Ma Yongsheng
IHEP of CAS
vacuum engineer for accelerator
Research Areas
UHV vacuum development for particle accelerator, NEG coating, Nb coating on copper cavity, Plasma spraying.
NEG coating development for HEPS，and completed the massive NEG coating on the inner walls of chromium-zirconium-copper vacuum chambers for the high-energy synchrotron radiation light source （HEPS）.
Responsible for the design and key technology development of the CEPC vacuum system，which included: developing low-impedance, long-life NEG coatings; establishing automated production lines for NEG and heating coatings; designing all-metal gate valves integrated with RF shielding; engineering large-scale vacuum chambers; and conducting in-depth studies on beam-influencing surface characteristics, such as Photon Stimulated Desorption (PSD) and Secondary Electron Yield (SEY).
Education
Dr
Publications
Papers
（2） Cage effect of film mesoscopic structure on activation of TiZrHfV non-evaporable getter, VACUUM, 2024, 第 3 作者 通讯作者
（3） Preparation and characterization of Ti-Zr-V-Cu getter films, Preparation and characterization of Ti-Zr-V-Cu getter films, RADIATION DETECTION TECHNOLOGY AND METHODS, 2024, 第 8 作者
（4） Unveiling the secrets of non-evaporable getter films: Activation temperature, activation time, and achievable activation degree, JOURNAL OF ALLOYS AND COMPOUNDS, 2024, 第 3 作者 通讯作者
（5） Effect of atomic-scale microstructures on TiZrV non-evaporable getter film activation, JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B, 2023, 第 4 作者
（6） 1.3 GHz高频铜腔磁控溅射镀铌工艺研究, Niobium Coating by Magnetron Sputtering in 1.3 GHz High Frequency Copper Cavity, 真空科学与技术学报, 2023, 第 1 作者
（7） The growth progress of Nb films on Cu:a molecular dynamics simulation, The growth progress of Nb films on Cu:a molecular dynamics simulation, RADIATION DETECTION TECHNOLOGY AND METHODS, 2023, 第 3 作者
（8） Development of ceramic vacuum chamber for collider ring kicker of Circular Electron Positron Collider (CEPC), VACUUM, 2023, 第 4 作者
（9） Neon venting of activated NEG-coated beam pipes in IHEP, Radiation Detection Technology and Methods (2022) 6:479–483, 2022, 第 4 作者
（10） Activation of Zr, ZrVHf and TiZrV Non-Evaporative Getters Characterized by In Situ Synchrotron Radiation Photoemission Spectroscopy, APPLIED SCIENCES-BASEL, 2021, 第 2 作者
（11） 薄膜缺陷研究进展综述, Review on the Study Progress in Defects of Coating, 表面技术, 2021, 第 1 作者
（12） 博士学位论文—超导高频腔镀铌工艺研究, 2021, 第 1 作者
（13） Aging effect of non-evaporable getter coatings, Aging effect of non-evaporable getter coatings, 辐射探测技术与方法(英文), 2020, 第 2 作者
（14） Deposition and characterization of Pd-Ti thin film by sublimation, Deposition and characterization of Pd-Ti thin film by sublimation, 辐射探测技术与方法(英文), 2020, 第 3 作者
（15） 超导高频铜腔镀铌研究进展, Latest Progress in Nb-Coating Synthesized on Wall of Superconducting RF Cu-Cavity:A Review Study, 真空科学与技术学报, 2020, 第 1 作者
（16） The vacuum system of the China spallation neutron source, VACUUM, 2018, 第 10 作者