In this paper, a conceptual design of a hard X-ray Free-Electron Laser (FEL) facility based on CLIC-like X-band accelerating structure has been presented. The injector, based on an X-band rf gun, the main accelerating sections, using high-gradient CLIC-like structures including rf power distribution, and the two bunch compressors have been discussed. Simulations of the rf gun, of the injector, and of the linac have been performed, successfully meeting the stringent requirements in terms of minimum projected emittance, sliced emittance, and minimum bunch length. Full 6-D start-to-end linac simulations have been performed taking into account wakefield effects, misalignment of accelerator components, Coherent Synchrotron Radiation (CSR), and small dynamic variations of phase, voltage, and injection time. The performance of FEL at $\lambda =1\text{Å}$ has also been evaluated for self-amplified spontaneous emission (SASE) FEL mode. A radiation power of about 10 GW has been achieved with a photon pulse length of 30 fs. The main advantage of the proposed design is that it achieved the required beam parameters in very short length, rendering the facility quite compact.

本文提出了一种基于类CLIC的X波段加速结构的硬X射线自由电子激光（FEL）设备的概念设计。讨论了基于X波段RF喷枪的喷油器，主要加速段，采用类似于RFC功率分配的高梯度CLIC结构以及两束压缩机。射频枪，喷油器和直线加速器的仿真已经执行，成功满足了最小投影发射率，切片发射率和最小束长度方面的严格要求。考虑到尾流场效应，加速器组件的不对准，相干同步辐射（CSR）以及相，电压和注入时间的微小动态变化，已经进行了完整的6D从头到尾直线加速器仿真。FEL的表现$\lambda =\mathrm{1个}\text{一种}$还针对自放大自发发射（SASE）FEL模式进行了评估。在30 fs的光子脉冲长度下已达到约10 GW的辐射功率。所提出的设计的主要优点是，它可以在很短的长度内达到所需的光束参数，从而使设备相当紧凑。