A tunable XUV monochromatic light source based on the time preserving grating selection of high-order harmonic generation

Niu Yong^{1, 2}, Liang Hongjing^{1, 2}, Liu Yi^{1, 2}, Liu Fangyuan^{1, 2}, Ma Ri^{1, 2, †}, Ding Dajun^{1, 2, ‡}

(a) The design of the monochromator. Wavelength scanning is performed by rotating the grating around the axis that is tangent to the surface and is parallel to the grooves. (b) Geometry of the conical diffraction mount. The inset shows blaze condition of maximum efficiency where δ is the blaze angle.