Localized measurements of turbulence in the TORE SUPRA tokamak
Localized measurements of turbulence in the TORE SUPRA tokamak
复制标题
DOI：
10.1088/0741-3335/35/1/005
复制
发表时间：
1993
影响因子：
2.2
通讯作者：
P. Devynck;X. Garbet;C. Laviron;J. Payan;S. Saha;F. Gervais;P. Hennequin;A. Quéméneur;A. Truc
中科院分区：
文献类型：
--
作者：
P. Devynck;X. Garbet;C. Laviron;J. Payan;S. Saha;F. Gervais;P. Hennequin;A. Quéméneur;A. Truc
在TORE SUPRA托卡马克装置上安装了一台用于测量等离子体密度起伏的集体红外激光散射诊断装置。对于探索的波数范围（3-15 cm-1），散射角非常弱（约1 mrad）。因此，散射信号沿整个观测弦被沿着平均，导致较差的纵向空间定位。由于托卡马克中磁力线的俯仰角变化，以及湍流波矢对这些磁力线的平行性，有可能获得沿束流方向的部分空间分辨率沿着。诊断的实验和理论角分辨率之间的良好一致性以及对由两个同时探测光束获得的信号进行互相关的结果也证明了这种新颖的概念。
A collective infra-red laser scattering diagnostic has been installed on the TORE SUPRA tokamak for the measurement of plasma density fluctuations. For the range of wavenumbers explored (3-15 cm-1), the scattering angles are very weak ( approximately 1 mrad). Consequently, the scattering signals are averaged along the whole observation chord, resulting in poor longitudinal spatial localization. By virtue of the pitch angle variation of the magnetic field lines in the tokamak, and of the perpendicularity of the turbulence wavevector to these field lines, it has been possible to obtain partial spatial resolution along the direction of the beam. Good agreement between the experimental and theoretical angular resolution of the diagnostic as well as the results of cross-correlation performed on the signals obtained by two simultaneous probing beams also justify this novel concept.