The PanEDM neutron electric dipole moment experiment at the ILL

Autor: Christopher Klau, Joachim Meichelböck, Mark Tucker, Michael Kreuz, Robert Paddock, T. Lins, Skyler Degenkolb, Jaideep Singh, Tim Chupp, Maurits van der Grinten, Martin Rosner, S. N. Ivanov, Peter Fierlinger, Oliver Zimmer, Eddy Lelièvre-Berna, Katharina Fierlinger, David Wurm, S. Stuiber, Hanno Filter, R. Stoepler, Michael Sturm, A. P. Serebrov, Florian Röhrer, B. Taubenheim, Douglas H Beck, Thomas Neulinger, Xavier Tonon
Přispěvatelé: Institut Laue-Langevin (ILL), ILL
Rok vydání: 2019
Předmět:
Physics - Instrumentation and Detectors
Neutron electric dipole moment
QC1-999
FOS: Physical sciences
[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
7. Clean energy
01 natural sciences
High Energy Physics - Experiment
High Energy Physics - Experiment (hep-ex)
0103 physical sciences
[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]
Neutron
[PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det]
Nuclear Experiment (nucl-ex)
010306 general physics
Nuclear Experiment
activity report
spin: precession
Physics
n: electric moment
010308 nuclear & particles physics
shielding: magnetic
n: particle source
Instrumentation and Detectors (physics.ins-det)
stability
Magnetic field
Computational physics
Electric dipole moment
experimental equipment
Electromagnetic coil
Electromagnetic shielding
Ultracold neutrons
upgrade
Nucleon
Zdroj: 'EPJ Web of Conferences ', vol: 219, pages: 02006-1-02006-7 (2019)
EPJ Web Conf.
International Workshop on Particle Physics at Neutron Sources 2018
International Workshop on Particle Physics at Neutron Sources 2018, May 2018, Grenoble, France. pp.02006, ⟨10.1051/epjconf/201921902006⟩
EPJ Web of Conferences, Vol 219, p 02006 (2019)
ISSN: 2100-014X
DOI: 10.1051/epjconf/201921902006
Popis: The neutron's permanent electric dipole moment $d_n$ is constrained to below $3\times10^{-26} e~\text{cm}$ (90% C.L.) [ arXiv:hep-ex/0602020, arXiv:1509.04411 ], by experiments using ultracold neutrons (UCN). We plan to improve this limit by an order of magnitude or more with PanEDM, the first experiment exploiting the ILL's new UCN source SuperSUN. SuperSUN is expected to provide a high density of UCN with energies below 80 neV, implying extended statistical reach with respect to existing sources, for experiments that rely on long storage or spin-precession times. Systematic errors in PanEDM are strongly suppressed by passive magnetic shielding, with magnetic field and gradient drifts at the single fT level. A holding-field homogeneity on the order of $10^{-4}$ is achieved in low residual fields, via a high static damping factor and built-in coil system. No comagnetometer is needed for the first order-of-magnitude improvement in $d_n$, thanks to high magnetic stability and an assortment of sensors outside the UCN storage volumes. PanEDM will be commissioned and upgraded in parallel with SuperSUN, to take full advantage of the source's output in each phase. Commissioning is ongoing in 2019, and a new limit in the mid $10^{-27} e~\text{cm}$ range should be possible with two full reactor cycles of data in the commissioned apparatus.
8 pages, 4 figures; submitted to the Proceedings of the International Workshop on Particle Physics at Neutron Sources PPNS 2018, Grenoble, France, May 24-26, 2018
Databáze: OpenAIRE
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