Previous R&D of vibrating wire alignment technique for HEPS
  The alignment tolerance of multipoles on a girder is better than 30um in the storage ring of High Energy Photon Source HEPS which will be the next project at IHEP Institute of High Energy Physics. This is difficult to meet the precision only using the traditional optical survey method. In order to achieve this goal, vibrating wire alignment technique with high precision and sensitivity is considered to be used in this project. This paper presents some previous research works about theory, scheme design and achievements. 
Lei Wu, Xiaolong Wang, Chunhua Li, Huamin Qu
physics.acc-ph hep-ex