric dipole moment collaboration performed a dedicated search at the Paul Scherrer Institute and found no evidence of neutron to mirror-neutron oscillations. Thereby, the following new lower limits on the oscillation time were obtained: $\tau_{nn'} > 352~$s at $B'=0$ (95% C.L.), $\tau_{nn'} > 6~\text{s}$ for all $0.4~\mu\text{T}9~\text{s}$ for all $5.0~\mu\text{T}

Published
2020
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3. Measurement of the permanent electric dipole moment of the neutron

Author

Abel, C., Afach, S., Ayres, N. J., Baker, C. A., Ban, G., Bison, G., Bodek, K., Bondar, V., Burghoff, M., Chanel, E., Chowdhuri, Z., Chiu, P. -J., Clement, B., Crawford, C. B., Daum, M., Emmenegger, S., Ferraris-Bouchez, L., Fertl, M., Flaux, P., Franke, B., Fratangelo, A., Geltenbort, P., Green, K., Griffith, W. C., van der Grinten, M., Grujić, Z. D., Harris, P. G., Hayen, L., Heil, W., Henneck, R., Hélaine, V., Hild, N., Hodge, Z., Horras, M., Iaydjiev, P., Ivanov, S. N., Kasprzak, M., Kermaidic, Y., Kirch, K., Knecht, A., Knowles, P., Koch, H. -C., Koss, P. A., Komposch, S., Kozela, A., Kraft, A., Krempel, J., Kuźniak, M., Lauss, B., Lefort, T., Lemière, Y., Leredde, A., Mohanmurthy, P., Mtchedlishvili, A., Musgrave, M., Naviliat-Cuncic, O., Pais, D., Piegsa, F. M., Pierre, E., Pignol, G., Plonka-Spehr, C., Prashanth, P. N., Quéméner, G., Rawlik, M., Rebreyend, D., Rienäcker, I., Ries, D., Roccia, S., Rogel, G., Rozpedzik, D., Schnabel, A., Schmidt-Wellenburg, P., Severijns, N., Shiers, D., Dinani, R. Tavakoli, Thorne, J. A., Virot, R., Voigt, J., Weis, A., Wursten, E., Wyszynski, G., Zejma, J., Zenner, J., and Zsigmond, G.

Subjects
High Energy Physics - Experiment, Nuclear Experiment, Physics - Instrumentation and Detectors
Abstract

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 (UCN). Our measurement stands in the long history of EDM experiments probing physics violating time reversal invariance. The salient features of this experiment were the use of a Hg-199 co-magnetometer and an array of optically pumped cesium vapor magnetometers to cancel and correct for magnetic field changes. The statistical analysis was performed on blinded datasets by two separate groups while the estimation of systematic effects profited from an unprecedented knowledge of the magnetic field. The measured value of the neutron EDM is $d_{\rm n} = (0.0\pm1.1_{\rm stat}\pm0.2_{\rm sys})\times10^{-26}e\,{\rm cm}$., Comment: 5 pages, 4 figures, submitted to PRL on 18.12.2019

Published
2020
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4. Optically Pumped Cs Magnetometers Enabling a High-Sensitivity Search for the Neutron Electric Dipole Moment

Author

Abel, C., Afach, S., Ayres, N. J., Ban, G., Bison, G., Bodek, K., Bondar, V., Chanel, E., Chiu, P. -J., Crawford, C. B., Chowdhuri, Z., Daum, M., Emmenegger, S., Ferraris-Bouchez, L., Fertl, M., Franke, B., Griffith, W. C., Grujić, Z. D., Hayen, L., Hélaine, V., Hild, N., Kasprzak, M., Kermaidic, Y., Kirch, K., Knowles, P., Koch, H. -C., Komposch, S., Koss, P. A., Kozela, A., Krempel, J., Lauss, B., Lefort, T., Lemière, Y., Leredde, A., Mtchedlishvili, A., Mohanmurthy, P., Musgrave, M., Naviliat-Cuncic, O., Pais, D., Pazgalev, A., Piegsa, F. M., Pierre, E., Pignol, G., Prashanth, P. N., Quéméner, G., Rawlik, M., Rebreyend, D., Ries, D., Roccia, S., Rozpedzik, D., Schmidt-Wellenburg, P., Schnabel, A., Severijns, N., Dinani, R. Tavakoli, Thorne, J., Weis, A., Wursten, E., Wyszynski, G., Zejma, J., and Zsigmond, G.

Subjects
Physics - Atomic Physics, High Energy Physics - Experiment, Nuclear Experiment
Abstract

An array of sixteen 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 magnetic field and to monitor their temporal evolution. The originality of the array lies in its compact design, in which a single near-infrared diode laser drives all magnetometers that are located in a high-vacuum chamber, with a selection of the sensors mounted on a high-voltage electrode. We describe details of the Cs sensors' construction and modes of operation, emphasizing the accuracy and sensitivity of the magnetic field readout. We present two applications of the magnetometer array directly beneficial to the nEDM experiment: (i) the implementation of a strategy to correct for the drift of the vertical magnetic field gradient and (ii) a procedure to homogenize the magnetic field. The first reduces the uncertainty of the new nEDM result. The second enables transverse neutron spin relaxation times exceeding 1500 s, improving the statistical sensitivity of the nEDM experiment by about 35% and effectively increasing the rate of nEDM data taking by a factor of 1.8.

Published
2019
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5. Magnetic field uniformity in neutron electric dipole moment experiments

Author

Abel, C., Ayres, N., Baker, T., Ban, G., Bison, G., Bodek, K., Bondar, V., Crawford, C., Chiu, P. -J., Chanel, E., Chowdhuri, Z., Daum, M., Dechenaux, B., Emmenegger, S., Ferraris-Bouchez, L., Flaux, P., Geltenbort, P., Green, K., Griffith, W. C., van der Grinten, M., Harris, P. G., Henneck, R., Hild, N., Iaydjiev, P., Ivanov, S. N., Kasprzak, M., Kermaidic, Y., Kirch, K., Koch, H. -C., Komposch, S., Koss, P. A., Kozela, A., Krempel, J., Lauss, B., Lefort, T., Lemiere, Y., Leredde, A., Mohanmurthy, P., Pais, D., Piegsa, F. M., Pignol, G., Quéméner, G., Rawlik, M., Rebreyend, D., Ries, D., Roccia, S., Rozpedzik, D., Schmidt-Wellenburg, P., Schnabel, A., Severijns, N., Virot, R., Weis, A., Wursten, E., Wyszynski, G., Zejma, J., and Zsigmond, G.

Subjects
Physics - Instrumentation and Detectors, High Energy Physics - Experiment
Abstract

Magnetic field uniformity is of the utmost importance in experiments to measure the electric dipole moment of the neutron. A general parametrization of the magnetic field in terms of harmonic polynomial modes is proposed, going beyond the linear-gradients approximation. We review the main undesirable effects of non-uniformities: depolarization of ultracold neutrons, and Larmor frequency shifts of neutrons and mercury atoms. The theoretical predictions for these effects were verified by dedicated measurements with the single-chamber nEDM apparatus installed at the Paul Scherrer Institute.

Published
2018
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6. Demonstration of sensitivity increase in mercury free-spin-precession magnetometers due to laser-based readout for neutron electric dipole moment searches

Author

Ban, G., Bison, G., Bodek, K., Daum, M., Fertl, M., Franke, B., Grujić, Z. D., Heil, W., Horras, M., Kasprzak, M., Kermaidic, Y., Kirch, K., Koch, H. -C., Komposch, S., Kozel, A., Krempel, J., Lauss, B., Lefort, T., Mtchedlishvili, A., Pignol, G., Piegsa, F. M., Prashanth, P., Quéméner, G., Rawlik, M., Rebreyend, D., Ries, D., Roccia, S., Rozpedzik, D., Schmidt-Wellenburg, P., Severijns, N., Weis, A., Wyszynski, G., Zejma, J., and Zsigmond, G.

Subjects
Physics - Instrumentation and Detectors, High Energy Physics - Experiment, Nuclear Experiment, Physics - Atomic Physics
Abstract

We report on a laser based $^{199}$Hg co-magnetometer deployed in an experiment searching for a permanent electric dipole moment of the neutron. We demonstrate a more than five times increased signal to-noise-ratio in a direct comparison measurement with its $^{204}$Hg discharge bulb-based predecessor. An improved data model for the extraction of important system parameters such as the degrees of absorption and polarization is derived. Laser- and lamp-based data-sets can be consistently described by the improved model which permits to compare measurements using the two different light sources and to explain the increase in magnetometer performance. The laser-based magnetometer satisfies the magnetic field sensitivity requirements for the next generation nEDM experiments.

