Precise magnetometers for geophysics and metrology
Type of document
habilitation thesishabilitační práce
Author
Janošek, Michal
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Show full item recordAbstract
This habilitation thesis is a commented collection of author’s post-doctoral publications
on the topic of improving the precision (and accuracy) of magnetometers in the geomagnetic
field range with their prospective use in geophysics and exploration, and their metrology.
The author focused on room-temperature magnetometers (parallel and orthogonal fluxgate)
and a high-temperature-superconductor quantum magnetometer (SQUID). The author’s
research is presented and organized in two fundamental branches: establishing and
improving magnetometer precision and accuracy, and its application and performance in
geophysical observations. The first topic is addressed by research in establishing and
improving magnetometer parameters, such as their (ultra-) low-frequency noise and offset,
and by researching magnetometer calibration methods which can compensate for the effects
of anthropogenous noise. The second topic deals with applications of such precise and
accurate, i.e. low-noise and well calibrated magnetometers in geophysics – the developed
orthogonal fluxgate magnetometer is shown to have a perspective of replacing search-coils
and even SQUIDs for geophysical exploration due to its noise below 1 pT/√Hz at 1 Hz.
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