Induction Magnetometers Principle, Modeling and Ways of Improvement

Coillot, Christophe; Leroy, Philippe

doi:10.5772/38945

Cited by 33 publications

(21 citation statements)

References 23 publications

(33 reference statements)

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“…2. Explicit values of the resistance, the inductance and the capacitance can be found in Coillot and Leroy (2012). Note that in case of a multi layer winding the capacitance between layers will be preponderant compared with the capacitance between each coil.…”

Section: Electrical Modeling Of the Induction Sensormentioning

confidence: 99%

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The Search-Coil Magnetometer for MMS

et al. 2014

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The tri-axial search-coil magnetometer (SCM) belongs to the FIELDS instrumentation suite on the Magnetospheric Multiscale (MMS) mission (Torbert et al. in Space Sci. Rev. (2014), this issue). It provides the three magnetic components of the waves from 1 Hz to 6 kHz in particular in the key regions of the Earth's magnetosphere namely the subsolar region and the magnetotail. Magnetospheric plasmas being collisionless, such a measurement is crucial as the electromagnetic waves are thought to provide a way to ensure the conver-

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Section: Electrical Modeling Of the Induction Sensormentioning

confidence: 99%

“…The total SCM output noise depends on the different noise source contributions in the full frequency range (Coillot and Leroy 2012). At low frequency (i.e.…”

Section: Appendix B: Internal Scm Noise Sourcesmentioning

confidence: 99%

The Search-Coil Magnetometer for MMS

et al. 2014

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“…The previous formula is different from the one presented in Coillot and Leroy (2012), which is only valid for rods with square sections (despite what is claimed in the article).…”

Section: Description Of the Sensor Configurationmentioning

confidence: 62%

“…The sensitivity benefit is related to an increase in the apparent permeability. Our current goal is to confirm the behaviour of this original induction sensor configuration, briefly presented in Coillot and Leroy (2012), through experimental measurements with a prototype and the validation of the apparent permeability equation with the aim of comparison to classical induction sensors.…”

Section: Description Of the Sensor Configurationmentioning

confidence: 99%

New ferromagnetic core shapes for induction sensors

Coillot

Moutoussamy

Boda

et al. 2014

J. Sens. Sens. Syst.

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Abstract. Induction sensors are used in a wide range of scientific and industrial applications. One way to improve these is rigorous modelling of the sensor combined with a low voltage and current input noise preamplifier aiming to optimize the whole induction magnetometer. In this paper, we explore another way, which consists in the use of original ferromagnetic core shapes of induction sensors, which bring substantial improvements. These new configurations are the cubic, orthogonal and coiled-core induction sensors. For each of them we give modelling elements and discuss their benefits and drawbacks with respect to a given noise-equivalent magnetic induction goal. Our discussion is supported by experimental results for the cubic and orthogonal configurations, while the coiled-core configuration remains open to experimental validation. The transposition of these induction sensor configurations to other magnetic sensors (fluxgate and giant magneto-impedance) is an exciting prospect of this work.

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“…In the context of this work we designed an ASIC low noise preamplifier (called MAGIC2) which offers especially low noise parameters which make possible the investigation of the noise source of the induction magnetometer. This work aims to extend the induction magnetometer modelling presented in Coillot and Leroy (2012) by introducing the noise source arising from the ferromagnetic core based on physical modelling of the complex permeability. Usually this noise source, which is frequency dependent, can be hidden by other dominating noise sources (especially the equivalent input current noise from the preamplifier).…”

Section: Introductionmentioning

confidence: 99%

Magnetic noise contribution of the ferromagnetic core of induction magnetometers

Coillot

Moussalim

Brun

et al. 2015

J. Sens. Sens. Syst.

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Abstract. The performance of induction magnetometers, in terms of resolution, depends both on the induction sensor and the electronic circuit. To investigate accurately the sensor noise sources, an induction sensor, made of a ferrite ferromagnetic core, is combined with a dedicated low voltage and current noise preamplifier, designed in CMOS 0.35 µm technology. A modelling of the contribution of the ferromagnetic core to the noise through the complex permeability formalism is performed. Its comparison with experimental measurements highlight another possible source for the dominating noise near the resonance.

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Induction Magnetometers Principle, Modeling and Ways of Improvement

Cited by 33 publications

References 23 publications

The Search-Coil Magnetometer for MMS

The Search-Coil Magnetometer for MMS

New ferromagnetic core shapes for induction sensors

Magnetic noise contribution of the ferromagnetic core of induction magnetometers

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