Title :
Limitation of beam current in the PLS storage ring
Author :
Kim, E.-S. ; Chun, M.H. ; Huang, J.-Y. ; Huang, U.-H. ; Kang, H.S. ; Kim, D.T. ; Nam, S.H. ; Park, H.-J. ; Yang, J.-S. ; Yoon, M. ; Yu, I.H.
Author_Institution :
Pohang Accelerator Lab, POSTECH, Pohang, South Korea
Abstract :
We present investigations on beam instabilities that have been observed at 2.0 GeV and 2.5 GeV in the PLS storage ring. Stored beam currents of 2.0 GeV in the ring has been mainly limited by coupled-bunch instabilities. We have investigated dependences of the coupled-bunch instabilities on betatron tune, chromaticity and RF cavity temperatures at 2.0 GeV. 450 mA beam could be stored at 2.0 GeV. Bunch filling patterns and betatron tune are investigated to suppress the beam instabilities at 2.5 GeV. At 2.5 GeV, we do not observe any beam instabilities up to 200 mA. Higher beam currents than 200 mA are limited by total RF power
Keywords :
X-ray production; accelerator RF systems; accelerator cavities; electron accelerators; particle beam bunching; particle beam stability; storage rings; 2 GeV; 2.5 GeV; 200 mA; 450 mA; PLS storage ring; RF cavity temperatures; beam current limitation; beam instabilities; betatron tune; bunch filling patterns; chromaticity; coupled-bunch instabilities; Acceleration; Filling; Linear particle accelerator; Optical coupling; Particle beams; Power generation; Shape; Storage rings; Synchrotron radiation; Temperature dependence;
Conference_Titel :
Particle Accelerator Conference, 2001. PAC 2001. Proceedings of the 2001
Conference_Location :
Chicago, IL
Print_ISBN :
0-7803-7191-7
DOI :
10.1109/PAC.2001.987238