Published
2018
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7. Search for axion-like dark matter through nuclear spin precession in electric and magnetic fields

Author

Abel, C., Ayres, N. J., Ban, G., Bison, G., Bodek, K., Bondar, V., Daum, M., Fairbairn, M., Flambaum, V. V., Geltenbort, P., Green, K., Griffith, W. C., van der Grinten, M., Grujić, Z. D., Harris, P. G., Hild, N., Iaydjiev, P., Ivanov, S. N., Kasprzak, M., Kermaidic, Y., Kirch, K., Koch, H. -C., Komposch, S., Koss, P. A., Kozela, A., Krempel, J., Lauss, B., Lefort, T., Lemière, Y., Marsh, D. J. E., Mohanmurthy, P., Mtchedlishvili, A., Musgrave, M., Piegsa, F. M., Pignol, G., Rawlik, M., Rebreyend, D., Ries, D., Roccia, S., Rozpędzik, D., Schmidt-Wellenburg, P., Severijns, N., Shiers, D., Stadnik, Y. V., Weis, A., Wursten, E., Zejma, J., and Zsigmond, G.

Subjects
High Energy Physics - Phenomenology, Astrophysics - Cosmology and Nongalactic Astrophysics, Nuclear Experiment, Nuclear Theory, Physics - Atomic Physics
Abstract

We report on a search for ultra-low-mass axion-like dark matter by analysing the ratio of the spin-precession frequencies of stored ultracold neutrons and $^{199}$Hg atoms for an axion-induced oscillating electric dipole moment of the neutron and an axion-wind spin-precession effect. No signal consistent with dark matter is observed for the axion mass range $10^{-24}~\textrm{eV} \le m_a \le 10^{-17}~\textrm{eV}$. Our null result sets the first laboratory constraints on the coupling of axion dark matter to gluons, which improve on astrophysical limits by up to 3 orders of magnitude, and also improves on previous laboratory constraints on the axion coupling to nucleons by up to a factor of 40.

Published
2017
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8. A Revised Experimental Upper Limit on the Electric Dipole Moment of the Neutron

Author

Pendlebury, J. M., Afach, S., Ayres, N. J., Baker, C. A., Ban, G., Bison, G., Bodek, K., Burghoff, M., Geltenbort, P., Green, K., Griffith, W. C., van der Grinten, M., Grujic, Z. D., Harris, P. G., Helaine, V., Iaydjiev, P., Ivanov, S. N., Kasprzak, M., Kermaidic, Y., Kirch, K., Koch, H. -C., Komposch, S., Kozela, A., Krempel, J., Lauss, B., Lefort, T., Lemiere, Y., May, D. J. R., Musgrave, M., Naviliat-Cuncic, O., Piegsa, F. M., Pignol, G., Prashanth, P. N., Quemener, G., Rawlik, M., Rebreyend, D., Richardson, J. D., Ries, D., Roccia, S., Rozpedzik, D., Schnabel, A., Schmidt-Wellenburg, P., Severijns, N., Shiers, D., Thorne, J. A., Weis, A., Winston, O. J., Wursten, E., Zejma, J., and Zsigmond, G.

Subjects
High Energy Physics - Experiment, Physics - Instrumentation and Detectors
Abstract

We present for the first time a detailed and comprehensive analysis of the experimental results that set the current world sensitivity limit on the magnitude of the electric dipole moment (EDM) of the neutron. We have extended and enhanced our earlier analysis to include recent developments in the understanding of the effects of gravity in depolarizing ultracold neutrons (UCN); an improved calculation of the spectrum of the neutrons; and conservative estimates of other possible systematic errors, which are also shown to be consistent with more recent measurements undertaken with the apparatus. We obtain a net result of $d_\mathrm{n} = -0.21 \pm 1.82 \times10^{-26}$ $e$cm, which may be interpreted as a slightly revised upper limit on the magnitude of the EDM of $3.0 \times10^{-26}$ $e$cm (90% CL) or $ 3.6 \times10^{-26}$ $e$cm (95% CL). This paper is dedicated by the remaining authors to the memory of Prof. J. Michael Pendlebury., Comment: 23 pages, 19 figures. Authorship list changed to put J.M. Pendlebury first. Other very minor edits

Published
2015
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9. A highly stable atomic vector magnetometer based on free spin precession

Author

Afach, S., Ban, G., Bison, G., Bodek, K., Chowdhuri, Z., Grujic, Z. D., Hayen, L., Helaine, V., Kasprzak, M., Kirch, K., Knowles, P., Koch, H. -C., Komposch, S., Kozela, A., Krempel, J., Lauss, B., Lefort, T., Lemiere, Y., Mtchedlishvili, A., Naviliat-Cuncic, O., Piegsa, F. M., Prashanth, P. N., Quemener, G., Rawlik, M., Ries, D., Roccia, S., Rozpedzik, D., Schmidt-Wellenburg, P., Severjins, N., Weis, A., Wursten, E., Wyszynski, G., Zejma, J., and Zsigmond, G.

Subjects
Physics - Atomic Physics
Abstract

We present a magnetometer based on optically pumped Cs atoms that measures the magnitude and direction of a 1 $\mu$T magnetic field. Multiple circularly polarized laser beams were used to probe the free spin precession of the Cs atoms. The design was optimized for long-time stability and achieves a scalar resolution better than 300 fT for integration times ranging from 80 ms to 1000 s. The best scalar resolution of less than 80 fT was reached with integration times of 1.6 to 6 s. We were able to measure the magnetic field direction with a resolution better than 10 $\mu$rad for integration times from 10 s up to 2000 s.

Published
2015
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10. Gravitational Depolarization of Ultracold Neutrons: Comparison with Data

Author

Afach, S., Ayres, N. J., Baker, C. A., Ban, G., Bison, G., Bodek, K., Fertl, M., Franke, B., Geltenbort, P., Green, K., Griffith, W. C., van der Grinten, M., Grujic, Z. D., Harris, P. G., Heil, W., Helaine, V., Iaydjiev, P., Ivanov, S. N., Kasprzak, M., Kermaidic, Y., Kirch, K., Koch, H. -C., Komposch, S., Kozela, A., Krempel, J., Lauss, B., Lefort, T., Lemiere, Y., Musgrave, M., Naviliat-Cunic, O., Pendlebury, J. M., Piegsa, F. M., Pignol, G., Plonka-Spehr, C., Prashanth, P. N., Quemener, G., Rawlik, M., Rebreyend, D., Ries, D., Roccia, S., Rozpedzik, D., Schmidt-Wellenburg, P., Severijns, N., Shiers, D., Thorne, J. A., Weis, A., Wursten, E., Zejma, J., Zenner, J., and Zsigmond, G.

Subjects
Physics - Instrumentation and Detectors, High Energy Physics - Experiment
Abstract

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, we have investigated the dependence upon these field gradients of spin depolarization rates and also of shifts in the measured neutron Larmor precession frequency. We find excellent qualitative agreement, with gravitationally enhanced depolarization accounting for several previously unexplained features in the data., Comment: 10 pages, 6 figures. Updated: section added about implications for current nEDM limit

Published
2015
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11. Observation of gravitationally induced vertical striation of polarized ultracold neutrons by spin-echo spectroscopy

Author

Afach, S., Ayres, N. J., Ban, G., Bison, G., Bodek, K., Chowdhuri, Z., Daum, M., Fertl, M., Franke, B., Griffith, W. C., Grujić, Z. D., Harris, P. G., Heil, W., Hélaine, V., Kasprzak, M., Kermaidic, Y., Kirch, K., Knowles, P., Koch, H. -C., Komposch, S., Kozela, A., Krempel, J., Lauss, B., Lefort, T., Lemière, Y., Mtchedlishvili, A., Musgrave, M., Naviliat-Cuncic, O., Pendlebury, J. M., Piegsa, F. M., Pignol, G., Plonka-Spehr, C., Prashanth, P. N., Quéméner, G., Rawlik, M., Rebreyend, D., Ries, D., Roccia, S., Rozpedzik, D., Schmidt-Wellenburg, P., Severijns, N., Thorne, J. A., Weis, A., Wursten, E., Wyszynski, G., Zejma, J., Zenner, J., and Zsigmond, G.

