Project Details
Projekt
Magnetometry at the fTesla-scale for neutron EDM experiments
Applicant
Professor Dr. Werner Heil
Subject Area
Optics, Quantum Optics and Physics of Atoms, Molecules and Plasmas
Nuclear and Elementary Particle Physics, Quantum Mechanics, Relativity, Fields
Nuclear and Elementary Particle Physics, Quantum Mechanics, Relativity, Fields
Term
from 2013 to 2016
Project identifier
Deutsche Forschungsgemeinschaft (DFG) - Project number 237163913
Novel neutron EDM experiments, like the international neutron EDM collaboration at the Paul Scherrer Institute (PSI) or the nEDM collaboration at FRM-II aim to reach a measurement sensitivity of ≈10-28 e∙cm, a two orders of magnitude improvement compared to the present upper limit of dn< 3x10-26 e∙cm for the neutron EDM. In order to reach this ambitious goal, magnetometry reaching the fTesla sensitivity level during a typical Ramsey cycle of 200 s is demanded. In this proposal we concentrate on the commissioning and operation of an existing 3He magnetometer which is based on the detection of free spin-precession of gaseous, nuclear polarized 3He samples and which should be able to monitor magnetic field fluctuations at the fT-level and to correct geometric phase induced false nEDM effects. These false effects set the present systematic limit of dn, false ≈10-26 ecm and result from the interplay of the relativistic xE-field with existing magnetic field gradients causing a frequency shift linear to the electric field mimicking an nEDM.
DFG Programme
Priority Programmes
