Title :
PLS RF system operation during the commissioning
Author :
Kwon, M. ; Yu, I.H. ; Park, H.-J. ; Han, D.H. ; Yoon, M. ; Kim, Y.S.
Author_Institution :
Accelerator Lab., POSTECH, Pohang, South Korea
Abstract :
The storage ring of the Pohang Light Source (PLS) is designed to store 100s mA of 2 GeV electrons injected from the full energy linear accelerator. To compensate for the synchrotron radiation loss three RF cavities were installed in one of the straight sections powered by three 60 kW-TV transmitters independently. Phase and amplitude are controlled by the separate low level systems. During the commissioning, since the beam lifetime is limited by the vacuum pressure, various accelerating voltages were set to investigate the system characteristics. Even one cavity is enough to store 100 mA of beam, whereas the vacuum-limited lifetime is few minutes at 1 mTorr. The cavity HOM-induced multi-bunch instabilities were observed at certain condition and cured to some extent by shifting phase and water temperature. General description of RF system performance and trouble-shoots during the commissioning are presented
Keywords :
accelerator RF systems; electron accelerators; particle beam stability; storage rings; 2 GeV; 60 kW; PLS RF system operation; Pohang Light Source; RF cavities; beam lifetime; cavity higher order mode-induced multi-bunch instabilities; commissioning; synchrotron radiation loss; vacuum-limited lifetime; Control systems; Electrons; Light sources; Linear accelerators; Particle beams; Propagation losses; Radio frequency; Storage rings; Synchrotron radiation; Transmitters;
Conference_Titel :
Particle Accelerator Conference, 1995., Proceedings of the 1995
Conference_Location :
Dallas, TX
Print_ISBN :
0-7803-2934-1
DOI :
10.1109/PAC.1995.505370
