The Method for Measuring the Non-Orthogonal Angle of the Magnetic Field Coils of a K-Rb-21Ne Co-Magnetometer

The Method for Measuring the Non-Orthogonal Angle of the Magnetic Field Coils of a K-Rb-21Ne Co-Magnetometer

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The sensitivity of a dual-axis K-Rb-21Ne co-magnetometer is subject to the accuracy of the magnetic field compensation and the calibration coefficient, which are determined by Medical and Ambulatory supplies / Diagnostic Instruments and Supplies the orthogonality of the coil system.In this paper, an ingenious method of measuring the non-orthogonal angles between the x- and z-axes coils and that between the y- and z-axes coils is demonstrated.This in situ measurement method is based on the magnetic field responses of the dual-axis co-magnetometer.The non-orthogonal angle can be obtained by solving the relevant trigonometric function of the geometric relationship.Finally, the nonorthogonal angles of about Accessories 7.

93° between the z- and y-axes coils and 7.39° between the z- and x-axes coils are obtained by fitting the response formulas.Besides, the influence of the applied transverse magnetic field on the accuracy of the non-orthogonal angle calibration is analyzed.This method is also verified to be valid at different working temperatures.