用于国际热核聚变实验堆（ITER）杂质注入监测器（偏滤器）的采用成角度物理接触光纤的原位光谱校准方法。

In situ spectral calibration method for the impurity influx monitor (divertor) for ITER using angled physical contact fibers.

作者信息

Iwamae A, Ogawa H, Sugie T, Kusama Y

机构信息

Fusion Research and Development Directorate, Japan Atomic Energy Agency, Ibaraki 311-0193, Japan.

出版信息

Rev Sci Instrum. 2011 Mar;82(3):033502. doi: 10.1063/1.3559117.

DOI:10.1063/1.3559117

PMID:21456732

Abstract

The in situ calibration method for the impurity influx monitor (divertor) is experimentally examined. The total reflectance of the optical path from the focal point of the Cassegrain telescope to the first mirror is derived using a micro retroreflector array. An optical fiber with angled physical contact (APC) connectors reduces the return edge reflection. APC fibers and a multimode coupler increase the signal-to-noise ratio by about one order compared to that of triple-branched fibers and enable measurement of the wavelength dependence of the total reflectance of the optical system even after potential deterioration of mirror surfaces reduces reflectance.

摘要

对杂质注入监测器（偏滤器）的原位校准方法进行了实验研究。使用微角反射器阵列得出从卡塞格伦望远镜焦点到第一面镜子的光路的总反射率。带有斜角物理接触（APC）连接器的光纤可减少反射边缘反射。与三分支光纤相比，APC光纤和多模耦合器使信噪比提高了约一个数量级，并且即使在镜面可能劣化导致反射率降低之后，也能够测量光学系统总反射率的波长依赖性。