| AVS 62nd International Symposium & Exhibition | |
| Vacuum Technology | Wednesday Sessions |
| Session VT-WeM |
| Session: | Accelerator and Large Vacuum Systems |
| Presenter: | Gao-Yu Hsiung, National Synchrotron Radiation Research Center, Taiwan, Republic of China |
| Authors: | G.Y. Hsiung, National Synchrotron Radiation Research Center, Taiwan, Republic of China Y.C. Yang, National Synchrotron Radiation Research Center, Taiwan, Republic of China H.P. Hsueh, National Synchrotron Radiation Research Center, Taiwan, Republic of China L.H. Wu, National Synchrotron Radiation Research Center, Taiwan, Republic of China C.M. Cheng, National Synchrotron Radiation Research Center, Taiwan, Republic of China C.K. Chan, National Synchrotron Radiation Research Center, Taiwan, Republic of China J.R. Chen, National Synchrotron Radiation Research Center, Taiwan, Republic of China |
| Correspondent: | Click to Email |
The Taiwan Photon Source (TPS), a 3 GeV synchrotron light source composed of a booster synchrotron and the electron storage ring concentrically installed in the same tunnel, has been completed the construction and the installation in July 2014. Then the commissioning of the booster has been started and reached to the goal of 3 GeV full-energy-injections on Dec.17. After tuning the beam parameters, the electron beam was stored at 1 mA beam current, extracting the first synchrotron light, and raised to 4.5 mA stored with few minutes beam life time on Dec. 31 2014. The beam-cleaning process for mitigating the significant photon-stimulated-desorption (PSD) outgas inside the storage ring is one of the major purposes of the commissioning. The pressure in the beam duct was kept under 1E-6 Pa that limited the increase of beam current and the consequent upper bound of the Bremsstrahlung radiation level through the beam-cleaning. After three-months commissioning that has achieved the accumulated beam dose of 30 Ampere-hours, the average pressure was reduced to ~ 1.2E-7 Pa at 100 mA of stored beam current with life time of ~ 6 hour. Besides the vacuum conditioning, the beam emittance of 1.6 nm-rad approached to the goal has been demonstrated. In this paper, the concept about the high efficient beam-cleaning process and the progress of the commissioning for the TPS will be described.