Magnetometry using Ramsey interferometry in a Yb atomic beam

Rathod, Ketan D and Natarajan, Vasant (2015) Magnetometry using Ramsey interferometry in a Yb atomic beam. In: CURRENT SCIENCE, 109 (3). pp. 592-595.

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Abstract

We use the Ramsey separated oscillatory fields technique in a 400 degrees C thermal beam of ytterbium (Yb) atoms to measure the Larmor precession frequency (and hence the magnetic field) with high precision. For the experiment, we use the strongly allowed S-1(0) P-1(1) transition at 399 nm, and choose the odd isotope Yb-171 with nuclear spin I = 1/2, so that the ground state has only two magnetic sublevels m(F) = +/- 1/2. With a magnetic field of 22.2 G and a separation of about 400 mm between the oscillatory fields, the central Ramsey fringe is at 16.64 kHz and has a width of 350 Hz. The technique can be readily adapted to a cold atomic beam, which is expected to give more than an order-of-magnitude improvement in precision. The signal-to-noise ratio is comparable to other techniques of magnetometry; therefore it should be useful for all kinds of precision measurements such as searching for a permanent electric dipole moment in atoms.

Item Type:	Journal Article
Publication:	CURRENT SCIENCE
Publisher:	INDIAN ACAD SCIENCES
Additional Information:	Copy right for this article belongs to the INDIAN ACAD SCIENCES, C V RAMAN AVENUE, SADASHIVANAGAR, P B #8005, BANGALORE 560 080, INDIA
Keywords:	Magnetometry; oscillatory fields; precession frequency; ytterbium atoms
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	03 Sep 2015 05:08
Last Modified:	03 Sep 2015 05:08
URI:	http://eprints.iisc.ac.in/id/eprint/52281

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