Far-infrared polarimetry diagnostic for measurement of internal magnetic field dynamics and fluctuations in the C-MOD Tokamak (invited).
Far-infrared polarimetry diagnostic for measurement of internal magnetic field dynamics and fluctuations in the C-MOD Tokamak (invited).
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DOI：
10.1063/1.4731757
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发表时间：
2012-07
期刊：
影响因子：
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通讯作者：
W. Bergerson;P. Xu;J. Irby;D. Brower;W. Ding;E. Marmar
中科院分区：
文献类型：
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作者：
W. Bergerson;P. Xu;J. Irby;D. Brower;W. Ding;E. Marmar
一个基于激光（2.55太赫兹）的多弦偏振计现在在Alcator C-Mod上运行，用于测量内部磁场结构以及等离子体波动。偏振计设计用于测量ITER相关等离子体条件下的高场（高达8.3 T）和高密度（高达5 × 10（20）m（-3））的法拉第效应。最初的3个弦测试与磁平衡重建一致，表明由于Cotton-Mouton效应或未对准，没有可测量的环形磁场污染。<1 μs的时间响应能够测量快速平衡时间动态以及高频波动。
A laser-based (2.55 THz) mulitchord polarimeter is now operational on Alcator C-Mod and is used to make measurements of the internal magnetic field structure as well as plasma fluctuations. The polarimeter is designed to measure the Faraday effect for high-field (up to 8.3 T) and high-density (up to 5 × 10(20) m(-3)) ITER relevant plasma conditions. Initial 3 chord tests are consistent with magnetic equilibrium reconstructions and indicate no measurable contamination from the toroidal magnetic field due to the Cotton-Mouton effect or misalignment. Time response of <1 μs enables the measurement of fast equilibrium temporal dynamics as well as high-frequency fluctuations.