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A Portable Ultrasensitive SERF Atomic Magnetometer for Biomagnetic Measurements

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06.06.07 - Damop - SERF Magnetometer.ppt 2.433Mb application/vnd.ms-powerpoint View/Open
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dc.contributor.author Proite, Nicholas
dc.contributor.author Cook, Peter
dc.contributor.author Li, Zhimin
dc.contributor.author Wakai, Ronald T.
dc.contributor.author Walker, Thad G.
dc.contributor.author Wyllie, Robert
dc.date.accessioned 2009-09-10T14:55:54Z
dc.date.available 2009-09-10T14:55:54Z
dc.date.issued 2009-09-10T14:55:54Z
dc.identifier.uri http://digital.library.wisc.edu/1793/36464
dc.description.abstract We present a portable Rb cell atomic magnetometer suited for biomagnetic measurements. Working in the spin-exchange relaxation free regime, we demonstrate an initial white noise floor of 60 fT$/\sqrt {Hz} $. We show an adult magnetic cardiogram and demonstrate the feasibility of extending our measurements to fetal MCG. Based on previous experiments the noise floor can be further reduced by parametrically modulating the z-magnetic field, which also allows for the simultaneous measurement of the x and y field components using a single probe beam [1]. We will present the simple conversion of the magnetometer to a gradiometer that still uses a single probe beam. Finally, we discuss related technical advances over previous designs, including the replacement of bulky air convection heating apparatus by simple rf heating and an effective insulation material that allows 1 cm working distance from the subject at 180C temperature differential. [1] Z Li, R T Wakai, and T G Walker, Appl. Phys. Lett. 89, 134105 (2006) en
dc.description.provenance Submitted by Thad Walker (tgwalker@wisc.edu) on 2009-09-10T14:55:54Z No. of bitstreams: 1 06.06.07 - Damop - SERF Magnetometer.ppt: 2433024 bytes, checksum: c005d6cdf962c94160fdba50a2a72499 (MD5) en
dc.description.provenance Made available in DSpace on 2009-09-10T14:55:54Z (GMT). No. of bitstreams: 1 06.06.07 - Damop - SERF Magnetometer.ppt: 2433024 bytes, checksum: c005d6cdf962c94160fdba50a2a72499 (MD5) en
dc.subject Biomagnetometry en
dc.title A Portable Ultrasensitive SERF Atomic Magnetometer for Biomagnetic Measurements en
dc.type Presentation en

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