Opto-Mechanical systems design for polarimeter-interferometer on EAST
| Autor: | Yinxian Jie, Huajian Liu, Z.Y. Zou, Weixing Ding, D. L. Brower, Y.Y. Yang, Ying Yao, W.M. Li, Tao Lan, Long Zeng |
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| Rok vydání: | 2016 |
| Předmět: |
010302 applied physics
Materials science Extinction ratio Stray light business.industry Mechanical Engineering Polarimeter 01 natural sciences 010305 fluids & plasmas Vibration Interferometry symbols.namesake Vibration isolation Optics Nuclear Energy and Engineering 0103 physical sciences Faraday effect symbols General Materials Science business Zemax Civil and Structural Engineering |
| Zdroj: | Fusion Engineering and Design. 112:251-256 |
| ISSN: | 0920-3796 |
| DOI: | 10.1016/j.fusengdes.2016.09.016 |
| Popis: | An 11-channel Far-InfaRed (FIR) three-wave POlarimeter-INTerferometer (POINT) system has been successfully operated in 2015 EAST experimental campaign. For high accuracy measurement of POINT system, optimized optical system to reduce the stray light and crosstalk is very important. Optical design is done and improved by using ZEMAX software, in which spot size and energy distribution can be calculated in any position. The crosstalk and stray light can be reduced by optimized design of optical components and putting high extinction ratio materials in some key positions. Vibration isolation coefficient of optical platform is set to 90%. The optical platform and vibration isolation system are about 5 and 20 tons in weight respectively. To reduce vibration caused by the EAST hall, a more than 30 tons in weight stainless steel tower, filled with sand and mounted independent of the EAST machine, is constructed to ensure the stability of optics. Based on the optimized opto-mechanical design, the POINT system resolutions for Faraday rotation and line integral electron density measurements are 0.1° and 1 × 10 16 m −2 , respectively. |
| Databáze: | OpenAIRE |
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