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Absolute sensitivity calibration of an extreme ultraviolet spectrometer for tokamak measurements

机译:用于托卡马克测量的极端紫外光谱仪的绝对灵敏度校准

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摘要

An extreme ultraviolet spectrometer installed on the Tore Supra tokamak has been calibrated in absolute units of brightness in the range 10-340 Å. This has been performed by means of a combination of techniques. The range 10-113 Å was absolutely calibrated by using an ultrasoft-X ray source emitting six spectral lines in this range. The calibration transfer to the range 113-182 Å was performed using the spectral line intensity branching ratio method. The range 182-340 Å was calibrated thanks to radiative-collisional modelling of spectral line intensity ratios. The maximum sensitivity of the spectrometer was found to lie around 100 Å. Around this wavelength, the sensitivity is fairly flat in a 80 Å wide interval. The spatial variations of sensitivity along the detector assembly were also measured. The observed trend is related to the quantum efficiency decrease as the angle of the incoming photon trajectories becomes more grazing.
机译:安装在撕裂上的紫外线谱仪,以10-340Å的绝对亮度为绝对亮度校准。这是通过一种技术的组合来执行的。通过在此范围内发出六个光谱线来绝对校准10-113埃的范围。使用光谱线强度分支比例进行校准转移到113-182Å的校准传递。由于光谱线强度比的辐射碰撞建模,校准了182-340埃范围。发现光谱仪的最大灵敏度为约100埃。围绕这种波长,灵敏度在80埃间隔内相当平坦。还测量了沿检测器组件的灵敏度的空间变化。由于进入光子轨迹的角度变得更加放牧,所观察到的趋势与量子效率降低有关。

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