Title :
Calculation of seed values for longitudinal coupled bunch dipole instability due to uneven bucket population
Author :
Koscielniak, S.R.
Author_Institution :
TRIUMF, Vancouver, BC, Canada
Abstract :
The author finds the beam response to sweeping the radio-frequency through a cavity parasitic resonance in order to calculate the increases in the individual bunch dipole moments and the coupled-bunch oscillation amplitude. In the KAON Booster, a hypothetical first HOM with Q=4000 and R/Q=30 gives a coupled-bunch dipole oscillation of 27 degrees of RF phase. This would swamp any injection timing errors.<>
Keywords :
particle beam diagnostics; proton accelerators; synchrotrons; KAON Booster; KAON Factory; beam response; bunch dipole moments; cavity parasitic resonance; coupled-bunch oscillation amplitude; injection timing errors; longitudinal coupled bunch dipole instability; seed values; uneven bucket population; Bandwidth; Impedance; Mesons; Optical coupling; Radio frequency; Resonance; Steady-state; Synchrotrons; Timing; Transient response;
Conference_Titel :
Particle Accelerator Conference, 1991. Accelerator Science and Technology., Conference Record of the 1991 IEEE
Conference_Location :
San Francisco, CA, USA
Print_ISBN :
0-7803-0135-8
DOI :
10.1109/PAC.1991.164758
