| Zugriffsnummer | 45705 |
| Dokumenttyp | Zeitschriftenartikel |
| Peer Review | mit Peer Review |
| Sprache | Englisch |
| Titel | Fast and robust optically pumped cesium magnetometer |
| Autor(in); Institution |
Lebedev, Victor; 8.2, Biosignale, PTB-Berlin
Hartwig, Stefan; 8.2, Biosignale, PTB-Berlin
Middelmann, Thomas; 8.2, Biosignale, PTB-Berlin
|
| Quelle/Jahr | Advanced Optical Technologies: 9 (2020), 5, 275 - 286 |
| ISSN | 2192-8576 (PRINT) ; 2192-8584 (ONLINE) |
| DOI | |
| Verlag | Berlin: De Gruyter |
| Freie Schlagworte | high speed ; optically detected magnetic resonance ; optically pumped magnetometer ; phase feedback ; unshielded operation |
| Zusammenfassung | We present a fast and robust optically pumped magnetometer that is based on a feedback-controlled spin ensemble of cesium atoms in spin-polarized vapor. The table-top system is intended for operation in unshielded environment, and its design allows conversion into a handheld sensor head. Under strongly disturbed environmental conditions in the laboratory, the sensor exhibits a speed of more than 56 kHz, while having a slew rate of 39mT/s and a full dynamic range of 10 - 120 μT. Under these conditions a sensitivity of 33 pT/√Hz is reached. By reducing the speed to 3.6 kHz the sensitivity can be improved to 6pT/√Hz, which is close to the shot noise limit. We describe the sensor design and its optimization and demonstrate the performance of the sensor under conditions appropriate for magnetic susceptometry measurements. |
| Themenbereich der Metrologie | Metrologie in der Medizin |