Sub nano kelvin thermometry and temperature stabilization using resonant cavity thermometry
Abstract/Contents
- Abstract
- This thesis describes a general purpose high resolution thermometer based on measuring the resonant frequency of an optical cavity with high coefficient of expansion. It is capable of operating at an arbitrary temperature near room temperature and we have demonstrated an exceptionally low noise figure of 6.6 nK/rtHz at 1Hz. The thermometer has a continuous dynamic range of 0.74 K and an estimated total dynamic range of > 400 K. We evaluate its performance by observing the beat note between the cavity resonance and a reference frequency derived from an ultra low expansion coefficient glass cavity operating near its expansion coefficient null. A hyperfine line feature at a10 transition in iodine near 532 nm is used to calibrate both optical cavities. The temperature sensitivity of the device estimated from its expansion coefficient was found to agree with thermistor measurements to within measurement uncertainty. The device shows a steady drift when compared with the thermistor over many hours. After removing this drift, the resulting calibrated signal is used as an error signal for thermal control, and 7.6 nK stability is achieved with 1 s integration time. When averaged over longer time spans the device shows improved noise performance reaching 200 pK temperature stability at 10,000 s integration time. We describe its construction and performance and mention some modifications to improve its utility.
Description
| Type of resource | text |
|---|---|
| Form | electronic; electronic resource; remote |
| Extent | 1 online resource. |
| Publication date | 2016 |
| Issuance | monographic |
| Language | English |
Creators/Contributors
| Associated with | Tan, Si |
|---|---|
| Associated with | Stanford University, Department of Mechanical Engineering. |
| Primary advisor | Byer, R. L. (Robert L.), 1942- |
| Primary advisor | Goodson, Kenneth E, 1967- |
| Thesis advisor | Byer, R. L. (Robert L.), 1942- |
| Thesis advisor | Goodson, Kenneth E, 1967- |
| Thesis advisor | DeBra, D. B. (Daniel B.) |
| Thesis advisor | Lipa, John A |
| Advisor | DeBra, D. B. (Daniel B.) |
| Advisor | Lipa, John A |
Subjects
| Genre | Theses |
|---|
Bibliographic information
| Statement of responsibility | Si Tan. |
|---|---|
| Note | Submitted to the Department of Mechanical Engineering. |
| Thesis | Thesis (Ph.D.)--Stanford University, 2016. |
| Location | electronic resource |
Access conditions
- Copyright
- © 2016 by Si Tan
- License
- This work is licensed under a Creative Commons Attribution Non Commercial 3.0 Unported license (CC BY-NC).
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