Title :
High order mode heating observations in the PEP-II interaction region
Author :
Ecklund, Stan ; Decker, Franz-Josef ; Fisher, Alan ; Kulikov, Artem ; Sullivan, Mike
Author_Institution :
SLAC Collaboration, Stanford Univ., CA, USA
Abstract :
High order mode (HOM) heating is observed in the PEP-II interaction region vacuum system by monitoring chamber temperatures in several locations. The region where the electron and positron beams enter a common chamber results in a RF cavity where the beams generate HOM heating. By determining the temperature dependence on the beam current, beam bunch length, and the phase of the two beams, information about the modes is extracted. The time response of the temperature and the geometry also aid in determining the source of the heat flow
Keywords :
accelerator RF systems; accelerator cavities; electron accelerators; electron beams; heating; particle beam bunching; particle beam diagnostics; particle beam stability; storage rings; HOM; PEP-II interaction region; beam bunch length; beam current; beam monitoring chamber temperatures; beam phase; electron beams; geometry; heat flow; high order mode heating observations; interaction region vacuum system; positron beams; radiofrequency cavity; ring vacuum chambers; time response; Data mining; Electron beams; Heating; Monitoring; Positrons; Radio frequency; Temperature dependence; Temperature measurement; Temperature sensors; Vacuum systems;
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.2001.988183
