Longitudinal Phase Space
Stable “bucket”
Stable particle motion
(“bunch”)
f
=0 (no acceleration):
Stable “bucket”
(shrinks at high
phase)
Stable particle
motion
f
=60
°
(acceleration):
•
Generally, hold RF
amplitude
constant, and adjust
phase
to control acceleration.
•
If amplitude control is needed, it is accomplished by adjusting the
relative phase
of two sets of RF cavities.