CML B-SENSORS (Ground Plane)
(Radiation Hardened)

The CML (Cylindrical Moebius Loop) B-dot sensors (Models 3, 5, and 6) are small radiation hardened half cylinder loops mounted on conducting ground plates for positioning on a ground plane to measure the time rate-of-change of an incident magnetic field in a gamma radiation environment. These sensors can also be used for surface current density measurements. These probes are passive devices requiring no external power.

These sensors are cylindrical loops with one gap and the pickoff cables wired in a moebius configuration. The voltage signal developed across the gap by the changing magnetic field is sensed in the differential mode by the pickoff cables. The moebius configuration and the differential output provide for common mode rejection of unwanted signals generated in the cables by the gamma radiation and electric field components. The output cables of all CML sensors exit through the ground plane (radial version), normal to the cylinder axis.

The X-versions of these sensors have the sensing loop structure formed from a sparse wire grid. This maximizes the transparency of the sensor to X-rays and photoelectrons.

PERTINENT EQUATION

	Vo = = sensor output (in volts)
where
	= sensor equivalent area (in m2)
	= magnetic flux density vector (in teslas)

Data Specification Sheet