High-sensitivity inductive magnetometer for pulsed magnetic fields

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Abstract
A magnetometer is described for measurements in pulsed magnetic fields up to 43 T. The compensation system allows removal of pickups produced both by the longitudinal and transverse components of the pulsed field. The compensation level achieves 10 −6 (of the signal from the working coil with an inner diameter 1.4 or 1.75 mm) for the longitudinal and 10 −4 for the transverse components. Sensitivity of the magnetometer is about 10 −4 emu for the fields up to 10 T and decreases down to 10 −3 emu at the pulse amplitude of 35 T. A deviation of the compensation is below 2×10 −4 for the temperature increase from 77 up to 300 K and below 5×10 −5 after the sample replacement. The sample temperature is controlled by a fast-acting temperature control system in the range from 6 up to 300 K with accuracy of 0.3–0.05 K.