Method of displacement determination in calculable capacitor at NIM
| Autor: | Yan Yang, Jianbo Wang, Lu Huang, Zuliang Lu, Tongbao Li, Jin Qian, Zhongyou Liu, Cong Yin |
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| Rok vydání: | 2016 |
| Předmět: |
Physics
Physics::Instrumentation and Detectors business.industry 020208 electrical & electronic engineering Astrophysics::Instrumentation and Methods for Astrophysics Physics::Optics Resonance 02 engineering and technology Laser Capacitance Displacement (vector) law.invention Capacitor Interferometry Optics law Electrode 0202 electrical engineering electronic engineering information engineering business Fabry–Pérot interferometer |
| Zdroj: | 2016 Conference on Precision Electromagnetic Measurements (CPEM 2016). |
| DOI: | 10.1109/cpem.2016.7540587 |
| Popis: | This paper presents the displacement determination of the guard electrode for the new vertical calculable capacitor at NIM. We take a new method for measuring the displacement by actively locking the Fabry-Perot interferometer to a stabilized laser at two cavity lengths of interest. For each of the cavity lengths, the Fabry-Perot interferometer is maintained at its resonance, and the corresponding capacitance of the calculable capacitor is accurately measured by a capacitance bridge. Compared with the classic two-beam interferometer, this displacement-sensing system requires no fringe-counting unit, and is more suitable for the calculable capacitor. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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