Subjects
Physics - Instrumentation and Detectors, Nuclear Experiment
Abstract

We describe a spin-echo method for ultracold neutrons (UCNs) confined in a precession chamber and exposed to a $|B_0|=1~\text{\mu T}$ magnetic field. We have demonstrated that the analysis of UCN spin-echo resonance signals in combination with knowledge of the ambient magnetic field provides an excellent method by which to reconstruct the energy spectrum of a confined ensemble of neutrons. The method takes advantage of the relative dephasing of spins arising from a gravitationally induced striation of stored UCN of different energies, and also permits an improved determination of the vertical magnetic-field gradient with an exceptional accuracy of $1.1~\text{pT/cm}$. This novel combination of a well-known nuclear resonance method and gravitationally induced vertical striation is unique in the realm of nuclear and particle physics and should prove to be invaluable for the assessment of systematic effects in precision experiments such as searches for an electric dipole moment of the neutron or the measurement of the neutron lifetime., Comment: 7 pages 5 figures, accepted by PRL, September, 08 2015

Published
2015
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12. Measurement of a false electric dipole moment signal from $^{199}$Hg atoms exposed to an inhomogeneous magnetic field

Author

Afach, S., Baker, C. A., Ban, G., Bison, G., Bodek, K., Chowdhuri, Z., Daum, M., Fertl, M., Franke, B., Geltenbort, P., Green, K., van der Grinten, M. G. D., Grujic, Z., Harris, P. G., Heil, W., Hélaine, V., Henneck, R., Horras, M., Iaydjiev, P., Ivanov, S. N., Kasprzak, M., Kermaïdic, Y., Kirch, K., Knowles, P., Koch, H. -C., Komposch, S., Kozela, A., Krempel, J., Lauss, B., Lefort, T., Lemière, Y., Mtchedlishvili, A., Naviliat-Cuncic, O., Pendlebury, J. M., Piegsa, F. M., Pignol, G., Prashant, P. N., Quéméner, G., Rebreyend, D., Ries, D., Roccia, S., Schmidt-Wellenburg, P., Severijns, N., Weis, A., Wursten, E., Wyszynski, G., Zejma, J., Zenner, J., and Zsigmond, G.

Subjects
Physics - Atomic Physics, Nuclear Experiment
Abstract

We report on the measurement of a Larmor frequency shift proportional to the electric-field strength for $^{199}{\rm Hg}$ atoms contained in a volume permeated with aligned magnetic and electric fields. This shift arises from the interplay between the inevitable magnetic field gradients and the motional magnetic field. The proportionality to electric-field strength makes it apparently similar to an electric dipole moment (EDM) signal, although unlike an EDM this effect is P- and T-conserving. We have used a neutron magnetic resonance EDM spectrometer, featuring a mercury co-magnetometer and an array of external cesium magnetometers, to measure the shift as a function of the applied magnetic field gradient. Our results are in good agreement with theoretical expectations.

Published
2015
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13. Design and performance of an absolute $^3$He/Cs magnetometer

Author

Koch, H. -C., Bison, G., Grujić, Z. D., Heil, W., Kasprzak, M., Knowles, P., Kraft, A., Pazgalev, A., Schnabel, A., Voigt, J., and Weis, A.

Subjects
Physics - Atomic Physics
Abstract

We report on the design and performance of a highly sensitive combined $^3$He/Cs magnetometer for the absolute measurement of magnetic fields. The magnetometer relies on the magnetometric detection of the free spin precession of nuclear spin polarized $^3$He gas by optically pumped cesium magnetometers. We plan to deploy this type of combined magnetometer in an experiment searching for a permanent electric dipole moment of ultracold neutrons at the Paul Scherrer Institute (Switzerland). A prototype magnetometer was built at the University of Fribourg (Switzerland) and tested at Physikalisch-Technische Bundesanstalt (Berlin, Germany). We demonstrate that the combined magnetometer allows Cram\'er-Rao- limited field determinations with recording times in the range of $\sim 500\mathrm{s}$, measurements above $500\mathrm{s}$ being limited by the stability of the applied magnetic field. % With a $100\mathrm{s}$ recording time we were able to perform an absolute measurement of a magnetic field of $\approx1\mathrm{\mu T}$ with a standard uncertainty of $\Delta B\sim60\mathrm{fT}$, corresponding to $\Delta B/B<$6$\times$10$^{-8}$., Comment: The final publication is available at Springer via http://dx.doi.org/10.1140/epjd/e2015-60018-7

Published
2015
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14. Constraining interactions mediated by axion-like particles with ultracold neutrons

Author

Afach, S., Ban, G., Bison, G., Bodek, K., Burghoff, M., Daum, M., Fertl, M., Franke, B., Grujić, Z. D., Hélaine, V., Kasprzak, M., Kermaïdic, Y., Kirch, K., Knowles, P., Koch, H. -C., Komposch, S., Kozela, A., Krempel, J., Lauss, B., Lefort, T., Lemière, Y., Mtchedlishvili, A., Naviliat-Cuncic, O., Piegsa, F. M., Pignol, G., Prashanth, P. N., Quéméner, G., Rebreyend, D., Ries, D., Roccia, S., Schmidt-Wellenburg, P., Schnabel, A., Severijns, N., Voigt, J., Weis, A., Zejma, G. Wyszynski J., Zenner, J., and Zsigmond, G.

Subjects
High Energy Physics - Experiment, High Energy Physics - Phenomenology
Abstract

We report a new limit on a possible short range spin-dependent interaction from the precise measurement of the ratio of Larmor precession frequencies of stored ultracold neutrons and $^{199}$Hg atoms confined in the same volume. The measurement was performed in a $\sim$1$\mu$ T vertical magnetic holding field with the apparatus searching for a permanent electric dipole moment of the neutron at the Paul Scherrer Institute. A possible coupling between freely precessing polarized neutron spins and unpolarized nucleons of the wall material can be investigated by searching for a tiny change of the precession frequencies of neutron and mercury spins. Such a frequency change can be interpreted as a consequence of a short range spin-dependent interaction that could possibly be mediated by axions or axion-like particles. The interaction strength is proportional to the CP violating product of scalar and pseudoscalar coupling constants $g_Sg_P$. Our result confirms limits from complementary experiments with spin-polarized nuclei in a model-independent way. Limits from other neutron experiments are improved by up to two orders of magnitude in the interaction range of $10^{-6}<\lambda<10^{-4}$ m.

Published
2014
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15. A measurement of the neutron to 199Hg magnetic moment ratio

Author

Afach, S., Baker, C. A., Ban, G., Bison, G., Bodek, K., Burghoff, M., Chowdhuri, Z., Daum, M., Fertl, M., Franke, B., Geltenbort, P., Green, K., van der Grinten, M. G. D., Grujic, Z., Harris, P. G., Heil, W., Hélaine, V., Henneck, R., Horras, M., Iaydjiev, P., Ivanov, S. N., Kasprzak, M., Kermaïdic, Y., Kirch, K., Knecht, A., Koch, H. -C., Krempel, J., Kuźniak, M., Lauss, B., Lefort, T., Lemière, Y., Mtchedlishvili, A., Naviliat-Cuncic, O., Pendlebury, J. M., Perkowski, M., Pierre, E., Piegsa, F. M., Pignol, G., Prashanth, P. N., Quéméner, G., Rebreyend, D., Ries, D., Roccia, S., Schmidt-Wellenburg, P., Schnabel, A., Severijns, N., Shiers, D., Smith, K. F., Voigt, J., Weis, A., Wyszynski, G., Zejma, J., Zenner, J., and Zsigmond, G.

Subjects
Nuclear Experiment, Physics - Atomic Physics, Physics - Instrumentation and Detectors
Abstract

The neutron gyromagnetic ratio has been measured relative to that of the 199Hg atom with an uncertainty of 0.8 ppm. We employed an apparatus where ultracold neutrons and mercury atoms are stored in the same volume and report the result $\gamma_{\rm n}/\gamma_{\rm Hg} = 3.8424574(30)$.

