CLIC_DDS Vasim Khan 14.01.10

1. CLIC_DDS Vasim Khan 14.01.10

2. What I have done • DDS2 : 9 single cell (half-iris) simulations (with fine mesh) • Mesh optimisation for dipole simulations • Efficiency calculations: Non-interleaved and 8-fold interleaved structure • Three identical cell structure simulation and phase calculation (Floquet theorem) • Design: Three identical cells with tapered manifold • Full str. design : 24 detuned cells (full iris) with tapered manifold + beam pipe • Eigen and driven mode simulations : Full structure • Thesis : Three chapters done!

3. Typical single cell – half iris No fillet/chamfer yet ? Mesh : Monopole Vol + Sur + Sur. Appr. + additional 2 mm + 1mm + 2μm + 0.5 mm + 0.5 mm

4. Dipole mode mesh optimisation Mode # 1 Surface approximation only 2 mm + 1mm + 2μm Mode # 3 Surface approximation only Mode # 2 Surface approximation only 2 mm + 1mm + 2μm 2 mm + 1mm + 2μm

5. Dipole mode mesh optimisation 20 μm 10 μm 15 μm 5 μm 2 μm

6. DDS2 : 9 cell results

7. DDS2 : 9 cell results

8. DDS2 : 1 of 8 interleaved structures- to be built

9. DDS2 : RF properties Constraint 251 Constraint 41 Single structure <8 structures> <8 structures> Single structure

10. 3 identical cell structure

11. 3 detuned cell structure Cell # 13 Cell # 24 Cell # 1 Cell # 1 Cell # 13 Cell # 24

12. Manifold radius is const. in a given cell Manifold radius: Erf distribution 3 detuned cell structure with erf-distribution in manifold Manifold radius: Linear tapering 40 μm taper in manifold radius in each cell 3 detuned cell structure with tapered manifold

13. S11 Monopole 3 cell structure Manifold radius: Erf distribution S22 S12 & S21 S11 Dipole S22 S12 & S21

14. S11 Monopole 3 cell structure Manifold radius: Linear tapering S22 S12 & S21 S11 Dipole S22 S12 & S21

15. Full structure 24 detuned cells with tapered manifold and beam pipes S11 S22 S12 & S21 S11 Dipole Monopole S22 S12 & S21

16. I need to understand • How to use Master-Slave B.C. in asymmetric planes i.e. full iris single cell (beam pipe) in order to understand the effect of 40 micron taper in a manifold • Full str. simulation ...I have problems in getting all 24 modes • Phase calculation for a detuned structure....Floquet’s theorem is not applicable here • Tuning 24 cell detuned structure with beam pipes & 2 matching cells • S-parameters and driven modal simulations