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Development of the Measurement System for the Search of an Electric Dipole Moment of the Electron with Laser-Cooled Francium Atoms
- Source :
- EPJ Web of Conferences, Vol 66, p 05008 (2014)
- Publication Year :
- 2014
- Publisher :
- EDP Sciences, 2014.
-
Abstract
- We plan to measure the permanent electric dipole moment (EDM) of the electron, which has the sensitivity to the CP violation in theories beyond the standard model by using the laser-cooled francium (Fr) atom. This paper reports the present status of the EDM measurement system. A high voltage application system was constructed in order to produce the strong electric field (100 kV/cm) needed for the experiment. After conditioning, the leakage current was 10 pA when a high voltage of 43 kV was applied. Also, a drift of an environmental field was measured at the planned location of the Fr-EDM experiment. The drift is suppressed at present down to the level of 10 pT by installing a 4-layermagnetic shield. Improvements are still needed to reach the required field stability of 1 fT.
Details
- Language :
- English
- ISSN :
- 2100014X
- Volume :
- 66
- Database :
- Directory of Open Access Journals
- Journal :
- EPJ Web of Conferences
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.630b4404355049fd9b97c3e1f112e14b
- Document Type :
- article
- Full Text :
- https://doi.org/10.1051/epjconf/20146605008