Yatsuka E, Hatae T, Suitoh S, Aida Y, Kusama Y
Japan Atomic Energy Agency, Naka, Ibaraki 311-0193, Japan.
Rev Sci Instrum. 2010 Oct;81(10):10D541. doi: 10.1063/1.3492424.
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 2×10(19) m(-3) is sufficient to measure T(e) and n(e) 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.
中子和伽马射线辐照使国际热核聚变实验堆（ITER）边缘汤姆逊散射（TS）系统的设计变得复杂。TS光通过带有迷宫式结构的中继光学系统和光纤耦合光学系统进行中继传输。电子密度为2×10¹⁹ m⁻³时，足以分别在10%和5%的误差范围内测量电子温度（T(e)）和电子密度（n(e)），空间分辨率为5毫米。该系统可覆盖归一化小半径的0.85至1的范围。时间分辨率为10毫秒，这由激光装置的重复频率决定。超高斯分布是激光注入光学系统的理想激光分布，可避免因拉曼散射导致密度校准中使用的填充气体击穿。
