Coupling and nonlinear dynamics correction 159
0
10
20
30
40
50
60
corrector index
0
0.05
0.1
0.15
rms response ratio
H-before
V-before
H-after
V-after
Figure 6.1 The ratios of cross-plane and in-plane rms orbit responses for the correctors, before and after the ICA-based optics and coupling corrections were applied in
an NSLS-II experiment.
0
20
40
60
80
100 120 140 160 180
BPM index
0
0.05
0.1
0.15
0.2
0.25
amplitude ratio
r 1 before
r 2 before
r 1 after
r 2 after
Figure 6.2 The amplitude ratios of betatron normal modes (obtained by ICA) in
the cross-plane and the primary plane (see Eq. (6.10)) before and after corrections
were applied in the NSLS-II experiment.