SHRIMP – A PRECISE MAGNETOMETER
Similary to what is done for Electron Paramagnetic Resonance (EPR) measurements, a material can be magnetized and excited to measure weak AC fields. By coupling it to a resonator, the radiofrequency magnetic field sensitivity can be greatly enhanced. The study of suitable materials and resonators will permit the development of a new class of magnetometers, with sensitivity below the fT/√Hz at room temperature.
The detection of ultra-low magnetic fields is a long standing technological challenge motivated by the many applications of magnetometers. The SHRIMP is a magnetometer which embodies the possibility of room temperature operation, high working frequency and ease of implementation, making it suitable for a number of applications. The sensitivity limit of this device results competitive or superior with present state-of-the-art magnetometers. The principle of operation is based on field modulation techniques usually exploited in electron spin resonance measurements. To increase the sensitivity, the magnetized material can be coupled to a resonator, like the mode of a microwave resonant cavity. Numerous realizations of this device can be studied depending on its application, which ranges from NMR signals detection to fundamental physics.
- Medical diagnostics, and in particular in NMRs;
- Scientific research, where the sensibility is necessary;
- Material science, to study magnetic properties.
- Geological exploration;
- Military field, to devise magnetic radars.
- Extreme sensitivity;
- Possibility of operation both at room temperature and at cryogenic temperature, without compromising the sensitivity;
- Compactness and structural solidity;
- Adaptability and variability depending on the selected application;
- Ease of use.