Griffith, W.
, Jimenez, R.
, Shah, V.
, Knappe, S.
and Kitching, J.
(2009),
Miniature atomic magnetometer integrated with flux concentrators, Applied Physics Letters, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=842515
(Accessed April 23, 2024)
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Miniature atomic magnetometer integrated with flux concentrators
Published
Author(s)
, , Vishal Shah, ,
Abstract
A major limitation on the sensitivity of alkali atomic magnetometers, spin-exchange relaxation, can be completely eliminated by operating at low magnetic field and high alkali density. This allows the miniaturization of atomic magnetometers while retaining exceptional sensitivity. We have previously demonstrated a spin exchange relaxation free magnetometer using a millimeter scale vapor cell that achieved magnetic field sensitivity of 70 fT/Hz1/2. The addition of magnetic flux concentrators around the vapor cell is used to further enhance the magnetic field sensitivity. Although limited at low frequencies by magnetic noise in the concentrator material, for frequencies above 100 Hz we reach a sensitivity of 15 fT/Hz1/2.Citation
Applied Physics Letters
Volume
94
Pub Type
Journals
Download Paper
Keywords
atomic magnetometer, magnetic flux concentrators, optical pumping, SERF
Citation
Created January 14, 2009, Updated February 19, 2017