Pedreira P, Esteban L, Criado A R, Acedo P, Sánchez M, Sánchez J
Department of Electronics Technology, Universidad Carlos III de Madrid, Leganes, Madrid 28911, Spain.
Rev Sci Instrum. 2010 Oct;81(10):10D517. doi: 10.1063/1.3475729.
A high spatial resolution two color [CO(2), λ=10.6 μm/Nd:YAG (Nd:YAG denotes neodymium-doped yttrium aluminum garnet), and λ=1.064 μm] expanded-beam multichannel heterodyne interferometer has been installed on the TJ-II stellarator. Careful design of the optical system has allowed complete control on the evolution of both Gaussian beams along the interferometer, as well as the evaluation and optimization of the spatial resolution to be expected in the measurements. Five CO(2) (measurement) channels and three Nd:YAG (vibration compensation) channels have been used to illuminate the plasma with a probe beam of 100 mm size. An optimum interpolation method has been applied to recover both interferometric phasefronts prior to mechanical vibration subtraction. The first results of the installed diagnostic are presented in this paper.
一台高空间分辨率的双色[二氧化碳，波长λ = 10.6微米/钕钇铝石榴石（Nd:YAG表示掺钕钇铝石榴石），波长λ = 1.064微米]扩束多通道外差干涉仪已安装在TJ-II仿星器上。光学系统的精心设计使得能够完全控制高斯光束在干涉仪中的传播，以及对测量中预期的空间分辨率进行评估和优化。五个二氧化碳（测量）通道和三个Nd:YAG（振动补偿）通道用于用尺寸为100毫米的探测光束照射等离子体。在进行机械振动减法之前，应用了一种最佳插值方法来恢复两个干涉相位前沿。本文给出了已安装诊断设备的初步结果。
