FIELD: physics.
SUBSTANCE: polarisation of layers intercrossed by chink with constant magnetic field, smooth lockout of polarising field, making of additional dephasing constant magnetic field and observation of signal of the free precession in magnetic field of the Earth is performed, thus additional dephasing field is created using activity of one, or even quantity of pulsing constant magnetic fields, resultant which intensity wanes in radial direction proportionally the fifth and more distance degree, and signal observation spend after the termination of activity of the additional dephasing constant magnetic field.
EFFECT: increase of degree of signal inhibition from bore hole at minimal reduction of useful signal from layer.
2 cl, 9 dwg
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