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X-ray frequency combs (XFCs) hold significant potential for advanced applications in precision spectroscopy, resonant inelastic X-ray scattering (RIXS), and fundamental physics studies. This paper reports on the experimental preparation for generating high-power tunable XFCs at the Shanghai soft X-ray Free-Electron Laser facility (SXFEL). Building on our theoretical framework, we have developed a chirped frequency-beating laser system to serve as the second seed laser in the echo-enabled harmonic generation (EEHG) scheme. The system employs parallel gratings for introducing precise linear chirp and an optical delay line to control the beating frequency. We detail the commissioning of this laser system, including the optimization of critical parameters such as time delay, chirp rate, and pulse energy to satisfy the stringent requirements for XFC generation. Electron beam conditioning has been performed to achieve the optimal energy spread and peak current required for high-gain EEHG operation. Preliminary tests confirm the generation of the chirped frequency-beating laser pulses with precisely controlled. Diagnostic setups for XFC characterization have been installed at the experimental hall, including a grating-based spectrometer with high spectral resolution. This experimental work paves the way for the first demonstration of fully coherent, high-power XFCs in the soft X-ray regime offering unprecedented capabilities for time-resolved spectroscopic investigations.
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