JET polari-interferometer
JET polari-interferometer
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DOI：
10.1063/1.1140666
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发表时间：
1989-09
影响因子：
1.6
通讯作者：
G. Braithwaite;N. Gottardi;G. Magyar;J. O'Rourke;J. Ryan;D. Véron
中科院分区：
文献类型：
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作者：
G. Braithwaite;N. Gottardi;G. Magyar;J. O'Rourke;J. Ryan;D. Véron
介绍了一种用于欧洲联合环面（JET）的多通道远红外干涉仪。光源为195 μm DCN激光器。该仪器为马赫-曾德尔型，带有外差检测系统。调制频率（100千赫）由旋转光栅的衍射产生。有六条垂直通道和两条斜向通道。后者依赖于安装在容器壁上的反射镜的反射。它们的振动由118.8 μm的第二波长干涉仪补偿。描述了各种子系统，重点是(a)大路径长度、(b)远程处理要求、(c)大气湿度波动和(d)无人驾驶自动操作所必需的特征。典型的测量，随着实时和离线的数据分析，提出。相移测量的精度为条纹的(1)/(20)，对应于线积分电子密度5×1017 m−2。与其他电子密度诊断的比较显示....
A multichannel far‐infrared interferometer used on the Joint European Torus (JET) is described. The light source is a 195‐μm DCN laser. The instrument is of the Mach–Zehnder type, with a heterodyne detection system. The modulation frequency (100 kHz) is produced by diffraction from a rotating grating. There are six vertical and two oblique channels. The latter rely on retroreflection from mirrors mounted on the vessel wall. Their vibration is compensated by a second wavelength interferometer at 118.8 μm. The various subsystems are described, with emphasis on features necessitated by (a) large path lengths, (b) remote handling requirements, (c) fluctuations in atmospheric humidity, and (d) unmanned automatic operation. Typical measurements, along with real‐time and off‐line data analysis, are presented. The phase‐shift measurement is made with an accuracy of (1)/(20) of a fringe, corresponding to a line‐integrated electron density of 5×1017 m−2. Comparison with other electron density diagnostics are shown....