1. Update of Lattice Design for CEPC Main Ring
Yiwei Wang, Yuan Zhang, Chenghui Yu, Jie Gao
CEPC AP meeting, 22 SEP 2017

2. New lattice and DA:
bx*=0.36m
Longer sextupole in ARC: Lsd=1.2m, Lsf=0.6m
Finite length of sextupole in IR: Lhs=Lvs=0.3m, Lsdd=0.1m
Finite length of crab sextupole: Lcrab=1.0m
Reduce radiation effect due to quadrupole
Longer quadrupole in ARC: Lqf=Lqd=2.0*1.25m
Longer quadrupole in IR: Lqd0=1.73m*1.25, *2.0
Lower radiation due to quadrupoles

3. Longer QD0 LQF=LQD=2.0 m LQF=LQD=2.0 m LQD0=1.73 m  2.0
2Jx=20^2*EMITX;
2Jy=100^2*(EMITX*3/1000);
dE=0;
synchrotron radiation due to dipole: , 0
synchrotron radiation due to quadpole: e-05, e-05
synchrotron radiation due to sextpole: e-08, e-07
2Jx=20^2*EMITX;
2Jy=100^2*(EMITX*3/1000);
dE=0;
synchrotron radiation due to dipole: , 0
synchrotron radiation due to quadpole: e-05, e-05
synchrotron radiation due to sextpole: e-08, e-07

4. DA with damping vs damping+fluctuation
LQF=LQD=2.0 m
LQD0=1.73 m
LQF=LQD=2.0 m
LQD0=1.73 m  2.0 x y

5. Longer QCM and QM LQF=LQD=2.0 m LQF=LQD=2.0 m
LQCM=0.5m or 1m, LQM=0.5m or 1m
LQF=LQD=2.0 m
LQCM=3m, LQM=1m or 2m
2Jx=20^2*EMITX;
2Jy=100^2*(EMITX*3/1000);
dE=0;
synchrotron radiation due to dipole: , 0
synchrotron radiation due to quadpole: e-05, e-05
synchrotron radiation due to sextpole: e-08, e-07
2Jx=20^2*EMITX;
2Jy=100^2*(EMITX*3/1000);
dE=0;
synchrotron radiation due to dipole:
synchrotron radiation due to quadpole: e-05, e-05
synchrotron radiation due to sextpole: e-08, e-07

6. DA with damping vs damping+fluctuation
LQF=LQD=2.0 m
LQCM=0.5m or 1m, LQM=0.5m or 1m
LQF=LQD=2.0 m
LQCM=3m, LQM=1m or 2m x y

7. Longer QF LQF=LQD=2.0 m LQF=3.6m, LQD=2.0 m
LQCM=0.5m or 1m, LQM=0.5m or 1m
LQF=3.6m, LQD=2.0 m
LQCM=3m, LQM=1m or 2m

8. DA with damping vs damping+fluctuation
LQF=LQD=2.0 m
LQCM=0.5m or 1m, LQM=0.5m or 1m
LQF=3.6m, LQD=2.0 m
LQCM=3m, LQM=1m or 2m