Published
2014
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16. Dynamic stabilization of the magnetic field surrounding the neutron electric dipole moment spectrometer at the Paul Scherrer Institute

Author

Afach, S., Bison, G., Bodek, K., Burri, F., Chowdhuri, Z., Daum, M., Fertl, M., Franke, B., Grujic, Z., Helaine, V., Henneck, R., Kasprzak, M., Kirch, K., Koch, H. -C., Kozela, A., Krempel, J., Lauss, B., Lefort, T., Lemiere, Y., Meier, M., Naviliat-Cuncic, O., Piegsa, F. M., Pignol, G., Plonka-Spehr, C., Prashanth, P. N., Quemener, G., Rebreyend, D., Roccia, S., Schmidt-Wellenburg, P., Schnabel, A., Severijns, N., Voigt, J., Weis, A., Wyszynski, G., Zejma, J., Zenner, J., and Zsigmond, G.

Subjects
Physics - Instrumentation and Detectors, Nuclear Experiment, Physics - Atomic Physics
Abstract

The Surrounding Field Compensation (SFC) system described in this work is installed around the four-layer Mu-metal magnetic shield of the neutron electric dipole moment spectrometer located at the Paul Scherrer Institute. The SFC system reduces the DC component of the external magnetic field by a factor of about 20. Within a control volume of approximately 2.5m x 2.5m x 3m disturbances of the magnetic field are attenuated by factors of 5 to 50 at a bandwidth from $10^{-3}$ Hz up to 0.5 Hz, which corresponds to integration times longer than several hundreds of seconds and represent the important timescale for the nEDM measurement. These shielding factors apply to random environmental noise from arbitrary sources. This is achieved via a proportional-integral feedback stabilization system that includes a regularized pseudoinverse matrix of proportionality factors which correlates magnetic field changes at all sensor positions to current changes in the SFC coils., Comment: 33 pages, 18 figures

Published
2014
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17. An Improved Search for the Neutron Electric Dipole Moment

Author

Burghoff, M., Schnabel, A., Ban, G., Lefort, T., Lemiere, Y., Naviliat-Cuncic, O., Pierre, E., Quemener, G., Zejma, J., Kasprzak, M., Knowles, P., Weis, A., Pignol, G., Rebreyend, D., Afach, S., Bison, G., Becker, J., Severijns, N., Roccia, S., Plonka-Spehr, C., Zennerz, J., Heil, W., Koch, H. C., Kraft, A., Lauer, T., Sobolev, Yu., Chowdhuri, Z., Krempel, J., Lauss, B., Mtchedlishvili, A., Schmidt-Wellenburg, P., Zsigmond, G., Fertl, M., Franke, B., Horras, M., Kirch, K., and Piegsa, F.

Subjects
Nuclear Experiment, Physics - Instrumentation and Detectors
Abstract

A permanent electric dipole moment of fundamental spin-1/2 particles violates both parity (P) and time re- versal (T) symmetry, and hence, also charge-parity (CP) symmetry since there is no sign of CPT-violation. The search for a neutron electric dipole moment (nEDM) probes CP violation within and beyond the Stan- dard Model. The experiment, set up at the Paul Scherrer Institute (PSI), an improved, upgraded version of the apparatus which provided the current best experimental limit, dn < 2.9E-26 ecm (90% C.L.), by the RAL/Sussex/ILL collaboration: Baker et al., Phys. Rev. Lett. 97, 131801 (2006). In the next two years we aim to improve the sensitivity of the apparatus to sigma(dn) = 2.6E-27 ecm corresponding to an upper limit of dn < 5E-27 ecm (95% C.L.), in case for a null result. In parallel the collaboration works on the design of a new apparatus to further increase the sensitivity to sigma(dn) = 2.6E-28 ecm., Comment: APS Division for particles and fields, Conference Proceedings, Two figures

Published
2011

18. Mapping of the magnetic field to correct systematic effects in a neutron electric dipole moment experiment

Author

Abel, C., primary, Ayres, N. J., additional, Ban, G., additional, Bison, G., additional, Bodek, K., additional, Bondar, V., additional, Chanel, E., additional, Chiu, P.-J., additional, Clément, B., additional, Crawford, C. B., additional, Daum, M., additional, Emmenegger, S., additional, Ferraris-Bouchez, L., additional, Fertl, M., additional, Flaux, P., additional, Fratangelo, A., additional, Griffith, W. C., additional, Grujić, Z. D., additional, Harris, P. G., additional, Hayen, L., additional, Hild, N., additional, Kasprzak, M., additional, Kirch, K., additional, Knowles, P., additional, Koch, H.-C., additional, Koss, P. A., additional, Kozela, A., additional, Krempel, J., additional, Lauss, B., additional, Lefort, T., additional, Lemière, Y., additional, Mohanmurthy, P., additional, Naviliat-Cuncic, O., additional, Pais, D., additional, Piegsa, F. M., additional, Pignol, G., additional, Prashanth, P. N., additional, Quéméner, G., additional, Rawlik, M., additional, Ries, D., additional, Rebreyend, D., additional, Roccia, S., additional, Rozpedzik, D., additional, Schmidt-Wellenburg, P., additional, Schnabel, A., additional, Severijns, N., additional, Thorne, J. A., additional, Virot, R., additional, Weis, A., additional, Wursten, E., additional, Wyszynski, G., additional, Zejma, J., additional, and Zsigmond, G., additional

Published
2022
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22. The Eleventh National Council

Author

Williams, Lewis W., McAllister, Abel J., Wise, Clayton R., Whinery, S. M., Bauder, Chas. F., Smith, Homer J., Touton, Frank C., Childs, H. G., Evenden, E. S., Gray, William S., Lincoln, Edward A., Sealock, W. E., Woody, Clifford, Loomis, Arthur K., Walk, George E., Livengood, Fred C., Koch, H. C., Thiel, R. M., Stigler, Oren, Byrne, Thad, Fritz, Martin F., and Sweetland, T. O.

Published
1925

23. The Fourteenth National Council

Author

Gray, William S., Alexander, Carter, Williams, Lewis W., Cook, Paul M., Koch, H. C., Collins, E. A., Morgan, Walter E., Davis, Burton Elsworth, Dolch, E. W., Haynes, Benjamin R., Holy, T. C., Hulse, M. L., Joyal, A. E., Keys, Noel, Munzenmayer, L. H., Lamport, Harold B., O'Rourke, J. M., Payne, E. George, Powers, F. F., Rainey, Frederick A., Schmidt, C. C., Rugg, Earle U., Umstattd, J. G., Van Houten, L. H., and Waterman, Ivan R.

Published
1931

25. A search for neutron to mirror-neutron oscillations using the nEDM apparatus at PSI

Author

Abel, C., primary, Ayres, N.J., additional, Ban, G., additional, Bison, G., additional, Bodek, K., additional, Bondar, V., additional, Chanel, E., additional, Chiu, P.-J., additional, Crawford, C., additional, Daum, M., additional, Dinani, R.T., additional, Emmenegger, S., additional, Flaux, P., additional, Ferraris-Bouchez, L., additional, Griffith, W.C., additional, Grujić, Z.D., additional, Hild, N., additional, Kirch, K., additional, Koch, H.-C., additional, Koss, P.A., additional, Kozela, A., additional, Krempel, J., additional, Lauss, B., additional, Lefort, T., additional, Leredde, A., additional, Mohanmurthy, P., additional, Naviliat-Cuncic, O., additional, Pais, D., additional, Piegsa, F.M., additional, Pignol, G., additional, Rawlik, M., additional, Rebreyend, D., additional, Rienäcker, I., additional, Ries, D., additional, Roccia, S., additional, Rozpedzik, D., additional, Schmidt-Wellenburg, P., additional, Severijns, N., additional, Thorne, J., additional, Weis, A., additional, Wursten, E., additional, Zejma, J., additional, and Zsigmond, G., additional

Published
2021
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26. Optically pumped Cs magnetometers enabling a high-sensitivity search for the neutron electric dipole moment

Author

Abel, C., primary, Afach, S., additional, Ayres, N. J., additional, Ban, G., additional, Bison, G., additional, Bodek, K., additional, Bondar, V., additional, Chanel, E., additional, Chiu, P.-J., additional, Crawford, C. B., additional, Chowdhuri, Z., additional, Daum, M., additional, Emmenegger, S., additional, Ferraris-Bouchez, L., additional, Fertl, M., additional, Franke, B., additional, Griffith, W. C., additional, Grujić, Z. D., additional, Hayen, L., additional, Hélaine, V., additional, Hild, N., additional, Kasprzak, M., additional, Kermaidic, Y., additional, Kirch, K., additional, Knowles, P., additional, Koch, H.-C., additional, Komposch, S., additional, Koss, P. A., additional, Kozela, A., additional, Krempel, J., additional, Lauss, B., additional, Lefort, T., additional, Lemière, Y., additional, Leredde, A., additional, Mtchedlishvili, A., additional, Mohanmurthy, P., additional, Musgrave, M., additional, Naviliat-Cuncic, O., additional, Pais, D., additional, Pazgalev, A., additional, Piegsa, F. M., additional, Pierre, E., additional, Pignol, G., additional, Prashanth, P. N., additional, Quéméner, G., additional, Rawlik, M., additional, Rebreyend, D., additional, Ries, D., additional, Roccia, S., additional, Rozpedzik, D., additional, Schmidt-Wellenburg, P., additional, Schnabel, A., additional, Severijns, N., additional, Dinani, R. Tavakoli, additional, Thorne, J., additional, Weis, A., additional, Wursten, E., additional, Wyszynski, G., additional, Zejma, J., additional, and Zsigmond, G., additional

