Optimization of optical filters for ITER edge Thomson scattering diagnostics
| Autor: | Takaki Hatae, Shin Kajita, O. Naito |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
Materials science
Thomson scattering business.industry Mechanical Engineering Bremsstrahlung Laser Avalanche photodiode law.invention Polychromator Filter (large eddy simulation) Wavelength Optics Nuclear Energy and Engineering law General Materials Science Optical filter business Civil and Structural Engineering |
| Zdroj: | Fusion Engineering and Design. 84:2214-2220 |
| ISSN: | 0920-3796 |
| DOI: | 10.1016/j.fusengdes.2009.04.005 |
| Popis: | In the ITER edge Thomson scattering measurement system, polychromators with optical band-pass filters and avalanche photodiodes are planned to be used. In this paper, we optimized the transmission wavelength ranges of the optical filters by a numerical method. Since measurements in a high electron temperature range are required for the measurement system, the Thomson spectrum could overlap a strong line emission of D α when the electron temperature is rather high. It is shown that a filter whose transmission wavelength range is shorter than D α becomes important to decrease the measurement error in the high temperature range. Moreover, it is found that a filter whose transmission wavelength range is above 1064 nm (laser wavelength) is useful to improve the measurement accuracy, in particular, when the number of filters is more than six. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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