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An Optically Pumped Magnetometer Working in the Light-Shift Dispersed M(z) Mode
We present an optically pumped magnetometer working in a new operational mode—the light-shift dispersed M(z) (LSD-Mz) mode. It is realized combining various features; (1) high power off-resonant optical pumping; (2) M(z) configuration, where pumping light and magnetic field of interest are oriented...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2017
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5375847/ https://www.ncbi.nlm.nih.gov/pubmed/28287414 http://dx.doi.org/10.3390/s17030561 |
Sumario: | We present an optically pumped magnetometer working in a new operational mode—the light-shift dispersed M(z) (LSD-Mz) mode. It is realized combining various features; (1) high power off-resonant optical pumping; (2) M(z) configuration, where pumping light and magnetic field of interest are oriented parallel to each other; (3) use of small alkali metal vapor cells of identical properties in integrated array structures, where two such cells are pumped by circularly polarized light of opposite helicity; and (4) subtraction of the M(z) signals of these two cells. The LSD-Mz magnetometer’s performance depends on the inherent and very complex interplay of input parameters. In order to find the configuration of optimal magnetometer resolution, a sensitivity analysis of the input parameters by means of Latin Hypercube Sampling was carried out. The resulting datasets of the multi-dimensional parameter space exploration were assessed by a subsequent physically reasonable interpretation. Finally, the best shot-noise limited magnetic field resolution was determined within that parameter space. As the result, using two 50 mm(3) integrated vapor cells a magnetic field resolution below 10 fT/√Hz at Earth’s magnetic field strength is possible. |
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