Conceptual design of the collection optics for the edge Thomson scattering system in ITER

Yatsuka, E.; Hatae, T.; Suitoh, S.; Aida, Y.; Kusama, Y.
October 2010
Review of Scientific Instruments;Oct2010, Vol. 81 Issue 10, p10D541
Academic Journal
Neutron and gamma-ray irradiation complicates the design of the edge Thomson scattering (TS) system in ITER. The TS light is relayed through the relaying optics with labyrinth and fiber coupling optics. Electron density of 2×1019 m-3 is sufficient to measure Te and ne within a 10% and 5% margin of error, respectively, with a spatial resolution of 5 mm. This system can cover from 0.85 to 1 of the normalized minor radius. The time resolution is 10 ms, which is determined by the repetition rate of the laser device. A super-Gaussian is the ideal laser profile for the laser injection optics to avoid a breakdown of the filling gas used in density calibration through Raman scattering.


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