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EnglishA novel microwave whispering gallery mode (WGM) resonator based on a spherical sapphire crystal was developed at INRIM and its use as a thermometer was tested. The temperature dependence of the WGM frequencies was studied and the most promising resonance near to 13.6 GHz, with a loaded quality factor as large as 82 000, was carefully investigated. Its potential use in thermometry was evaluated through a study of its main metrological characteristics, such as the temperature sensitivity, the frequency stability, the repeatability, and the resolution at several temperatures over the temperature range −40 ◦C to 85◦C. Finally, the INRIM spherical sapphire thermometer was compared with the NIST SWGT, a dielectric thermometer based on a cylindrical sapphire resonator [V. B. Braginsky, V. S. Ilchenko, and Kh. S. Bagdassarov, Phys. Lett. A 120(3), 300 (1987)].
Spherical-sapphire-based whispering gallery mode resonator thermometer / YU LILI; FERNICOLA V. - In: REVIEW OF SCIENTIFIC INSTRUMENTS. - ISSN 0034-6748. - 83:094903(2012), pp. 094903-1-094903-5.
| Titolo: | Spherical-sapphire-based whispering gallery mode resonator thermometer |
| Autori: | |
| Data di pubblicazione: | 2012 |
| Rivista: | |
| Citazione: | Spherical-sapphire-based whispering gallery mode resonator thermometer / YU LILI; FERNICOLA V. - In: REVIEW OF SCIENTIFIC INSTRUMENTS. - ISSN 0034-6748. - 83:094903(2012), pp. 094903-1-094903-5. |
| Abstract: | A novel microwave whispering gallery mode (WGM) resonator based on a spherical sapphire crystal was developed at INRIM and its use as a thermometer was tested. The temperature dependence of the WGM frequencies was studied and the most promising resonance near to 13.6 GHz, with a loaded quality factor as large as 82 000, was carefully investigated. Its potential use in thermometry was evaluated through a study of its main metrological characteristics, such as the temperature sensitivity, the frequency stability, the repeatability, and the resolution at several temperatures over the temperature range −40 ◦C to 85◦C. Finally, the INRIM spherical sapphire thermometer was compared with the NIST SWGT, a dielectric thermometer based on a cylindrical sapphire resonator [V. B. Braginsky, V. S. Ilchenko, and Kh. S. Bagdassarov, Phys. Lett. A 120(3), 300 (1987)]. |
| Handle: | http://hdl.handle.net/11696/34410 |
| Appare nelle tipologie: | 1.1 Articolo in rivista |
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