Title :
Observations of fast multi-bunch instability in the SPring-8 storage ring
Author :
Nakamura, T. ; Sasaki, S. ; Ohshima, T. ; Ooishi, M. ; Soutome, K. ; Takao, M.
Author_Institution :
JASRI/SPring-8, Hyogo, Japan
Abstract :
After the installation of new beam chambers of four 30 m long straight sections, we observed the vertical multi-bunch instability of low frequency modes and its strength dependence on the length of the bunch train and on the vacuum pressure. We measured the of betatron oscillation amplitude distribution inside the bunch train and the dependence of the amplitude of the betatron motion for a successive second train on the gap width between the first train and the change of the properties of the instability on the vacuum pressure of the straight sections
Keywords :
X-ray production; beam handling equipment; electron accelerators; electron beams; particle beam bunching; particle beam dynamics; particle beam stability; storage rings; 30 m; SPring-8 storage ring; beam chambers; beam instability; betatron motion; betatron oscillation amplitude distribution; bunch train length; chromaticity; fast multibunch instability; filling pattern; long straight sections; low frequency modes; vacuum pressure; Acceleration; Filling; Frequency; Magnetic properties; Motion measurement; Noise level; Optical coupling; Pressure measurement; Storage rings; Time measurement;
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.2001.987244
