| Autor: |
Weixing Ding, D. Taussig, D. L. Brower, Jie Chen, R. L. Boivin, D. K. Finkenthal, Christopher Muscatello |
| Rok vydání: |
2016 |
| Předmět: |
|
| Zdroj: |
The Review of scientific instruments. 87(11) |
| ISSN: |
1089-7623 |
| Popis: |
Motivated by the need to measure fast equilibrium temporal dynamics, non-axisymmetric structures, and core magnetic fluctuations (coherent and broadband), a three-chord Faraday-effect polarimeter-interferometer system with fast time response and high phase resolution has recently been installed on the DIII-D tokamak. A novel detection scheme utilizing two probe beams and two detectors for each chord results in reduced phase noise and increased time response [δb ∼ 1G with up to 3 MHz bandwidth]. First measurement results were obtained during the recent DIII-D experimental campaign. Simultaneous Faraday and density measurements have been successfully demonstrated and high-frequency, up to 100 kHz, Faraday-effect perturbations have been observed. Preliminary comparisons with EFIT are used to validate diagnostic performance. Principle of the diagnostic and first experimental results is presented. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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