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首页> 外文期刊>Plasma physics and controlled fusion >Alfven eigenmode observations on DIII-D via two-colour CO2 interferometry
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Alfven eigenmode observations on DIII-D via two-colour CO2 interferometry

机译：通过双色CO2干涉仪在DIII-D上进行Alfven本征模式观察

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摘要

Measurements are presented of toroidicity-induced (TAEs) and reverse shear (RSAEs) Alfven eigenmodes made using the standard two-colour CO2 interferometer on DIII-D modified for increased bandwidth. Typical values of the effective line-integrated density perturbation in DIII-D are found to be d(nL)L similar to 10(-3), and comparisons are made with NOVA calculations as well as magnetic measurements. There is a strong difference in the measured power spectrum between vertical and radial chords through the plasma. On average, vertical views are characterized by a larger line-integrated density perturbation due to TAEs than radial chords. Radial chords, however, can be used much more reliably than vertical chords to identify the presence of RSAEs in the plasma-a result found to be due to the radially localized nature of these modes. In general, the apparent amplitude of the observed modes for both TAE and RSAE is found to be highly dependent on viewing location.
机译：给出了在DIII-D上使用标准的两色CO2干涉仪制作的环形感应（TAE）和反向剪切（RSAE）Alfven本征模式的测量值，并针对增加的带宽进行了修改。发现DIII-D中有效线积分密度扰动的典型值为d（nL）/ nL，与10（-3）相似，并且使用NOVA计算和磁测量进行了比较。通过等离子体的垂直和径向弦之间的测量功率谱存在很大差异。平均而言，垂直视图的特征是由于TAE导致的线积分密度扰动比径向弦更大。但是，径向弦可以比垂直弦更可靠地用于识别血浆中RSAE的存在-结果是由于这些模式的径向局部性质。通常，发现TAE和RSAE的观测模式的表观振幅高度依赖于观看位置。

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