High-sensitivity operation of single-beam optically pumped magnetometer in a kHz frequency range
| Autor: | Igor Savukov, Young Jin Kim, Malcolm Boshier, V Shah |
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| Rok vydání: | 2017 |
| Předmět: |
Range (particle radiation)
Materials science Quantitative Biology::Neurons and Cognition medicine.diagnostic_test Magnetometer business.industry Single beam Applied Mathematics Electrical engineering Magnetoencephalography 01 natural sciences law.invention Magnetic field 010309 optics Optics law 0103 physical sciences medicine 010306 general physics Nuclear quadrupole resonance business Instrumentation Engineering (miscellaneous) Sensitivity (electronics) |
| Zdroj: | Measurement Science and Technology. 28:035104 |
| ISSN: | 1361-6501 0957-0233 |
| DOI: | 10.1088/1361-6501/aa58b4 |
| Popis: | Here, optically pumped magnetometers (OPM) can be used in various applications, from magnetoencephalography to magnetic resonance imaging and nuclear quadrupole resonance (NQR). OPMs provide high sensitivity and have the significant advantage of non-cryogenic operation. To date, many magnetometers have been demonstrated with sensitivity close to 1 fT, but most devices are not commercialized. Most recently, QuSpin developed a model of OPM that is low cost, high sensitivity, and convenient for users, which operates in a single-beam configuration. Here we developed a theory of single-beam (or parallel two-beam) magnetometers and showed that it is possible to achieve good sensitivity beyond their usual frequency range by tuning the magnetic field. Experimentally we have tested and optimized a QuSpin OPM for operation in the frequency range from DC to 1.7 kHz, and found that the performance was only slightly inferior despite the expected decrease due to deviation from the spin-exchange relaxation-free regime. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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