TITLE:

NONLINEAR DYNAMICS DESIGN AND OPERATION OF ADVANCED MAGNETIC SENSORS (No. 57)

DATE:

Friday, October 22nd, 2004

TIME:

3:30 PM

LOCATION:

GMCS 214

SPEAKER:

Patrick Longhini, Computational Science Research Center, San Diego State University

ABSTRACT:

Magnetic senors are inherently nonlinear systems for detecting weak
magnetic dc and ac fields. One type of sensor is the fluxgate
magnetometer which consists of a ferromagnetic core wrapped by two
coils, an excitation (drive) coil and pickup (sensing) coil. Fluxgate
magnetometers are capable of measuring the strength of the magnetic
field to about $10^{-6}-100$ gauss. Currently, the most sensitive
field sensor is the Superconducting Quantum Interference Device
(SQUID), which can measure magnetic fields in the range of about
$10^{-10}-10^{-4}$ gauss. In principle, we can take advantage of
the nonlinear characteristics to improve system performance. In this
talk we describe two novel approaches to improve system performance
via nonlinear dynamics theory: a nove readout scheme and an array
configuration that combines multiple sensors into one single systems.
Results of numerical bifurcation analysis and experimental works will
be presented as well.

HOST:

Antonio Palacios

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