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Intelligent Sensor Networks: Coupled Core Fluxgate Magnetometers, a New Device Configuration
Here we investigate an extension to work that has been performed on a nonlinear device known as a sensor. This devices is the Coupled Core Fluxgate Magnetometer, or CCFM. This device, and others classifiable as sensors are modeled as possesing a bistable potential. Additionally, they possess a specific characteristic: in the presence of an external signal (to be detected) the signal, or evolution of the system, will spend a greater, disproportionate, amount of time in one well compared the time spent in the other well. This allows the use of a time-domain detection scheme known as Residence Time Detection. With Residence Time Detection the external signal is quantified by either the absolute difference in time that the evolution spends in one well versus the other, or by the magnitude of the maximal ratio of the times spent in the two wells. We present, in
 
what follows, a deterministic analysis of this characteristic, as well as of the dynamics, of a new arrangement of the devices. This new arrangement cam from what one may call an experimental mishap and has lead to a scalably large increase in the sensitivity of the CCFM under the new arrangement.
     
     
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