SMuK 2023 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 15: Instrumentation VI
HK 15.6: Vortrag
Dienstag, 21. März 2023, 18:15–18:30, SCH/A117
n2EDM - production and coating of ultra-cold neutron storage vessel — •Noah Yazdandoost — Department of Chemistry, Johannes Gutenberg-University, Mainz
A non-zero nEDM would break time and parity reversal symmetry and if large enough could explain observations like the matter-antimatter asymmetry of the universe. The standard model of particle physics predicts a neutron electric dipole moment (nEDM) on the order of (10−29-10−34) e·cm. To probe the standard model of particle physics and constrain the parameter space for other theories, a more precise measurement of the nEDM is needed (current upper limit 1.8·10−26 e·cm). The aim of the n2EDM experiment is to measure or exclude an nEDM on the order of 10−27 e·cm.
In the n2EDM experiment polarized ultra cold neutrons (UCNs) are stored in a vessel across which a combination of a constant electric and magnetic field is applied along the cylinder axis. The vessel consist of the high voltage and ground electrodes and the insulating ring. The Larmor precession frequency of the neutrons is measured by the Ramsey method of separated oscillatory fields. If a shift in the Larmor precession frequency between parallel and antiparallel field orientation is measured, the nEDM is non-zero. To ensure long storage and long depolarization times of the UCNs which directly influence the sensitivity of the experiment, a special coating of the storage vessel is needed.
This talk gives an overview of the n2EDM experiment and the production and coating process of the insulating rings of the experiment.