Title :
Bunch pattern by-3 in PEP-II
Author :
Decker, F.J. ; Kulikov, A. ; Sullivan, M.
Author_Institution :
SLAC, Stanford, CA, USA
Abstract :
After a long 4-month down time where additional RF was installed and heating problems addressed, the PEP-II B-factory should be capable of delivering about 1.5 times the currents. This can only be done by going to more bunches from a full by-4 pattern to either a partly filled by-3 or by-2 pattern. The by-2 pattern has parasitic crossings, so the by-3 pattern is the next candidate. Heating issues from the different higher order modes, especially in the longitudinal and transverse feedback structures are a concern. Effects from an electron cloud seem to be still visible in the by-3 and by-2 pattern.
Keywords :
accelerator RF systems; electron accelerators; heating; particle beam bunching; particle beam diagnostics; storage rings; PEP-II B-factory; RF installation; beam position monitors; by-2 pattern; electron cloud effect; full by-4 pattern; heating issue; higher order modes; longitudinal feedback structure; low energy ring; parasitic crossing; partly filled by-3 bunch pattern; transverse feedback structure; Clouds; Electron beams; Elementary particle vacuum; Feedback; Heating; Linear particle accelerator; Radio frequency; Resonance; Switches; Timing;
Conference_Titel :
Particle Accelerator Conference, 2003. PAC 2003. Proceedings of the
Print_ISBN :
0-7803-7738-9
DOI :
10.1109/PAC.2003.1289092
