The SXFEL Upgrade: From Test Facility to User Facility
Bo Liu, Chao Feng, Duan Gu, Fei Gao, Haixiao Deng, Meng Zhang, Sen Sun, Si Chen, Wei Zhang, Wencheng Fang, Zhen Wang, Qiaogen Zhou, Yongbin Leng, Ming Gu, Lixin Yin, Qiang Gu, Guoping Fang, Dong Wang, Zhentang Zhao
Abstract
The Shanghai soft X-ray Free-Electron Laser facility (SXFEL), which is the first X-ray FEL facility in China, is being constructed in two phases: the test facility (SXFEL-TF) and the user facility (SXFEL-UF). The test facility was initiated in 2006 and funded in 2014. The commissioning of the test facility was finished in 2020. The user facility was funded in 2016 to upgrade the accelerator energy and build two undulator lines with five experimental end-stations. The output photon energy of the user facility will cover the whole water window range. This paper presents an overview of the SXFEL facility, including considerations of the upgrade, layout and design, construction status, commissioning progress and future plans.