1. Crab crossing plan
Optimize the crabbing system for best beam stability and minimum emittance impact
Study and specify tolerances on cavity multipole components by estimating impact on the ring’s dynamic aperture
Study effects of and specify tolerances on crab cavity errors such as misalignment, amplitude and phase instability
Specify high-order mode requirements
Specify requirement on the beam parameters such as maximum bunch length
Evaluate and optimize impedance of the crab cavities
Complete beam dynamics simulation using an optimized field map satisfying the determined requirements

2. Emittance growth with crabbing
~13% emittance increase
Emittance level can be recovered after ramping CC down

3. Impact of b3 on Dynamic Aperture
Dynamic Aperture: Maximum stable amplitude of motion
V/m^3
mT/m
(mT/m)/1MV
0.00E+00
2.00E+10
4.00E+10
6.00E+10
8.00E+10
1.00E+11
1.20E+11

4. Single-cell RFD cavities
Cavity Designs – MHz
RFD cavities at MHz are analyzed with 60 mm and 70 mm apertures
Single-cell RFD cavities
3-cell RFD cavities
17.4 cm
16.7 cm
6 cm
7 cm
19.5 cm
18.5 cm
6 cm
7 cm
54 cm
Suba De Silva, March 10, 2017

5. Properties Suba De Silva, March 10, 2017 1-cell-60-mm 1-cell-70-mm
-7.4E-14
-1.1E-13
[V] vt
1.40E+06
1.20E+06
4.70E+06
4.20E+06 b0
0.00E+00
mT m-2 b1
4.67E+00
4.00E+00
1.57E+01
1.40E+01
mT m-1 b2
-1.76E-03
1.71E-04
-3.7E-14
-1.75E-13
-3.6E-14
-1.52E-13 mT b3
1.16E+03
9.43E+02
3.17E+03
2.53E+03
mT m b4
5.23E+00
-3.62E-01
-1.4E-10
-6.51E-10
-1.3E-11
-5.29E-11
mT m2 b5
-1.26E+05
-5.00E+04
-5.22E+05
-2.14E+05
mT m3 b6
-1.10E+04
5.51E+02
-9.3E-08
-4.39E-07
1.11E-07
4.68E-07
mT m4 b7
-1.3E+07
-1.89E+07
-1.2E+07
-1.49E+07
-3.1E+07
-1.49E+08
-1.4E+07
-5.74E+07
mT m5
Suba De Silva, March 10, 2017