Published
2020
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27. Measurement of the Permanent Electric Dipole Moment of the Neutron

Author

Abel, C., primary, Afach, S., additional, Ayres, N. J., additional, Baker, C. A., additional, Ban, G., additional, Bison, G., additional, Bodek, K., additional, Bondar, V., additional, Burghoff, M., additional, Chanel, E., additional, Chowdhuri, Z., additional, Chiu, P.-J., additional, Clement, B., additional, Crawford, C. B., additional, Daum, M., additional, Emmenegger, S., additional, Ferraris-Bouchez, L., additional, Fertl, M., additional, Flaux, P., additional, Franke, B., additional, Fratangelo, A., additional, Geltenbort, P., additional, Green, K., additional, Griffith, W. C., additional, van der Grinten, M., additional, Grujić, Z. D., additional, Harris, P. G., additional, Hayen, L., additional, Heil, W., additional, Henneck, R., additional, Hélaine, V., additional, Hild, N., additional, Hodge, Z., additional, Horras, M., additional, Iaydjiev, P., additional, Ivanov, S. N., additional, Kasprzak, M., additional, Kermaidic, Y., additional, Kirch, K., additional, Knecht, A., additional, Knowles, P., additional, Koch, H.-C., additional, Koss, P. A., additional, Komposch, S., additional, Kozela, A., additional, Kraft, A., additional, Krempel, J., additional, Kuźniak, M., additional, Lauss, B., additional, Lefort, T., additional, Lemière, Y., additional, Leredde, A., additional, Mohanmurthy, P., additional, Mtchedlishvili, A., additional, Musgrave, M., additional, Naviliat-Cuncic, O., additional, Pais, D., additional, Piegsa, F. M., additional, Pierre, E., additional, Pignol, G., additional, Plonka-Spehr, C., additional, Prashanth, P. N., additional, Quéméner, G., additional, Rawlik, M., additional, Rebreyend, D., additional, Rienäcker, I., additional, Ries, D., additional, Roccia, S., additional, Rogel, G., additional, Rozpedzik, D., additional, Schnabel, A., additional, Schmidt-Wellenburg, P., additional, Severijns, N., additional, Shiers, D., additional, Tavakoli Dinani, R., additional, Thorne, J. A., additional, Virot, R., additional, Voigt, J., additional, Weis, A., additional, Wursten, E., additional, Wyszynski, G., additional, Zejma, J., additional, Zenner, J., additional, and Zsigmond, G., additional

Published
2020
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30. Magnetic-field uniformity in neutron electric-dipole-moment experiments

Author

Abel, C., Ayres, N. J., Baker, T., Ban, G., Bison, G., Bodek, K., Bondar, V., Crawford, C. B., Chiu, P.-J., Chanel, E., Chowdhuri, Z., Daum, M., Dechenaux, B., Emmenegger, S., Ferraris-Bouchez, L., Flaux, P., Geltenbort, P., Green, K., Griffith, W. C., Grinten, M. van der, Harris, P. G., Henneck, R., Hild, N., Iaydjiev, P., Ivanov, S. N., Kasprzak, M., Kermaidic, Y., Kirch, K., Koch, H.-C., Komposch, S., Koss, P. A., Kozela, A., Krempel, J., Lauss, B., Lefort, T., Lemiere, Y., Leredde, A., Mohanmurthy, P., Pais, D., Piegsa, F. M., Pignol, G., Quéméner, G., Rawlik, M., Rebreyend, D., Ries, D., Roccia, S., Rozpedzik, D., Schmidt-Wellenburg, P., Schnabel, A., Severijns, N., Virot, R., Weis, Antoine, Wursten, E., Wyszynski, G., Zejma, J., Zsigmond, G., Abel, C., Ayres, N. J., Baker, T., Ban, G., Bison, G., Bodek, K., Bondar, V., Crawford, C. B., Chiu, P.-J., Chanel, E., Chowdhuri, Z., Daum, M., Dechenaux, B., Emmenegger, S., Ferraris-Bouchez, L., Flaux, P., Geltenbort, P., Green, K., Griffith, W. C., Grinten, M. van der, Harris, P. G., Henneck, R., Hild, N., Iaydjiev, P., Ivanov, S. N., Kasprzak, M., Kermaidic, Y., Kirch, K., Koch, H.-C., Komposch, S., Koss, P. A., Kozela, A., Krempel, J., Lauss, B., Lefort, T., Lemiere, Y., Leredde, A., Mohanmurthy, P., Pais, D., Piegsa, F. M., Pignol, G., Quéméner, G., Rawlik, M., Rebreyend, D., Ries, D., Roccia, S., Rozpedzik, D., Schmidt-Wellenburg, P., Schnabel, A., Severijns, N., Virot, R., Weis, Antoine, Wursten, E., Wyszynski, G., Zejma, J., and Zsigmond, G.

Abstract

Magnetic-field uniformity is of the utmost importance in experiments to measure the electric dipole moment of the neutron. A general parametrization of the magnetic field in terms of harmonic polynomial modes is proposed, going beyond the linear- gradients approximation. We review the main undesirable effects of nonuniformities: depolarization of ultracold neutrons and Larmor frequency shifts of neutrons and mercury atoms. The theoretical predictions for these effects were verified by dedicated measurements with the single-chamber neutron electric-dipole-moment apparatus installed at the Paul Scherrer Institute.

Published
2019

32. Magnetic-field uniformity in neutron electric-dipole-moment experiments

Author

Abel, C., primary, Ayres, N. J., additional, Baker, T., additional, Ban, G., additional, Bison, G., additional, Bodek, K., additional, Bondar, V., additional, Crawford, C. B., additional, Chiu, P.-J., additional, Chanel, E., additional, Chowdhuri, Z., additional, Daum, M., additional, Dechenaux, B., additional, Emmenegger, S., additional, Ferraris-Bouchez, L., additional, Flaux, P., additional, Geltenbort, P., additional, Green, K., additional, Griffith, W. C., additional, van der Grinten, M., additional, Harris, P. G., additional, Henneck, R., additional, Hild, N., additional, Iaydjiev, P., additional, Ivanov, S. N., additional, Kasprzak, M., additional, Kermaidic, Y., additional, Kirch, K., additional, Koch, H.-C., additional, Komposch, S., additional, Koss, P. A., additional, Kozela, A., additional, Krempel, J., additional, Lauss, B., additional, Lefort, T., additional, Lemiere, Y., additional, Leredde, A., additional, Mohanmurthy, P., additional, Pais, D., additional, Piegsa, F. M., additional, Pignol, G., additional, Quéméner, G., additional, Rawlik, M., additional, Rebreyend, D., additional, Ries, D., additional, Roccia, S., additional, Rozpedzik, D., additional, Schmidt-Wellenburg, P., additional, Schnabel, A., additional, Severijns, N., additional, Virot, R., additional, Weis, A., additional, Wursten, E., additional, Wyszynski, G., additional, Zejma, J., additional, and Zsigmond, G., additional

Published
2019
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33. Constraining interactions mediated by axion-like particles with ultracold neutrons

Author

Afach S., Ban G., Bison G., Bodek K., Burghoff M., Daum M., Fertl M., Franke B., Grujic Z.D., Hélaine V., Kasprzak M., Kermaïdic Y., Kirch K., Knowles P., Koch H.-C., Komposch S., Kozela A., Krempel J., Lauss B., Lefort T., Lemière Y., Mtchedlishvili A., Naviliat-Cuncic O., Piegsa F.M., and Pignol G.

