Title :
Observation of a longitudinal coupled bunch instability with trains of bunches in CESR
Author :
Billing, Michael
Author_Institution :
Cornell Univ., Ithaca, NY, USA
Abstract :
A longitudinal coupled bunch instability has been observed in the operation of CESR with multiple trains of bunches. The instability threshold is dependent on the number of bunches per train and the spacing between those bunches. The threshold is also sensitive to parameters in the RF system leading to the conclusion that the RF cavities play a significant role in the dynamics. A summary of these observations is presented along with the design and status of a feedback system to stabilize the beams
Keywords :
accelerator control systems; colliding beam accelerators; electron accelerators; feedback; particle beam bunching; particle beam stability; storage rings; CESR; RF cavities; feedback system; instability threshold; longitudinal coupled bunch instability; Current measurement; Electron beams; Extraterrestrial measurements; Feedback; Filling; Frequency conversion; Positrons; Radio frequency; Synchrotrons; Threshold current;
Conference_Titel :
Particle Accelerator Conference, 1997. Proceedings of the 1997
Conference_Location :
Vancouver, BC
Print_ISBN :
0-7803-4376-X
DOI :
10.1109/PAC.1997.751194
