Liu, C.Y. Chen, Y. Hao, X.R. He, J.H. Li, H. Li, H.H. Li, J. Nie, Y. Wang, J. Wang, Y. Wei, G. Xiang, P. Xu, Y. Zhang, J.M. Zhang, Y.X. Zou, Y. JACoW Publishing Geneva, Switzerland 2673-5520 978-3-95450-250-9 10.18429/JACoW-MEDSI2023-TUPYP050 English 105-107 vacuum photon storage-ring radiation synchrotron Contribution to a conference proceedings 2024 2024-07 https://doi.org/10.18429/JACoW-MEDSI2023-TUPYP050 https://jacow.org/medsi2023/papers/tupyp050.pdf Wuhan Advanced Light Source (WALS) is a fourth-generation synchrotron radiation facility with 1.5 GeV designed energy and 500 mA beam current. The storage ring vacuum system has to be designed in such a way which is compatible with a multi-bend achromat (MBA) compact lattice. the new technology of non-evaporable getter (NEG) coating was used, which is more and more popular in accelerator equipment. The design of the whole vacuum chamber and the nec-essary calculations were posted in the paper. The results indicated that the design of the vacuum system can meet the design requirement.