scholarly journals New aspects on the performance of a fundamental mode orthogonal fluxgate magnetometer based on amorphous wire cores

AIP Advances ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 015113
Author(s):  
M. Tibu ◽  
S. Corodeanu ◽  
C. Hlenschi ◽  
H. Chiriac ◽  
N. Lupu
Keyword(s):  
Fundamental Mode ◽  
Amorphous Wire ◽  
Fluxgate Magnetometer

Search for Martian Schumann Resonances

2020 ◽  
Author(s):  
Yanan Yu ◽  
Christopher Russell ◽  
Peter Chi ◽  
Syed Haider ◽  
Jayesh Pabari ◽  
...  
Keyword(s):  
Fundamental Mode ◽  
Electromagnetic Waves ◽  
Lightning Discharge ◽  
Sampling Rate ◽  
Dust Storms ◽  
Dust Particles ◽  
Fluxgate Magnetometer ◽  
Electric Discharges ◽  
Schumann Resonance ◽  
Schumann Resonances

<p>On Earth, electric discharges in thunderstorms produce ELF waves in the Earth-ionosphere waveguide that circles the globe. These waves give rise to Schumann resonances in the waveguide resonant cavity. These waves are also expected to occur at Venus, produced by strong lightning in the Venus atmosphere and at Mars produced by active dust devils or dust storms, during southern hemisphere summer, when the planet is near periapsis. Within dust storms, dust particles undergo triboelectric charging. The charge transfer leads to charge separation. A lightning discharge is expected to occur when the charge exceeds the breakdown strength of the media present. The transient electric discharge emits electromagnetic waves in the VLF/ELF range of frequency, leading to Schumann Resonance in the surface-ionospheric cavity. In a heterogeneous cavity, Schumann resonance modes are observable using an in-situ instrument. Recently has it been possible to search for these electromagnetic waves from the Mars surface using the UCLA-provided InSight fluxgate magnetometer. The weakness of the vertical component of ULF waves at Mars suggests that the subsurface is electrically conducting, allowing trapping of electromagnetic energy between the sub-surface and the ionosphere. The fundamental mode of Schumann resonance carries higher energy compared to there are more chances of observing the fundamental mode. Various values of the first mode are predicted in the literature for Mars like 13-14 Hz or between 9-14 Hz and 17.5 Hz. Even if the fundamental mode is above 10 Hz, the 20 Hz sampling rate will allow detection of an aliased signal. We examine the data obtained during Martian sandstorms for the possible existence of such waves. A large dust storm was detected on Mars beginning on InSight sols 40 to 50, and ending during sols 50 to 90. Examining the 20 Hz InSight magnetometer data during this period reveals no clearly identifiable Schumann Resonance signals within the bandwidth of the magnetometer.</p>

A Low-Noise Fundamental-Mode Orthogonal Fluxgate Magnetometer

2014 ◽  
Vol 50 (5) ◽  
pp. 1-3 ◽  
Author(s):  
Robert Bazinet ◽  
Alfredo Jacas ◽  
Giovanni A. Badini Confalonieri ◽  
Manuel Vazquez
Keyword(s):  
Fundamental Mode ◽  
Low Noise ◽  
Fluxgate Magnetometer

Fundamental Mode Orthogonal Fluxgate Magnetometer Applicable for Measurements of DC and Low-Frequency Magnetic Fields

2018 ◽  
Vol 18 (7) ◽  
pp. 2705-2712 ◽  
Author(s):  
Naofumi Murata ◽  
Hikaru Karo ◽  
Ichiro Sasada ◽  
Takafumi Shimizu
Keyword(s):  
Magnetic Fields ◽  
Fundamental Mode ◽  
Low Frequency ◽  
Fluxgate Magnetometer

A new method of fluxgate signal extraction

2017 ◽  
Vol 2017 (45) ◽  
pp. 83-89
Author(s):  
A.A. Marusenkov ◽  
Keyword(s):  
High Frequency ◽  
Second Harmonic ◽  
Excitation Frequency ◽  
Low Noise ◽  
Measuring System ◽  
Signal Extraction ◽  
Fluxgate Magnetometer ◽  
New Approach ◽  
Average Value ◽  
The Time Domain

Using dedicated high-frequency measuring system the distribution of the Barkhausen jumps intensity along a reversal magnetization cycle was investigated for low noise fluxgate sensors of various core shapes. It is shown that Barkhausen (reversal magnetization) noise intensity is strongly inhomogeneous during an excitation cycle. In the traditional second harmonic fluxgate magnetometers the signals are extracted in the frequency domain, as a result, some average value of reversal magnetization noises is contributed to the output signals. In order to fit better the noise shape and minimize its transfer to the magnetometer output the new approach for demodulating signals of these sensors is proposed. The new demodulating method is based on information extraction in the time domain taking into account the statistical properties of cyclic reversal magnetization noises. This approach yields considerable reduction of the fluxgate magnetometer noise in comparison with demodulation of the signal filtered at the second harmonic of the excitation frequency.

Sign in / Sign up

Export Citation Format

Share Document