@misc{indiciae4fce6f4fe853,
  title = {Note: O-ring stack system for electron gun alignment},
  author = {Park, In-Yong and Cho, Boklae and Han, Cheolsu and Shin, Seungmin and Lee, Dongjun},
  year = {2015},
  doi = {10.1063/1.4905575},
  url = {https://www.osti.gov/biblio/22392340},
  note = {Source identifier: 22392340}
}