1. Update on MEIC Nonlinear Dynamics Work
V.S. Morozov
Teleconference on Nonlinear Dynamics
April 7, 2015
F. Lin

2. Arc CCB v1 Modified arc FODO lattice matched to regular arc FODO
Most compact design but  functions are not optimal at the SXT1 locations
Chromatic contribution x = and y = -5.5
Sextupole strengths required to compensate 100 units of x/y chromaticity: k2lsxt1/2 = 0.47/-1.77
Contributions to first-order geometric terms due to
the phase advance between SXT1 not being exactly 
a finite value of x at SXT2
SXT1
SXT2 Re Im
h21000
-0.83
-23.4
h30000
-2.49
-23.3
h10110
-0.07
-1.94
h10020
1.47
11.6
h10200
0.75
-13.7

3. Arc CCB v2 Modified arc FODO lattice matched to regular arc FODO
Large dispersion and optimal  functions at the sextupole locations
Chromatic contribution x = -5.6 and y = -3.4
Sextupole strengths required to compensate 100 units of x/y chromaticity: k2lsxt1/2 = 0.175/-0.48
Contributions to first-order geometric terms due to
the phase advance between SXT1 not being exactly 
a finite value of x at SXT2
SXT1
SXT2 Re Im
h21000
-0.36
-9.36
h30000
-1.08
-9.32
h10110
-0.015
-0.38
h10020
5.38
3.67
h10200
5.58
-4.48

4. Arc CCB v3 Modified arc FODO lattice matched to regular arc FODO
Phase advance between SXT1 adjusted to 
Chromatic contribution x = and y = -6.3
Sextupole strengths required to compensate 100 units of x/y chromaticity: k2lsxt1/2 = 0.31/-0.66
Contributions to first-order geometric terms due to
a finite value of x at SXT2
SXT1
SXT2 Re Im
h21000
0.04
h30000
-0.013
h10110
-0.18
h10020
1.85
0.09
h10200
2.04
-0.09

5. Conclusions Arc CCB v3 looks most promising
Its chromatic contribution can perhaps be reduced by including more of the original FODO cells