1. New Chicane Option Total bending angle and start and end points fixed
Keep field in edge magnets maximum and adjust it in middle magnets with energy (suggested by Andrew)
Extreme case with a factor of 5 energy swing shown (intermediate cases possible)
Perhaps most relevant to ion ring (electron energy decoupled from ions and need to consider synchrotron radiation)
Probably most efficient way to adjust the path length for ions
Provides almost complete path length adjustment over the whole range without HJ
Sagitta in edge dipoles is an issue: grows ~linearly with bending angle
L = 1.97 m
x = 8.26 m
d = 11 cm

2. Electron Arc Chicane
Using current 15.2 m FODO cell design (5.4 m dipoles with 2.2 m separation)
One chicane per arc (also helps with synchronization of the 2nd IP), one extra FODO cell per arc
Takes up cells, which could otherwise be used for chromaticity compensation
x = 44 cm
x = -50 cm
Total bending angle and z length are fixed 2

3. System of Bypasses (Jiquan & Yuhong)
Jiquan’s geometry implemented in MAD-X
All numbers agree exactly with Jiquan’s 3