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INTERMAGNET Russian Segment Print
Written by Sapunov   
четверг, 24 февраля 2011

The international conference "Artificial Intelligence in the Earth’s Magnetic Field Study. INTERMAGNET Russian Segment" has been held on 26–28 January 2011 in Uglich, Yaroslavl region. You can see comprehensive information in The Quantum Magnetometry Laboratory took part with the report "Proton Overhauser magnetometers POS: experience of long-term operation and new options".

The QMLab of UrFU develops and serially makes the Overhauser geomagnetic field magnetometers which are based on the unique stable working substances, computer methods of calculation and sensors optimisation, digital-processing methods of proton precession signal. Our Overhauser magnetometers are used in ground, marine, borehole geological prospecting and the Processor Overhauser Sensor - magnetometer POS is particularly used on magnetic observatories including INTERMAGNET in Russia and abroad. The report presents operating experience, design and technical parameters of the OEM magnetometer POS which is able to provide the absolute error of measurements up to 0.1nT with sensitivity up to 0.01nT нТл Proved to be the required parameter for magnetic observatories, special digital processing firmware algorithm of the proton signal ensures control of each measurement error in the field's units (nT).

Observatories application experience has shown the necessity of new POS magnetometer options which are realized in practice and find an extending application, namely:

  • The POS-1GPS additionally provides up to 0.1 millisecond time synchronization of a proton signal starting by a PPS impulse of the internal GPS receiver. The format of the POS output data includes UTC time, coordinates and satellites status in real times.
  • SD card option is an internal or flowing block for reserve data saving on a SD card providing independence from an external registration system or a computer.
  • POLAR option of the POS is based upon working substance optimized to the range temperature up to – 60°C so that proton relaxation time in proton or Overhauser magnetometers are essentially decreased both by internal relaxation channel and oxygen solubility rise.

This report covers the results of the long-term research directed at developing the absolute vector proton magnetometer based on the switching of bias magnetic fields. The distinctive feature is the attempt of the installation of the miniature Overhauser sensor and optimised Garret solenoid directly on the telescope of the nonmagnetic theodolite.

Last Updated ( четверг, 30 апреля 2015 )
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