Field emitter magnetic sensor with steered focused electron beam

A novel field emission magnetic sensor is proposed and its operation is the oretically analyzed. The sensor comprises a dual-gate wedge field emitter w ith a split gate having the double role of focusing and steering the electr on beam. The electron beam deflection due to the Lorentz force is compensat ed by appropriate potentials applied to this electrode. The modeling result s have been obtained using the Simion 3D 7.0 software package. The device h as high sensitivity and its operation is not influenced by fluctuations in the emission current. Arrangements of mutually normal wedge emitters can be used for two-dimensional magnetic field sensing.