MGL B-Dot SENSOR (Ground Plane)

The MGL (Multi-Gap Loop) ground plane B-dot sensors (Models 3, 4, 5, 7 and 8) are half cylinder loops mounted on conducting ground plates for positioning on a ground plane to measure the time rate-of-change of incident magnetic fields.  These sensors can also be used for surface current density measurements.  (Data Sheet 1107 describes J-dot sensors designed especially for skin current measurements.)  These sensors are passive devices; they require no external power.  Gas fittings allow pressurization to eliminate arcing in intense fields and weather problems.  They have been used extensively in EMP simulation programs.

The half cylinder sensors have two symmetrically located gaps which are combined by a series-parallel wiring arrangement to drive the coaxial output connector.  The output connector can exit either along the cylinder axis (axial version) or along a radius (radial version) as shown above.


PERTINENT EQUATION

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

Data Specification Sheet