Details

Autor(en) / Beteiligte

• Rutkowski, J.
• Fourcault, W.
• Bertrand, F.
• Rossini, U.
• Getin, S.
• Lartigue, O.
• Le Calvez, S.
• Jager, T.
• Herth, E.
• Le Prado, M.
• Leger, J. M.
• Morales, S.

Titel

Towards a miniature atomic scalar magnetometer using liquid crystal polarization rotator

Ist Teil von

• 2013 Transducers & Eurosensors XXVII: The 17th International Conference on Solid-State Sensors, Actuators and Microsystems (TRANSDUCERS & EUROSENSORS XXVII), 2013, p.705-708

Ort / Verlag

IEEE

Erscheinungsjahr

2013

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• CEA-LETI and CNES have successfully realized a helium-4 isotropic space-qualified magnetometer for the SWARM mission. The present paper reviews the progress made in the miniaturization of this isotropic optically pumped magnetometer. Sensor isotropy is provided by a liquid crystal polarization rotator that sets the pumping beam polarization at 90° with respect to the ambient magnetic field. It allows a continuous polarization rotation from 0° to more than 300° with response times sufficient for mobile or space applications. This rotator is non-magnetic and can be easily integrated close to the gas cell. The miniature sensor reaches a sensitivity of 10 pT/√Hz in a bandwidth from DC to 100 Hz.