Development of the measurement system for the search of an electric dipole moment of the electron with laser-cooled francium atoms

T. Inoue, S. Ando, T. Aoki, H. Arikawa, S. Ezure, K. Harada, T. Hayamizu, T. Ishikawa, M. Itoh, K. Kato, T. Kato, H. Kawamura, H. S. Nataraj, T. Sato, A. Uchiyama, T. Aoki, T. Furukawa, A. Hatakeyama, K. Hatanaka, K. ImaiT. Murakami, Y. Shimizu, T. Wakasa, H. P. Yoshida, Y. Sakemi

Research output: Contribution to journalConference article

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.

Original languageEnglish
Article number05008
JournalEPJ Web of Conferences
Volume66
DOIs
Publication statusPublished - Apr 14 2014
Event2013 International Nuclear Physics Conference, INPC 2013 - Firenze, Italy
Duration: Jun 2 2013Jun 7 2013

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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    Inoue, T., Ando, S., Aoki, T., Arikawa, H., Ezure, S., Harada, K., Hayamizu, T., Ishikawa, T., Itoh, M., Kato, K., Kato, T., Kawamura, H., Nataraj, H. S., Sato, T., Uchiyama, A., Aoki, T., Furukawa, T., Hatakeyama, A., Hatanaka, K., ... Sakemi, Y. (2014). Development of the measurement system for the search of an electric dipole moment of the electron with laser-cooled francium atoms. EPJ Web of Conferences, 66, [05008]. https://doi.org/10.1051/epjconf/20146605008