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| Titel |
Magnetometers for geoscience |
| VerfasserIn |
V. Korepanov, A. Marusenkov |
| Konferenz |
EGU General Assembly 2009
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 11 (2009) |
| Datensatznummer |
250027732
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| Zusammenfassung |
| Magnetometers for the Earth’s magnetic field measurements were probably the first
metrological action of the humankind. The progress in recent 20-30 years in the different
kinds of magnetometers development is very impressive and now practically all scale of the
magnetic field values can be measured – from huge magnetic fields of astronomical objects
till atto-Tesla levels. A table with dynamic ranges of main magnetometers types is presented.
From this table it follows that the most perspective model for the measurement of the
magnetic field in the range applicable for geophysics is flux-gate magnetometer (FGM).
Really, modern FGM may cover unprecedented dynamic range of the magnetic field changes
– from 10-4till 10-12T and even lower and its second from the most important
parameters – zero line drift – may reach below 10-4from the full measurement scale per
year.
Surely, the creation of so high class FGMs needs a deep research in many different areas:
metrology, electronics and material science to name a few.
The present report deals with the peculiarities of the development of FGMs with record
parameters as to noise level and power consumption for different applications. Also a very
peculiar question of permanent monitoring of Earth’s magnetic field with temporal
resolution of 1 second (now- 1 minute) is analyzed and the corresponding solution is
proposed.
In the conclusion, the best available for today FGM parameters are discussed. |
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