Fonck R J, Ramsey A T, Yelle R V
Princeton University, Plasma Physics Laboratory, Princeton, New Jersey 08544, USA.
Appl Opt. 1982 Jun 15;21(12):2115-23. doi: 10.1364/AO.21.002115.
A compact vacuum ultraviolet spectrometer system has been developed to provide time-resolved impurity spectra from tokamak plasmas. Two interchangeable aberration-corrected toroidal diffraction gratings with flat focal fields provide simultaneous coverage over the ranges 100-1100 A or 160-1700 A. The detector is an intensified self-scanning photodiode array. Spectral resolution is 2 A with the higher dispersion grating. Minimum readout time for a full spectrum is 20 msec, but up to seven individual spectral lines can be measured with a 1-msec time resolution. The sensitivity of the system is comparable with that of a conventional grazing-incidence monochromator.
已开发出一种紧凑型真空紫外光谱仪系统，用于提供托卡马克等离子体的时间分辨杂质光谱。两个具有平面焦场的可互换像差校正环形衍射光栅可同时覆盖100 - 1100埃或160 - 1700埃的范围。探测器是一个增强型自扫描光电二极管阵列。使用高色散光栅时，光谱分辨率为2埃。全光谱的最短读出时间为20毫秒，但高达七条单独的谱线可以以1毫秒的时间分辨率进行测量。该系统的灵敏度与传统掠入射单色仪相当。
