Detection of short-scale turbulence in the next generation of tokamak burning plasma experiments
Detection of short-scale turbulence in the next generation of tokamak burning plasma experiments
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DOI：
10.1088/0741-3335/48/12/005
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发表时间：
2006-11
影响因子：
2.2
通讯作者：
E. Mazzucato
中科院分区：
文献类型：
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作者：
E. Mazzucato
在本文中，我们讨论了在下一代托卡马克燃烧等离子体实验中使用CO2激光的相干散射高分辨率测量短尺度湍流起伏。所提出的方案的独特之处在于探测光束相对于磁场的倾斜传播，场线的环形曲率在提高测量信号的空间分辨率方面发挥了重要作用。此外，小的散射角和可以忽略的波折射效应使所需端口的尺寸最小化，这对于必须在燃烧等离子体的恶劣环境中操作的等离子体诊断至关重要。
In this paper, we discuss the use of coherent scattering of CO2 lasers for high resolution measurements of short-scale turbulent fluctuations in the next generation of tokamak burning plasma experiments. The unique feature of the proposed scheme is the oblique propagation of the probing beam with respect to the magnetic field, with the toroidal curvature of field lines playing a major role in improving the spatial resolution of measured signals. In addition, small scattering angles and negligible wave refraction effects minimize the size of needed ports—a matter of vital importance for a plasma diagnostic that must operate in the hostile environment of a burning plasma.