# Physics of fundamental Symmetries and Interactions - PSI2019

Oct 20 – 25, 2019
PSI
Europe/Zurich timezone

## Considerations for a caesium magnetometer array for the n2EDM experiment

Oct 22, 2019, 5:58 PM
1m
WHGA/001 - Auditorium (PSI)

Poster

### Speaker

Mr Duarte Vicente Pais (Paul Scherrer Insitut, ETH Zürich)

### Description

The search for the neutron electric dipole moment $d_n$, carried on by the n2EDM experiment at PSI could provide a better insight on the baryon asymmetry of the universe and/or new physics. The experimental goal to reach an order of magnitude higher sensitivity than previous efforts, means its systematic effects need to be better controlled. The appearance of a false $d_n$ ($d_{Hg→n}^{false}$) due to the different motional magnetic fields seen by the neutrons and Hg atoms of the comagnetometer is one of such obstacles. A Cs-Magnetometer (CsM) array is then to be built such that Δ$d_{Hg→n}^{false}<4×10^{-28} e.cm$. Furthermore, the presence of magnetic impurities in the apparatus perturbs the performance of the CsM array. Calculations of this effect are shown, together with the impurity criteria that would preserve the normal functioning of the array.

### Primary author

Mr Duarte Vicente Pais (Paul Scherrer Insitut, ETH Zürich)