This paper presents a new calibration method of EUV monochromator
that is
measuring line spectrum of 30.38nm and 58.43nm with the standard He hollow cathode source and the reflectivity peak of calibrated Mo/Si multilayer mirror which center position of wavelength is 13.90nm
then the wavelength of Mcpherson247 are determined
and setting a corresponding sign on the track of the monochromator with each standard point which we just calibrate in this experiment and make a curve with two-order parabolic equation by Origin software. When measuring the reflectivity of multilayer mirror by using a soft X-ray reflectometer with laser-produced plasma source
the analyses of calibration results indicate the accuracy is 0.08nm
and the repeatability is ±0.04nm in 1nm ~120nm wavelength band .