HEAVY BEAM LOADING IN STORAGE-RING RADIO-FREQUENCY SYSTEMS

Effects arising from both steady-state and transient beam loading of a n rf system in circular accelerators are described. The stability of t he rf system and the particle beam is studied using a numerical model of the beam-cavity interaction with multiple feedback loops. Nonlinear ities in the power source are also considered. As a special case, a de tailed model of the Stanford Linear Collider damping rings is presente d. The effects of beam-induced transients and intensity jitter on the rf system are analyzed and are used to determine stability tolerances for incoming current variations. A low current limit is demonstrated a nd techniques are described to ease this limit. Implications for the d esign and operation of future storage ring rf systems are studied in t he heavily beam-loaded limit.