Magnetic field cancelling
Magnetic field cancelling systems provide an effective solution for dampening ambient magnetic fields, allowing high resolution performance of TEM, SEM and FEG SEM instruments. The system comprises of a magnetic field control unit, magnetic field sensor and three multicore cables. The cables are installed in the room on the X, Y and Z axes. The sensor measures the strength and phase of the field in real time. The signals are fed to the control unit where three power amplifiers drive anti-phase currents through the multicore cables to effectively nullify the field.