DIRECTIONAL MAGNETOMETER WITH RESONANCE.

摘要

P It is intended to measure a magnetic field H1ex which is the projection, on a determined direction, of a Hex field and includes a sample (2) containing resonant spins, first means (4) to excite the resonance and detect this, second means (32) for generating a polarization field Hb in the direction and compensate H1ex, processing means (6, 8, 16 to 20, 34 to 38, 48 to 52) connected to the first means and making it possible to obtain voltages proportional to Hb-Ho + H1ex and to Ho-Hb + H1ex in the vicinity of the resonance, Ho being the value of the field at resonance, with Ho much greater than Hex, and a pulsed current in slots for inducing Hb, and servo means (40, 44) connected to the processing means and to the second means for compensating H1ex and providing a voltage proportional to H1ex. /P