Abstract

We report a new limit on a possible short range spin dependent interaction from the precise measurement of the ratio of Larmor precession frequencies of stored ultracold neutrons and Hg 199 atoms confined in the same volume. The measurement was performed in a ~ 1 µT vertical magnetic holding field with the apparatus searching for a permanent electric dipole moment of the neutron at the Paul Scherrer Institute. A possible coupling between freely precessing polarized neutron spins and unpolarized nucleons of the wall material can be investigated by searching for a tiny change of the precession frequencies of neutron and mercury spins. Such a frequency change can be interpreted as a consequence of a short range spin dependent interaction that could possibly be mediated by axions or axion like particles. The interaction strength is proportional to the \{CP\} violating product of scalar and pseudoscalar coupling constants g S g P . Our result confirms limits from complementary experiments with spin polarized nuclei in a model independent way. Limits from other neutron experiments are improved by up to two orders of magnitude in the interaction range of 10 - 6 lt; ? lt; 10 - 4 m .

Published
2015

34. Search for Axionlike Dark Matter through Nuclear Spin Precession in Electric and Magnetic Fields

Author

Abel, C., Ayres, N.J., Ban, G., Bison, G., Bodek, K., Bondar, V., Daum, M., Fairbairn, M., Flambaum, V.V., Geltenbort, P., Green, K., Griffith, W.C., van der Grinten, M., Grujić, Z.D., Harris, P.G., Hild, N., Iaydjiev, P., Ivanov, S.N., Kasprzak, M., Kermaidic, Y., Kirch, K., Koch, H.-C., Komposch, S., Koss, P.A., Kozela, A., Krempel, J., Lauss, B., Lefort, T., Lemière, Y., Marsh, D.J.E., Mohanmurthy, P., Mtchedlishvili, A., Musgrave, M., Piegsa, F.M., Pignol, G., Rawlik, M., Rebreyend, D., Ries, D., Roccia, S., Rozpędzik, D., Schmidt-Wellenburg, P., Severijns, N., Shiers, D., Stadnik, Y.V., Weis, A., Wursten, E., Zejma, J., Zsigmond, G., Laboratoire de physique corpusculaire de Caen (LPCC), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Institut Laue-Langevin (ILL), ILL, Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA), Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Normandie Université (NU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Laboratoire de physique corpusculaire de Caen ( LPCC ), Université de Caen Normandie ( UNICAEN ), Normandie Université ( NU ) -Normandie Université ( NU ) -Ecole Nationale Supérieure d'Ingénieurs de Caen ( ENSICAEN ), Normandie Université ( NU ) -Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -Centre National de la Recherche Scientifique ( CNRS ), Institut Laue-Langevin ( ILL ), Laboratoire de Physique Subatomique et de Cosmologie ( LPSC ), Université Joseph Fourier - Grenoble 1 ( UJF ) -Institut polytechnique de Grenoble - Grenoble Institute of Technology ( Grenoble INP ) -Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique ( CNRS ) -Université Grenoble Alpes ( UGA ), Centre de Sciences Nucléaires et de Sciences de la Matière ( CSNSM ), and Université Paris-Sud - Paris 11 ( UP11 ) -Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -Centre National de la Recherche Scientifique ( CNRS )

Subjects
axions, Cosmology and Nongalactic Astrophysics (astro-ph.CO), [PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th], Nuclear Theory, Atomic Physics (physics.atom-ph), Physics::Instrumentation and Detectors, [ PHYS.ASTR ] Physics [physics]/Astrophysics [astro-ph], QC1-999, FOS: Physical sciences, magnetic field, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], dark matter, Physics - Atomic Physics, Nuclear Theory (nucl-th), High Energy Physics::Theory, High Energy Physics - Phenomenology (hep-ph), [ PHYS.PHYS.PHYS-GEN-PH ] Physics [physics]/Physics [physics]/General Physics [physics.gen-ph], [ PHYS.NEXP ] Physics [physics]/Nuclear Experiment [nucl-ex], axion: coupling, Nuclear Experiment (nucl-ex), gluon: coupling, Nuclear Experiment, [ PHYS.NUCL ] Physics [physics]/Nuclear Theory [nucl-th], spin: precession, axion: dark matter, n: electric moment, nucleus: spin, atom, Physics, High Energy Physics::Phenomenology, spin precession, oscillation, [PHYS.PHYS.PHYS-GEN-PH]Physics [physics]/Physics [physics]/General Physics [physics.gen-ph], neutron electric dipole moment, electric field, High Energy Physics - Phenomenology, S029IAN, [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph], [ PHYS.HPHE ] Physics [physics]/High Energy Physics - Phenomenology [hep-ph], axion: mass, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], experimental results, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

We report on a search for ultralow-mass axionlike dark matter by analyzing the ratio of the spinprecession frequencies of stored ultracold neutrons and 199Hg atoms for an axion-induced oscillating electric dipole moment of the neutron and an axion-wind spin-precession effect. No signal consistent with dark matter is observed for the axion mass range 10−24 ≤ ma ≤ 10−17 eV. Our null result sets the first laboratory constraints on the coupling of axion dark matter to gluons, which improve on astrophysical limits by up to 3 orders of magnitude, and also improves on previous laboratory constraints on the axion coupling to nucleons by up to a factor of 40. ispartof: Physical Review X vol:7 issue:4 status: published

Published
2017
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35. Demonstration of sensitivity increase in mercury free-spin-precession magnetometers due to laser-based readout for neutron electric dipole moment searches

Author

Ban, G., primary, Bison, G., additional, Bodek, K., additional, Daum, M., additional, Fertl, M., additional, Franke, B., additional, Grujić, Z.D., additional, Heil, W., additional, Horras, M., additional, Kasprzak, M., additional, Kermaidic, Y., additional, Kirch, K., additional, Koch, H.-C., additional, Komposch, S., additional, Kozela, A., additional, Krempel, J., additional, Lauss, B., additional, Lefort, T., additional, Mtchedlishvili, A., additional, Pignol, G., additional, Piegsa, F.M., additional, Prashanth, P., additional, Quéméner, G., additional, Rawlik, M., additional, Rebreyend, D., additional, Ries, D., additional, Roccia, S., additional, Rozpedzik, D., additional, Schmidt-Wellenburg, P., additional, Severijns, N., additional, Weis, A., additional, Wyszynski, G., additional, Zejma, J., additional, and Zsigmond, G., additional

Published
2018
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36. News and Communications

Author

Koch, H. C., Freeman, F. N., Taylor, Howard, and Driftmier, Erna

Published
1927

38. Notes from the Chapters

Author

Peters, Chester J., Palmer, P. L., Troxel, O. L., Garlin, R. E., Roaney, M. B., Keboch, F. D., Schmerber, Louis J., Koch, H. C., Crabb, A. L., Avery, Frank D., Klopp, H. J., McDaniel, H. B., and Knapp, N. B.

Published
1925

39. Losses and depolarization of ultracold neutrons on neutron guide and storage materials

Author

Bondar, V., primary, Chesnevskaya, S., additional, Daum, M., additional, Franke, B., additional, Geltenbort, P., additional, Göltl, L., additional, Gutsmiedl, E., additional, Karch, J., additional, Kasprzak, M., additional, Kessler, G., additional, Kirch, K., additional, Koch, H.-C., additional, Kraft, A., additional, Lauer, T., additional, Lauss, B., additional, Pierre, E., additional, Pignol, G., additional, Reggiani, D., additional, Schmidt-Wellenburg, P., additional, Sobolev, Yu., additional, Zechlau, T., additional, and Zsigmond, G., additional

Published
2017
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40. A Revised Experimental Upper Limit on the Electric Dipole Moment of the Neutron

Author

Pendlebury, J M, Afach, S, Ayres, N J, Baker, C A, Ban, G, Bison, G, Bodek, K, Burghoff, M, Geltenbort, P, Green, K, Griffith, W C, van der Grinten, M, Grujic, Z D, Harris, P G, Helaine, V, Iaydjiev, P, Ivanov, S N, Kasprzak, M, Kermaidic, Y, Kirch, K, Koch, H-C, Komposch, S, Kozela, A, Krempel, J, Lauss, B, Lefort, T, Lemiere, Y, May, D J R, Musgrave, M, Naviliat-Cuncic, O, Piegsa, F M, Pignol, G, Prashanth, P N, Quéméner, G, Rawlik, M, Rebreyend, D, Richardson, J D, Ries, D, Roccia, S, Rozpedzik, D, Schnabel, A, Schmidt-Wellenburg, P, Severijns, N, Shiers, D, Thorne, J A, Weis, A, Winston, O J, Wursten, E, Zejma, J, Zsigmond, G, Laboratoire de physique corpusculaire de Caen (LPCC), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Institut Laue-Langevin (ILL), ILL, Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), CSNSM SNO, Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Nuclear and High Energy Physics, Physics - Instrumentation and Detectors, FOS: Physical sciences, Magnitude (mathematics), 01 natural sciences, Resonance (particle physics), High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), Quantum mechanics, Paul-Scherrer Institute, Cesium atom, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Neutron, Limit (mathematics), 010306 general physics, Physics, Conservation law, magnetic-moment, Magnetic moment, 010308 nuclear & particles physics, Instrumentation and Detectors (physics.ins-det), QC0793, Atomic-Mercury magnetometer, Electric dipole moment, resonance, Quantum electrodynamics, Ultracold neutrons, Particle Physics - Experiment
Abstract

