Description
Theory overview, current status and possible beyond standard model impact, Overview Experimental techniques, beam nEDM measurements,
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Kseniia Svirina (Institut Laue-Langevin)31/08/2026, 11:10Oral Presentation
SuperSUN is a high-density source of Ultra Cold Neutrons (UCN) that feeds the PanEDM experiment, aiming to measure the neutron's permanent Electric Dipole Moment (EDM). The source delivers an exceptionally low-energy UCN spectrum, which promises long observation times but also requires developing new UCN handling techniques.
SuperSUN is based on conversion of cold neutrons in superfluid...
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Jake Johnson (PSI)31/08/2026, 11:50Oral Presentation
The n2edm experiment, hosted at the PSI ultracold neutron (UCN) source, aims to measure the permanent neutron electric dipole moment, $d_n$, with a precision of at least $10^{-27}$ $e$ cm to probe charge conjugation and parity (CP) violation in beyond standard model physics [1]. It has evolved from the previous nedm experiment that took data at PSI from 2015 to 2017, resulting in the current...
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Peter Matthias Stoffer (PSI - Paul Scherrer Institut)31/08/2026, 14:30Oral Presentation
A dynamical explanation of the baryon asymmetry of the universe requires new sources of CP violation. Under the assumption that these are tied to heavy particles beyond the Standard Model, an effective field theory framework can be used to describe their effect on low-energy precision observables, such as electric dipole moments. I will review the challenges and recent progress to establish...
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Kent Leung (Montclair State University)31/08/2026, 15:10Oral Presentation
The path to an “ultimate” nEDM apparatus is small measurement cells for suppressing systematic effects to a manageable level while achieving a sufficiently high ultracold neutron (UCN) density to improve statistical reach. The nEDM Superfluid technique offers this by exploiting a fortuitous combination of the properties of superfluid $^4$He, polarized $^3$He, and polarized UCN, allowing high...
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Lea Segner31/08/2026, 16:20Oral Presentation
The dominant systematic in the n2EDM experiment is the false EDM effect. Magnetic field inhomogeneities in the presence of an electric field generate an electric-field correlated shift in the measured frequencies, effectively mimicking a "false" electric dipole. To correct for this effect, a dedicated array of optically pumped Cesium vapor magnetometers is used to perform online measurements...
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Wolfgang Klassen (University of British Columbia)31/08/2026, 16:45Oral Presentation
The TUCAN collaboration aims to provide a world-class measurement of the neutron EDM, with an eventual precision goal of $1\times10^{-27}\ e\cdot$cm. In order to achieve this target sensitivity the magnetic environment in the experimental region must be very carefully controlled and monitored. To this end TUCAN has developed a suite of Cs based optically pumped magnetometers with the primary...
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Sean Vanbergen31/08/2026, 17:10Oral Presentation
The TRIUMF Ultracold Advanced Neutron (TUCAN) source produced UCNs for the first time in 2025. As part of the characterization of this new UCN source, we installed a prototype storage cell for the TUCAN EDM experiment with a guide geometry similar to that expected in a real experiment. We measured the filling, storage, and emptying of UCNs with this cell, optimizing the timing sequence to...
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Christopher Crawford (University of Kentucky)31/08/2026, 17:35Oral Presentation
Interpolation is necessary for simulating dynamics in measured magnetic field maps and can increase efficiency and/or accuracy with computed fields, example, finite element calculations. Harmonic expansion has the benefit of constraining the curl and divergence, but work best in a compact volume far from sources. An adaptation of this expansion is better suited for irregular volumes while...
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