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Broad-band magnetic induction probe calibration using a frequency-corrected reference probe
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View: Figures


Image of FIG. 1.
FIG. 1.

Magnetic induction probe schematic, including the termination impedance Z for measuring the probe voltage V.

Image of FIG. 2.
FIG. 2.

Magnetic induction probe circuit equivalent with shielded-twisted pair cabling, including the pickup loop impedance Z, transmission line impedance Z, termination impedance Z, and high-voltage (or plasma) coupling C.

Image of FIG. 3.
FIG. 3.

Lumped element equivalent circuit for no capacitive coupling between twisted pairs of the circuit in Figure 2 .

Image of FIG. 4.
FIG. 4.

Photographs of the pickup loops for the (a) target probe and (b) calibration reference probe.

Image of FIG. 5.
FIG. 5.

R-X data for the target probe and calibration probe from 1 kHz to 500 kHz.

Image of FIG. 6.
FIG. 6.

Probe voltages for the calibration probe and target probe, measured in the same magnetic field. The boxes in the figure represent time intervals over which the calibration calculations were completed.

Image of FIG. 7.
FIG. 7.

Gain and phase of the sensitivity for the calibration probe with high voltage coupling to the coil with V = 1000 V and V = 700 mV. Markers indicate SPICE predictions.

Image of FIG. 8.
FIG. 8.

Magnetic field measurements, after frequency correction and integration for both probes.


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Scitation: Broad-band magnetic induction probe calibration using a frequency-corrected reference probe