We present for the first time a detailed and comprehensive analysis of the experimental results that set the current world sensitivity limit on the magnitude of the electric dipole moment (EDM) of the neutron. We have extended and enhanced our earlier analysis to include recent developments in the understanding of the effects of gravity in depolarizing ultracold neutrons (UCN); an improved calculation of the spectrum of the neutrons; and conservative estimates of other possible systematic errors, which are also shown to be consistent with more recent measurements undertaken with the apparatus. We obtain a net result of $d_\mathrm{n} = -0.21 \pm 1.82 \times10^{-26}$ $e$cm, which may be interpreted as a slightly revised upper limit on the magnitude of the EDM of $3.0 \times10^{-26}$ $e$cm (90% CL) or $ 3.6 \times10^{-26}$ $e$cm (95% CL). This paper is dedicated by the remaining authors to the memory of Prof. J. Michael Pendlebury., 23 pages, 19 figures. Authorship list changed to put J.M. Pendlebury first. Other very minor edits

Published
2015
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41. Revised experimental upper limit on the electric dipole moment of the neutron

Author

Pendlebury, J. M., Afach, S., Ayres, N. J., Baker, C. A., Ban, G., Bison, Georg, Bodek, K., Burghoff, M., Geltenbort, P., Green, K., Griffith, W. C., Grinten, M. van der, Grujić, Z. D., Harris, P. G., Hélaine, V., Iaydjiev, P., Ivanov, S. N., Kasprzak, M., Kermaidic, Y., Kirch, K., Koch, H.-C., Komposch, S., Kozela, A., Krempel, J., Lauss, B., Lefort, T., Lemière, Y., May, D. J. R., Musgrave, M., Naviliat-Cuncic, O., Piegsa, F. M., Pignol, G., Prashanth, P. N., Quéméner, G., Rawlik, M., Rebreyend, D., Richardson, J. D., Ries, D., Roccia, S., Rozpedzik, D., Schnabel, A., Schmidt-Wellenburg, P., Severijns, N., Shiers, D., Thorne, J. A., Weis, Antoine, Winston, O. J., Wursten, E., Zejma, J., Zsigmond, G., Pendlebury, J. M., Afach, S., Ayres, N. J., Baker, C. A., Ban, G., Bison, Georg, Bodek, K., Burghoff, M., Geltenbort, P., Green, K., Griffith, W. C., Grinten, M. van der, Grujić, Z. D., Harris, P. G., Hélaine, V., Iaydjiev, P., Ivanov, S. N., Kasprzak, M., Kermaidic, Y., Kirch, K., Koch, H.-C., Komposch, S., Kozela, A., Krempel, J., Lauss, B., Lefort, T., Lemière, Y., May, D. J. R., Musgrave, M., Naviliat-Cuncic, O., Piegsa, F. M., Pignol, G., Prashanth, P. N., Quéméner, G., Rawlik, M., Rebreyend, D., Richardson, J. D., Ries, D., Roccia, S., Rozpedzik, D., Schnabel, A., Schmidt-Wellenburg, P., Severijns, N., Shiers, D., Thorne, J. A., Weis, Antoine, Winston, O. J., Wursten, E., Zejma, J., and Zsigmond, G.

Abstract

We present for the first time a detailed and comprehensive analysis of the experimental results that set the current world sensitivity limit on the magnitude of the electric dipole moment (EDM) of the neutron. We have extended and enhanced our earlier analysis to include recent developments in the understanding of the effects of gravity in depolarizing ultracold neutrons; an improved calculation of the spectrum of the neutrons; and conservative estimates of other possible systematic errors, which are also shown to be consistent with more recent measurements undertaken with the apparatus. We obtain a net result of dn=−0.21±1.82×10−26 e cm, which may be interpreted as a slightly revised upper limit on the magnitude of the EDM of 3.0×10−26 e cm (90% C.L.) or 3.6×10−26 e cm (95% C.L.).

Published
2016

42. Constraining interactions mediated by axion-like particles with ultracold neutrons

Author

Afach, S., Ban, Gert, Bison, Georg, Bodek, K., Burghoff, M., Daum, M., Fertl, M., Franke, B., Grujić, Z.D., Hélaine, V., Kasprzak, Malgorzata, Kermaïdic, Y., Kirch, K., Knowles, Paul E., Koch, H.-C., Komposch, S., Kozela, A., Krempel, J., Lauss, B., Lefort, , T., Lemière, Y., Mtchedlishvili, A., Naviliat-Cuncic, O., Piegsa, F.M., Pignol, G., Prashanth, P.N., Quéméner, G., Rebreyend, D., Ries, D., Roccia, S., Schmidt-Wellenburg, P., Schnabel, A., Severijns, N., Voigt, J., Weis, Antoine, Wyszynski, G., Zejma, J., Zenner, J., Zsigmond, G., Afach, S., Ban, Gert, Bison, Georg, Bodek, K., Burghoff, M., Daum, M., Fertl, M., Franke, B., Grujić, Z.D., Hélaine, V., Kasprzak, Malgorzata, Kermaïdic, Y., Kirch, K., Knowles, Paul E., Koch, H.-C., Komposch, S., Kozela, A., Krempel, J., Lauss, B., Lefort, , T., Lemière, Y., Mtchedlishvili, A., Naviliat-Cuncic, O., Piegsa, F.M., Pignol, G., Prashanth, P.N., Quéméner, G., Rebreyend, D., Ries, D., Roccia, S., Schmidt-Wellenburg, P., Schnabel, A., Severijns, N., Voigt, J., Weis, Antoine, Wyszynski, G., Zejma, J., Zenner, J., and Zsigmond, G.

Published
2015

43. Revised experimental upper limit on the electric dipole moment of the neutron

Author

Pendlebury, J. M., primary, Afach, S., additional, Ayres, N. J., additional, Baker, C. A., additional, Ban, G., additional, Bison, G., additional, Bodek, K., additional, Burghoff, M., additional, Geltenbort, P., additional, Green, K., additional, Griffith, W. C., additional, van der Grinten, M., additional, Grujić, Z. D., additional, Harris, P. G., additional, Hélaine, V., additional, Iaydjiev, P., additional, Ivanov, S. N., additional, Kasprzak, M., additional, Kermaidic, Y., additional, Kirch, K., additional, Koch, H.-C., additional, Komposch, S., additional, Kozela, A., additional, Krempel, J., additional, Lauss, B., additional, Lefort, T., additional, Lemière, Y., additional, May, D. J. R., additional, Musgrave, M., additional, Naviliat-Cuncic, O., additional, Piegsa, F. M., additional, Pignol, G., additional, Prashanth, P. N., additional, Quéméner, G., additional, Rawlik, M., additional, Rebreyend, D., additional, Richardson, J. D., additional, Ries, D., additional, Roccia, S., additional, Rozpedzik, D., additional, Schnabel, A., additional, Schmidt-Wellenburg, P., additional, Severijns, N., additional, Shiers, D., additional, Thorne, J. A., additional, Weis, A., additional, Winston, O. J., additional, Wursten, E., additional, Zejma, J., additional, and Zsigmond, G., additional

Published
2015
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44. Observation of Gravitationally Induced Vertical Striation of Polarized Ultracold Neutrons by Spin-Echo Spectroscopy

