In order to measure the relative spectrum distribution of soft X-ray source
it is proposed to calibrate the channel electron multiplier(CEM)using a silicon transfer standard photodiode calibrated by NIST. The quantum efficiency of the CEM has been determined using the calibration method proposed while CEM was biased to 1.3 kV. The analysis of calibration results indicates that the calibration error of CEM is 11%~17% in the 8~30 nm region.
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references
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