Seon C R, Choi S H, Cheon M S, Pak S, Lee H G, Biel W, Barnsley R
National Fusion Research Institute, Gwahangno 113, Yuseong-gu, Daejeon 305-333, South Korea.
Rev Sci Instrum. 2010 Oct;81(10):10E508. doi: 10.1063/1.3478550.
A vacuum ultraviolet (VUV) spectrometer of a five-channel spectral system is designed for ITER main plasma impurity measurement. To develop and verify the system design, a two-channel prototype system is fabricated with No. 3 (14.4-31.8 nm) and No. 4 (29.0-60.0 nm) among the five channels. The optical system consists of a collimating mirror to collect the light from source to slit, two holographic diffraction gratings with toroidal geometry, and two different electronic detectors. For the test of the prototype system, a hollow cathode lamp is used as a light source. To find the appropriate detector for ITER VUV system, two kinds of detectors of the back-illuminated charge-coupled device and the microchannel plate electron multiplier are tested, and their performance has been investigated.
为国际热核聚变实验堆（ITER）的主等离子体杂质测量设计了一种五通道光谱系统的真空紫外（VUV）光谱仪。为了开发和验证该系统设计，制作了一个两通道原型系统，采用了五通道中的第3通道（14.4 - 31.8纳米）和第4通道（29.0 - 60.0纳米）。光学系统由一个用于收集从光源到狭缝的光的准直镜、两个具有环形几何形状的全息衍射光栅以及两个不同的电子探测器组成。对于原型系统的测试，使用空心阴极灯作为光源。为了找到适合ITER真空紫外系统的探测器，对背照式电荷耦合器件和微通道板电子倍增器这两种探测器进行了测试，并研究了它们的性能。