Author

Afach, S., primary, Ayres, N. J., additional, Ban, G., additional, Bison, G., additional, Bodek, K., additional, Chowdhuri, Z., additional, Daum, M., additional, Fertl, M., additional, Franke, B., additional, Griffith, W. C., additional, Grujić, Z. D., additional, Harris, P. G., additional, Heil, W., additional, Hélaine, V., additional, Kasprzak, M., additional, Kermaidic, Y., additional, Kirch, K., additional, Knowles, P., additional, Koch, H.-C., additional, Komposch, S., additional, Kozela, A., additional, Krempel, J., additional, Lauss, B., additional, Lefort, T., additional, Lemière, Y., additional, Mtchedlishvili, A., additional, Musgrave, M., additional, Naviliat-Cuncic, O., additional, Pendlebury, J. M., additional, Piegsa, F. M., additional, Pignol, G., additional, Plonka-Spehr, C., additional, Prashanth, P. N., additional, Quéméner, G., additional, Rawlik, M., additional, Rebreyend, D., additional, Ries, D., additional, Roccia, S., additional, Rozpedzik, D., additional, Schmidt-Wellenburg, P., additional, Severijns, N., additional, Thorne, J. A., additional, Weis, A., additional, Wursten, E., additional, Wyszynski, G., additional, Zejma, J., additional, Zenner, J., additional, and Zsigmond, G., additional

Published
2015
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45. Measurement of a false electric dipole moment signal from 199Hg atoms exposed to an inhomogeneous magnetic field

Author

Afach, S., primary, Baker, C. A., additional, Ban, G., additional, Bison, G., additional, Bodek, K., additional, Chowdhuri, Z., additional, Daum, M., additional, Fertl, M., additional, Franke, B., additional, Geltenbort, P., additional, Green, K., additional, van der Grinten, M. G. D., additional, Grujic, Z., additional, Harris, P. G., additional, Heil, W., additional, Hélaine, V., additional, Henneck, R., additional, Horras, M., additional, Iaydjiev, P., additional, Ivanov, S. N., additional, Kasprzak, M., additional, Kermaïdic, Y., additional, Kirch, K., additional, Knowles, P., additional, Koch, H.-C., additional, Komposch, S., additional, Kozela, A., additional, Krempel, J., additional, Lauss, B., additional, Lefort, T., additional, Lemière, Y., additional, Mtchedlishvili, A., additional, Naviliat-Cuncic, O., additional, Pendlebury, J. M., additional, Piegsa, F. M., additional, Pignol, G., additional, Prashant, P. N., additional, Quéméner, G., additional, Rebreyend, D., additional, Ries, D., additional, Roccia, S., additional, Schmidt-Wellenburg, P., additional, Severijns, N., additional, Weis, A., additional, Wursten, E., additional, Wyszynski, G., additional, Zejma, J., additional, Zenner, J., additional, and Zsigmond, G., additional

Published
2015
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46. Gravitational depolarization of ultracold neutrons: Comparison with data

Author

Afach, S., primary, Ayres, N. J., additional, Baker, C. A., additional, Ban, G., additional, Bison, G., additional, Bodek, K., additional, Fertl, M., additional, Franke, B., additional, Geltenbort, P., additional, Green, K., additional, Griffith, W. C., additional, van der Grinten, M., additional, Grujić, Z. D., additional, Harris, P. G., additional, Heil, W., additional, Hélaine, V., additional, Iaydjiev, P., additional, Ivanov, S. N., additional, Kasprzak, M., additional, Kermaidic, Y., additional, Kirch, K., additional, Koch, H.-C., additional, Komposch, S., additional, Kozela, A., additional, Krempel, J., additional, Lauss, B., additional, Lefort, T., additional, Lemière, Y., additional, Musgrave, M., additional, Naviliat-Cuncic, O., additional, Pendlebury, J. M., additional, Piegsa, F. M., additional, Pignol, G., additional, Plonka-Spehr, C., additional, Prashanth, P. N., additional, Quéméner, G., additional, Rawlik, M., additional, Rebreyend, D., additional, Ries, D., additional, Roccia, S., additional, Rozpedzik, D., additional, Schmidt-Wellenburg, P., additional, Severijns, N., additional, Shiers, D., additional, Thorne, J. A., additional, Weis, A., additional, Wursten, E., additional, Zejma, J., additional, Zenner, J., additional, and Zsigmond, G., additional

Published
2015
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47. Highly stable atomic vector magnetometer based on free spin precession

Author

Afach, S., primary, Ban, G., additional, Bison, G., additional, Bodek, K., additional, Chowdhuri, Z., additional, Grujić, Z. D., additional, Hayen, L., additional, Hélaine, V., additional, Kasprzak, M., additional, Kirch, K., additional, Knowles, P., additional, Koch, H.-C., additional, Komposch, S., additional, Kozela, A., additional, Krempel, J., additional, Lauss, B., additional, Lefort, T., additional, Lemière, Y., additional, Mtchedlishvili, A., additional, Naviliat-Cuncic, O., additional, Piegsa, F. M., additional, Prashanth, P. N., additional, Quéméner, G., additional, Rawlik, M., additional, Ries, D., additional, Roccia, S., additional, Rozpedzik, D., additional, Schmidt-Wellenburg, P., additional, Severjins, N., additional, Weis, A., additional, Wursten, E., additional, Wyszynski, G., additional, Zejma, J., additional, and Zsigmond, G., additional

Published
2015
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48. A measurement of the neutron to 199 Hg magnetic moment ratio

Author

Afach, S., primary, Baker, C.A., additional, Ban, G., additional, Bison, G., additional, Bodek, K., additional, Burghoff, M., additional, Chowdhuri, Z., additional, Daum, M., additional, Fertl, M., additional, Franke, B., additional, Geltenbort, P., additional, Green, K., additional, van der Grinten, M.G.D., additional, Grujic, Z., additional, Harris, P.G., additional, Heil, W., additional, Hélaine, V., additional, Henneck, R., additional, Horras, M., additional, Iaydjiev, P., additional, Ivanov, S.N., additional, Kasprzak, M., additional, Kermaïdic, Y., additional, Kirch, K., additional, Knecht, A., additional, Koch, H.-C., additional, Krempel, J., additional, Kuźniak, M., additional, Lauss, B., additional, Lefort, T., additional, Lemière, Y., additional, Mtchedlishvili, A., additional, Naviliat-Cuncic, O., additional, Pendlebury, J.M., additional, Perkowski, M., additional, Pierre, E., additional, Piegsa, F.M., additional, Pignol, G., additional, Prashanth, P.N., additional, Quéméner, G., additional, Rebreyend, D., additional, Ries, D., additional, Roccia, S., additional, Schmidt-Wellenburg, P., additional, Schnabel, A., additional, Severijns, N., additional, Shiers, D., additional, Smith, K.F., additional, Voigt, J., additional, Weis, A., additional, Wyszynski, G., additional, Zejma, J., additional, Zenner, J., additional, and Zsigmond, G., additional

Published
2014
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49. Dynamic stabilization of the magnetic field surrounding the neutron electric dipole moment spectrometer at the Paul Scherrer Institute

Author

Afach, S., primary, Bison, G., additional, Bodek, K., additional, Burri, F., additional, Chowdhuri, Z., additional, Daum, M., additional, Fertl, M., additional, Franke, B., additional, Grujic, Z., additional, Hélaine, V., additional, Henneck, R., additional, Kasprzak, M., additional, Kirch, K., additional, Koch, H.-C., additional, Kozela, A., additional, Krempel, J., additional, Lauss, B., additional, Lefort, T., additional, Lemière, Y., additional, Meier, M., additional, Naviliat-Cuncic, O., additional, Piegsa, F. M., additional, Pignol, G., additional, Plonka-Spehr, C., additional, Prashanth, P. N., additional, Quéméner, G., additional, Rebreyend, D., additional, Roccia, S., additional, Schmidt-Wellenburg, P., additional, Schnabel, A., additional, Severijns, N., additional, Voigt, J., additional, Weis, A., additional, Wyszynski, G., additional, Zejma, J., additional, Zenner, J., additional, and Zsigmond, G., additional

Published
2014
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50. First observation of trapped high-field seeking ultracold neutron spin states

Author

Daum, M., primary, Fierlinger, P., additional, Franke, B., additional, Geltenbort, P., additional, Goeltl, L., additional, Gutsmiedl, E., additional, Karch, J., additional, Kessler, G., additional, Kirch, K., additional, Koch, H.-C., additional, Kraft, A., additional, Lauer, T., additional, Lauss, B., additional, Pierre, E., additional, Pignol, G., additional, Reggiani, D., additional, Schmidt-Wellenburg, P., additional, Sobolev, Yu., additional, Zechlau, T., additional, and Zsigmond, G., additional

Published
2011
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