Abstract :
Search-coil magnetometers are still often used in space physics thanks to their ability to measure weak magnetic field (few tens of fT/sqrt(Hz) at kHz) and also their robustness. However, their frequency band is limited by the resonance of the coil. A second coil, used to extend the frequency band, is almost inefficient after the resonance of the first coil. We present a solution, called "mutual reducer", to make it able to extend frequency band. The physical principle is described. The "dual-band" magnetic sensor so-designed will be on board, for the first time, on Bepicolombo mission which aims to investigate Mercury\´s magnetosphere.
Keywords :
magnetic field measurement; magnetic sensors; magnetometers; Bepicolombo mission; dual-band magnetic sensor; dual-band search coil magnetometer; magnetic fields fluctuation; mutual reducer; space physics; weak magnetic field measurement; Coils; Dual band; Extraterrestrial measurements; Fluctuations; Frequency; Instruments; Magnetic field measurement; Magnetic fields; Magnetic resonance; Magnetometers;
