Oct 16 – 20, 2016
Europe/Zurich timezone

Development of a dual isotope rubidium co-magnetometer toward electron EDM search using laser-cooled francium

Oct 18, 2016, 5:57 PM


Ms Aiko Uchiyama (Tohoku University)


The permanent electric dipole moment (EDM) of an elementary particle is a good candidate to search for the physics beyond the standard model. Francium (Fr) is a radioactive heavy alkali metal and has a large enhancement factor of the electron EDM. The atomic EDM is measured by comparing the difference in the atomic resonance frequency in an external electric field parallel and anti-parallel to the applied magnetic field. Laser cooling and trapping technique has advantages over atomic beam experiment and can suppress systematic errors. At Cyclotron and Radioisotope Center (CYRIC), Tohoku University, an experimental search for the electron EDM using laser cooled and trapped francium atoms is in progress. In the experiment, the produced francium atoms will be first trapped in a magneto-optical trap (MOT) and transferred to an optical dipole force trap where the EDM measurement will be performed. For the sensitive EDM search, measurements of the applied magnetic field and the light shifts are required. Rubidium (Rb) has two stable, abundant isotopes. We plan to use cold Rb atoms as a co-magnetometer. The dual Rb isotope co-magnetometer can measure the magnetic field and the light shift simultaneously. This requires a dual isotope Rb MOT. For this, light sources and experimental setup for the dual isotope Rb MOT are being developed. In this presentation, the progress of the development is presented.

Primary author

Ms Aiko Uchiyama (Tohoku University)


Dr Hirokazu Kawamura (Tohoku University) Dr Kazuo Tanaka (Tohoku University) Dr Ken-ichi Harada (Tohoku University) Mr Kosuke Sakamoto (Tohoku University) Prof. Masatoshi Itoh (Tohoku University) Ms Risa Yoshioka (Tohoku University) Ms Saki Ito (Tohoku University) Dr Takeshi Inoue (Tohoku University) Dr Umakanth Dammalapati (Tohoku University) Prof. Yasuhiro Sakemi (University of Tokyo)

Presentation materials