期刊
出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nima.2018.04.025
关键词
Zeeman effect; Atomic spectroscopy; Mercury; Electric dipole moment; Neutron
类别
资金
- Swiss National Science Foundation (SNSF) [126562, 144473, 149211, 157079, 162574, 172639]
- French Agence Nationale de la Recherche (ANR) [ANR-09-BLAN-0046, ANR-14-CE33-0007]
- National Science Centre, Poland [2015/18/M/ST2/00056]
- Agence Nationale de la Recherche (ANR) [ANR-09-BLAN-0046] Funding Source: Agence Nationale de la Recherche (ANR)
We report on a laser based Hg-199 co-magnetometer deployed in an experiment searching for a permanent electric dipole moment of the neutron. We demonstrate a more than five times increased signal to-noise-ratio in a direct comparison measurement with its Hg-204 discharge bulb-based predecessor. An improved data model for the extraction of important system parameters such as the degrees of absorption and polarization is derived. Laser-and lamp-based data-sets can be consistently described by the improved model which permits to compare measurements using the two different light sources and to explain the increase in magnetometer performance. The laser-based magnetometer satisfies the magnetic field sensitivity requirements for the next generation nEDM experiments.
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