162 Beam-based Correction and Optimization for Accelerators
0
5
10
15
20
25
30
skew quadrupoles
-3
-2
-1
0
1
2
3
skew K
1
L (m
-1
)
10
-3
LOCO
ICA
fit X/Y
Figure 6.5 Integrated skew quadrupole gradients in the NSLS-II experiment before
corrections by fitting the orbit response matrix (LOCO), fitting the ICA results
(ICA), or directly fitting turn-by-turn BPM data (fix X/Y).
20
40
y
(pm)
LOCO
20
40
y
(pm)
ICA
0
100
200
300
400
500
600
700
s (m)
20
40
y
(pm)
fit X/Y
Figure 6.6 The vertical projected emittances throughout the ring in the lattices
fitted by the three methods.